import { NextRequest, NextResponse } from 'next/server'
import { auth } from '@/auth'
import { prisma } from '@/lib/prisma'

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const session = await auth()
    
    if (!session?.user?.id) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }

    const { id } = await params

    const order = await prisma.order.findFirst({
      where: {
        id,
        userId: session.user.id
      },
      include: {
        orderItems: {
          include: {
            product: {
              select: {
                id: true,
                name: true,
                images: true,
                discount: true,
                sku: true
              }
            }
          }
        },
        user: {
          select: {
            name: true,
            email: true
          }
        }
      }
    })

    if (!order) {
      return NextResponse.json({ error: 'Order not found' }, { status: 404 })
    }

    return NextResponse.json(order)
  } catch (error) {
    console.error('Error fetching order:', error)
    return NextResponse.json(
      { error: 'Failed to fetch order' },
      { status: 500 }
    )
  }
}

export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const session = await auth()
    
    if (!session?.user?.id) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }

    const { id } = await params
    const { status } = await request.json()

    // Only allow cancellation of pending orders
    if (status === 'CANCELLED') {
      const order = await prisma.order.findFirst({
        where: {
          id,
          userId: session.user.id,
          status: 'PENDING'
        }
      })

      if (!order) {
        return NextResponse.json(
          { error: 'Order not found or cannot be cancelled' },
          { status: 400 }
        )
      }

      const updatedOrder = await prisma.order.update({
        where: { id },
        data: { status: 'CANCELLED' }
      })

      return NextResponse.json(updatedOrder)
    }

    return NextResponse.json(
      { error: 'Invalid status update' },
      { status: 400 }
    )
  } catch (error) {
    console.error('Error updating order:', error)
    return NextResponse.json(
      { error: 'Failed to update order' },
      { status: 500 }
    )
  }
}