package com.xiaopeng.maintenance.schedule;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.xiaopeng.api.feignClient.account.XpOperationUserClient;
import com.xiaopeng.api.feignClient.vehicleConvoy.XpFleetOperationsClient;
import com.xiaopeng.api.feignClient.vehicleConvoy.XpVehicleClient;
import com.xiaopeng.api.model.account.XpOperationsRole;
import com.xiaopeng.api.model.maintenance.XpTask;
import com.xiaopeng.api.model.maintenance.XpTaskRule;
import com.xiaopeng.api.model.maintenance.XpTaskRuleRole;
import com.xiaopeng.api.model.vehicleConvoy.XpVehicle;
import com.xiaopeng.api.vo.automaticPilot.VehiclePosition;
import com.xiaopeng.common.core.domain.R;
import com.xiaopeng.api.vo.maintenance.TaskScheduleConstants;
import com.xiaopeng.common.core.utils.SensitiveDataCryptoUtil;
import com.xiaopeng.maintenance.mapper.XpTaskMapper;
import com.xiaopeng.maintenance.mapper.XpTaskRuleMapper;
import com.xiaopeng.maintenance.mapper.XpTaskRuleRoleMapper;
import com.xiaopeng.maintenance.service.VehicleLocationFillService;
import com.xiaopeng.maintenance.utils.UUIDUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 车辆日常检测定时任务
 * <p>
 * 根据任务规则配置，在指定时间自动创建车辆日常检测任务，
 * 并下发给关联角色的运维人员
 * </p>
 *
 * @author mitao
 * @since 2026-02-27
 */
@Component
public class VehicleInspectionScheduleTask {

    private static final Logger log = LoggerFactory.getLogger(VehicleInspectionScheduleTask.class);

    /**
     * 任务名称
     */
    private static final String TASK_NAME = "车辆日常检测定时任务";

    @Autowired
    private XpTaskRuleMapper taskRuleMapper;

    @Autowired
    private XpTaskRuleRoleMapper taskRuleRoleMapper;

    @Autowired
    private XpTaskMapper taskMapper;

    @Autowired
    private XpVehicleClient xpVehicleClient;

    @Autowired
    private XpOperationUserClient xpOperationUserClient;

    @Autowired
    private XpFleetOperationsClient xpFleetOperationsClient;

    @Autowired
    private VehicleLocationFillService vehicleLocationFillService;

    /**
     * 每分钟检查一次是否需要执行任务下发
     * <p>
     * 检查逻辑：
     * 1. 获取任务规则配置
     * 2. 判断日常检测功能是否启用
     * 3. 判断当前时间是否为配置的任务下发时间
     * 4. 查询所有运营中的车辆
     * 5. 根据检测频次判断是否需要创建任务
     * 6. 创建任务并分配给相关角色的运维人员
     * </p>
     */
    @Scheduled(cron = "0 * * * * ?")
    public void executeInspectionTask() {
        log.info("========== 开始执行车辆日常检测定时任务检查 ==========");

        // 1. 获取任务规则配置
        XpTaskRule taskRule = getTaskRule();
        if (taskRule == null) {
            log.info("未找到任务规则配置，跳过执行");
            return;
        }

        // 2. 判断日常检测功能是否启用
        if (!Boolean.TRUE.equals(taskRule.getVehicleInspection())) {
            log.info("车辆日常检测功能未启用，跳过执行");
            return;
        }

        // 3. 判断当前时间是否为配置的任务下发时间
        if (!isExecuteTime(taskRule.getVehicleInspectionTime())) {
            log.debug("当前时间不是任务下发时间，跳过执行");
            return;
        }

        log.info("开始执行车辆日常检测任务下发，检测频次: 每{}天/次, 紧急程度: P{}",
                taskRule.getVehicleInspectionFrequency(),
                taskRule.getVehicleInspectionLevel());

        try {
            // 执行任务创建
            int createdCount = createInspectionTasks(taskRule);

            log.info("========== 车辆日常检测定时任务执行完成，创建任务数: {} ==========", createdCount);

        } catch (Exception e) {
            log.error("车辆日常检测定时任务执行失败", e);
        }
    }

    /**
     * 获取任务规则配置
     *
     * @return 任务规则
     */
    private XpTaskRule getTaskRule() {
        return taskRuleMapper.selectOne(new LambdaQueryWrapper<XpTaskRule>().last("limit 1"));
    }

    /**
     * 判断当前时间是否为任务下发时间
     * <p>
     * 精确到分钟级别的时间匹配
     * </p>
     *
     * @param executeTime 配置的执行时间
     * @return 是否应该执行
     */
    private boolean isExecuteTime(LocalTime executeTime) {
        if (executeTime == null) {
            log.warn("任务下发时间未配置");
            return false;
        }

        LocalTime now = LocalTime.now();

        // 精确到分钟匹配
        return executeTime.getHour() == now.getHour() && executeTime.getMinute() == now.getMinute();
    }

    /**
     * 创建车辆日常检测任务
     *
     * @param taskRule 任务规则配置
     * @return 创建的任务数量
     */
    private int createInspectionTasks(XpTaskRule taskRule) {
        // 1. 获取任务接收角色的运维人员
        List<Long> roleOperationUserIds = getOperationUserIdsByRoleType(TaskScheduleConstants.RULE_ROLE_TYPE_INSPECTION);
        if (CollectionUtils.isEmpty(roleOperationUserIds)) {
            log.warn("未找到车辆日常检测任务接收角色的运维人员");
            return 0;
        }

        Set<Long> roleOperationUserIdSet = new HashSet<>(roleOperationUserIds);
        log.info("找到 {} 个运维人员可接收日常检测任务", roleOperationUserIdSet.size());

        // 2. 获取所有运营中的车辆
        List<XpVehicle> vehicles = getOperatingVehicles();
        if (CollectionUtils.isEmpty(vehicles)) {
            log.info("没有运营中的车辆，无需创建检测任务");
            return 0;
        }

        log.info("找到 {} 辆运营中的车辆", vehicles.size());

        // 3. 过滤出今日需要检测的车辆
        List<XpVehicle> needInspectionVehicles = filterVehiclesNeedInspection(vehicles, taskRule.getVehicleInspectionFrequency());
        if (CollectionUtils.isEmpty(needInspectionVehicles)) {
            log.info("今日没有需要检测的车辆");
            return 0;
        }

        log.info("过滤后有 {} 辆车辆需要今日检测", needInspectionVehicles.size());

        // 4. 创建任务并分配给运维人员
        Map<Long, Long> vehicleIdToFleetIdCache = new HashMap<>();
        Map<Long, Set<Long>> fleetIdToOperationUserIdsCache = new HashMap<>();
        return createTasksAndAssign(needInspectionVehicles, roleOperationUserIdSet, taskRule,
                vehicleIdToFleetIdCache, fleetIdToOperationUserIdsCache);
    }

    /**
     * 根据角色类型获取运维人员ID列表
     *
     * @param roleType 角色类型
     * @return 运维人员ID列表
     */
    private List<Long> getOperationUserIdsByRoleType(Integer roleType) {
        // 1. 获取该类型对应的角色ID
        List<XpTaskRuleRole> ruleRoles = taskRuleRoleMapper.selectList(
                new LambdaQueryWrapper<XpTaskRuleRole>()
                        .eq(XpTaskRuleRole::getRuleType, roleType)
        );

        if (CollectionUtils.isEmpty(ruleRoles)) {
            return Collections.emptyList();
        }

        // 2. 获取角色对应的运维人员
        Set<Long> userIds = new HashSet<>();
        for (XpTaskRuleRole ruleRole : ruleRoles) {
            try {
                R<List<XpOperationsRole>> result = xpOperationUserClient.getXpOperationsRoleByRoleId(ruleRole.getRoleId());
                if (result != null && result.getData() != null) {
                    userIds.addAll(
                            result.getData().stream()
                                    .map(XpOperationsRole::getOperationsUserId)
                                    .collect(Collectors.toList())
                    );
                }
            } catch (Exception e) {
                log.error("获取角色[{}]对应的运维人员失败", ruleRole.getRoleId(), e);
            }
        }

        return new ArrayList<>(userIds);
    }

    /**
     * 获取所有运营中的车辆
     *
     * @return 车辆列表
     */
    private List<XpVehicle> getOperatingVehicles() {
        try {
            R<List<XpVehicle>> result = xpVehicleClient.listVehicle();
            if (result != null && result.getData() != null) {
                // 过滤运营中的车辆 (vehicleType=2 表示运营, operatingStatus=1 表示运营中)
                return result.getData().stream()
                        .filter(v -> v.getVehicleType() != null && v.getVehicleType() == 2)
                        .filter(v -> v.getOperatingStatus() != null && v.getOperatingStatus() == 1)
                        .collect(Collectors.toList());
            }
        } catch (Exception e) {
            log.error("获取车辆列表失败", e);
        }
        return Collections.emptyList();
    }

    /**
     * 过滤出需要检测的车辆
     * <p>
     * 根据检测频次判断：vehicleInspectionFrequency 表示每X天检测一次
     * 查询车辆上次检测时间，如果距今天数 >= 频次配置，则需要检测
     * </p>
     *
     * @param vehicles            所有车辆
     * @param inspectionFrequency 检测频次（天）
     * @return 需要检测的车辆列表
     */
    private List<XpVehicle> filterVehiclesNeedInspection(List<XpVehicle> vehicles, Integer inspectionFrequency) {
        // 默认每天检测一次
        if (inspectionFrequency == null || inspectionFrequency <= 0) {
            inspectionFrequency = 1;
        }

        LocalDate today = LocalDate.now();
        List<XpVehicle> needInspectionVehicles = new ArrayList<>();

        for (XpVehicle vehicle : vehicles) {
            // 查询该车辆最近一次检测任务
            XpTask lastTask = taskMapper.selectOne(
                    new LambdaQueryWrapper<XpTask>()
                            .eq(XpTask::getVehicleId, vehicle.getId())
                            .eq(XpTask::getTaskCategory, TaskScheduleConstants.TASK_CATEGORY_ROUTINE)
                            .eq(XpTask::getTaskTypeId, TaskScheduleConstants.TASK_TYPE_DETECTION)
                            .orderByDesc(XpTask::getCreateTime)
                            .last("limit 1")
            );

            // 如果从未检测过，需要检测
            if (lastTask == null || lastTask.getCreateTime() == null) {
                needInspectionVehicles.add(vehicle);
                continue;
            }

            // 计算距离上次检测的天数
            LocalDate lastInspectionDate = lastTask.getCreateTime().toLocalDate();
            long daysSinceLastInspection = java.time.temporal.ChronoUnit.DAYS.between(lastInspectionDate, today);

            // 如果距离上次检测天数 >= 频次配置，则需要检测
            if (daysSinceLastInspection >= inspectionFrequency) {
                needInspectionVehicles.add(vehicle);
            }
        }

        return needInspectionVehicles;
    }

    /**
     * 创建任务并分配给运维人员
     *
     * @param vehicles        需要检测的车辆列表
     * @param roleOperationUserIds 配置角色下的运维人员ID集合
     * @param taskRule        任务规则
     * @param vehicleIdToFleetIdCache 车辆->车队缓存
     * @param fleetIdToOperationUserIdsCache 车队->人员缓存
     * @return 创建的任务数量
     */
    private int createTasksAndAssign(List<XpVehicle> vehicles, Set<Long> roleOperationUserIds, XpTaskRule taskRule,
                                     Map<Long, Long> vehicleIdToFleetIdCache,
                                     Map<Long, Set<Long>> fleetIdToOperationUserIdsCache) {
        List<XpTask> tasksToSave = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        int skippedCount = 0;

        Map<String, VehiclePosition> positionByVin = vehicleLocationFillService.loadPositionByVin(
                vehicles.stream()
                        .map(XpVehicle::getVehicleVin)
                        .filter(StringUtils::hasLength)
                        .distinct()
                        .collect(Collectors.toList())
        );

        for (XpVehicle vehicle : vehicles) {
            List<Long> handleUserIds = resolveHandleUserIds(vehicle.getId(), roleOperationUserIds,
                    vehicleIdToFleetIdCache, fleetIdToOperationUserIdsCache);
            if (CollectionUtils.isEmpty(handleUserIds)) {
                skippedCount++;
                continue;
            }

            String belongUserIds = handleUserIds.stream().map(String::valueOf).collect(Collectors.joining(","));

            XpTask task = new XpTask();

            // 生成任务编号
            String taskCode = sdf.format(new Date()) + UUIDUtil.getNumberRandom(5);
            task.setTaskCode(taskCode);

            // 设置任务基本信息
            task.setTaskCategory(TaskScheduleConstants.TASK_CATEGORY_ROUTINE);
            task.setTaskTypeId(TaskScheduleConstants.TASK_TYPE_DETECTION);
            task.setTaskUrgencyLevel(taskRule.getVehicleInspectionLevel() != null
                    ? taskRule.getVehicleInspectionLevel()
                    : TaskScheduleConstants.URGENCY_LEVEL_P2);
            task.setTaskDescription("系统自动下发的车辆日常检测任务");

            // 设置车辆信息
            task.setVehicleId(vehicle.getId());
            String vin = SensitiveDataCryptoUtil.decryptIfPossible(vehicle.getVehicleVin());
            vehicleLocationFillService.fillFromVin(task, vin, positionByVin);

            // 设置任务时限 常规任务限时3天
            task.setEndTime(LocalDateTime.now().plusDays(3));

            // 设置任务状态为待到达
            task.setStatus(TaskScheduleConstants.TASK_STATUS_PENDING);

            // 设置任务接收人（车辆所属车队关联人员与配置角色人员取交集）
            task.setHandleUserId(belongUserIds);

            // 设置创建信息
            task.setReportTime(LocalDateTime.now());
            task.setCreateBy(TaskScheduleConstants.SCHEDULE_CREATOR);

            tasksToSave.add(task);
        }

        // 批量保存任务
        if (!CollectionUtils.isEmpty(tasksToSave)) {
            for (XpTask task : tasksToSave) {
                task.setReportTime(LocalDateTime.now());
                task.setReportUserId(0L);
                taskMapper.insert(task);
            }
            log.info("成功创建 {} 个车辆日常检测任务", tasksToSave.size());
        }
        if (skippedCount > 0) {
            log.warn("车辆日常检测任务：跳过 {} 辆车（无可分配处理人）", skippedCount);
        }

        return tasksToSave.size();
    }

    private List<Long> resolveHandleUserIds(Long vehicleId, Set<Long> roleOperationUserIds,
                                           Map<Long, Long> vehicleIdToFleetIdCache,
                                           Map<Long, Set<Long>> fleetIdToOperationUserIdsCache) {
        if (vehicleId == null) {
            log.warn("车辆日常检测定时任务分配处理人失败：vehicleId为空");
            return Collections.emptyList();
        }

        Long fleetId = vehicleIdToFleetIdCache.get(vehicleId);
        if (!vehicleIdToFleetIdCache.containsKey(vehicleId)) {
            try {
                R<Long> fleetIdResult = xpVehicleClient.findFleetIdByVehicleId(vehicleId);
                fleetId = fleetIdResult != null ? fleetIdResult.getData() : null;
            } catch (Exception e) {
                log.error("车辆日常检测定时任务：根据车辆查询车队失败，vehicleId={}", vehicleId, e);
                fleetId = null;
            }
            vehicleIdToFleetIdCache.put(vehicleId, fleetId);
        }

        if (fleetId == null) {
            log.warn("车辆日常检测定时任务跳过：车辆未关联车队，vehicleId={}", vehicleId);
            return Collections.emptyList();
        }

        Set<Long> fleetOperationUserIds = fleetIdToOperationUserIdsCache.get(fleetId);
        if (!fleetIdToOperationUserIdsCache.containsKey(fleetId)) {
            try {
                R<List<Long>> opsResult = xpFleetOperationsClient.getOperationsIdsByFleetId(fleetId);
                List<Long> opsIds = opsResult != null ? opsResult.getData() : null;
                fleetOperationUserIds = CollectionUtils.isEmpty(opsIds) ? Collections.emptySet() : new HashSet<>(opsIds);
            } catch (Exception e) {
                log.error("车辆日常检测定时任务：根据车队查询关联人员失败，fleetId={}, vehicleId={}", fleetId, vehicleId, e);
                fleetOperationUserIds = Collections.emptySet();
            }
            fleetIdToOperationUserIdsCache.put(fleetId, fleetOperationUserIds);
        }

        if (CollectionUtils.isEmpty(fleetOperationUserIds)) {
            log.warn("车辆日常检测定时任务跳过：车队未关联人员，fleetId={}, vehicleId={}", fleetId, vehicleId);
            return Collections.emptyList();
        }

        List<Long> finalUserIds = fleetOperationUserIds.stream()
                .filter(roleOperationUserIds::contains)
                .sorted()
                .collect(Collectors.toList());
        if (CollectionUtils.isEmpty(finalUserIds)) {
            log.warn("车辆日常检测定时任务跳过：车队人员与角色人员无交集，fleetId={}, vehicleId={}", fleetId, vehicleId);
            return Collections.emptyList();
        }

        return finalUserIds;
    }
}