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

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ slug: string }> }
) {
  try {
    const { slug } = await params
    const { searchParams } = new URL(request.url)
    const limit = parseInt(searchParams.get('limit') || '50')

    const genre = await prisma.genre.findUnique({
      where: { slug },
    })

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

    const songGenres = await prisma.songGenre.findMany({
      where: {
        genreId: genre.id,
        song: {
          isPublic: true,
        },
      },
      include: {
        song: {
          include: {
            artist: {
              select: {
                id: true,
                name: true,
                slug: true,
                avatarUrl: true,
                verified: true,
              },
            },
            album: {
              select: {
                id: true,
                title: true,
                slug: true,
                coverUrl: true,
              },
            },
            genres: {
              include: {
                genre: true,
              },
            },
          },
        },
      },
      take: limit,
      orderBy: {
        song: {
          createdAt: 'desc',
        },
      },
    })

    const songs = songGenres.map((sg: (typeof songGenres)[number]) => sg.song)

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