module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'jsdom',
  roots: ['<rootDir>/src'],
  testMatch: ['**/__tests__/**/*.test.{ts,tsx}', '**/*.test.{ts,tsx}'],
  // 仅收集实际可单元测试的目录的覆盖率，排除 pages/API routes/admin 等需集成/E2E 测试的代码
  collectCoverageFrom: [
    'src/components/ui/**/*.{ts,tsx}',
    'src/components/layout/**/*.{ts,tsx}',
    'src/components/seo/**/*.{ts,tsx}',
    'src/components/detail/**/*.{ts,tsx}',
    'src/components/sections/**/*.{ts,tsx}',
    'src/components/content/**/*.{ts,tsx}',
    'src/hooks/**/*.{ts,tsx}',
    'src/lib/**/*.ts',
    '!src/**/*.d.ts',
    '!src/**/*.stories.{ts,tsx}',
    '!src/**/__tests__/**',
  ],
  // 覆盖率阈值采用渐进提升策略：基于 Phase 1-5 实测值设定目录级阈值，避免全局平均掩盖核心模块缺口
  // 实测基准 (Phase 5): global(~33% stmts/~32% branches), hooks(~61%/~41%), lib(~45%/~43%),
  // ui(~15%/~21%), layout(~59%/~48%), detail(~32%/~29%), sections(~31%/~35%), content(~29%/~5%),
  // lib/cms(~67%/~83%), lib/constants(~94%/~81%)
  coverageThreshold: {
    global: {
      branches: 30,
      functions: 25,
      lines: 32,
      statements: 30,
    },
    './src/hooks/': {
      branches: 38,
      functions: 60,
      lines: 60,
      statements: 60,
    },
    './src/lib/': {
      branches: 40,
      functions: 45,
      lines: 42,
      statements: 42,
    },
    './src/components/ui/': {
      branches: 18,
      functions: 10,
      lines: 15,
      statements: 14,
    },
    './src/components/layout/': {
      branches: 45,
      functions: 35,
      lines: 60,
      statements: 55,
    },
    './src/components/detail/': {
      branches: 25,
      functions: 22,
      lines: 30,
      statements: 30,
    },
    './src/components/sections/': {
      branches: 30,
      functions: 18,
      lines: 30,
      statements: 30,
    },
    './src/components/content/': {
      branches: 4,
      functions: 4,
      lines: 25,
      statements: 25,
    },
    './src/components/seo/': {
      branches: 0,
      functions: 20,
      lines: 45,
      statements: 45,
    },
    './src/lib/cms/': {
      branches: 80,
      functions: 75,
      lines: 60,
      statements: 65,
    },
    './src/lib/constants/': {
      branches: 80,
      functions: 55,
      lines: 90,
      statements: 90,
    },
  },
  coverageReporters: ['text', 'lcov', 'html', 'json'],
  coverageDirectory: '<rootDir>/coverage',
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
  },
  transform: {
    // ts-jest 需要明确指定 jsx: 'react-jsx'，因为项目 tsconfig 使用 'preserve'
    // 由后续 SWC/Babel 处理，但 Jest 环境下没有这些工具链
    '^.+\\.(ts|tsx)$': ['ts-jest', { tsconfig: { jsx: 'react-jsx' } }],
  },
  transformIgnorePatterns: [
    'node_modules/(?!(nanoid|next-auth|@auth)/)',
  ],
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  testTimeout: 10000,
  verbose: true,
  maxWorkers: '50%',
};