import { NextResponse } from "next/server";
import { auth } from "@/app/(auth)/auth";
import {
  getCanvasLayoutReplaceBatchActiveTaskId,
  getCanvasLayoutReplaceBatchForUser,
  markCanvasLayoutReplaceBatchItemsAdded,
  retryCanvasLayoutReplaceBatchItem,
} from "@/lib/canvas/layout-replace-batch";
import {
  enqueueCanvasImageTask,
  ensureCanvasImageTaskActive,
} from "@/lib/canvas/image-task-queue";

function normalizeUuid(value: unknown) {
  const id = String(value || "").trim();
  return /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(id)
    ? id
    : "";
}

export async function GET(
  _request: Request,
  { params }: { params: Promise<{ batchId: string }> }
) {
  try {
    const session = await auth();
    if (!session?.user?.id) {
      return NextResponse.json({ success: false, error: "未登录" }, { status: 401 });
    }
    const batchId = normalizeUuid((await params).batchId);
    if (!batchId) {
      return NextResponse.json({ success: false, error: "批次ID无效" }, { status: 400 });
    }

    let batch = await getCanvasLayoutReplaceBatchForUser({
      batchId,
      userId: session.user.id,
    });
    if (!batch) {
      return NextResponse.json({ success: false, error: "批次不存在" }, { status: 404 });
    }
    const activeTaskId = getCanvasLayoutReplaceBatchActiveTaskId(batch);
    if (activeTaskId) {
      await ensureCanvasImageTaskActive({
        taskId: activeTaskId,
        userId: session.user.id,
      });
      batch = await getCanvasLayoutReplaceBatchForUser({
        batchId,
        userId: session.user.id,
      });
    }

    return NextResponse.json({ success: true, batch });
  } catch (error) {
    console.error("[Canvas Layout Replace Batch][Detail] Error:", error);
    return NextResponse.json(
      {
        success: false,
        error: error instanceof Error ? error.message : "查询批次失败",
      },
      { status: 500 }
    );
  }
}

export async function PATCH(
  request: Request,
  { params }: { params: Promise<{ batchId: string }> }
) {
  try {
    const session = await auth();
    if (!session?.user?.id) {
      return NextResponse.json({ success: false, error: "未登录" }, { status: 401 });
    }
    const batchId = normalizeUuid((await params).batchId);
    const body = await request.json().catch(() => ({}));
    if (body?.action === "retry") {
      const itemId = normalizeUuid(body?.itemId);
      if (!batchId || !itemId) {
        return NextResponse.json(
          { success: false, error: "缺少需要重试的结果" },
          { status: 400 }
        );
      }
      const taskId = await retryCanvasLayoutReplaceBatchItem({
        batchId,
        itemId,
        userId: session.user.id,
      });
      if (!taskId) {
        return NextResponse.json(
          { success: false, error: "该结果当前无法重试" },
          { status: 409 }
        );
      }
      await enqueueCanvasImageTask(taskId);
      return NextResponse.json({ success: true, taskId });
    }

    const items = Array.isArray(body?.items)
      ? body.items
          .map((item: unknown) => {
            const record =
              item && typeof item === "object" && !Array.isArray(item)
                ? (item as Record<string, unknown>)
                : {};
            return {
              itemId: normalizeUuid(record.itemId),
              canvasNodeId: String(record.canvasNodeId || "").trim(),
            };
          })
          .filter(
            (item: { itemId: string; canvasNodeId: string }) =>
              Boolean(item.itemId && item.canvasNodeId)
          )
      : [];
    if (!batchId || items.length === 0) {
      return NextResponse.json(
        { success: false, error: "缺少已添加的结果信息" },
        { status: 400 }
      );
    }
    const updated = await markCanvasLayoutReplaceBatchItemsAdded({
      batchId,
      userId: session.user.id,
      items,
    });
    if (!updated) {
      return NextResponse.json({ success: false, error: "批次不存在" }, { status: 404 });
    }
    return NextResponse.json({ success: true });
  } catch (error) {
    console.error("[Canvas Layout Replace Batch][PATCH] Error:", error);
    return NextResponse.json(
      {
        success: false,
        error: error instanceof Error ? error.message : "更新批次失败",
      },
      { status: 500 }
    );
  }
}