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

// GET: List all icons with their tenant-specific active status
export async function GET() {
  try {
    const user = await getSession()
    if (!user) return NextResponse.json({ error: 'Nicht autorisiert' }, { status: 401 })
    if (user.role !== 'TENANT_ADMIN' && user.role !== 'SERVER_ADMIN') {
      return NextResponse.json({ error: 'Keine Berechtigung' }, { status: 403 })
    }

    const tenantId = user.tenantId
    if (!tenantId) return NextResponse.json({ error: 'Kein Mandant zugeordnet' }, { status: 400 })

    // Get all system icons (active ones)
    const icons = await (prisma as any).iconAsset.findMany({
      where: { isActive: true },
      include: { category: { select: { id: true, name: true } } },
      orderBy: [{ category: { sortOrder: 'asc' } }, { name: 'asc' }],
    })

    // Get tenant-specific overrides
    const overrides = await (prisma as any).tenantSymbol.findMany({
      where: { tenantId },
    })

    const overrideMap = new Map(overrides.map((o: any) => [o.iconId, o.isActive]))

    // Merge: default is active (true) unless override says otherwise
    const symbols = icons.map((icon: any) => ({
      id: icon.id,
      name: icon.name,
      fileKey: icon.fileKey,
      mimeType: icon.mimeType,
      iconType: icon.iconType,
      categoryId: icon.categoryId,
      categoryName: icon.category?.name || 'Ohne Kategorie',
      isActive: overrideMap.has(icon.id) ? overrideMap.get(icon.id) : true,
    }))

    return NextResponse.json({ symbols })
  } catch (error) {
    console.error('Error fetching tenant symbols:', error)
    return NextResponse.json({ error: 'Interner Fehler' }, { status: 500 })
  }
}

// PATCH: Update symbol visibility for the tenant (bulk)
export async function PATCH(req: NextRequest) {
  try {
    const user = await getSession()
    if (!user) return NextResponse.json({ error: 'Nicht autorisiert' }, { status: 401 })
    if (user.role !== 'TENANT_ADMIN' && user.role !== 'SERVER_ADMIN') {
      return NextResponse.json({ error: 'Keine Berechtigung' }, { status: 403 })
    }

    const tenantId = user.tenantId
    if (!tenantId) return NextResponse.json({ error: 'Kein Mandant zugeordnet' }, { status: 400 })

    const { updates } = await req.json()
    if (!Array.isArray(updates)) {
      return NextResponse.json({ error: 'updates Array erforderlich' }, { status: 400 })
    }

    // Upsert each symbol override
    await Promise.all(
      updates.map((u: { iconId: string; isActive: boolean }) =>
        (prisma as any).tenantSymbol.upsert({
          where: { tenantId_iconId: { tenantId, iconId: u.iconId } },
          update: { isActive: u.isActive },
          create: { tenantId, iconId: u.iconId, isActive: u.isActive },
        })
      )
    )

    return NextResponse.json({ success: true })
  } catch (error) {
    console.error('Error updating tenant symbols:', error)
    return NextResponse.json({ error: 'Interner Fehler' }, { status: 500 })
  }
}