import { readFileSync } from 'node:fs'
import { resolve } from 'node:path'
import * as yaml from 'js-yaml'
import { describe, expect, it } from 'vitest'

const root = resolve(import.meta.dirname, '..')
const runnerPrivatePnpmDestination = '${{ runner.temp }}/setup-pnpm'

describe('CI workflow', () => {
  it('isolates every pnpm action setup destination per runner', () => {
    const workflow: unknown = yaml.load(readFileSync(resolve(root, '.github/workflows/ci.yml'), 'utf8'))
    if (!isRecord(workflow) || !isRecord(workflow.jobs)) throw new TypeError('CI workflow must define jobs')

    const setups = Object.entries(workflow.jobs).flatMap(([jobName, job]) => {
      if (!isRecord(job) || !Array.isArray(job.steps)) return []
      return job.steps.flatMap((step) => {
        if (!isRecord(step) || typeof step.uses !== 'string' || !step.uses.startsWith('pnpm/action-setup@')) return []
        return [{ jobName, step }]
      })
    })

    expect(setups.length).toBeGreaterThan(0)
    for (const { jobName, step } of setups) {
      expect(step, `${jobName} must not share pnpm/action-setup's default destination`).toMatchObject({
        with: { dest: runnerPrivatePnpmDestination },
      })
    }
  })
})

function isRecord(value: unknown): value is Record<string, unknown> {
  return typeof value === 'object' && value !== null && !Array.isArray(value)
}