package com.rj.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.rj.entity.LbFanManagement;
import com.rj.mapper.LbFanManagementMapper;
import com.rj.service.ILbFanManagementService;
import com.rj.tenant.TenantContextHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;

/**
 * 粉丝管理服务实现
 */
@Slf4j
@Service
public class LbFanManagementServiceImpl
        extends ServiceImpl<LbFanManagementMapper, LbFanManagement>
        implements ILbFanManagementService {

    private static final DateTimeFormatter DATE_TIME_FORMATTER =
            DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    @Override
    public Map<String, Object> add(LbFanManagement entity) {
        Map<String, Object> result = new HashMap<>();
        try {
            trimStringFields(entity);
            fillTenantIdIfAbsent(entity);
            Map<String, Object> keyError = validateCompositeKey(entity);
            if (keyError != null) {
                return keyError;
            }
            Map<String, Object> idTenantError = fillAndValidateIdTenantId(entity);
            if (idTenantError != null) {
                return idTenantError;
            }
            if (existsByIdTenantId(entity.getIdTenantId())) {
                result.put("success", false);
                result.put("message", "唯一ID已存在：" + entity.getIdTenantId());
                return result;
            }
            if (entity.getShareNum() == null) {
                entity.setShareNum(0);
            }
            if (entity.getCreatedAt() == null) {
                entity.setCreatedAt(LocalDateTime.now());
            }

            boolean ok = this.save(entity);
            result.put("success", ok);
            result.put("message", ok ? "新增成功" : "新增失败");
            if (ok) {
                result.put("data", entity);
            }
            return result;
        } catch (DuplicateKeyException e) {
            log.warn("粉丝管理新增重复键, idTenantId={}", entity.getIdTenantId());
            result.put("success", false);
            result.put("message", "唯一ID已存在：" + entity.getIdTenantId());
            return result;
        } catch (Exception e) {
            log.error("粉丝管理新增异常", e);
            result.put("success", false);
            result.put("message", "新增异常：" + e.getMessage());
            return result;
        }
    }

    @Override
    public Map<String, Object> update(LbFanManagement entity) {
        Map<String, Object> result = new HashMap<>();
        try {
            trimStringFields(entity);
            fillTenantIdIfAbsent(entity);
            Map<String, Object> keyError = validateCompositeKey(entity);
            if (keyError != null) {
                return keyError;
            }
            Map<String, Object> idTenantError = fillAndValidateIdTenantId(entity);
            if (idTenantError != null) {
                return idTenantError;
            }
            LbFanManagement existing = this.getById(entity.getIdTenantId());
            if (existing == null) {
                result.put("success", false);
                result.put("message", "记录不存在，id_tenant_id=" + entity.getIdTenantId());
                return result;
            }
            if (entity.getCreatedAt() == null) {
                entity.setCreatedAt(existing.getCreatedAt());
            }
            // 唯一主键与联合键字段不可变更
            entity.setIdTenantId(existing.getIdTenantId());
            entity.setTenantId(existing.getTenantId());
            entity.setId(existing.getId());

            boolean ok = this.updateById(entity);
            result.put("success", ok);
            result.put("message", ok ? "修改成功" : "修改失败");
            if (ok) {
                result.put("data", this.getById(entity.getIdTenantId()));
            }
            return result;
        } catch (Exception e) {
            log.error("粉丝管理修改异常", e);
            result.put("success", false);
            result.put("message", "修改异常：" + e.getMessage());
            return result;
        }
    }

    @Override
    public Map<String, Object> deleteByIdTenantId(String idTenantId) {
        Map<String, Object> result = new HashMap<>();
        try {
            if (idTenantId == null || idTenantId.trim().isEmpty()) {
                result.put("success", false);
                result.put("message", "唯一ID（id_tenant_id）不能为空");
                return result;
            }
            String key = idTenantId.trim();
            boolean ok = this.removeById(key);
            result.put("success", ok);
            result.put("message", ok ? "删除成功" : "删除失败，记录可能不存在");
            return result;
        } catch (Exception e) {
            log.error("粉丝管理删除异常, idTenantId={}", idTenantId, e);
            result.put("success", false);
            result.put("message", "删除异常：" + e.getMessage());
            return result;
        }
    }

    @Override
    public Map<String, Object> pageQuery(Integer current,
                                         Integer size,
                                         String nickname,
                                         String mobile,
                                         Integer shareNumMin,
                                         Integer shareNumMax,
                                         String createdAtStart,
                                         String createdAtEnd) {
        Map<String, Object> result = new HashMap<>();
        try {
            if (current == null || current < 1) {
                current = 1;
            }
            if (size == null || size < 1) {
                size = 10;
            }

            LambdaQueryWrapper<LbFanManagement> queryWrapper = new LambdaQueryWrapper<>();
            if (nickname != null && !nickname.trim().isEmpty()) {
                queryWrapper.like(LbFanManagement::getNickname, nickname.trim());
            }
            if (mobile != null && !mobile.trim().isEmpty()) {
                queryWrapper.like(LbFanManagement::getMobile, mobile.trim());
            }
            if (shareNumMin != null) {
                queryWrapper.ge(LbFanManagement::getShareNum, shareNumMin);
            }
            if (shareNumMax != null) {
                queryWrapper.le(LbFanManagement::getShareNum, shareNumMax);
            }

            LocalDateTime start = parseDateTime(createdAtStart);
            if (createdAtStart != null && !createdAtStart.trim().isEmpty() && start == null) {
                result.put("success", false);
                result.put("message", "createdAtStart 格式错误，请使用 yyyy-MM-dd HH:mm:ss");
                return result;
            }
            LocalDateTime end = parseDateTime(createdAtEnd);
            if (createdAtEnd != null && !createdAtEnd.trim().isEmpty() && end == null) {
                result.put("success", false);
                result.put("message", "createdAtEnd 格式错误，请使用 yyyy-MM-dd HH:mm:ss");
                return result;
            }
            if (start != null) {
                queryWrapper.ge(LbFanManagement::getCreatedAt, start);
            }
            if (end != null) {
                queryWrapper.le(LbFanManagement::getCreatedAt, end);
            }
            queryWrapper.orderByDesc(LbFanManagement::getCreatedAt);

            Page<LbFanManagement> page = this.page(new Page<>(current, size), queryWrapper);
            result.put("success", true);
            result.put("message", "查询成功");
            result.put("data", page.getRecords());
            result.put("total", page.getTotal());
            result.put("current", page.getCurrent());
            result.put("size", page.getSize());
            result.put("pages", page.getPages());
            return result;
        } catch (Exception e) {
            log.error("粉丝管理分页查询异常", e);
            result.put("success", false);
            result.put("message", "查询异常：" + e.getMessage());
            return result;
        }
    }

    /**
     * 生成唯一ID：id + '_' + tenant_id
     */
    public static String buildIdTenantId(Long id, String tenantId) {
        return id + "_" + tenantId;
    }

    private Map<String, Object> validateCompositeKey(LbFanManagement entity) {
        Map<String, Object> result = new HashMap<>();
        if (entity.getTenantId() == null || entity.getTenantId().trim().isEmpty()) {
            result.put("success", false);
            result.put("message", "租户ID不能为空");
            return result;
        }
        if (entity.getId() == null) {
            result.put("success", false);
            result.put("message", "粉丝ID不能为空");
            return result;
        }
        return null;
    }

    /**
     * 填充 id_tenant_id，并与传入值校验一致。
     */
    private Map<String, Object> fillAndValidateIdTenantId(LbFanManagement entity) {
        Map<String, Object> result = new HashMap<>();
        String expected = buildIdTenantId(entity.getId(), entity.getTenantId());
        if (entity.getIdTenantId() == null || entity.getIdTenantId().trim().isEmpty()) {
            entity.setIdTenantId(expected);
            return null;
        }
        String actual = entity.getIdTenantId().trim();
        if (!expected.equals(actual)) {
            result.put("success", false);
            result.put("message", "id_tenant_id 与 id、tenant_id 不一致，应为：" + expected);
            return result;
        }
        entity.setIdTenantId(actual);
        return null;
    }

    private boolean existsByIdTenantId(String idTenantId) {
        return this.getById(idTenantId) != null;
    }

    private void fillTenantIdIfAbsent(LbFanManagement entity) {
        if (entity.getTenantId() == null || entity.getTenantId().trim().isEmpty()) {
            String tenantId = TenantContextHolder.getTenantId();
            if (tenantId != null && !tenantId.trim().isEmpty()) {
                entity.setTenantId(tenantId.trim());
            }
        }
    }

    private void trimStringFields(LbFanManagement entity) {
        if (entity.getIdTenantId() != null) {
            entity.setIdTenantId(entity.getIdTenantId().trim());
        }
        if (entity.getTenantId() != null) {
            entity.setTenantId(entity.getTenantId().trim());
        }
        if (entity.getAvatar() != null) {
            entity.setAvatar(entity.getAvatar().trim());
        }
        if (entity.getNickname() != null) {
            entity.setNickname(entity.getNickname().trim());
        }
        if (entity.getMobile() != null) {
            entity.setMobile(entity.getMobile().trim());
        }
    }

    private LocalDateTime parseDateTime(String text) {
        if (text == null || text.trim().isEmpty()) {
            return null;
        }
        try {
            return LocalDateTime.parse(text.trim(), DATE_TIME_FORMATTER);
        } catch (Exception e) {
            return null;
        }
    }
}