import { mkdtempSync, writeFileSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { describe, expect, it } from 'vitest'
// @ts-expect-error — .mjs без типов
import { checkBudget } from '../../../scripts/ci/web-budget.mjs'

function dist(files: Record<string, string>): string {
  const dir = mkdtempSync(join(tmpdir(), 'web-budget-'))
  for (const [name, body] of Object.entries(files)) {
    writeFileSync(join(dir, name), body)
  }
  return dir
}

describe('web-budget', () => {
  it('в бюджете → без ошибок', () => {
    const dir = dist({ 'index-abc.js': 'a'.repeat(100), 'x-1.js': 'b'.repeat(100) })
    const { errors, sizes } = checkBudget(dir, { entryGz: 1000, totalGz: 2000 })
    expect(errors).toEqual([])
    expect(sizes.entryGz).toBeGreaterThan(0)
  })

  it('превышение entry и total → ошибки', () => {
    const noise = Array.from({ length: 5000 }, (_, i) => `v${i}=${Math.random()}`).join(';')
    const dir = dist({ 'index-abc.js': noise })
    const { errors } = checkBudget(dir, { entryGz: 10, totalGz: 10 })
    expect(errors).toHaveLength(2)
  })

  it('нет entry-чанка → ошибка', () => {
    const dir = dist({ 'other.js': 'x' })
    expect(checkBudget(dir).errors[0]).toMatch(/entry chunk/)
  })
})