import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { reorderKanbanSchema } from "@/lib/validators";

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

    const project = await prisma.project.findUnique({ where: { id } });
    if (!project) {
      return NextResponse.json({ error: "Project not found" }, { status: 404 });
    }

    const body = await request.json();
    const result = reorderKanbanSchema.safeParse(body);

    if (!result.success) {
      return NextResponse.json(
        { error: "Validation failed", details: result.error.flatten() },
        { status: 400 }
      );
    }

    const updates = result.data.items.map((item) =>
      prisma.kanbanItem.update({
        where: { id: item.id },
        data: {
          column: item.column,
          sortOrder: item.sortOrder,
        },
      })
    );

    await prisma.$transaction(updates);

    return NextResponse.json({ success: true });
  } catch (error) {
    console.error("PATCH /api/projects/[id]/kanban/reorder error:", error);
    return NextResponse.json(
      { error: "Internal server error" },
      { status: 500 }
    );
  }
}