/**
 * Command: validate — 校验 manifest.json 完整性
 * Command: validate-account — 校验账号目录完整性
 */

const fs = require('fs')
const path = require('path')
const { loadManifest, ACCOUNTS_DIR } = require('./pipeline-utils')

function validateManifest(manifestPath) {
  const issues = []

  if (!fs.existsSync(manifestPath)) {
    console.error(`错误: manifest 不存在: ${manifestPath}`)
    process.exit(1)
  }

  let manifest
  try {
    manifest = loadManifest(manifestPath)
  } catch (e) {
    console.error(`错误: JSON 解析失败: ${e.message}`)
    process.exit(1)
  }

  if (!manifest.account) issues.push('缺少顶层 account')
  if (!manifest.imageModel) issues.push('缺少顶层 imageModel（可选: gemini, mj）')
  if (!manifest.format) issues.push('缺少顶层 format（如 9:16）')
  if (!manifest.items || !Array.isArray(manifest.items)) issues.push('缺少顶层 items 数组')
  if (!manifest.mode) issues.push('缺少顶层 mode（single 或 framePair）')

  if (manifest.items && Array.isArray(manifest.items)) {
    manifest.items.forEach((item, i) => {
      const prefix = `items[${i}]`
      if (!item.narration && !item.text) issues.push(`${prefix} 缺少 narration 或 text（中文旁白）`)
      if (!item.shotDesc) issues.push(`${prefix} 缺少 shotDesc（分镜描述）`)
      if (!item.imagePrompt) issues.push(`${prefix} 缺少 imagePrompt`)
      if (manifest.mode === 'framePair' && !item.lastFramePrompt) {
        issues.push(`${prefix} 首尾帧模式缺少 lastFramePrompt（imagePrompt 作为第一帧）`)
      }
      if (item.status && !['pending', 'generating', 'done', 'failed'].includes(item.status)) {
        issues.push(`${prefix} status 无效: ${item.status}`)
      }
    })
  }

  if (issues.length === 0) {
    console.log(`✓ Manifest 校验通过: ${manifestPath}`)
    console.log(`  ${manifest.items?.length || 0} items, account=${manifest.account}, mode=${manifest.mode}`)
  } else {
    console.error(`✗ 发现 ${issues.length} 个问题:`)
    issues.forEach(issue => console.error(`  - ${issue}`))
    process.exit(1)
  }
}

function validateAccount(accountId) {
  const issues = []
  const accountDir = path.join(ACCOUNTS_DIR, accountId)

  if (!fs.existsSync(accountDir)) { console.error(`错误: 账号不存在: ${accountDir}`); process.exit(1) }

  const accountPath = path.join(accountDir, 'account.json')
  if (!fs.existsSync(accountPath)) { console.error('错误: 缺少 account.json'); process.exit(1) }

  let config
  try { config = JSON.parse(fs.readFileSync(accountPath, 'utf-8')) }
  catch (e) { console.error(`错误: JSON 解析失败: ${e.message}`); process.exit(1) }

  if (config.id !== accountId) issues.push(`id 不匹配: json="${config.id}" vs 目录="${accountId}"`)
  if (!config.name) issues.push('缺少 name')
  if (!config.imageModel) issues.push('缺少 imageModel')
  if (!config.defaultFormat) issues.push('缺少 defaultFormat')

  // 检查 prompts 文件
  const promptFiles = [
    { field: 'storyboardPrompt', label: '分镜' },
    { field: 'imageStylePrompt', label: '图片提示词' },
    { field: 'videoStylePrompt', label: '视频提示词' },
  ]
  for (const { field, label } of promptFiles) {
    const relPath = config[field]
    if (!relPath) {
      issues.push(`缺少 ${field}（prompts 路径）`)
    } else {
      const absPath = path.join(accountDir, relPath)
      if (!fs.existsSync(absPath)) {
        issues.push(`${label}文件不存在: ${relPath}`)
      }
    }
  }

  const refDir = path.join(accountDir, 'references')
  const localRefs = fs.existsSync(refDir)
    ? fs.readdirSync(refDir).filter(f => /\.(png|jpg|jpeg|webp)$/i.test(f))
    : []
  const topRefs = config.references || []
  if (localRefs.length === 0 && topRefs.length === 0) {
    issues.push('无参考图（建议至少 1 张）')
  }
  for (const ref of topRefs) {
    if (!ref.url) issues.push(`参考图 ${ref.file} 缺少 url（未上传 OSS）`)
  }

  if (issues.length === 0) {
    console.log(`✓ 账号校验通过: ${accountId}`)
    console.log(`  ${config.name}, 模型: ${config.imageModel}+${config.videoModel || '(未指定)'}`)
    console.log(`  参考图: ${localRefs.length} 本地, ${topRefs.length} 已上传`)
  } else {
    console.error(`✗ 发现 ${issues.length} 个问题:`)
    issues.forEach(i => console.error(`  - ${i}`))
    process.exit(1)
  }
}

module.exports = { validateManifest, validateAccount }