import { defineConfig } from 'vitest/config';

// Under CI the job-level env already sets DB_NAME=familysync and DB_HOST=mariadb
// (the ephemeral service container). Do not override those — CI provisions and
// migrates its own DB via the db:migrate step (T-ndv-04).
// Locally, force workers to connect to the isolated test DB so the dev
// `familysync` DB is never mutated by the test suite (T-ndv-02).
const isCI = !!process.env.CI;

export default defineConfig({
  test: {
    environment: 'node',
    globals: true,
    globalSetup: ['./test/global-setup.ts'],
    setupFiles: ['./test/setup.ts'],
    // Disable parallel file execution so concurrent DB tests do not interfere
    // via the shared MariaDB. The global afterEach in test/setup.ts truncates
    // list tables; running test files in parallel causes FK violations when one
    // file's afterEach deletes rows that another file's test is still using.
    fileParallelism: false,
    env: isCI
      ? {}
      : {
          DB_NAME: 'familysync_test',
          DB_HOST: process.env.DB_HOST ?? '127.0.0.1',
        },
  },
});