import { createClient } from '@/lib/supabase/server'
import { PrismaClient } from '@prisma/client'
import { NextRequest, NextResponse } from 'next/server'

const prisma = new PrismaClient()

// GET /api/chat/messages - Get messages for a stream
export async function GET(request: NextRequest) {
  try {
    const streamId = request.nextUrl.searchParams.get('streamId')

    if (!streamId) {
      return NextResponse.json(
        { error: 'Stream ID is required' },
        { status: 400 }
      )
    }

    const messages = await prisma.chatMessage.findMany({
      where: {
        streamId,
        isDeleted: false,
      },
      select: {
        id: true,
        message: true,
        badges: true,
        createdAt: true,
        user: {
          select: {
            id: true,
            displayName: true,
            avatarUrl: true,
            verified: true,
          },
        },
      },
      orderBy: { createdAt: 'asc' },
      take: 100, // Last 100 messages
    })

    return NextResponse.json({ messages }, { status: 200 })
  } catch (error) {
    console.error('Error fetching chat messages:', error)
    return NextResponse.json(
      { error: 'Failed to fetch messages' },
      { status: 500 }
    )
  }
}

// POST /api/chat/messages - Send a message
export async function POST(request: NextRequest) {
  const supabase = await createClient()
  const { data: { user: supabaseUser }, error: authError } = await supabase.auth.getUser()

  if (authError || !supabaseUser) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  try {
    const body = await request.json()
    const { streamId, message } = body

    // Validation
    if (!streamId || !message) {
      return NextResponse.json(
        { error: 'Stream ID and message are required' },
        { status: 400 }
      )
    }

    if (message.length > 500) {
      return NextResponse.json(
        { error: 'Message too long (max 500 characters)' },
        { status: 400 }
      )
    }

    // Get user
    const user = await prisma.user.findUnique({
      where: { supabaseId: supabaseUser.id },
    })

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

    // Create message
    const chatMessage = await prisma.chatMessage.create({
      data: {
        streamId,
        userId: user.id,
        message: message.trim(),
        badges: user.isCreator ? ['creator'] : [],
      },
      include: {
        user: {
          select: {
            id: true,
            displayName: true,
            avatarUrl: true,
            verified: true,
          },
        },
      },
    })

    return NextResponse.json(chatMessage, { status: 201 })
  } catch (error) {
    console.error('Error posting message:', error)
    return NextResponse.json(
      { error: 'Failed to post message' },
      { status: 500 }
    )
  }
}