import path from 'path'
import { promises as fs } from 'fs'
import { HeadBucketCommand, S3Client } from '@aws-sdk/client-s3'
import {
  importHistoryMaterials,
  resolveImportOperator,
  type HistoryImportRecord,
} from '@/lib/history-material-import'
import { prisma } from '@/lib/prisma'
import {
  assertRemoteUploadSyncAccess,
  getRemoteUploadSyncConfig,
} from '@/lib/remote-upload-sync'

function getDatabaseHost() {
  const rawUrl = String(process.env.DATABASE_URL || '').trim()
  if (!rawUrl) {
    return ''
  }

  try {
    return new URL(rawUrl).hostname
  } catch {
    return ''
  }
}

function assertApplyEnvironment() {
  const databaseHost = getDatabaseHost()
  const s3Bucket = String(process.env.S3_BUCKET || '').trim()
  const s3Endpoint = String(process.env.S3_ENDPOINT || '').trim().replace(/\/+$/, '')
  const s3PublicDomain = String(process.env.S3_PUBLIC_DOMAIN || '').trim()
  const s3FilePath = String(process.env.S3_FILE_PATH || '').trim().replace(/\\/g, '/')
  const uploadDir = String(process.env.UPLOAD_DIR || '').trim()
  const remoteUploadSyncConfig = getRemoteUploadSyncConfig()

  const isProductionDatabase = databaseHost === '192.168.58.20'
  const isExpectedEndpoint = s3Endpoint === 'http://192.168.58.20:9000'
  const isExpectedPreviewBucket =
    s3Bucket === 'gongxiangpan' &&
    /^https:\/\/s3\.jiansun\.vip\/gongxiangpan\/?$/i.test(s3PublicDomain)
  const isExpectedFilePath = s3FilePath === '由壹点AI/'

  if (!isExpectedEndpoint || !isExpectedPreviewBucket || !isExpectedFilePath) {
    throw new Error(
      [
        '正式导入环境不正确：预览文件必须写入新桶 gongxiangpan 的正确前缀。',
        `当前 S3_ENDPOINT=${s3Endpoint || '(empty)'}`,
        `当前 S3_BUCKET=${s3Bucket || '(empty)'}`,
        `当前 S3_PUBLIC_DOMAIN=${s3PublicDomain || '(empty)'}`,
        `当前 S3_FILE_PATH=${s3FilePath || '(empty)'}`,
      ].join('\n'),
    )
  }

  if (isProductionDatabase && process.platform === 'win32' && !remoteUploadSyncConfig) {
    throw new Error(
      [
        '正式导入环境不正确：当前是 Windows 工作站，但 DATABASE_URL 指向生产库。',
        '直接导入会把下载 zip / PSD 源文件写到本机 uploads，生产站点无法下载。',
        '如确需在 Windows 读取 Z 盘源文件并写生产库，必须配置远程 uploads 同步：',
        'HISTORY_IMPORT_REMOTE_UPLOADS_HOST=prod',
        'HISTORY_IMPORT_REMOTE_UPLOADS_DIR=/mnt/PoolOne/youyidian-uploads',
        `当前 UPLOAD_DIR=${uploadDir || '(empty)'}`,
      ].join('\n'),
    )
  }
}

async function assertApplyStorageAccess() {
  const s3Endpoint = String(process.env.S3_ENDPOINT || '').trim()
  const s3Bucket = String(process.env.S3_BUCKET || '').trim()
  const accessKeyId = String(process.env.S3_ACCESS_KEY_ID || '').trim()
  const secretAccessKey = String(process.env.S3_SECRET_ACCESS_KEY || '').trim()

  if (!accessKeyId || !secretAccessKey) {
    throw new Error('正式导入环境不正确：缺少 S3 访问凭据，不能验证新桶写入权限。')
  }

  const client = new S3Client({
    endpoint: s3Endpoint,
    region: process.env.S3_REGION || 'us-east-1',
    credentials: {
      accessKeyId,
      secretAccessKey,
    },
    forcePathStyle: String(process.env.S3_ENABLE_PATH_STYLE || '').trim() !== '0',
  })

  try {
    await client.send(new HeadBucketCommand({ Bucket: s3Bucket }))
  } catch (error) {
    const statusCode = (error as { $metadata?: { httpStatusCode?: number } }).$metadata?.httpStatusCode
    throw new Error(
      [
        '正式导入环境不正确：当前 S3 凭据无法访问新桶，已阻止写入数据库。',
        `S3_BUCKET=${s3Bucket || '(empty)'}`,
        `S3_ENDPOINT=${s3Endpoint || '(empty)'}`,
        `HTTP_STATUS=${statusCode || 'unknown'}`,
      ].join('\n'),
    )
  }
}

function parseArgs() {
  const args = process.argv.slice(2)
  const getArg = (name: string) => {
    const match = args.find((arg) => arg.startsWith(`--${name}=`))
    return match ? match.slice(name.length + 3) : ''
  }

  const input = getArg('input')
  const operator = getArg('operator')
  const limitRaw = getArg('limit')
  const apply = args.includes('--apply')

  if (!input) {
    throw new Error('缺少 --input=扫描结果文件')
  }
  if (!operator) {
    throw new Error('缺少 --operator=用户名/邮箱/姓名')
  }

  return {
    input,
    operator,
    apply,
    limit: limitRaw ? Number(limitRaw) : undefined,
  }
}

async function main() {
  const options = parseArgs()
  if (options.apply) {
    assertApplyEnvironment()
    await assertApplyStorageAccess()
    await assertRemoteUploadSyncAccess()
  }

  const raw = await fs.readFile(options.input, 'utf8')
  const records = JSON.parse(raw) as HistoryImportRecord[]
  const operator = await resolveImportOperator(options.operator)

  console.log('历史素材导入开始')
  console.log(`- 输入文件: ${options.input}`)
  console.log(`- 执行人: ${operator.realName || operator.username}`)
  console.log(`- 模式: ${options.apply ? '正式导入' : '仅演练'}`)

  const results = await importHistoryMaterials({
    records,
    operator,
    apply: options.apply,
    limit: options.limit,
  })

  const outputPath = path.join(
    path.dirname(options.input),
    `history-material-import-result-${Date.now()}.json`,
  )
  await fs.writeFile(outputPath, JSON.stringify(results, null, 2), 'utf8')

  const summary = results.reduce(
    (acc, item) => {
      acc.total += 1
      acc[item.status] += 1
      return acc
    },
    { total: 0, imported: 0, dry_run: 0, skipped: 0, failed: 0 } as Record<string, number>,
  )

  console.log('\n导入完成')
  console.log(`- 总处理数: ${summary.total}`)
  console.log(`- 已导入: ${summary.imported}`)
  console.log(`- 演练记录: ${summary.dry_run}`)
  console.log(`- 已跳过: ${summary.skipped}`)
  console.log(`- 失败: ${summary.failed}`)
  console.log(`- 输出文件: ${outputPath}`)
  console.table(results.slice(0, 12))
}

main()
  .catch((error) => {
    console.error('历史素材导入失败:', error)
    process.exitCode = 1
  })
  .finally(async () => {
    await prisma.$disconnect()
    process.exit(process.exitCode ?? 0)
  })