import { Controller, Get, Post, Inject, Query, Body, Param } from "@midwayjs/core";
import { Context } from "@midwayjs/koa";
import { InjectRepository } from "@midwayjs/sequelize";
import { Repository } from "sequelize-typescript";
import { Op, UniqueConstraintError } from "sequelize";
import DeviceAlarm from "../entity/device_alarm.entity";
import AlarmDispatch from "../entity/alarm_dispatch.entity";
import Worker from "../entity/worker.entity";
import Customer from "../entity/customer.entity";
import SysUser from "../entity/sysUser.entity";
import { NoticeService } from "../service/notice.service";

@Controller("/api/device-alarms")
export class DeviceAlarmController {
	@Inject() ctx!: Context;
	@Inject() noticeService!: NoticeService;

	@InjectRepository(DeviceAlarm)
	alarmRepo!: Repository<DeviceAlarm>;

	@InjectRepository(AlarmDispatch)
	dispatchRepo!: Repository<AlarmDispatch>;

	@InjectRepository(Worker)
	workerRepo!: Repository<Worker>;

	@InjectRepository(Customer)
	customerRepo!: Repository<Customer>;

	@InjectRepository(SysUser)
	userRepo!: Repository<SysUser>;

	/** 报警分页列表（仅 line_id 非空的记录）+ 统计 */
	@Get("/") async list(@Query() query: any) {
		const page = Math.max(Number(query.page) || 1, 1);
		const rawPageSize = Number(query.pageSize) || 10;
		const pageSize = Math.min(Math.max(rawPageSize, 1), 200);

		const where: any = { lineId: { [Op.ne]: null } };
		if (query.customerId !== undefined && query.customerId !== "") where.customerId = Number(query.customerId);
		if (query.alarmGrade !== undefined && query.alarmGrade !== "") where.alarmGrade = Number(query.alarmGrade);
		if (query.keyword) {
			where[Op.or] = [
				{ lineName: { [Op.like]: `%${query.keyword}%` } },
				{ lineCode: { [Op.like]: `%${query.keyword}%` } },
				{ deviceName: { [Op.like]: `%${query.keyword}%` } }
			];
		}

		const { count, rows } = await this.alarmRepo.findAndCountAll({
			where,
			limit: pageSize,
			offset: (page - 1) * pageSize,
			order: [["alarmTime", "DESC"]]
		});

		// 统计：今日报警数（alarm_time >= 当天0点）/ 严重报警数（grade=1）/ 未派单数（无 status=0 派单）
		const d = new Date(new Date().getTime() + 8 * 60 * 60 * 1000);
		const today = `${d.getUTCFullYear()}-${String(d.getUTCMonth() + 1).padStart(2, "0")}-${String(d.getUTCDate()).padStart(2, "0")}`;
		const todayStart = new Date(`${today}T00:00:00+08:00`);
		const [todayCount, gradeOneCount] = await Promise.all([
			this.alarmRepo.count({ where: { lineId: { [Op.ne]: null }, alarmTime: { [Op.gte]: todayStart } } }),
			this.alarmRepo.count({ where: { lineId: { [Op.ne]: null }, alarmGrade: 1 } })
		]);
		const dispatchedAlarms = await this.dispatchRepo.findAll({ where: { status: 0 }, attributes: ["alarmId"], raw: true });
		const dispatchedIds = [...new Set(dispatchedAlarms.map((r: any) => Number(r.alarmId)))];
		const undispatchedCount = await this.alarmRepo.count({
			where: {
				lineId: { [Op.ne]: null },
				id: dispatchedIds.length ? { [Op.notIn]: dispatchedIds } : { [Op.ne]: null }
			}
		});

		return {
			code: 200,
			message: "获取报警列表成功",
			data: {
				list: rows.map((r) => r.toJSON()),
				total: count,
				page,
				pageSize,
				summary: { todayCount, gradeOneCount, undispatchedCount }
			}
		};
	}

	/** 发起派单：校验报警/未完成派单/电工，生成派单号，写入派单并给电工发站内通知 */
	@Post("/:id/dispatch") async dispatch(@Param("id") id: string, @Body() body: any) {
		const alarmId = Number(id);
		if (!alarmId || Number.isNaN(alarmId)) return { code: 400, message: "缺少有效的报警 ID", data: null };

		const alarm = await this.alarmRepo.findByPk(alarmId);
		if (!alarm) return { code: 404, message: "报警记录不存在", data: null };
		if (!alarm.lineId) return { code: 400, message: "该报警未关联线路，无法派单", data: null };

		const existing = await this.dispatchRepo.findOne({ where: { alarmId, status: 0 } });
		if (existing) return { code: 400, message: "该报警已有未完成的派单", data: null };

		const workerId = Number(body.workerId);
		if (!workerId || Number.isNaN(workerId)) return { code: 400, message: "缺少有效的 workerId 参数", data: null };
		const worker = await this.workerRepo.findByPk(workerId);
		if (!worker) return { code: 400, message: "共享电工不存在", data: null };
		if (Number(worker.status) !== 1) return { code: 400, message: "该电工不在岗，无法派单", data: null };
		if (Number(worker.auditStatus) !== 1) return { code: 400, message: "该电工审核未通过，无法派单", data: null };

		// 派发人：当前登录用户 realName（缺失时回退 username）
		const loginUserId = (this.ctx.state.user as any)?.userId;
		const loginUser = loginUserId ? await this.userRepo.findByPk(loginUserId, { attributes: ["realName", "username"] }) : null;
		const dispatcher = loginUser?.realName || (loginUser as any)?.username || "未知";

		// 客户名称（通知文案用，查不到时回退客户 ID）
		let customerName = `#${alarm.customerId}`;
		if (alarm.customerId) {
			const customer = await this.customerRepo.findByPk(alarm.customerId, { attributes: ["customerName"] });
			if (customer) customerName = customer.customerName;
		}

		const payload: any = {
			alarmId: alarm.id,
			lineId: alarm.lineId,
			lineCode: alarm.lineCode,
			lineName: alarm.lineName,
			customerId: alarm.customerId,
			alarmTime: alarm.alarmTime,
			alarmGrade: alarm.alarmGrade,
			faultDesc: body.faultDesc || "",
			dispatcher,
			workerId: worker.id,
			status: 0
		};

		// 派单号生成 + 写入（唯一冲突时重试一次）
		let dispatch: AlarmDispatch;
		try {
			payload.dispatchNo = await this.generateDispatchNo();
			dispatch = await this.dispatchRepo.create(payload);
		} catch (err: any) {
			if (err instanceof UniqueConstraintError) {
				payload.dispatchNo = await this.generateDispatchNo();
				dispatch = await this.dispatchRepo.create(payload);
			} else {
				throw err;
			}
		}

		// 派单站内通知（通知失败不得阻断派单）
		try {
			await this.noticeService.deliverToReceivers(
				{
					noticeType: "alarm_dispatch",
					title: `新报警派单：${alarm.lineName}`,
					content: `线路：${alarm.lineName}\n客户：${customerName}\n报警时间：${this.formatTime(alarm.alarmTime)}\n报警等级：${alarm.alarmGrade}级`,
					bizType: "alarm_dispatch",
					bizId: Number(dispatch.id)
				},
				{ workers: { mode: "ids", ids: [worker.id] } }
			);
		} catch (err) {
			console.error("[notice] 报警派单通知失败:", err);
		}

		return { code: 200, message: "报警派单成功", data: dispatch.toJSON() };
	}

	// 派单号：AD + 东八区 yyyyMMdd + 3 位当日序号（当天已创建数量 + 1，冲突则递增重试）
	private async generateDispatchNo(): Promise<string> {
		const d = new Date(new Date().getTime() + 8 * 60 * 60 * 1000);
		const yyyymmdd = `${d.getUTCFullYear()}${String(d.getUTCMonth() + 1).padStart(2, "0")}${String(d.getUTCDate()).padStart(2, "0")}`;
		const prefix = `AD${yyyymmdd}`;
		const dayStart = new Date(`${d.getUTCFullYear()}-${String(d.getUTCMonth() + 1).padStart(2, "0")}-${String(d.getUTCDate()).padStart(2, "0")}T00:00:00+08:00`);
		const count = await this.dispatchRepo.count({ where: { createdAt: { [Op.gte]: dayStart } } });
		for (let i = 1; i <= 100; i++) {
			const no = `${prefix}${String(count + i).padStart(3, "0")}`;
			const exists = await this.dispatchRepo.findOne({ where: { dispatchNo: no }, attributes: ["id"] });
			if (!exists) return no;
		}
		throw new Error("派单号生成冲突，请重试");
	}

	private formatTime(t?: Date): string {
		if (!t) return "-";
		return new Date(t).toLocaleString("zh-CN", { hour12: false });
	}
}