import 'dotenv/config'
import path from 'node:path'
import { discoverDecks, validateDeck, type ValidationIssue } from './lib/content.ts'
import { loadProjectConfig, type EasySlidesConfig } from './lib/config.ts'
import { formatStaticOverflowResult } from './lib/overflow-report.ts'
import { auditStaticDecks } from './lib/static-overflow.ts'
import { hasPresenterToken } from './lib/token.ts'

export async function checkProject(cwd = process.cwd(), providedConfig?: EasySlidesConfig) {
  const config = providedConfig ?? await loadProjectConfig(cwd)
  const decks = await discoverDecks(cwd, config.slidesDir)
  const issues: ValidationIssue[] = []

  if (decks.length === 0)
    issues.push({ level: 'error', file: path.join(cwd, config.slidesDir), message: `没有发现 ${config.slidesDir}/<slug>/slides.md` })

  for (const deck of decks)
    issues.push(...await validateDeck(deck))

  const staticOverflow = await auditStaticDecks(decks)

  if (!hasPresenterToken()) {
    issues.push({
      level: 'warning',
      file: path.join(cwd, '.env'),
      message: '未设置 PRESENTER_TOKEN；生产构建将隐藏演示者入口',
    })
  }

  return { config, decks, issues, staticOverflow }
}

export function printIssues(issues: ValidationIssue[], cwd = process.cwd()) {
  for (const issue of issues) {
    const marker = issue.level === 'error' ? 'ERROR' : 'WARN '
    console.log(`${marker} ${path.relative(cwd, issue.file)}: ${issue.message}`)
  }
}

export async function runCheck() {
  const result = await checkProject()
  printIssues(result.issues)
  formatStaticOverflowResult(result.staticOverflow).forEach(line => console.log(line))
  const errors = result.issues.filter(issue => issue.level === 'error')
  if (errors.length > 0) {
    console.error(`\n检查失败：${errors.length} 个错误`)
    process.exitCode = 1
    return
  }

  const warnings = result.issues.filter(issue => issue.level === 'warning').length
    + result.staticOverflow.issues.length
    + result.staticOverflow.errors.length
  console.log(`\n检查通过：${result.decks.length} 套演示，${warnings} 个警告`)
}

if (import.meta.url === new URL(process.argv[1], 'file:').href)
  await runCheck()