package com.xiaopeng.operation.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xiaopeng.api.dto.pushMessage.AliPushMessageDTO;
import com.xiaopeng.api.feignClient.account.XpOperationUserClient;
import com.xiaopeng.api.feignClient.account.XpOperationUserNotificationClient;
import com.xiaopeng.api.feignClient.pushMessage.XpAliPushMessageClient;
import com.xiaopeng.api.model.account.XpOperationsUser;
import com.xiaopeng.api.model.account.XpOperationsUserNotification;
import com.xiaopeng.api.model.operation.XpAppVersion;
import com.xiaopeng.common.core.domain.R;
import com.xiaopeng.common.core.enums.NotificationTypeEnum;
import com.xiaopeng.common.core.exception.ServiceException;
import com.xiaopeng.common.core.web.page.BasePage;
import com.xiaopeng.common.core.web.page.PageInfo;
import com.xiaopeng.common.security.utils.SecurityUtils;
import com.xiaopeng.operation.mapper.XpAppVersionMapper;
import com.xiaopeng.operation.service.IXpAppVersionService;
import com.xiaopeng.operation.vo.XpAppVersionVO;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * App版本管理 服务实现类
 *
 * @author mitao
 * @since 2026-02-14
 */
@Slf4j
@Service
@RequiredArgsConstructor(onConstructor_ = @Lazy)
public class XpAppVersionServiceImpl extends ServiceImpl<XpAppVersionMapper, XpAppVersion> implements IXpAppVersionService {

    private final XpOperationUserClient xpOperationUserClient;

    private final XpOperationUserNotificationClient xpOperationUserNotificationClient;

    private final XpAliPushMessageClient xpAliPushMessageClient;

    @Override
    public XpAppVersionVO getLatestVersion() {
        // 查询最新版本(按ID倒序,取第一条)
        XpAppVersion latestVersion = this.lambdaQuery()
                .orderByDesc(XpAppVersion::getVersionCode)
                .last("LIMIT 1")
                .one();

        if (Objects.isNull(latestVersion)) {
            log.warn("未找到App版本信息");
            return null;
        }

        // 转换为 VO
        XpAppVersionVO vo = BeanUtil.copyProperties(latestVersion, XpAppVersionVO.class);
        log.info("获取最新App版本成功, version={}", vo.getVersion());
        return vo;
    }

    @Override
    public PageInfo<XpAppVersion> getPageList(BasePage basePage) {
        Page<XpAppVersion> page = lambdaQuery().orderByDesc(XpAppVersion::getVersionCode).page(new Page<>(basePage.getPageNum(), basePage.getPageSize()));
        PageInfo<XpAppVersion> pageInfo = new PageInfo<>();
        BeanUtil.copyProperties(page, pageInfo);
        return pageInfo;
    }

    @Override
    public void release(XpAppVersion appVersion) {
        Integer latestVersionCode = 0;
        //获取最新版本信息
         XpAppVersion latestVersion = this.lambdaQuery()
                .orderByDesc(XpAppVersion::getVersionCode)
                .last("LIMIT 1")
                .one();

        if (Objects.nonNull(latestVersion)) {
            latestVersionCode = latestVersion.getVersionCode();
        }
        appVersion.setVersionCode(latestVersionCode + 1); // 版本号自增
        save(appVersion);

        // 异步发送版本更新通知
        sendVersionUpdateNotification(appVersion);
    }

    /**
     * 发送版本更新通知
     * @param appVersion 版本信息
     */
    private void sendVersionUpdateNotification(XpAppVersion appVersion) {
        // 异步处理，避免阻塞主流程
        ThreadPoolExecutor executor = new ThreadPoolExecutor(
                1, 1, 0L, TimeUnit.MILLISECONDS,
                new LinkedBlockingQueue<Runnable>()
        );

        executor.execute(() -> {
            try {
                // 1. 获取所有启用状态的运维用户
                R<List<XpOperationsUser>> result = xpOperationUserClient.listAllEnabled();
                if (result == null || result.getCode() != 200 || result.getData() == null || result.getData().isEmpty()) {
                    log.warn("没有需要通知的启用状态用户");
                    return;
                }

                List<XpOperationsUser> enabledUsers = result.getData();
                log.info("版本更新通知，共需通知 {} 位用户", enabledUsers.size());

                // 2. 构建通知内容
                String message = "新版本上线啦！请前往更新。";
                String bodyJson = buildPushBodyJson(message);

                // 3. 构建并保存通知记录
                List<XpOperationsUserNotification> notifications = enabledUsers.stream()
                        .map(user -> buildNotification(message, bodyJson, user))
                        .collect(Collectors.toList());

                // 批量保存通知记录
                xpOperationUserNotificationClient.addNotificationBatch(notifications);
                log.info("版本更新通知记录保存成功，共 {} 条", notifications.size());

                // 4. 按设备类型分组并批量推送
                pushMessageByDeviceType(enabledUsers, message);

            } catch (Exception e) {
                log.error("发送版本更新通知失败", e);
            }
        });

        executor.shutdown();
    }

    /**
     * 构建推送 body JSON
     * @param message 消息内容
     * @return JSON 字符串
     */
    private String buildPushBodyJson(String message) {
        JSONObject body = new JSONObject();
        body.put("content", message);
        body.put("strategy", NotificationTypeEnum.VERSION_UPDATE_TIP.getCode()); // 8
        body.put("type", 0);
        body.put("id", 0);
        return body.toJSONString();
    }

    /**
     * 构建通知实体
     * @param message 消息内容
     * @param bodyJson 推送body内容
     * @param user 运维用户
     * @return 通知实体
     */
    private XpOperationsUserNotification buildNotification(String message, String bodyJson, XpOperationsUser user) {
        XpOperationsUserNotification notification = new XpOperationsUserNotification();
        notification.setNotificationType(NotificationTypeEnum.VERSION_UPDATE_TIP.getCode()); // 8
        notification.setNotificationContent(message);
        notification.setOperationsUserId(user.getId());
        notification.setDataId(0L); // 版本更新通知 dataId 设置为 0
        notification.setReadStatus(0); // 未读
        notification.setNotificationExt(bodyJson);
        return notification;
    }

    /**
     * 按设备类型分组推送消息
     * @param users 用户列表
     * @param message 消息内容
     */
    private void pushMessageByDeviceType(List<XpOperationsUser> users, String message) {
        // 按设备类型分组 (1=Android, 2=iOS)
        Map<Integer, List<XpOperationsUser>> usersByDeviceType = users.stream()
                .filter(u -> u.getDeviceType() != null && u.getPhoneNumber() != null)
                .collect(Collectors.groupingBy(XpOperationsUser::getDeviceType));

        // 分别推送 Android 和 iOS
        for (Map.Entry<Integer, List<XpOperationsUser>> entry : usersByDeviceType.entrySet()) {
            Integer deviceType = entry.getKey();
            List<XpOperationsUser> deviceUsers = entry.getValue();

            // 按 1000 个手机号一批进行推送
            List<List<XpOperationsUser>> batches = partition(deviceUsers, 1000);

            for (List<XpOperationsUser> batch : batches) {
                String accounts = batch.stream()
                        .map(XpOperationsUser::getPhoneNumber)
                        .collect(Collectors.joining(","));

                AliPushMessageDTO pushDTO = buildPushMessageDTO(deviceType, accounts, message);

                try {
                    xpAliPushMessageClient.pushMessage(pushDTO);
                    log.info("版本更新推送成功，设备类型={}，用户数={}",
                            deviceType == 1 ? "Android" : "iOS", batch.size());
                } catch (Exception e) {
                    log.error("版本更新推送失败，设备类型={}", deviceType, e);
                }
            }
        }
    }

    /**
     * 构建推送消息 DTO
     * @param deviceType 设备类型
     * @param accounts 手机号（逗号分隔）
     * @param message 消息内容
     * @return 推送 DTO
     */
    private AliPushMessageDTO buildPushMessageDTO(Integer deviceType, String accounts, String message) {
        AliPushMessageDTO dto = new AliPushMessageDTO();
        dto.setDeviceType(deviceType);
        dto.setAccount(accounts);
        dto.setTitle("APP版本更新提示");
        dto.setBody(buildPushBodyJson(message));
        dto.setPushType("NOTICE");
        return dto;
    }

    /**
     * 将列表按指定大小分批
     * @param list 原始列表
     * @param batchSize 批次大小
     * @return 分批后的列表
     */
    private <T> List<List<T>> partition(List<T> list, int batchSize) {
        List<List<T>> batches = new ArrayList<>();
        for (int i = 0; i < list.size(); i += batchSize) {
            batches.add(list.subList(i, Math.min(i + batchSize, list.size())));
        }
        return batches;
    }
}