package com.ruoyi.web.controller.product;

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.ObjectUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.ruoyi.common.core.controller.BaseController;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.domain.R;
import com.ruoyi.common.core.page.TableDataInfo;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.im.comm.Result;
import com.ruoyi.im.service.InsuranceProductService;
import com.ruoyi.im.service.MedicalInsuranceAccountService;
import com.ruoyi.im.service.impl.InsurancePositionServiceImpl;
import com.ruoyi.im.util.RedisDistributedLock;
import com.ruoyi.im.util.UserPolicyUtils;
import com.ruoyi.system.domain.*;
import com.ruoyi.system.domain.dto.UserPolicyDto;
import com.ruoyi.im.service.UserPolicyService;
import com.ruoyi.system.service.UserAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.interceptor.TransactionAspectSupport;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.UUID;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/userPolicy")
public class UserPolicyController extends BaseController {

    @Autowired
    UserPolicyService userPolicyService;

    @Autowired
    MedicalInsuranceAccountService medicalInsuranceAccountService;

    @Autowired
    UserAccountService userAccountService;

    @Autowired
    InsurancePositionServiceImpl insurancePositionService;

    @Autowired
    private RedisDistributedLock redisDistributedLock;

    @Autowired
    InsuranceProductService insuranceProductService;

    /**
     * 保险购买申请
     */
    @PostMapping("/purchaseApplication")
    public Result purchaseApplication(UserPolicyDto dto) {
        // 生成锁的key：基于用户ID和产品ID，防止同一用户同时购买同一产品
        String lockKey = redisDistributedLock.generateLockKey(dto.getAccount(), dto.getProductId());

        boolean lockAcquired = false;
        try {
            // 尝试获取分布式锁：等待10秒，锁过期30秒
            lockAcquired = redisDistributedLock.tryLock(lockKey, 30L, 10L);

            if (!lockAcquired) {
                return Result.error("操作过于频繁，请稍后重试");
            }

            // 执行购买逻辑
            return userPolicyService.purchaseApplication(dto);

        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("购买失败");
        } finally {
            // 释放锁
            if (lockAcquired) {
                redisDistributedLock.releaseLock(lockKey);
            }
        }
    }



    /**
     * 根据用户id查询保单
     */
    @GetMapping("/getPolicyById")
    public Result getPolicyById(@RequestParam(value = "account") String account) {
        try {
            UserAccount userAccount = userAccountService.getOne(new LambdaQueryWrapper<UserAccount>()
                    .eq(UserAccount::getAccount,account));
            List<UserPolicy> list = userPolicyService.list(new LambdaQueryWrapper<UserPolicy>().eq(UserPolicy::getUserId, userAccount.getId()));
            return Result.success(list);
        }catch (Exception e){
            e.printStackTrace();
            return Result.error("查询失败");
        }
    }

    /**
     * 保单列表
     */
    @GetMapping("/list")
    public TableDataInfo list(@RequestParam(value = "account",required = false) String account,
                              @RequestParam(value = "state",defaultValue = "0") Integer state,
                              @RequestParam(value = "productName",required = false) String productName) {
        startPage();

        LambdaQueryWrapper<UserPolicy> wrapper = new LambdaQueryWrapper<>();

        // 产品名称模糊查询
        if (org.apache.commons.lang3.StringUtils.isNotBlank(account)) {
            wrapper.like(UserPolicy::getAccount, account);
        }

        // 产品代码模糊查询
        if (org.apache.commons.lang3.StringUtils.isNotBlank(productName)) {
            wrapper.like(UserPolicy::getProductName, productName);
        }

        // 审批状态
        if (state != null && state == 3) {
            wrapper.ne(UserPolicy::getApprovalStatus, 0);
        }else{
            wrapper.eq(UserPolicy::getApprovalStatus, 0);
        }

        // 按创建时间倒序排列
        wrapper.orderByDesc(UserPolicy::getCreatedAt);

        List<UserPolicy> list = userPolicyService.list(wrapper);
        return getDataTable(list);
    }


    /**
     * 保单审批
     */
    @GetMapping("/examine")
    @Transactional
    public AjaxResult examine(@RequestParam(value = "id") Integer id,
                              @RequestParam(value = "approvalStatus") Integer approvalStatus,
                              @RequestParam(value = "message",required = false) String message) {
        try {
            UserPolicy userPolicy = userPolicyService.getById(id);
            if(ObjectUtil.isEmpty(userPolicy)){
                return AjaxResult.error("订单不存在");
            }
            if(userPolicy.getApprovalStatus() != 0){
                return AjaxResult.error("订单已审批！");
            }
            if(approvalStatus == 2 && StringUtils.isEmpty(message)){
                return AjaxResult.error("驳回理由不能为空！");
            }
            UserAccount userAccount = userAccountService.getById(userPolicy.getUserId());
            if(approvalStatus == 2){
                userPolicy.setApprovalStatus(approvalStatus);
                userPolicy.setMessage(message);
                userPolicy.setUpdatedAt(new Date());
                userPolicyService.updateById(userPolicy);

                userAccount.setBalance(userAccount.getBalance().add(userPolicy.getPremium()));
                userAccountService.updateById(userAccount);
                return AjaxResult.success("审批成功");
            }

            //计算到期时间
            LocalDate expirationTime = calculateInsuranceEndDateToDay(LocalDate.now(), userPolicy.getTerm());

            userPolicy.setApprovalStatus(approvalStatus);
            userPolicy.setMessage(message);
            userPolicy.setStartDate(LocalDate.now());
            userPolicy.setEndDate(expirationTime);
            userPolicy.setPolicyStatus(UserPolicy.PolicyStatus.ACTIVE);
            userPolicy.setUpdatedAt(new Date());
            userPolicyService.updateById(userPolicy);

            MedicalInsuranceAccount medicalInsuranceAccount = new MedicalInsuranceAccount();
            medicalInsuranceAccount.setUserId(userPolicy.getUserId());
            medicalInsuranceAccount.setPolicyId(userPolicy.getId());
            medicalInsuranceAccount.setProductId(userPolicy.getProductId());
            medicalInsuranceAccount.setTotalQuota(userPolicy.getCoverageAmount());
            medicalInsuranceAccount.setRemainingBalance(BigDecimal.ZERO);
            medicalInsuranceAccount.setAmountClaimed(userPolicy.getCoverageAmount());
            medicalInsuranceAccount.setAlreadyReceived(BigDecimal.ZERO);
            medicalInsuranceAccount.setAmountAlreadyUsed(BigDecimal.ZERO);
            medicalInsuranceAccount.setEffectiveDate(userPolicy.getStartDate());
            medicalInsuranceAccount.setExpiryDate(userPolicy.getEndDate());
            medicalInsuranceAccount.setAccountStatus(MedicalInsuranceAccount.AccountStatus.ACTIVE);
            medicalInsuranceAccount.setCreatedAt(new Date());
            medicalInsuranceAccount.setUpdatedAt(new Date());
            medicalInsuranceAccountService.save(medicalInsuranceAccount);

            //判断上级用户职位达成
            if(approvalStatus == 1){
                if(StringUtils.isNotEmpty(userAccount.getInvitationAccount())){
                    //上级
                    UserAccount superiorUser = userAccountService.getOne(new LambdaQueryWrapper<UserAccount>()
                            .eq(UserAccount::getAccount, userAccount.getInvitationAccount())
                    );
                    //查询上级的所有下级
                    List<UserAccount> userAccountList = userAccountService.list(new LambdaQueryWrapper<UserAccount>()
                            .eq(UserAccount::getInvitationAccount, superiorUser.getAccount())
                    );
                    if(userAccountList.size() == 0){
                        return AjaxResult.success("审批成功");
                    }
                    List<Integer> idList = userAccountList.stream()
                            .map(UserAccount::getId)
                            .collect(Collectors.toList());
                    //查询下级的保单
                    List<UserPolicy> userPolicyList = userPolicyService.list(new LambdaQueryWrapper<>(UserPolicy.class)
                            .in(UserPolicy::getUserId, idList)
                    );
                    // 手动将当前审批的保单加入到列表中（因为事务隔离可能查不到）
                    userPolicyList.add(userPolicy);
                    if(userPolicyList.size() == 0){
                        return AjaxResult.success("审批成功");
                    }
                    //生效保单数量
                    long activePolicies = UserPolicyUtils.countActivePolicies(userPolicyList);
                    //查询所有职位
                    List<InsurancePosition> positions = insurancePositionService.list();
                    positions.forEach(f->{
                        if(activePolicies >= f.getNumberPeople()){
                            superiorUser.setPosition(f.getPosition());
                            superiorUser.setAgreedTime(LocalDate.now());
                        }
                    });
                    userAccountService.updateById(superiorUser);
                }
                return AjaxResult.success("审批成功");
            }
            return AjaxResult.success("审批成功");
        }catch (Exception e){
            e.printStackTrace();
            // 手动设置回滚
            TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
            return AjaxResult.error("审批失败！");
        }
    }

    /**
     * 计算保险到期日
     * @param startDate 保险开始日期
     * @param termDays 保险天数
     * @return 保险到期日期
     */
    public static LocalDate calculateInsuranceEndDateToDay(LocalDate startDate, int termDays) {
        return calculateDateAfterDays(startDate, termDays);
    }

    /**
     * 计算指定天数后的日期
     * @param startDate 开始日期
     * @param daysToAdd 要添加的天数
     * @return 计算后的日期
     */
    public static LocalDate calculateDateAfterDays(LocalDate startDate, int daysToAdd) {
        if (startDate == null) {
            throw new IllegalArgumentException("开始日期不能为空");
        }
        return startDate.plusDays(daysToAdd);
    }

    /**
     * 计算保险到期日
     * @param startDate 保险开始日期
     * @param termYears 保险年限
     * @return 保险到期日期
     */
    public static LocalDate calculateInsuranceEndDate(LocalDate startDate, int termYears) {
        return calculateDateAfterYears(startDate, termYears);
    }

    /**
     * 根据基准日期和年限推算日期
     */
    public static LocalDate calculateDateAfterYears(LocalDate baseDate, int years) {
        validateBaseDate(baseDate);
        return baseDate.plusYears(years);
    }

    /**
     * 验证基准日期
     */
    private static void validateBaseDate(LocalDate baseDate) {
        if (baseDate == null) {
            throw new IllegalArgumentException("基准日期不能为null");
        }
    }
}