/**
 * Sync All Comments Job
 *
 * Synchronisiert Kommentare für alle aktiven YouTube-Accounts.
 * Kann als Cron-Job oder manuell ausgeführt werden.
 */

import { getPayload, Payload } from 'payload'
import config from '@payload-config'
import { refreshAccessToken, isTokenExpired } from '@/lib/integrations/youtube/oauth'

interface SocialAccount {
  id: number
  displayName?: string
  isActive?: boolean
  externalId?: string
  credentials?: {
    accessToken?: string
    refreshToken?: string
    tokenExpiresAt?: string
  }
  syncSettings?: {
    autoSyncEnabled?: boolean
    syncIntervalMinutes?: number
    syncComments?: boolean
  }
  stats?: {
    lastSyncedAt?: string
  }
}

interface SyncResult {
  accountId: number
  displayName: string
  success: boolean
  created: number
  updated: number
  errors: string[]
}

/**
 * Führt den Comment-Sync für alle aktiven Accounts durch
 */
export async function runSyncAllCommentsJob(payload: Payload): Promise<{
  totalAccounts: number
  successfulSyncs: number
  totalNew: number
  totalUpdated: number
  errors: string[]
}> {
  console.log('🔄 Starting scheduled comment sync...')
  console.log(`   Time: ${new Date().toISOString()}`)

  // Aktive Accounts mit Auto-Sync laden
  const accounts = await payload.find({
    collection: 'social-accounts',
    where: {
      and: [
        { isActive: { equals: true } },
        { 'syncSettings.autoSyncEnabled': { equals: true } },
        { 'credentials.accessToken': { exists: true } },
      ],
    },
    limit: 100,
    depth: 2,
  })

  console.log(`📊 Found ${accounts.docs.length} accounts to sync`)

  let totalNew = 0
  let totalUpdated = 0
  let successfulSyncs = 0
  const errors: string[] = []
  const results: SyncResult[] = []

  for (const doc of accounts.docs) {
    const account = doc as unknown as SocialAccount

    try {
      console.log(`\n📺 Syncing: ${account.displayName || account.id}`)

      // Token-Ablauf prüfen und ggf. erneuern
      if (isTokenExpired(account.credentials?.tokenExpiresAt)) {
        console.log('   ⏰ Token expired, refreshing...')

        if (!account.credentials?.refreshToken) {
          console.log('   ❌ No refresh token available')
          errors.push(`${account.displayName}: No refresh token available`)
          continue
        }

        try {
          const newCredentials = await refreshAccessToken(account.credentials.refreshToken)

          await payload.update({
            collection: 'social-accounts',
            id: account.id,
            data: {
              credentials: {
                accessToken: newCredentials.access_token || undefined,
                refreshToken: newCredentials.refresh_token || account.credentials.refreshToken,
                tokenExpiresAt: newCredentials.expiry_date
                  ? new Date(newCredentials.expiry_date).toISOString()
                  : undefined,
              },
            },
          })

          console.log('   ✅ Token refreshed')
        } catch (refreshError) {
          const msg = refreshError instanceof Error ? refreshError.message : 'Unknown error'
          console.error('   ❌ Token refresh failed:', msg)
          errors.push(`${account.displayName}: Token refresh failed - ${msg}`)
          continue
        }
      }

      // CommentsSyncService dynamisch importieren
      const { CommentsSyncService } = await import(
        '@/lib/integrations/youtube/CommentsSyncService'
      )
      const syncService = new CommentsSyncService(payload)

      const result = await syncService.syncCommentsForAccount(account.id, {
        maxComments: 100,
        analyzeWithAI: true,
      })

      const created = result.created || 0
      const updated = result.updated || 0

      totalNew += created
      totalUpdated += updated
      successfulSyncs++

      results.push({
        accountId: account.id,
        displayName: account.displayName || `Account ${account.id}`,
        success: true,
        created,
        updated,
        errors: result.errors || [],
      })

      console.log(`   ✅ New: ${created}, Updated: ${updated}`)

      if (result.errors?.length > 0) {
        errors.push(...result.errors.map((e: string) => `${account.displayName}: ${e}`))
      }
    } catch (accountError: unknown) {
      const msg = accountError instanceof Error ? accountError.message : 'Unknown error'
      console.error(`   ❌ Failed: ${msg}`)
      errors.push(`${account.displayName}: ${msg}`)

      results.push({
        accountId: account.id,
        displayName: account.displayName || `Account ${account.id}`,
        success: false,
        created: 0,
        updated: 0,
        errors: [msg],
      })
    }
  }

  // Zusammenfassung
  console.log('\n' + '='.repeat(50))
  console.log('📊 SYNC SUMMARY')
  console.log('='.repeat(50))
  console.log(`   Accounts processed: ${accounts.docs.length}`)
  console.log(`   Successful syncs: ${successfulSyncs}`)
  console.log(`   New comments: ${totalNew}`)
  console.log(`   Updated: ${totalUpdated}`)
  console.log(`   Errors: ${errors.length}`)

  if (errors.length > 0) {
    console.log('\n⚠️ Errors:')
    errors.forEach((e) => console.log(`   - ${e}`))
  }

  return {
    totalAccounts: accounts.docs.length,
    successfulSyncs,
    totalNew,
    totalUpdated,
    errors,
  }
}

/**
 * Standalone-Ausführung für Cron-Job
 */
async function main() {
  try {
    const payload = await getPayload({ config })
    await runSyncAllCommentsJob(payload)
    process.exit(0)
  } catch (error) {
    console.error('❌ Sync job failed:', error)
    process.exit(1)
  }
}

// Wenn direkt ausgeführt (nicht importiert)
if (require.main === module) {
  main()
}