package com.example.web.service;

import com.example.web.entity.Login;
import com.example.web.entity.Rootdb;
import com.example.web.entity.UsersManagements;
import com.example.web.entity.Managers;
import com.example.web.mapper.LoginMapper;
import com.example.web.mapper.RootdbMapper;
import com.example.web.mapper.UsersManagementsMapper;
import com.example.web.mapper.SupplyUsersManagementsMapper;
import com.example.web.mapper.ManagersMapper;
import com.example.web.mapper.SupplyManagersMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class LoginService {

    @Autowired
    private LoginMapper loginMapper;

    @Autowired
    private RootdbMapper rootdbMapper;

    @Autowired
    private UsersManagementsMapper usersManagementsMapper; // 销售端 usermanagements

    @Autowired
    private SupplyUsersManagementsMapper supplyUsersManagementsMapper; // 采购端 usermanagements

    @Autowired
    private ManagersMapper managersMapper; // 销售端 managers

    @Autowired
    private SupplyManagersMapper supplyManagersMapper; // 采购端 managers

    public Map<String, Object> authenticate(String projectName, String userName, String password) {
        Map<String, Object> result = new HashMap<>();

        try {
            System.out.println("=== 开始认证过程 ===");
            System.out.println("工位名: " + projectName + ", 用户名: " + userName);

            // 1. 验证登录信息
            Login loginInfo = loginMapper.findByProjectNameAndUserName(projectName, userName);
            System.out.println("登录信息查询结果: " + (loginInfo != null ? "成功" : "失败"));

            if (loginInfo == null) {
                result.put("success", false);
                result.put("message", "用户名或工位名不存在");
                result.put("errorType", "user");
                return result;
            }

            // 2. 验证密码
            boolean passwordCorrect = loginInfo.getPassword().equals(password);
            System.out.println("密码验证: " + (passwordCorrect ? "正确" : "错误"));

            if (!passwordCorrect) {
                result.put("success", false);
                result.put("message", "密码错误");
                result.put("errorType", "password");
                return result;
            }

            // 3. 获取权限信息
            Rootdb rootInfo = rootdbMapper.findByProjectName(projectName);
            System.out.println("权限信息查询结果: " + (rootInfo != null ? "成功" : "失败"));
            System.out.println("权限等级: " + (rootInfo != null ? rootInfo.getRoot() : "无"));

            if (rootInfo == null) {
                result.put("success", false);
                result.put("message", "未找到该职位的权限信息");
                return result;
            }

            // 4. 🔥 关键修改：使用 loginId 来查询负责人信息
            String loginId = String.valueOf(loginInfo.getId()); // 获取 login 表的 id
            System.out.println("登录ID (loginId): " + loginId);

            boolean isSupplySide = isSupplySideProject(projectName);
            System.out.println("🔄 系统识别: " + (isSupplySide ? "采购端" : "销售端"));

            UsersManagements userManagement = null;
            boolean fromManagersTable = false;

            // 4.1 首先尝试从 managers 表查询（使用 loginId 作为 managerId）
            List<Managers> managersList;
            if (isSupplySide) {
                managersList = supplyManagersMapper.selectByUserNameAndManagerId(userName, loginId);
            } else {
                managersList = managersMapper.selectByUserNameAndManagerId(userName, loginId);
            }

            if (managersList != null && !managersList.isEmpty()) {
                // 从 managers 表找到数据
                Managers manager = managersList.get(0);
                if (managersList.size() > 1) {
                    System.out.println("找到多个 managers 记录，数量: " + managersList.size());
                    // 选择最新的记录
                    manager = managersList.stream()
                            .sorted((m1, m2) -> {
                                if (m1.getUpdated_at() != null && m2.getUpdated_at() != null) {
                                    return m2.getUpdated_at().compareTo(m1.getUpdated_at());
                                }
                                return 0;
                            })
                            .findFirst()
                            .orElse(managersList.get(0));
                }

                // 将 Managers 转换为 UsersManagements
                userManagement = convertManagerToUserManagement(manager);
                fromManagersTable = true;
                System.out.println("✅ 从 managers 表获取用户管理信息");
            } else {
                // 4.2 如果 managers 表没有数据，再从 usermanagements 表查询（使用 loginId 作为 managerId）
                List<UsersManagements> userManagementsList;
                if (isSupplySide) {
                    userManagementsList = supplyUsersManagementsMapper.findByUserNameAndManagerId(userName, loginId);
                } else {
                    userManagementsList = usersManagementsMapper.findByUserNameAndManagerId(userName, loginId);
                }

                if (userManagementsList != null && !userManagementsList.isEmpty()) {
                    if (userManagementsList.size() > 1) {
                        System.out.println("找到多个 usermanagements 记录，数量: " + userManagementsList.size());
                        userManagement = userManagementsList.stream()
                                .sorted((u1, u2) -> {
                                    if (u1.getUpdated_at() != null && u2.getUpdated_at() != null) {
                                        return u2.getUpdated_at().compareTo(u1.getUpdated_at());
                                    }
                                    return 0;
                                })
                                .findFirst()
                                .orElse(userManagementsList.get(0));
                    } else {
                        userManagement = userManagementsList.get(0);
                    }
                    System.out.println("✅ 从 usermanagements 表获取用户管理信息");
                }
            }

            if (userManagement == null) {
                result.put("success", false);
                result.put("message", "未找到对应的负责人信息，请检查用户名和密码是否正确！");
                return result;
            }

            // 打印用户管理信息详情
            System.out.println("用户管理信息详情:");
            System.out.println("  - 数据来源: " + (fromManagersTable ? "managers表" : "usermanagements表"));
            System.out.println("  - managerId: " + userManagement.getManagerId());
            System.out.println("  - managercompany: " + userManagement.getManagercompany());
            System.out.println("  - managerdepartment: " + userManagement.getManagerdepartment());
            System.out.println("  - organization: " + userManagement.getOrganization());
            System.out.println("  - role: " + userManagement.getRole());
            System.out.println("  - userName: " + userManagement.getUserName());
            System.out.println("  - assistant: " + userManagement.getAssistant());

            // 5. 生成token（包含端信息）
            String token = generateToken(userName, projectName, isSupplySide);
            System.out.println("生成的token: " + token);

            // 6. 构建返回结果
            result.put("success", true);
            result.put("token", token);
            result.put("root", rootInfo.getRoot());
            result.put("user", buildUserResponse(userManagement));
            result.put("isSupplySide", isSupplySide);
            result.put("fromManagersTable", fromManagersTable); // 新增：标识数据来源
            result.put("loginId", loginId); // 返回 loginId

            // 返回完整的认证信息供前端使用
            Map<String, Object> authInfo = new HashMap<>();
            authInfo.put("managerId", userManagement.getManagerId() != null ? userManagement.getManagerId() : "");
            authInfo.put("company", userManagement.getManagercompany() != null ? userManagement.getManagercompany() : "");
            authInfo.put("department", userManagement.getManagerdepartment() != null ? userManagement.getManagerdepartment() : "");
            authInfo.put("organization", userManagement.getOrganization() != null ? userManagement.getOrganization() : "");
            authInfo.put("role", userManagement.getRole() != null ? userManagement.getRole() : "");
            authInfo.put("userName", userManagement.getUserName() != null ? userManagement.getUserName() : "");
            authInfo.put("assistant", userManagement.getAssistant() != null ? userManagement.getAssistant() : "");

            result.put("authInfo", authInfo);
            System.out.println("✅ 返回完整认证信息: " + authInfo);

            System.out.println("最终返回结果: " + result);
            System.out.println("=== 认证过程结束 ===");

        } catch (Exception e) {
            System.err.println("认证过程中发生异常: " + e.getMessage());
            e.printStackTrace();
            result.put("success", false);
            result.put("message", "登录过程中发生错误: " + e.getMessage());
        }

        return result;
    }

    /**
     * 将 Managers 实体转换为 UsersManagements 实体
     */
    private UsersManagements convertManagerToUserManagement(Managers manager) {
        UsersManagements userManagement = new UsersManagements();
        userManagement.setId(manager.getManager_id());
        userManagement.setUserId(manager.getId()); // 使用企业id作为userId
        userManagement.setManagerId(manager.getManagerId());
        userManagement.setManagercompany(manager.getManagercompany());
        userManagement.setManagerdepartment(manager.getManagerdepartment());
        userManagement.setOrganization(manager.getOrganization());
        userManagement.setRole(manager.getRole());
        userManagement.setRoot(manager.getRoot());
        userManagement.setCreated_at(manager.getCreated_at());
        userManagement.setUpdated_at(manager.getUpdated_at());
        userManagement.setUserName(manager.getUserName());
        userManagement.setAssistant(manager.getAssistant());
        return userManagement;
    }

    /**
     * 判断是否为采购端工位
     */
    private boolean isSupplySideProject(String projectName) {
        if (projectName == null) {
            return false;
        }

        String lowerProjectName = projectName.toLowerCase();
        return lowerProjectName.contains("supply") ||
                lowerProjectName.contains("purchase") ||
                lowerProjectName.contains("procurement") ||
                lowerProjectName.contains("采购");
    }

    /**
     * 生成token，包含端信息
     */
    private String generateToken(String userName, String projectName, boolean isSupplySide) {
        String side = isSupplySide ? "supply" : "sales";
        return System.currentTimeMillis() + "-" + userName + "-" + projectName + "-" + side;
    }

    private Map<String, Object> buildUserResponse(UsersManagements userManagement) {
        Map<String, Object> user = new HashMap<>();
        user.put("managerId", userManagement.getManagerId() != null ? userManagement.getManagerId() : "");
        user.put("managercompany", userManagement.getManagercompany() != null ? userManagement.getManagercompany() : "");
        user.put("managerdepartment", userManagement.getManagerdepartment() != null ? userManagement.getManagerdepartment() : "");
        user.put("organization", userManagement.getOrganization() != null ? userManagement.getOrganization() : "");
        user.put("role", userManagement.getRole() != null ? userManagement.getRole() : "");
        user.put("userName", userManagement.getUserName() != null ? userManagement.getUserName() : "");
        user.put("assistant", userManagement.getAssistant() != null ? userManagement.getAssistant() : "");
        System.out.println("构建的用户响应: " + user);
        return user;
    }
}