import { NextRequest, NextResponse } from 'next/server'
import { authMiddleware } from '@/lib/auth-middleware'
import connectDB from '@/lib/mongodb'
import { User as UserModel } from '@/models/user'
import BillingService from '@/lib/billing-service'

// GET endpoint to fetch user's billing statistics
export async function GET(request: NextRequest) {
  try {
    const user = await authMiddleware(request)
    if (!user) {
      return NextResponse.json(
        {
          success: false,
          error: { message: 'Authentication required', code: 'UNAUTHORIZED' },
        },
        { status: 401 }
      )
    }

    await connectDB()

    // Get user data
    const userData = await UserModel.findOne({ email: user.email })
    if (!userData) {
      return NextResponse.json(
        {
          success: false,
          error: { message: 'User not found', code: 'USER_NOT_FOUND' },
        },
        { status: 404 }
      )
    }

    // Get comprehensive billing statistics
    const stats = await BillingService.getBillingStats(user.email, user.id)
    const activeServices = await BillingService.getActiveServices(user.email, user.id)

    return NextResponse.json({
      success: true,
      data: {
        ...stats,
        activeServicesList: activeServices,
        currentBalance: userData.balance || 0,
      },
    })
  } catch (error) {
    console.error('Failed to fetch billing statistics:', error)
    return NextResponse.json(
      {
        success: false,
        error: { message: 'Failed to fetch billing statistics', code: 'INTERNAL_ERROR' },
      },
      { status: 500 }
    )
  }
}