// Copyright (c) 2026 Gordon Bolton. MIT License.
import { defineConfig } from 'vitest/config';

export default defineConfig({
  test: {
    // 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'],
    // Environment configuration based on test type
    environmentMatchGlobs: [
      // Server tests use node environment (must come first - more specific)
      ['tests/unit/**/*.js', 'node'],
      ['tests/integration/**/*.js', 'node'],
      // Frontend tests need jsdom for DOM APIs (broader pattern comes last)
      ['tests/frontend/**/*.js', 'jsdom']
    ],
    // 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/**'
      ],
      // Global thresholds only — per-file thresholds are avoided because V8's
      // coverage counting varies across Node versions (CI consistently reports
      // ~10-15% lower than local for module-wrapper and require() lines).
      // Thresholds updated after adding integration tests for dashboard.js,
      // emby.js, sonarr.js, radarr.js, and sabnzbd.js.  The SSE /stream
      // endpoint and poller.js remain untested so thresholds are set
      // conservatively to avoid CI flap from V8 coverage variance.
      thresholds: {
        lines: 55,
        functions: 55,
        branches: 40,
        statements: 55
      }
    }
  }
});