import { forwardRef, useState } from 'react'
import { Button } from '../index'
import { ButtonType, ButtonSize, ButtonSubType } from '../types'
import { Save, Download, Trash2, Check } from 'lucide-react'
import { buttonAccessibilityReport } from './ButtonAccessibilityReport'
import {
    generateAccessibilityReport,
    downloadReport,
    getMimeType,
    getFileExtension,
    type ReportFormat,
} from '../../shared/accessibility/reportGenerator'
import { Download as DownloadIcon } from 'lucide-react'

export type ButtonAccessibilityProps = {
    className?: string
}

const ButtonAccessibility = forwardRef<
    HTMLDivElement,
    ButtonAccessibilityProps
>(({ className }, ref) => {
    const [selectedFormat, setSelectedFormat] =
        useState<ReportFormat>('markdown')
    const [includeTestResults, setIncludeTestResults] = useState(true)
    const [includeRecommendations, setIncludeRecommendations] = useState(true)
    const [togglePressed, setTogglePressed] = useState(false)
    const [loadingButton, setLoadingButton] = useState(false)
    const [reportHtmlContent, setReportHtmlContent] = useState<string | null>(
        null
    )
    const [showFullReport, setShowFullReport] = useState(false)

    const handleLoadingDemo = () => {
        setLoadingButton(true)
        setTimeout(() => setLoadingButton(false), 3000)
    }

    const handleDownload = () => {
        try {
            const content = generateAccessibilityReport(
                buttonAccessibilityReport,
                {
                    format: selectedFormat,
                    includeTestResults,
                    includeRecommendations,
                }
            )

            const filename = `button-accessibility-report-${buttonAccessibilityReport.reportDate}.${getFileExtension(selectedFormat)}`
            const mimeType = getMimeType(selectedFormat)

            downloadReport(content, filename, mimeType)
        } catch (error) {
            console.error('Error generating report:', error)
            alert('Failed to generate report. Please try again.')
        }
    }

    const handleViewReport = () => {
        try {
            const htmlContent = generateAccessibilityReport(
                buttonAccessibilityReport,
                {
                    format: 'html',
                    includeTestResults,
                    includeRecommendations,
                }
            )
            setReportHtmlContent(htmlContent)
            setShowFullReport(true)
        } catch (error) {
            console.error('Error generating report:', error)
            alert('Failed to generate report. Please try again.')
        }
    }

    const report = buttonAccessibilityReport
    const compliantCount = report.criteria.filter(
        (c) => c.status === 'compliant'
    ).length
    const nonCompliantCount = report.criteria.filter(
        (c) => c.status === 'non-compliant'
    ).length
    const unsureCount = report.criteria.filter(
        (c) => c.status === 'unsure'
    ).length
    const totalApplicable = report.criteria.filter(
        (c) => c.status !== 'not-applicable'
    ).length
    const complianceRate =
        totalApplicable > 0
            ? Math.round((compliantCount / totalApplicable) * 100)
            : 0

    return (
        <div ref={ref} className={className}>
            <div className="p-8 space-y-8 max-w-7xl mx-auto">
                <div className="space-y-4">
                    <div className="flex items-start justify-between">
                        <div>
                            <h1 className="text-3xl font-bold mb-1">
                                Button Component Accessibility
                            </h1>
                            <div className="flex items-center gap-3 text-sm text-gray-500 mb-2">
                                <span>WCAG {report.wcagVersion}</span>
                                <span>•</span>
                                <span>{report.conformanceLevel}</span>
                                <span>•</span>
                                <span>{report.reportDate}</span>
                            </div>
                            <div className="flex items-center gap-2 text-xs text-gray-400">
                                <span>Evaluates: WCAG 2.0, 2.1, 2.2</span>
                            </div>
                        </div>
                        <div
                            className={`px-3 py-1.5 rounded-md font-semibold text-sm text-white ${
                                report.overallStatus === 'compliant'
                                    ? 'bg-green-600'
                                    : report.overallStatus === 'partial'
                                      ? 'bg-orange-600'
                                      : report.overallStatus === 'unsure'
                                        ? 'bg-yellow-600'
                                        : 'bg-red-600'
                            }`}
                        >
                            {report.overallStatus.toUpperCase()}
                        </div>
                    </div>

                    <div className="grid grid-cols-2 md:grid-cols-4 gap-3">
                        <div className="bg-white border-2 border-green-200 rounded-lg p-4 shadow-sm">
                            <div className="text-2xl font-bold mb-1 text-green-600">
                                {compliantCount}
                            </div>
                            <div className="text-xs font-medium text-gray-700">
                                Compliant ✅
                            </div>
                            <div className="text-xs text-gray-500 mt-1">
                                Verified & tested
                            </div>
                        </div>
                        <div className="bg-white border-2 border-red-200 rounded-lg p-4 shadow-sm">
                            <div className="text-2xl font-bold mb-1 text-red-600">
                                {nonCompliantCount}
                            </div>
                            <div className="text-xs font-medium text-gray-700">
                                Non-Compliant ❌
                            </div>
                            <div className="text-xs text-gray-500 mt-1">
                                Issues found
                            </div>
                        </div>
                        <div className="bg-white border-2 border-orange-200 rounded-lg p-4 shadow-sm">
                            <div className="text-2xl font-bold mb-1 text-orange-600">
                                {unsureCount}
                            </div>
                            <div className="text-xs font-medium text-gray-700">
                                Unsure ⚠️
                            </div>
                            <div className="text-xs text-gray-500 mt-1">
                                Needs verification
                            </div>
                        </div>
                        <div className="bg-white border-2 border-blue-200 rounded-lg p-4 shadow-sm">
                            <div className="text-2xl font-bold mb-1 text-blue-600">
                                {complianceRate}%
                            </div>
                            <div className="text-xs font-medium text-gray-700">
                                Compliance Rate
                            </div>
                            <div className="text-xs text-gray-500 mt-1">
                                Based on verified items
                            </div>
                        </div>
                    </div>

                    {/* Unsure Items Warning */}
                    {unsureCount > 0 && (
                        <div className="bg-orange-50 border-2 border-orange-300 rounded-lg p-4">
                            <div className="flex items-start gap-3">
                                <span className="text-2xl">⚠️</span>
                                <div>
                                    <h3 className="font-semibold text-orange-900 mb-1">
                                        Manual Verification Required
                                    </h3>
                                    <p className="text-orange-800 text-sm">
                                        {unsureCount} criterion/criteria marked
                                        as "unsure" require manual verification.
                                        These items need testing with contrast
                                        checkers, screen readers, or depend on
                                        application context. See verification
                                        instructions below.
                                    </p>
                                </div>
                            </div>
                        </div>
                    )}

                    {/* Summary & Download */}
                    <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
                        <div className="lg:col-span-2 bg-gray-50 border border-gray-200 rounded-lg p-4">
                            <h2 className="text-lg font-semibold mb-2">
                                Summary
                            </h2>
                            <p className="text-sm text-gray-700 leading-relaxed">
                                {report.summary}
                            </p>
                        </div>

                        <div className="bg-white border border-gray-200 rounded-lg p-4">
                            <h2 className="text-lg font-semibold mb-3">
                                Download Report
                            </h2>
                            <div className="space-y-3">
                                <div className="flex flex-col gap-2">
                                    <label className="text-xs font-medium text-gray-700">
                                        Format
                                    </label>
                                    <div className="flex gap-1">
                                        <button
                                            onClick={() =>
                                                setSelectedFormat('markdown')
                                            }
                                            className={`flex-1 px-2 py-1.5 rounded text-xs font-medium transition-colors ${
                                                selectedFormat === 'markdown'
                                                    ? 'bg-primary-100 text-primary-700 border border-primary-300'
                                                    : 'bg-gray-100 text-gray-700 hover:bg-gray-200'
                                            }`}
                                        >
                                            MD
                                        </button>
                                        <button
                                            onClick={() =>
                                                setSelectedFormat('html')
                                            }
                                            className={`flex-1 px-2 py-1.5 rounded text-xs font-medium transition-colors ${
                                                selectedFormat === 'html'
                                                    ? 'bg-primary-100 text-primary-700 border border-primary-300'
                                                    : 'bg-gray-100 text-gray-700 hover:bg-gray-200'
                                            }`}
                                        >
                                            HTML
                                        </button>
                                        <button
                                            onClick={() =>
                                                setSelectedFormat('json')
                                            }
                                            className={`flex-1 px-2 py-1.5 rounded text-xs font-medium transition-colors ${
                                                selectedFormat === 'json'
                                                    ? 'bg-primary-100 text-primary-700 border border-primary-300'
                                                    : 'bg-gray-100 text-gray-700 hover:bg-gray-200'
                                            }`}
                                        >
                                            JSON
                                        </button>
                                    </div>
                                </div>
                                <div className="space-y-2">
                                    <label className="flex items-center gap-2 text-xs">
                                        <input
                                            type="checkbox"
                                            checked={includeTestResults}
                                            onChange={(e) =>
                                                setIncludeTestResults(
                                                    e.target.checked
                                                )
                                            }
                                            className="w-3.5 h-3.5"
                                        />
                                        <span className="text-gray-700">
                                            Test Results
                                        </span>
                                    </label>
                                    <label className="flex items-center gap-2 text-xs">
                                        <input
                                            type="checkbox"
                                            checked={includeRecommendations}
                                            onChange={(e) =>
                                                setIncludeRecommendations(
                                                    e.target.checked
                                                )
                                            }
                                            className="w-3.5 h-3.5"
                                        />
                                        <span className="text-gray-700">
                                            Recommendations
                                        </span>
                                    </label>
                                </div>
                                <div className="space-y-2">
                                    <Button
                                        text="Download"
                                        leadingIcon={<DownloadIcon size={14} />}
                                        buttonType={ButtonType.PRIMARY}
                                        size={ButtonSize.SMALL}
                                        onClick={handleDownload}
                                        fullWidth
                                    />
                                    <Button
                                        text={
                                            showFullReport
                                                ? 'Hide Full Report'
                                                : 'View Full Report'
                                        }
                                        buttonType={ButtonType.SECONDARY}
                                        size={ButtonSize.SMALL}
                                        onClick={handleViewReport}
                                        fullWidth
                                    />
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                {/* Full Report Viewer */}
                {showFullReport && reportHtmlContent && (
                    <section className="bg-white border-2 border-gray-300 rounded-lg p-6 shadow-lg">
                        <div className="flex items-center justify-between mb-4 pb-3 border-b border-gray-200">
                            <div>
                                <h2 className="text-xl font-bold text-gray-900">
                                    Full Accessibility Report
                                </h2>
                                <p className="text-sm text-gray-500 mt-1">
                                    Interactive HTML report (same as downloaded
                                    version)
                                </p>
                            </div>
                            <button
                                onClick={() => {
                                    setShowFullReport(false)
                                    setReportHtmlContent(null)
                                }}
                                className="px-3 py-1.5 text-sm font-medium text-gray-700 bg-gray-100 hover:bg-gray-200 rounded-md transition-colors"
                            >
                                Close
                            </button>
                        </div>
                        <div className="border border-gray-200 rounded-lg overflow-hidden bg-white">
                            <iframe
                                srcDoc={reportHtmlContent}
                                className="w-full"
                                style={{
                                    height: '700px',
                                    border: 'none',
                                }}
                                title="Accessibility Report"
                                sandbox="allow-same-origin"
                            />
                        </div>
                        <div className="mt-4 pt-4 border-t border-gray-200 flex items-center justify-between">
                            <p className="text-xs text-gray-500">
                                Report generated on{' '}
                                {new Date().toLocaleString()}
                            </p>
                            <div className="flex gap-2">
                                <Button
                                    text="Download HTML"
                                    leadingIcon={<DownloadIcon size={14} />}
                                    buttonType={ButtonType.PRIMARY}
                                    size={ButtonSize.SMALL}
                                    onClick={() => {
                                        const content =
                                            generateAccessibilityReport(
                                                buttonAccessibilityReport,
                                                {
                                                    format: 'html',
                                                    includeTestResults,
                                                    includeRecommendations,
                                                }
                                            )
                                        const filename = `button-accessibility-report-${buttonAccessibilityReport.reportDate}.html`
                                        downloadReport(
                                            content,
                                            filename,
                                            'text/html'
                                        )
                                    }}
                                />
                                <Button
                                    text="Download Markdown"
                                    buttonType={ButtonType.SECONDARY}
                                    size={ButtonSize.SMALL}
                                    onClick={() => {
                                        const content =
                                            generateAccessibilityReport(
                                                buttonAccessibilityReport,
                                                {
                                                    format: 'markdown',
                                                    includeTestResults,
                                                    includeRecommendations,
                                                }
                                            )
                                        const filename = `button-accessibility-report-${buttonAccessibilityReport.reportDate}.md`
                                        downloadReport(
                                            content,
                                            filename,
                                            'text/markdown'
                                        )
                                    }}
                                />
                                <Button
                                    text="Download JSON"
                                    buttonType={ButtonType.SECONDARY}
                                    size={ButtonSize.SMALL}
                                    onClick={() => {
                                        const content =
                                            generateAccessibilityReport(
                                                buttonAccessibilityReport,
                                                {
                                                    format: 'json',
                                                    includeTestResults,
                                                    includeRecommendations,
                                                }
                                            )
                                        const filename = `button-accessibility-report-${buttonAccessibilityReport.reportDate}.json`
                                        downloadReport(
                                            content,
                                            filename,
                                            'application/json'
                                        )
                                    }}
                                />
                            </div>
                        </div>
                    </section>
                )}

                {/* Interactive Demo Section */}
                <section className="space-y-6">
                    <div>
                        <h2 className="text-2xl font-bold mb-2">
                            Interactive Accessibility Demo
                        </h2>
                        <p className="text-gray-600">
                            This demo showcases WCAG 2.1 Level AA compliance
                            features. Use keyboard navigation (Tab, Enter,
                            Space) and screen readers to experience
                            accessibility features.
                        </p>
                    </div>

                    {/* WCAG Principle 1: Perceivable */}
                    <div className="space-y-4">
                        <h3 className="text-xl font-semibold">
                            1. Perceivable
                        </h3>

                        <div className="border-l-4 border-blue-500 pl-6 space-y-4">
                            <div>
                                <h4 className="text-lg font-semibold">
                                    1.1.1 Non-text Content (Level A)
                                </h4>
                                <p className="text-sm text-gray-600 mb-4">
                                    Icon-only buttons with aria-label
                                </p>
                                <div className="flex gap-4 flex-wrap">
                                    <Button
                                        leadingIcon={<Save />}
                                        subType={ButtonSubType.ICON_ONLY}
                                        aria-label="Save document"
                                        buttonType={ButtonType.PRIMARY}
                                        size={ButtonSize.MEDIUM}
                                    />
                                    <Button
                                        leadingIcon={<Download />}
                                        subType={ButtonSubType.ICON_ONLY}
                                        aria-label="Download file"
                                        buttonType={ButtonType.SECONDARY}
                                        size={ButtonSize.MEDIUM}
                                    />
                                    <Button
                                        leadingIcon={<Trash2 />}
                                        subType={ButtonSubType.ICON_ONLY}
                                        aria-label="Delete item"
                                        buttonType={ButtonType.DANGER}
                                        size={ButtonSize.MEDIUM}
                                    />
                                </div>
                            </div>
                        </div>
                    </div>

                    {/* WCAG Principle 2: Operable */}
                    <div className="space-y-4">
                        <h3 className="text-xl font-semibold">2. Operable</h3>

                        <div className="border-l-4 border-green-500 pl-6 space-y-4">
                            <div>
                                <h4 className="text-lg font-semibold">
                                    2.1.1 Keyboard (Level A)
                                </h4>
                                <p className="text-sm text-gray-600 mb-4">
                                    All functionality available via keyboard
                                </p>
                                <div className="flex gap-4 flex-wrap">
                                    <Button
                                        text="Tab to focus me"
                                        buttonType={ButtonType.PRIMARY}
                                        size={ButtonSize.MEDIUM}
                                        onClick={() =>
                                            alert(
                                                'Button activated via keyboard!'
                                            )
                                        }
                                    />
                                    <Button
                                        text="Press Enter or Space"
                                        buttonType={ButtonType.SECONDARY}
                                        size={ButtonSize.MEDIUM}
                                        onClick={() =>
                                            alert('Keyboard activation works!')
                                        }
                                    />
                                </div>
                            </div>

                            <div>
                                <h4 className="text-lg font-semibold">
                                    2.4.7 Focus Visible (Level AA)
                                </h4>
                                <p className="text-sm text-gray-600 mb-4">
                                    Visible focus indicators
                                </p>
                                <div className="flex gap-4 flex-wrap">
                                    <Button
                                        text="Focus me with Tab"
                                        buttonType={ButtonType.PRIMARY}
                                        size={ButtonSize.MEDIUM}
                                    />
                                    <Button
                                        text="Then this one"
                                        buttonType={ButtonType.SECONDARY}
                                        size={ButtonSize.MEDIUM}
                                    />
                                </div>
                            </div>
                        </div>
                    </div>

                    {/* WCAG Principle 4: Robust */}
                    <div className="space-y-4">
                        <h3 className="text-xl font-semibold">4. Robust</h3>

                        <div className="border-l-4 border-red-500 pl-6 space-y-4">
                            <div>
                                <h4 className="text-lg font-semibold">
                                    4.1.2 Name, Role, Value (Level A)
                                </h4>
                                <p className="text-sm text-gray-600 mb-4">
                                    Toggle button with aria-pressed
                                </p>
                                <div className="flex gap-4 flex-wrap">
                                    <Button
                                        text={
                                            togglePressed
                                                ? 'Following'
                                                : 'Follow'
                                        }
                                        buttonType={
                                            togglePressed
                                                ? ButtonType.SECONDARY
                                                : ButtonType.PRIMARY
                                        }
                                        size={ButtonSize.MEDIUM}
                                        aria-pressed={togglePressed}
                                        onClick={() =>
                                            setTogglePressed(!togglePressed)
                                        }
                                    />
                                </div>
                            </div>

                            <div>
                                <h4 className="text-lg font-semibold">
                                    4.1.3 Status Messages (Level AA)
                                </h4>
                                <p className="text-sm text-gray-600 mb-4">
                                    Loading state announcements
                                </p>
                                <div className="flex gap-4 flex-wrap">
                                    <Button
                                        text="Save Changes"
                                        buttonType={ButtonType.PRIMARY}
                                        size={ButtonSize.MEDIUM}
                                        loading={loadingButton}
                                        onClick={handleLoadingDemo}
                                    />
                                </div>
                            </div>
                        </div>
                    </div>
                </section>

                <section className="bg-white border border-gray-200 rounded-lg p-6">
                    <h2 className="text-xl font-bold mb-4">
                        WCAG Guidelines Coverage
                    </h2>
                    <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
                        <div className="bg-blue-50 border border-blue-200 rounded-lg p-4">
                            <h3 className="font-semibold text-blue-900 mb-2">
                                WCAG 2.0 (2008)
                            </h3>
                            <p className="text-xs text-blue-800 mb-2">
                                Foundation guidelines
                            </p>
                            <ul className="text-xs text-blue-700 space-y-1">
                                {report.wcagVersions['2.0'].map((item, idx) => (
                                    <li key={idx}>• {item}</li>
                                ))}
                            </ul>
                        </div>
                        <div className="bg-green-50 border border-green-200 rounded-lg p-4">
                            <h3 className="font-semibold text-green-900 mb-2">
                                WCAG 2.1 (2018)
                            </h3>
                            <p className="text-xs text-green-800 mb-2">
                                Current standard
                            </p>
                            <ul className="text-xs text-green-700 space-y-1">
                                {report.wcagVersions['2.1'].map((item, idx) => (
                                    <li key={idx}>• {item}</li>
                                ))}
                            </ul>
                        </div>
                        <div className="bg-purple-50 border border-purple-200 rounded-lg p-4">
                            <h3 className="font-semibold text-purple-900 mb-2">
                                WCAG 2.2 (2023)
                            </h3>
                            <p className="text-xs text-purple-800 mb-2">
                                Latest updates
                            </p>
                            <ul className="text-xs text-purple-700 space-y-1">
                                {report.wcagVersions['2.2'].map((item, idx) => (
                                    <li key={idx}>• {item}</li>
                                ))}
                            </ul>
                        </div>
                    </div>
                </section>

                {/* WCAG Criteria Overview */}
                <section className="bg-white border border-gray-200 rounded-lg p-6">
                    <h2 className="text-xl font-bold mb-4">
                        WCAG Success Criteria Evaluation
                    </h2>
                    <div className="space-y-4">
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-2">
                                Level A Criteria (15 evaluated)
                            </h3>
                            <p className="text-sm text-gray-600 mb-2">
                                Minimum requirements for basic accessibility.
                            </p>
                            <div className="bg-blue-50 border border-blue-200 rounded p-3">
                                <p className="text-xs font-medium text-blue-900 mb-1">
                                    Criteria:
                                </p>
                                <p className="text-xs text-blue-800">
                                    {report.testMethodology.wcagLevels.A.join(
                                        ', '
                                    )}
                                </p>
                            </div>
                        </div>
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-2">
                                Level AA Criteria (8 evaluated)
                            </h3>
                            <p className="text-sm text-gray-600 mb-2">
                                Enhanced accessibility requirements.
                            </p>
                            <div className="bg-green-50 border border-green-200 rounded p-3">
                                <p className="text-xs font-medium text-green-900 mb-1">
                                    Criteria:
                                </p>
                                <p className="text-xs text-green-800">
                                    {report.testMethodology.wcagLevels.AA.join(
                                        ', '
                                    )}
                                </p>
                            </div>
                        </div>
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-2">
                                Level AAA Criteria (2 evaluated)
                            </h3>
                            <p className="text-sm text-gray-600 mb-2">
                                Enhanced accessibility requirements. Currently
                                partially compliant - see issues below.
                            </p>
                            <div className="bg-purple-50 border border-purple-200 rounded p-3">
                                <p className="text-xs font-medium text-purple-900 mb-1">
                                    Criteria:
                                </p>
                                <p className="text-xs text-purple-800">
                                    {report.testMethodology.wcagLevels.AAA.join(
                                        ', '
                                    )}
                                </p>
                                <p className="text-xs text-purple-700 mt-2 italic">
                                    Note: Level AAA is not required for Level AA
                                    conformance. To achieve full AAA compliance,
                                    see recommendations section for required
                                    changes.
                                </p>
                            </div>
                        </div>
                    </div>
                </section>

                {/* Testing Methodology */}
                <section className="bg-white border border-gray-200 rounded-lg p-6">
                    <h2 className="text-xl font-bold mb-4">
                        Testing Methodology & Verification
                    </h2>
                    <div className="space-y-6">
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-3 flex items-center gap-2">
                                <span className="text-green-600">✓</span>
                                Automated Testing
                            </h3>
                            <div className="bg-gray-50 rounded-lg p-4">
                                <ul className="list-disc list-inside space-y-2 text-sm text-gray-700">
                                    {report.testMethodology.automated.map(
                                        (test, index) => (
                                            <li key={index}>{test}</li>
                                        )
                                    )}
                                </ul>
                            </div>
                        </div>
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-3 flex items-center gap-2">
                                <span className="text-blue-600">✓</span>
                                Manual Testing
                            </h3>
                            <div className="bg-gray-50 rounded-lg p-4">
                                <ul className="list-disc list-inside space-y-2 text-sm text-gray-700">
                                    {report.testMethodology.manual.map(
                                        (test, index) => (
                                            <li key={index}>{test}</li>
                                        )
                                    )}
                                </ul>
                            </div>
                        </div>
                        <div>
                            <h3 className="font-semibold text-gray-900 mb-3 flex items-center gap-2">
                                <span className="text-purple-600">🔧</span>
                                Verification Tools
                            </h3>
                            <div className="bg-gray-50 rounded-lg p-4">
                                <ul className="list-disc list-inside space-y-2 text-sm text-gray-700">
                                    {report.testMethodology.verificationTools.map(
                                        (tool, index) => (
                                            <li key={index}>{tool}</li>
                                        )
                                    )}
                                </ul>
                            </div>
                        </div>
                    </div>
                </section>

                {/* Verification Instructions */}
                <section className="bg-blue-50 border border-blue-200 rounded-lg p-6">
                    <h2 className="text-xl font-bold mb-4">
                        How to Verify Compliance
                    </h2>
                    <div className="space-y-4 text-sm">
                        <div>
                            <h3 className="font-semibold text-blue-900 mb-2">
                                1. Color Contrast Verification (1.4.3, 1.4.11)
                            </h3>
                            <ol className="list-decimal list-inside space-y-1 text-blue-800 ml-2">
                                <li>
                                    Open WebAIM Contrast Checker:
                                    https://webaim.org/resources/contrastchecker/
                                </li>
                                <li>
                                    Test each button variant:
                                    <ul className="list-disc list-inside ml-4 mt-1">
                                        <li>
                                            Primary: Text #FFFFFF on Background
                                            #0561E2 (should be ≥4.5:1)
                                        </li>
                                        <li>
                                            Secondary: Text #525866 on
                                            Background #FFFFFF (should be
                                            ≥4.5:1)
                                        </li>
                                        <li>
                                            Danger: Text #FFFFFF on Background
                                            #E7000B (should be ≥4.5:1)
                                        </li>
                                        <li>
                                            Success: Text #FFFFFF on Background
                                            #00A63E (should be ≥4.5:1)
                                        </li>
                                        <li>
                                            Disabled states: Verify lighter
                                            colors meet 4.5:1
                                        </li>
                                    </ul>
                                </li>
                                <li>
                                    Test focus indicators: Outline colors
                                    against button backgrounds (should be ≥3:1)
                                </li>
                                <li>
                                    Document results and update report status
                                </li>
                            </ol>
                        </div>
                        <div>
                            <h3 className="font-semibold text-blue-900 mb-2">
                                2. Keyboard Navigation Verification (2.1.1,
                                2.4.7)
                            </h3>
                            <ol className="list-decimal list-inside space-y-1 text-blue-800 ml-2">
                                <li>
                                    Navigate to page with buttons using only
                                    keyboard (Tab key)
                                </li>
                                <li>
                                    Verify all buttons receive focus in logical
                                    order
                                </li>
                                <li>
                                    Verify disabled buttons are skipped in tab
                                    order
                                </li>
                                <li>
                                    Press Enter or Space on focused button -
                                    verify activation
                                </li>
                                <li>
                                    Verify focus indicator is clearly visible
                                    (3px outline)
                                </li>
                                <li>Test Shift+Tab for reverse navigation</li>
                            </ol>
                        </div>
                        <div>
                            <h3 className="font-semibold text-blue-900 mb-2">
                                3. Screen Reader Verification (4.1.2, 4.1.3)
                            </h3>
                            <ol className="list-decimal list-inside space-y-1 text-blue-800 ml-2">
                                <li>
                                    Enable screen reader (NVDA/JAWS/VoiceOver)
                                </li>
                                <li>
                                    Navigate to buttons using screen reader
                                    navigation
                                </li>
                                <li>
                                    Verify buttons announce: "Button name,
                                    button"
                                </li>
                                <li>
                                    Verify icon-only buttons announce accessible
                                    name
                                </li>
                                <li>
                                    Verify loading state announces: "Loading,
                                    please wait"
                                </li>
                                <li>
                                    Verify disabled buttons announce disabled
                                    state
                                </li>
                                <li>
                                    Verify toggle buttons announce
                                    pressed/unpressed state
                                </li>
                            </ol>
                        </div>
                        <div>
                            <h3 className="font-semibold text-blue-900 mb-2">
                                4. Touch Target Size Verification (WCAG 2.5.5
                                AAA, 2.5.8 AA)
                            </h3>
                            <p className="text-sm text-blue-800 mb-2">
                                <strong>How to Test:</strong> Use browser
                                DevTools to measure the clickable area
                                (including padding).
                            </p>
                            <ol className="list-decimal list-inside space-y-1 text-blue-800 ml-2">
                                <li>
                                    <strong>Open Browser DevTools</strong> (F12
                                    or Right-click → Inspect)
                                </li>
                                <li>
                                    <strong>Select the button element</strong>{' '}
                                    in the Elements panel
                                </li>
                                <li>
                                    <strong>Check Computed Styles:</strong> Look
                                    for padding-top, padding-bottom,
                                    padding-left, padding-right
                                </li>
                                <li>
                                    <strong>Calculate Clickable Area:</strong>
                                    <ul className="list-disc list-inside ml-4 mt-1">
                                        <li>
                                            Clickable Height = element height +
                                            padding-top + padding-bottom
                                        </li>
                                        <li>
                                            Clickable Width = element width +
                                            padding-left + padding-right
                                        </li>
                                    </ul>
                                </li>
                                <li>
                                    <strong>Verify Requirements:</strong>
                                    <ul className="list-disc list-inside ml-4 mt-1">
                                        <li>
                                            Level AA (WCAG 2.5.8): Minimum
                                            24x24px
                                        </li>
                                        <li>
                                            Level AAA (WCAG 2.5.5): Minimum
                                            44x44px
                                        </li>
                                    </ul>
                                </li>
                                <li>
                                    <strong>
                                        Alternative Method - Console:
                                    </strong>
                                    <pre className="bg-blue-100 p-2 rounded mt-2 text-xs overflow-x-auto">
                                        {`const button = document.querySelector('button');
const styles = window.getComputedStyle(button);
const rect = button.getBoundingClientRect();
const clickableHeight = rect.height + 
  parseFloat(styles.paddingTop) + 
  parseFloat(styles.paddingBottom);
console.log('Clickable Height:', clickableHeight);
// Should be ≥44px for AAA, ≥24px for AA`}
                                    </pre>
                                </li>
                            </ol>
                        </div>
                        <div>
                            <h3 className="font-semibold text-blue-900 mb-2">
                                5. Automated Testing with axe-core
                            </h3>
                            <ol className="list-decimal list-inside space-y-1 text-blue-800 ml-2">
                                <li>
                                    Run: npm test Button.accessibility.test.tsx
                                </li>
                                <li>Review axe-core violations</li>
                                <li>
                                    Verify all rules pass: button-name,
                                    keyboard-navigation,
                                    aria-required-attributes
                                </li>
                                <li>
                                    Check color-contrast warnings (may require
                                    manual verification)
                                </li>
                            </ol>
                        </div>
                    </div>
                </section>

                {/* Testing Checklist */}
                <section className="bg-gray-50 border border-gray-200 rounded-lg p-6">
                    <h2 className="text-xl font-bold mb-4">
                        Accessibility Testing Checklist
                    </h2>
                    <ul className="space-y-2 text-sm">
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Keyboard Navigation:</strong> All
                                buttons reachable and activatable with keyboard
                                (Tab, Enter, Space)
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Screen Reader:</strong> Buttons
                                announced with accessible name and role
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-yellow-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Focus Indicators:</strong> Clear,
                                visible focus outline (VERIFY: contrast ratio
                                ≥3:1)
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-yellow-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Color Contrast:</strong> Text meets WCAG
                                AA standards (VERIFY: ≥4.5:1 for normal text)
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Touch Targets:</strong> Meets Level AAA
                                (44x44px minimum for large buttons)
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Icon-only Buttons:</strong> Have
                                aria-label or aria-labelledby
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Loading States:</strong> Announced to
                                screen readers via aria-live
                            </span>
                        </li>
                        <li className="flex items-start">
                            <Check className="w-5 h-5 text-green-600 mr-2 flex-shrink-0 mt-0.5" />
                            <span>
                                <strong>Disabled State:</strong> Removed from
                                tab order and clearly indicated
                            </span>
                        </li>
                    </ul>
                </section>
            </div>
        </div>
    )
})

ButtonAccessibility.displayName = 'ButtonAccessibility'

export default ButtonAccessibility