import { existsSync, readFileSync } from 'node:fs'
import { resolve } from 'node:path'

/**
 * Minimal dependency-free `.env` loader for the E2E suite.
 *
 * Reads `tests/.env.test` (or `./.env.test`) if present and populates
 * `process.env` WITHOUT overriding values already provided by the real
 * environment — so `TEST_BASE_URL=... npx playwright test` still wins.
 */
export function loadTestEnv(): void {
  const candidates = [
    resolve(process.cwd(), 'tests/.env.test'),
    resolve(process.cwd(), '.env.test'),
  ]
  const file = candidates.find((candidate) => existsSync(candidate))
  if (!file) return

  const content = readFileSync(file, 'utf8')

  for (const rawLine of content.split(/\r?\n/)) {
    const line = rawLine.trim()
    if (!line || line.startsWith('#')) continue

    const separatorIndex = line.indexOf('=')
    if (separatorIndex === -1) continue

    const key = line.slice(0, separatorIndex).trim()
    if (!key) continue

    let value = line.slice(separatorIndex + 1).trim()
    if (
      (value.startsWith('"') && value.endsWith('"')) ||
      (value.startsWith("'") && value.endsWith("'"))
    ) {
      value = value.slice(1, -1)
    }

    if (process.env[key] === undefined) {
      process.env[key] = value
    }
  }
}