/**
 * aggregate-component-registry — i18n module-resource emission.
 *
 * Guards the regression where scaffolded module registries never registered
 * their translations through the SDK-surviving `addClientResources` channel, so
 * pages rendered raw i18n keys. The aggregator now emits a deterministic
 * `moduleResources.generated.ts` (the former hand-owned file) and wires its
 * import at the END of `componentRegistry.generated.ts` (which main.tsx imports
 * AFTER the SDK init).
 *
 * The bundles are discovered by SCANNING `src/i18n/locales/<locale>/*.json`
 * (basename = namespace) — NOT derived from registry filenames. Registries are
 * app-scoped (`<app>-<module>Registry.ts`) while scaffold-component writes bare
 * `<module>.json`; name-derived lookup silently matched nothing (raw keys on
 * every business page). The scan also registers `common.json` (ui-primitives /
 * dashboard keys the SDK core `common` namespace does not provide).
 */
import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import fs from 'node:fs'
import os from 'node:os'
import path from 'node:path'
import { generate, buildModuleResourcesFile, parseModuleResourcesConsistency, hasBusinessPages } from '../generate.js'

let root: string

function write(rel: string, content: string): void {
  const abs = path.join(root, rel)
  fs.mkdirSync(path.dirname(abs), { recursive: true })
  fs.writeFileSync(abs, content, 'utf-8')
}

function mkdir(rel: string): void {
  fs.mkdirSync(path.join(root, rel), { recursive: true })
}

/** A minimal per-module registry whose lazy import resolves on disk. */
function registry(module: string, key: string, pageVar: string): string {
  return `import { PageRegistry, lazyWithRetry } from '@atlashub/smartstack';
const ${pageVar} = lazyWithRetry(() => import('@/pages/${pageVar}'));
PageRegistry.register('${key}', ${pageVar});
`
}

beforeEach(() => {
  root = fs.mkdtempSync(path.join(os.tmpdir(), 'agg-i18n-'))
})

afterEach(() => {
  fs.rmSync(root, { recursive: true, force: true })
})

describe('buildModuleResourcesFile', () => {
  it('registers every locale bundle on disk through addClientResources', () => {
    write('src/i18n/locales/fr/taches.json', '{}')
    write('src/i18n/locales/en/taches.json', '{}')
    write('src/i18n/locales/fr/employes.json', '{}')
    write('src/i18n/locales/en/employes.json', '{}')

    const out = buildModuleResourcesFile(root)!
    expect(out).toContain(`import { addClientResources } from '@atlashub/smartstack';`)
    expect(out).toContain(`import frTaches from '../i18n/locales/fr/taches.json';`)
    expect(out).toContain(`import enEmployes from '../i18n/locales/en/employes.json';`)
    expect(out).toContain(`addClientResources('fr', {`)
    expect(out).toContain(`addClientResources('en', {`)
    expect(out).toContain(`taches: frTaches,`)
    expect(out).toContain(`employes: enEmployes,`)
  })

  it('quotes dashed namespace keys and PascalCases the import ident', () => {
    write('src/i18n/locales/fr/mes-taches.json', '{}')
    const out = buildModuleResourcesFile(root)!
    expect(out).toContain(`import frMesTaches from '../i18n/locales/fr/mes-taches.json';`)
    expect(out).toContain(`'mes-taches': frMesTaches,`)
  })

  it('registers only what exists on disk (no phantom namespaces)', () => {
    write('src/i18n/locales/fr/taches.json', '{}')
    const out = buildModuleResourcesFile(root)!
    expect(out).toContain('frTaches')
    expect(out).not.toContain('ghost')
  })

  it('is decoupled from registry naming — a bare <module>.json is found even when registries are app-scoped', () => {
    // The exact historical bug: registries renamed to <app>-<module>Registry.ts
    // while scaffold-component kept writing bare <module>.json — the old
    // name-derived lookup matched nothing and business pages rendered raw keys.
    write('src/i18n/locales/fr/clients.json', '{}')
    const out = buildModuleResourcesFile(root)!
    expect(out).toContain(`import frClients from '../i18n/locales/fr/clients.json';`)
    expect(out).toContain(`clients: frClients,`)
  })

  it('registers common.json (ui-primitives / dashboard keys the SDK does not ship)', () => {
    write('src/i18n/locales/fr/common.json', '{}')
    write('src/i18n/locales/fr/taches.json', '{}')
    const out = buildModuleResourcesFile(root)!
    expect(out).toContain(`import frCommon from '../i18n/locales/fr/common.json';`)
    expect(out).toContain(`common: frCommon,`)
    expect(out).toContain(`taches: frTaches,`)
    expect(out).toMatch(/^\/\/ Modules: 2 /m)
  })

  it('skips vitrine/login bundles — their own generated files register them', () => {
    write('src/i18n/locales/fr/vitrine.json', '{}')
    write('src/i18n/locales/fr/login.json', '{}')
    expect(buildModuleResourcesFile(root)).toBeNull()

    write('src/i18n/locales/fr/taches.json', '{}')
    const out = buildModuleResourcesFile(root)!
    // (the static header comment mentions vitrine.generated.ts — assert on the
    // import/registration lines, not the whole file)
    expect(out).not.toContain('vitrine.json')
    expect(out).not.toContain('login.json')
    expect(out).not.toContain('frVitrine')
    expect(out).not.toContain('frLogin')
    expect(out).toContain('taches: frTaches,')
  })

  it('returns null when there is no locales directory', () => {
    expect(buildModuleResourcesFile(root)).toBeNull()
  })

  it('returns null when the locales directory is present but holds no bundle', () => {
    mkdir('src/i18n/locales/fr')
    expect(buildModuleResourcesFile(root)).toBeNull()
  })
})

describe('hasBusinessPages', () => {
  it('detects nested business pages and ignores Home/hub pages', () => {
    expect(hasBusinessPages(root)).toBe(false)
    write('src/pages/crm/clients/ClientsSectionHomePage.tsx', 'export default null;')
    expect(hasBusinessPages(root)).toBe(false)
    write('src/pages/crm/clients/ClientListPage.tsx', 'export default null;')
    expect(hasBusinessPages(root)).toBe(true)
  })
})

describe('generate — wires moduleResources into the component registry', () => {
  it('emits moduleResources.generated.ts and imports it at the end of the aggregator', () => {
    write('src/pages/TachesList.tsx', 'export const TachesList = () => null;')
    write('src/extensions/tachesRegistry.ts', registry('taches', 'rh.taches.list', 'TachesList'))
    write('src/i18n/locales/fr/taches.json', '{}')
    write('src/i18n/locales/en/taches.json', '{}')

    const { files, unresolved, collisions } = generate({ projectPath: root, exclude: [] })
    expect(unresolved).toHaveLength(0)
    expect(collisions).toHaveLength(0)

    const registryFile = files.find((f) => f.path.endsWith('componentRegistry.generated.ts'))!
    const i18nFile = files.find((f) => f.path.endsWith('moduleResources.generated.ts'))
    expect(i18nFile).toBeDefined()
    expect(registryFile.content).toContain(`import './moduleResources.generated';`)
    // The i18n import must come AFTER the per-module registries (so it runs after
    // the SDK init, which main.tsx triggers before importing this aggregator).
    expect(registryFile.content.indexOf(`import './tachesRegistry';`))
      .toBeLessThan(registryFile.content.indexOf(`import './moduleResources.generated';`))
  })

  it('emits moduleResources for an APP-SCOPED registry with a bare module bundle (the raw-keys bug)', () => {
    write('src/pages/ClientListPage.tsx', 'export const ClientListPage = () => null;')
    write('src/extensions/crm-clientsRegistry.ts', registry('crm-clients', 'crm.clients.list', 'ClientListPage'))
    write('src/i18n/locales/fr/clients.json', '{}')

    const { files, errors, warnings } = generate({ projectPath: root, exclude: [] })
    expect(errors).toHaveLength(0)
    expect(warnings.some((w) => w.includes('found NO locale bundle'))).toBe(false)
    const i18nFile = files.find((f) => f.path.endsWith('moduleResources.generated.ts'))!
    expect(i18nFile).toBeDefined()
    expect(i18nFile.content).toContain('clients: frClients,')
    const registryFile = files.find((f) => f.path.endsWith('componentRegistry.generated.ts'))!
    expect(registryFile.content).toContain(`import './crm-clientsRegistry';`)
    expect(registryFile.content).toContain(`import './moduleResources.generated';`)
  })

  it('emits NO moduleResources import when the app has no module locale files', () => {
    write('src/pages/TachesList.tsx', 'export const TachesList = () => null;')
    write('src/extensions/tachesRegistry.ts', registry('taches', 'rh.taches.list', 'TachesList'))

    const { files } = generate({ projectPath: root, exclude: [] })
    const registryFile = files.find((f) => f.path.endsWith('componentRegistry.generated.ts'))!
    expect(registryFile.content).not.toContain('moduleResources.generated')
    expect(files.find((f) => f.path.endsWith('moduleResources.generated.ts'))).toBeUndefined()
  })
})

describe('generate — i18n regression guard (②) and ordering guard (④)', () => {
  it('② hard-errors when a prior moduleResources.generated.ts exists but this run resolves no locale bundle', () => {
    write('src/pages/TachesList.tsx', 'export const TachesList = () => null;')
    write('src/extensions/tachesRegistry.ts', registry('taches', 'rh.taches.list', 'TachesList'))
    // Stale sibling from a prior (good) run — but NO locale JSON exists this run.
    write(
      'src/extensions/moduleResources.generated.ts',
      `import { addClientResources } from '@atlashub/smartstack';\naddClientResources('fr', { taches: {} });\n`,
    )

    const { files, errors } = generate({ projectPath: root, exclude: [] })
    expect(errors).toHaveLength(1)
    expect(errors[0]).toContain('i18n regression guard')
    // Nothing emitted — the caller (index.ts) exits 1 before writing.
    expect(files).toHaveLength(0)
  })

  it('④ warns (non-fatal) when no bundle matched and no business page exists', () => {
    write('src/pages/TachesList.tsx', 'export const TachesList = () => null;')
    write('src/extensions/tachesRegistry.ts', registry('taches', 'rh.taches.list', 'TachesList'))
    mkdir('src/i18n/locales/fr') // locales dir exists, but holds no bundle

    const { files, errors, warnings } = generate({ projectPath: root, exclude: [] })
    expect(errors).toHaveLength(0)
    expect(warnings.some((w) => w.includes('found NO locale bundle'))).toBe(true)
    // componentRegistry still emitted, without the i18n import; no sibling emitted.
    const registryFile = files.find((f) => f.path.endsWith('componentRegistry.generated.ts'))!
    expect(registryFile).toBeDefined()
    expect(registryFile.content).not.toContain('moduleResources.generated')
    expect(files.find((f) => f.path.endsWith('moduleResources.generated.ts'))).toBeUndefined()
  })

  it('④ hard-errors when no bundle matched but BUSINESS pages exist (they WILL render raw keys)', () => {
    write('src/pages/crm/clients/ClientListPage.tsx', 'export const ClientListPage = () => null;')
    write('src/pages/ClientListPage.tsx', 'export const ClientListPage = () => null;')
    write('src/extensions/crm-clientsRegistry.ts', registry('crm-clients', 'crm.clients.list', 'ClientListPage'))
    mkdir('src/i18n/locales/fr') // locales dir exists, but holds no bundle

    const { files, errors } = generate({ projectPath: root, exclude: [] })
    expect(errors.some((e) => e.includes('i18n ordering guard'))).toBe(true)
    expect(files).toHaveLength(0)
  })

  it('neither warns nor errors for a genuinely i18n-less app (no locales dir, no sibling)', () => {
    write('src/pages/TachesList.tsx', 'export const TachesList = () => null;')
    write('src/extensions/tachesRegistry.ts', registry('taches', 'rh.taches.list', 'TachesList'))

    const { errors, warnings } = generate({ projectPath: root, exclude: [] })
    expect(errors).toHaveLength(0)
    expect(warnings.some((w) => w.includes('found NO locale bundle'))).toBe(false)
  })
})

describe('parseModuleResourcesConsistency — ⑤ canary core', () => {
  it('returns null when the "Modules:" header is absent', () => {
    expect(parseModuleResourcesConsistency(`addClientResources('fr', { taches: x });`)).toBeNull()
  })

  it('agrees (declared === namespaces.length) for a clean generated file', () => {
    write('src/i18n/locales/fr/taches.json', '{}')
    write('src/i18n/locales/en/taches.json', '{}')
    write('src/i18n/locales/fr/employes.json', '{}')
    const out = buildModuleResourcesFile(root)!
    const parsed = parseModuleResourcesConsistency(out)!
    expect(parsed.declared).toBe(2)
    expect(parsed.namespaces).toEqual(['employes', 'taches'])
  })

  it('stays consistent when common.json is registered alongside module bundles', () => {
    write('src/i18n/locales/fr/common.json', '{}')
    write('src/i18n/locales/fr/taches.json', '{}')
    const out = buildModuleResourcesFile(root)!
    const parsed = parseModuleResourcesConsistency(out)!
    expect(parsed.declared).toBe(2)
    expect(parsed.namespaces).toEqual(['common', 'taches'])
  })

  it('detects a torn header/body mismatch (Modules: 6 over a 1-namespace body)', () => {
    const torn = `// Modules: 6 · Locales: fr\nimport { addClientResources } from '@atlashub/smartstack';\naddClientResources('fr', {\n  taches: frTaches,\n});\n`
    const parsed = parseModuleResourcesConsistency(torn)!
    expect(parsed.declared).toBe(6)
    expect(parsed.namespaces).toEqual(['taches']) // 1 ≠ 6 → the canary caller fails loud
  })

  it('parses quoted (dashed) namespace keys', () => {
    const src = `// Modules: 1 · Locales: fr\naddClientResources('fr', {\n  'mes-taches': frMesTaches,\n});\n`
    const parsed = parseModuleResourcesConsistency(src)!
    expect(parsed.namespaces).toEqual(['mes-taches'])
  })
})