import { z } from "zod";
import { ChatSDKError } from "@/lib/errors";
import { listRecentDingTalkNotificationTasks } from "@/lib/jobs/dingtalk-notification-job";
import { requireAdmin } from "@/lib/middleware/admin";
import { db } from "@/lib/db";
import { dingTalkNotificationTask } from "@/lib/db/schema";

const createTaskSchema = z.object({
  title: z.string().trim().min(1, "通知标题不能为空").max(100, "通知标题过长"),
  content: z
    .string()
    .trim()
    .min(1, "通知内容不能为空")
    .max(20000, "通知内容过长"),
  scheduledAt: z.string().trim().min(1, "请选择发送时间"),
});

function parseFutureSchedule(value: string) {
  const scheduledAt = new Date(value);

  if (Number.isNaN(scheduledAt.getTime())) {
    throw new Error("定时发送时间格式不正确");
  }

  if (scheduledAt.getTime() <= Date.now()) {
    throw new Error("定时发送时间必须晚于当前时间");
  }

  return scheduledAt;
}

export async function GET(request: Request) {
  try {
    await requireAdmin();

    const { searchParams } = new URL(request.url);
    const limitParam = Number.parseInt(searchParams.get("limit") || "30", 10);
    const limit = Number.isFinite(limitParam)
      ? Math.max(1, Math.min(100, limitParam))
      : 30;

    const tasks = await listRecentDingTalkNotificationTasks(limit);

    return Response.json({ tasks });
  } catch (error) {
    if (error instanceof ChatSDKError) {
      return error.toResponse();
    }

    return Response.json(
      { error: "获取钉钉通知任务失败" },
      { status: 500 },
    );
  }
}

export async function POST(request: Request) {
  try {
    const session = await requireAdmin();
    const body = createTaskSchema.parse(await request.json());
    const scheduledAt = parseFutureSchedule(body.scheduledAt);

    const [task] = await db
      .insert(dingTalkNotificationTask)
      .values({
        title: body.title,
        content: body.content,
        status: "pending",
        scheduledAt,
        createdBy: session.user.id,
        createdAt: new Date(),
        updatedAt: new Date(),
      })
      .returning();

    return Response.json({
      success: true,
      task,
    });
  } catch (error) {
    if (error instanceof ChatSDKError) {
      return error.toResponse();
    }

    if (error instanceof z.ZodError) {
      return Response.json(
        { success: false, error: error.issues[0]?.message || "参数校验失败" },
        { status: 400 },
      );
    }

    return Response.json(
      {
        success: false,
        error:
          error instanceof Error ? error.message : "创建钉钉通知任务失败",
      },
      { status: 500 },
    );
  }
}