import { defineConfig } from 'vitest/config'
import react from '@vitejs/plugin-react'
import { resolve } from 'path'

export default defineConfig({
  plugins: [react()],
  resolve: {
    alias: {
      '@': resolve(__dirname, 'src'),
    },
  },
  test: {
    globals: true,
    environment: 'jsdom',
    setupFiles: ['./tests/setup.ts'],
    coverage: {
      provider: 'v8',
      reporter: ['text', 'lcov'],
      // Thresholds set as a regression ratchet to prevent coverage from dropping.
      // Measured: lines 96.52%, functions 91.08%, statements 96.52%, branches 86.78%.
      // Set ~1-2pp below measured to catch real regressions without false positives.
      // Branches set conservatively (85) as it's the weakest metric.
      thresholds: {
        lines: 95,
        functions: 89,
        branches: 85,
        statements: 95,
      },
      include: ['src/**/*.{ts,tsx}'],
      exclude: [
        'src/main.tsx',
        'src/vite-env.d.ts',
        'src/types/**',
        '**/*.test.ts',
        '**/*.test.tsx',
      ],
    },
  },
})