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

// GET /api/highlights?locale=en - Get all highlights for user
// POST /api/highlights?locale=en - Create new highlight
export async function GET(req: NextRequest) {
  try {
    const authHeader = req.headers.get('authorization')
    if (!authHeader) {
      return NextResponse.json({ success: false, error: 'Unauthorized' }, { status: 401 })
    }

    const token = authHeader.replace('Bearer ', '')
    const decoded = await verifyToken(token)
    if (!decoded) {
      return NextResponse.json({ success: false, error: 'Invalid token' }, { status: 401 })
    }

    const highlights = await prisma.highlight.findMany({
      where: { userId: decoded.userId },
      orderBy: { createdAt: 'desc' }
    })

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

export async function POST(req: NextRequest) {
  try {
    const authHeader = req.headers.get('authorization')
    if (!authHeader) {
      return NextResponse.json({ success: false, error: 'Unauthorized' }, { status: 401 })
    }

    const token = authHeader.replace('Bearer ', '')
    const decoded = await verifyToken(token)
    if (!decoded) {
      return NextResponse.json({ success: false, error: 'Invalid token' }, { status: 401 })
    }

    const body = await req.json()
    const { verseId, color, note, tags } = body

    if (!verseId || !color) {
      return NextResponse.json({ success: false, error: 'Missing required fields' }, { status: 400 })
    }

    // Check if highlight already exists
    const existingHighlight = await prisma.highlight.findUnique({
      where: {
        userId_verseId: {
          userId: decoded.userId,
          verseId
        }
      }
    })

    if (existingHighlight) {
      return NextResponse.json({ success: false, error: 'Highlight already exists' }, { status: 400 })
    }

    const highlight = await prisma.highlight.create({
      data: {
        userId: decoded.userId,
        verseId,
        color,
        note,
        tags: tags || []
      }
    })

    return NextResponse.json({ success: true, highlight })
  } catch (error) {
    console.error('Error creating highlight:', error)
    return NextResponse.json({ success: false, error: 'Failed to create highlight' }, { status: 500 })
  }
}
