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

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params

    const album = await prisma.album.findUnique({
      where: { id },
      include: {
        artist: {
          select: {
            id: true,
            name: true,
            slug: true,
            avatarUrl: true,
            verified: true,
          },
        },
        songs: {
          include: {
            genres: {
              include: {
                genre: true,
              },
            },
          },
          orderBy: {
            createdAt: 'asc',
          },
        },
      },
    })

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

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

export async function PUT(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { artist } = await requireArtist()
    const { id } = await params

    const existingAlbum = await prisma.album.findUnique({
      where: { id },
    })

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

    if (existingAlbum.artistId !== artist.id) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 403 })
    }

    const body = await request.json()
    const { title, description, coverUrl, releaseDate, albumType } = body

    const updateData: any = {}
    if (title !== undefined) {
      updateData.title = title
      updateData.slug = slugify(title)
    }
    if (description !== undefined) updateData.description = description
    if (coverUrl !== undefined) updateData.coverUrl = coverUrl
    if (releaseDate !== undefined) updateData.releaseDate = releaseDate ? new Date(releaseDate) : null
    if (albumType !== undefined) updateData.albumType = albumType

    const updatedAlbum = await prisma.album.update({
      where: { id },
      data: updateData,
      include: {
        artist: {
          select: {
            id: true,
            name: true,
            slug: true,
            avatarUrl: true,
            verified: true,
          },
        },
        _count: {
          select: {
            songs: true,
          },
        },
      },
    })

    return NextResponse.json(updatedAlbum)
  } catch (error) {
    if (error instanceof Error && error.message === 'Unauthorized') {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }
    if (error instanceof Error && error.message === 'Artist profile required') {
      return NextResponse.json({ error: 'Artist profile required' }, { status: 403 })
    }
    console.error('Error updating album:', error)
    return NextResponse.json({ error: 'Failed to update album' }, { status: 500 })
  }
}

export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { artist } = await requireArtist()
    const { id } = await params

    const existingAlbum = await prisma.album.findUnique({
      where: { id },
    })

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

    if (existingAlbum.artistId !== artist.id) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 403 })
    }

    await prisma.album.delete({
      where: { id },
    })

    return NextResponse.json({ message: 'Album deleted successfully' })
  } catch (error) {
    if (error instanceof Error && error.message === 'Unauthorized') {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }
    if (error instanceof Error && error.message === 'Artist profile required') {
      return NextResponse.json({ error: 'Artist profile required' }, { status: 403 })
    }
    console.error('Error deleting album:', error)
    return NextResponse.json({ error: 'Failed to delete album' }, { status: 500 })
  }
}