import { NextRequest, NextResponse } from 'next/server'
import prisma from '@/lib/prisma'
import { auth } from '@/auth'
import { reconcileLabelsAfterNoteMove } from '@/app/actions/notes'

// POST /api/notes/[id]/move - Move a note to a notebook (or to Inbox)
export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  const session = await auth()
  if (!session?.user?.id) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  try {
    const { id } = await params
    const body = await request.json()
    const { notebookId } = body

    // Get the note
    const note = await prisma.note.findUnique({
      where: { id },
      select: {
        id: true,
        userId: true,
        notebookId: true
      }
    })

    if (!note) {
      return NextResponse.json(
        { success: false, error: 'Note not found' },
        { status: 404 }
      )
    }

    // Verify ownership
    if (note.userId !== session.user.id) {
      return NextResponse.json(
        { success: false, error: 'Forbidden' },
        { status: 403 }
      )
    }

    // If notebookId is provided, verify it exists and belongs to the user
    if (notebookId !== null && notebookId !== '') {
      const notebook = await prisma.notebook.findUnique({
        where: { id: notebookId },
        select: { userId: true }
      })

      if (!notebook || notebook.userId !== session.user.id) {
        return NextResponse.json(
          { success: false, error: 'Notebook not found or unauthorized' },
          { status: 403 }
        )
      }
    }

    // Update the note's notebook
    // notebookId = null or "" means move to Inbox (Notes générales)
    const targetNotebookId = notebookId && notebookId !== '' ? notebookId : null

    const updatedNote = await prisma.note.update({
      where: { id },
      data: {
        notebookId: targetNotebookId
      },
      include: {
        notebook: {
          select: { id: true, name: true }
        }
      }
    })

    await reconcileLabelsAfterNoteMove(id, targetNotebookId)

    // No revalidatePath('/') here — the client-side triggerRefresh() in
    // notebooks-context.tsx handles the refresh.  Avoiding server-side
    // revalidation prevents a double-refresh (server + client).

    return NextResponse.json({
      success: true,
      data: updatedNote,
      message: notebookId && notebookId !== ''
        ? `Note moved to "${updatedNote.notebook?.name || 'notebook'}"`
        : 'Note moved to Inbox'
    })
  } catch (error) {
    return NextResponse.json(
      { success: false, error: 'Failed to move note' },
      { status: 500 }
    )
  }
}
