import { defineConfig } from 'vitest/config';

export default defineConfig({
  test: {
    // Node environment for all tests (server-side CJS modules, no browser APIs needed)
    environment: 'node',
    // Global test helpers (describe, it, expect, vi) without per-file imports
    globals: true,
    // Run each test file in an isolated module registry so module-level state
    // (tokenStore cache, config singletons) doesn't leak between files
    isolate: true,
    // Give each file its own data directory so tokenStore file I/O doesn't collide
    setupFiles: ['./tests/setup.js'],
    // Coverage via V8 (built into Node — no babel transform needed)
    coverage: {
      provider: 'v8',
      reporter: ['text', 'lcov', 'html'],
      reportsDirectory: './coverage',
      // Only measure coverage on production source files
      include: ['server/**/*.js'],
      exclude: [
        'server/index.js',   // entry point with side-effects (process.exit, log streams)
        'node_modules/**',
        'tests/**',
        'coverage/**'
      ],
      // Per-file thresholds for the critical security/auth files we actively test.
      // Overall project thresholds are lower because dashboard.js and poller.js
      // are large files that require complex external service mocks (future work).
      thresholds: {
        lines: 25,
        functions: 12,
        branches: 12,
        statements: 25,
        perFile: false,
        // Individual file thresholds for the files we DO test
        'server/app.js': { lines: 85, functions: 80, branches: 65, statements: 85 },
        'server/routes/auth.js': { lines: 85, functions: 95, branches: 70, statements: 85 },
        'server/middleware/requireAuth.js': { lines: 75, functions: 0, branches: 80, statements: 75 },
        'server/utils/sanitizeError.js': { lines: 60, functions: 0, branches: 0, statements: 60 },
        'server/utils/config.js': { lines: 50, functions: 30, branches: 55, statements: 50 }
      }
    }
  }
});