import React, { useMemo, useState } from 'react';
import {
  Lock,
  Shield,
  ShieldAlert,
  Scan,
  Activity,
  TrendingUp,
  Check,
  X,
  ChevronRight,
} from 'lucide-react';

const admin_url = tpsaAdmin.admin_url;
const allActiveFeatures = tpsaAdmin.feature_status.all_active_features;

const defaultFeatures = [
  {
    id: 'analytics',
    category: 'monitoring',
    name: 'Safety Analytics',
    description: 'Security insights',
    icon: TrendingUp,
    stats: { value: '98%', label: 'Score' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=analytics&tpsa-setting=analytics',
  },
  {
    id: 'limit-login-attempts',
    category: 'security-core',
    name: 'Limit Login Attempts',
    description: 'Prevent brute force attacks',
    icon: Lock,
    stats: { value: '0', label: 'Attacks Blocked' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=security-core&tpsa-setting=limit-login-attempts',
  },
  {
    id: 'custom-login-url',
    category: 'security-core',
    name: 'Custom Login URL',
    description: 'Prevent brute force attacks',
    icon: Lock,
    // stats: { value: '0', label: 'Attacks Blocked' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=security-core&tpsa-setting=custom-login-url',
  },
  {
    id: 'two-factor-auth',
    category: 'security-core',
    name: 'Two-Factor Authentication',
    description: 'Extra layer of security',
    icon: Shield,
    stats: { value: '0', label: 'Users Enabled' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=security-core&tpsa-setting=two-factor-auth',
  },
  {
    id: 'password-protection',
    category: 'security-core',
    name: 'Password Protection',
    description: 'Enforce strong passwords',
    icon: Lock,
    stats: { value: '6+', label: 'Min Characters' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=security-core&tpsa-setting=password-protection',
  },
  {
    id: 'recaptcha',
    category: 'security-core',
    name: 'Google reCAPTCHA',
    description: 'Bot protection',
    icon: Shield,
    // stats: { value: '0', label: 'Bots Blocked' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=security-core&tpsa-setting=recaptcha',
  },
  {
    id: 'web-application-firewall',
    category: 'firewall',
    name: 'Web Application Firewall',
    description: 'Real-time protection',
    icon: ShieldAlert,
    // stats: { value: '0', label: 'Threats Blocked' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=firewall-malware&tpsa-setting=web-application-firewall',
  },
  {
    id: 'advanced-malware-scanner',
    category: 'firewall',
    name: 'Malware Scanner',
    description: 'Automated scanning',
    icon: Scan,
    // stats: { value: '0', label: 'Files Scanned' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=firewall-malware&tpsa-setting=advanced-malware-scanner',
    isPro: true,
  },
  {
    id: 'login-logs-activity',
    category: 'monitoring',
    name: 'Login Logs & Activity',
    description: 'Track all login attempts',
    icon: Activity,
    stats: { value: '1', label: 'Today' },
    url:
      admin_url +
      'admin.php?page=tp-admin-safety-guard&tab=login-logs-activity&tpsa-setting=login-logs-activity#SuccessfulLogins',
  },
];

export default function FeatureGrid({
  items = defaultFeatures,
  category = 'all',
  onConfigure,
  onViewDetails,
  className = '',
}) {
  const [selectedFeature, setSelectedFeature] = useState(null);

  const filteredFeatures = useMemo(() => {
    if (!items?.length) return [];
    if (!category || category === 'all') return items;
    return items.filter((f) => f.category === category);
  }, [items, category]);

  const uid = useMemo(() => `fg-${Math.random().toString(36).slice(2, 9)}`, []);

  const toggle = (id) => {
    setSelectedFeature((prev) => (prev === id ? null : id));
  };

  return (
    <div className={`${uid} ${className}`}>
      <div className="fg-grid">
        {filteredFeatures.map((feature) => {
          const FeatureIcon = feature.icon;
          const isSelected = selectedFeature === feature.id;

          return (
            <div
              key={feature.id}
              role="button"
              tabIndex={0}
              aria-expanded={isSelected}
              className={`fg-card ${isSelected ? 'is-selected' : ''}`}
              onClick={() => toggle(feature.id)}
              onKeyDown={(e) => {
                if (e.key === 'Enter' || e.key === ' ') {
                  e.preventDefault();
                  toggle(feature.id);
                }
              }}
            >
              <div className="fg-cardInner">
                <div className="fg-headerRow">
                  <div
                    className={`fg-iconWrap ${isSelected ? 'is-selected' : ''}`}
                  >
                    <FeatureIcon
                      className={`fg-icon ${isSelected ? 'is-selected' : ''}`}
                      aria-hidden="true"
                    />
                  </div>

                  <span
                    className={`fg-status ${
                      allActiveFeatures.includes(feature.id)
                        ? 'is-active'
                        : 'is-inactive'
                    }`}
                  >
                    {allActiveFeatures.includes(feature.id) ? (
                      <span className="fg-statusInner">
                        <Check className="fg-statusIcon" aria-hidden="true" />
                        Active
                      </span>
                    ) : (
                      <span className="fg-statusInner">
                        <X className="fg-statusIcon" aria-hidden="true" />
                        Inactive
                      </span>
                    )}
                  </span>
                </div>

                <h4 className="fg-title">{feature.name}</h4>
                <p className="fg-desc">{feature.description}</p>

                {feature.stats && (
                  <div className="fg-footerRow">
                    <div>
                      <p className="fg-statValue">{feature.stats.value}</p>
                      <p className="fg-statLabel">{feature.stats.label}</p>
                    </div>

                    <ChevronRight
                      className={`fg-chevron ${isSelected ? 'is-selected' : ''}`}
                      aria-hidden="true"
                    />
                  </div>
                )}
              </div>

              <div className={`fg-panel ${isSelected ? 'is-open' : ''}`}>
                <div className="fg-panelInner">
                  <button
                    type="button"
                    className="fg-primaryBtn"
                    onClick={(e) => {
                      e.stopPropagation();
                      onConfigure?.(feature);
                      window.location.href = feature.url;
                    }}
                  >
                    Configure Settings
                  </button>
                </div>
              </div>
            </div>
          );
        })}
      </div>

      <style>{`
        /* Scoped by root class: .${uid} */
        .${uid} .fg-grid{
          display:grid;
          grid-template-columns:1fr;
          gap:24px;
          margin-top:32px;
        }
        @media (min-width:768px){
          .${uid} .fg-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
        }
        @media (min-width:1280px){
          .${uid} .fg-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); }
        }

        .${uid} .fg-card{
          position:relative;
          overflow:hidden;
          border-radius:16px;
          border:1px solid rgba(226,232,240,.75);
          background:#fff;
          text-align:left;
          cursor:pointer;
          padding:0;
          transition:border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
          box-shadow:0 0 0 rgba(0,0,0,0);
          /* since it's now a div, remove default button stuff is irrelevant, but keep layout */
        }
        .${uid} .fg-card:hover{
          border-color:rgba(203,213,225,1);
          box-shadow:0 12px 26px rgba(15,23,42,.08);
        }
        .${uid} .fg-card:focus-visible{
          outline:none;
          box-shadow:0 0 0 4px rgba(147,51,234,.18);
          border-color:rgba(147,51,234,.35);
        }
        .${uid} .fg-card.is-selected{
          border-color:rgba(196,181,253,.95);
          box-shadow:0 18px 38px rgba(168,85,247,.18);
        }

        .${uid} .fg-cardInner{ padding:24px; }

        .${uid} .fg-headerRow{
          display:flex;
          align-items:flex-start;
          justify-content:space-between;
          gap:12px;
          margin-bottom:16px;
        }

        .${uid} .fg-iconWrap{
          padding:12px;
          border-radius:12px;
          background:#f1f5f9;
          transition:background 200ms ease;
        }
        .${uid} .fg-card:hover .fg-iconWrap{ background:#e2e8f0; }
        .${uid} .fg-iconWrap.is-selected{
          background:linear-gradient(135deg,#a855f7,#ec4899);
        }

        .${uid} .fg-icon{ width:20px; height:20px; color:#475569; }
        .${uid} .fg-icon.is-selected{ color:#fff; }

        .${uid} .fg-status{
          display:inline-flex;
          align-items:center;
          border-radius:999px;
          padding:6px 10px;
          font-size:12px;
          font-weight:700;
          line-height:1;
          user-select:none;
        }
        .${uid} .fg-statusInner{
          display:inline-flex;
          align-items:center;
          gap:6px;
        }
        .${uid} .fg-statusIcon{ width:12px; height:12px; }

        .${uid} .fg-status.is-active{ background:#dcfce7; color:#15803d; }
        .${uid} .fg-status.is-inactive{ background:#f1f5f9; color:#475569; }

        .${uid} .fg-title{
          margin:0 0 4px 0;
          font-size:16px;
          font-weight:700;
          color:#0f172a;
        }
        .${uid} .fg-desc{
          margin:0 0 16px 0;
          font-size:13px;
          color:#64748b;
        }

        .${uid} .fg-footerRow{
          display:flex;
          align-items:center;
          justify-content:space-between;
          padding-top:16px;
          border-top:1px solid #f1f5f9;
        }
        .${uid} .fg-statValue{
          margin:0;
          font-size:26px;
          font-weight:800;
          color:#0f172a;
          letter-spacing:-0.02em;
        }
        .${uid} .fg-statLabel{
          margin:2px 0 0 0;
          font-size:12px;
          color:#64748b;
        }

        .${uid} .fg-chevron{
          width:20px;
          height:20px;
          color:#94a3b8;
          transition:transform 200ms ease, color 200ms ease;
        }
        .${uid} .fg-card:hover .fg-chevron{
          transform:translateX(4px);
          color:#64748b;
        }
        .${uid} .fg-chevron.is-selected{
          transform:rotate(90deg);
          color:#9333ea;
        }

        .${uid} .fg-panel{
          background:#f8fafc;
          max-height:0;
          overflow:hidden;
          transition:max-height 260ms ease;
        }
        .${uid} .fg-panel.is-open{ max-height:200px; }

        .${uid} .fg-panelInner{
          padding:18px 24px 24px;
          display:grid;
          gap:10px;
        }

        .${uid} .fg-primaryBtn{
          width:100%;
          border:0;
          border-radius:12px;
          padding:12px 14px;
          cursor:pointer;
          color:#fff;
          font-weight:700;
          background:linear-gradient(90deg,#7c3aed,#ec4899);
          transition:transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
        }
        .${uid} .fg-primaryBtn:hover{
          box-shadow:0 12px 26px rgba(124,58,237,.22);
          transform:translateY(-1px) scale(1.01);
          filter:brightness(1.02);
        }
        .${uid} .fg-primaryBtn:active{ transform:translateY(0) scale(1); }

        .${uid} .fg-secondaryBtn{
          width:100%;
          border-radius:12px;
          padding:12px 14px;
          cursor:pointer;
          background:#fff;
          border:1px solid #e2e8f0;
          color:#334155;
          font-weight:700;
          transition:background 160ms ease, border-color 160ms ease;
        }
        .${uid} .fg-secondaryBtn:hover{
          background:#f8fafc;
          border-color:#cbd5e1;
        }
      `}</style>
    </div>
  );
}