import { NextRequest, NextResponse } from 'next/server'
import { auth } from '@/lib/auth'
import { errorDashboardService } from '@/lib/services/error-dashboard-service'

// GET /api/v1/admin/enterprise-clients/error-summary
// Get error summary for ALL clients (for main enterprise page widget)
export async function GET(request: NextRequest) {
  const session = await auth()
  if (!session || session.user.userType !== 'staff') {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  try {
    const summaries = await errorDashboardService.getAllClientsErrorSummary()

    // Calculate totals
    const totals = summaries.reduce(
      (acc, client) => ({
        criticalErrors24h: acc.criticalErrors24h + client.criticalErrors24h,
        totalErrors24h: acc.totalErrors24h + client.totalErrors24h,
        crashes24h: acc.crashes24h + client.crashes24h,
        clientsWithIssues: acc.clientsWithIssues + (client.criticalErrors24h > 0 || client.crashes24h > 0 ? 1 : 0),
      }),
      { criticalErrors24h: 0, totalErrors24h: 0, crashes24h: 0, clientsWithIssues: 0 }
    )

    // Calculate overall trend
    const increasingCount = summaries.filter(s => s.errorTrend === 'increasing').length
    const decreasingCount = summaries.filter(s => s.errorTrend === 'decreasing').length
    let overallTrend: 'increasing' | 'decreasing' | 'stable' = 'stable'
    if (increasingCount > decreasingCount) {
      overallTrend = 'increasing'
    } else if (decreasingCount > increasingCount) {
      overallTrend = 'decreasing'
    }

    return NextResponse.json({
      clients: summaries,
      totals: {
        ...totals,
        overallTrend,
        totalClients: summaries.length,
      },
    })
  } catch (error) {
    console.error('Failed to get error summary:', error)
    return NextResponse.json(
      { error: 'Failed to get error summary' },
      { status: 500 }
    )
  }
}