import * as fs from 'fs'
import * as path from 'path'
import * as crypto from 'crypto'
import { test as baseTest } from '@playwright/test'

const istanbulCLIOutput = path.join(process.cwd(), '.nyc_output')

export function generateUUID(): string {
  return crypto.randomBytes(16).toString('hex')
}

export const test = baseTest.extend({
  context: async ({ context }, use) => {
    await context.addInitScript(() =>
      window.addEventListener('beforeunload', () =>
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        (window as any).collectIstanbulCoverage(
          JSON.stringify((window as any).__coverage__)
        )
      )
    )
    await fs.promises.mkdir(istanbulCLIOutput, { recursive: true })
    await context.exposeFunction(
      'collectIstanbulCoverage',
      (coverageJSON: string) => {
        if (coverageJSON)
          fs.writeFileSync(
            path.join(
              istanbulCLIOutput,
              `playwright_coverage_${generateUUID()}.json`
            ),
            coverageJSON
          )
      }
    )
    await use(context)
    for (const page of context.pages()) {
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      await page.evaluate(() =>
        (window as any).collectIstanbulCoverage(
          JSON.stringify((window as any).__coverage__)
        )
      )
    }
  },
})

export const expect = test.expect