/**
 * 用户管理控制器
 * @description 处理用户管理相关的 HTTP 请求
 */

import { FastifyRequest, FastifyReply } from 'fastify';
import { logger } from '../../../common/logging/index.js';
import * as userService from '../services/userService.js';
import {
  ListUsersQuery,
  CreateUserRequest,
  UpdateUserRequest,
  AssignTenantRequest,
  UpdateUserModulesRequest,
  ImportUserRow,
} from '../types/user.types.js';

/**
 * 获取用户列表
 */
export async function listUsers(
  request: FastifyRequest<{ Querystring: ListUsersQuery }>,
  reply: FastifyReply
) {
  try {
    const user = request.user!;
    const scope = await userService.getUserQueryScope(user.role, user.tenantId, user.userId);
    const result = await userService.listUsers(request.query, scope);

    return reply.send({
      code: 0,
      message: 'success',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] listUsers error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '获取用户列表失败',
    });
  }
}

/**
 * 获取用户详情
 */
export async function getUserById(
  request: FastifyRequest<{ Params: { id: string } }>,
  reply: FastifyReply
) {
  try {
    const user = request.user!;
    const scope = await userService.getUserQueryScope(user.role, user.tenantId, user.userId);
    const result = await userService.getUserById(request.params.id, scope);

    if (!result) {
      return reply.status(404).send({
        code: 404,
        message: '用户不存在',
      });
    }

    return reply.send({
      code: 0,
      message: 'success',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] getUserById error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '获取用户详情失败',
    });
  }
}

/**
 * 创建用户
 */
export async function createUser(
  request: FastifyRequest<{ Body: CreateUserRequest }>,
  reply: FastifyReply
) {
  try {
    const creator = request.user!;
    
    // HOSPITAL_ADMIN 和 PHARMA_ADMIN 只能在自己的租户内创建用户
    if (
      (creator.role === 'HOSPITAL_ADMIN' || creator.role === 'PHARMA_ADMIN') &&
      request.body.tenantId !== creator.tenantId
    ) {
      return reply.status(403).send({
        code: 403,
        message: '无权限在其他租户创建用户',
      });
    }

    const result = await userService.createUser(request.body, creator.userId);

    return reply.status(201).send({
      code: 0,
      message: '用户创建成功',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] createUser error:', error);
    
    if (error.message.includes('已存在')) {
      return reply.status(400).send({
        code: 400,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '创建用户失败',
    });
  }
}

/**
 * 更新用户
 */
export async function updateUser(
  request: FastifyRequest<{ Params: { id: string }; Body: UpdateUserRequest }>,
  reply: FastifyReply
) {
  try {
    const updater = request.user!;
    const scope = await userService.getUserQueryScope(updater.role, updater.tenantId, updater.userId);
    
    const result = await userService.updateUser(
      request.params.id,
      request.body,
      scope,
      updater.userId
    );

    return reply.send({
      code: 0,
      message: '用户更新成功',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] updateUser error:', error);

    if (error.message.includes('不存在') || error.message.includes('无权限')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    if (error.message.includes('已存在')) {
      return reply.status(400).send({
        code: 400,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '更新用户失败',
    });
  }
}

/**
 * 更新用户状态（启用/禁用）
 */
export async function updateUserStatus(
  request: FastifyRequest<{
    Params: { id: string };
    Body: { status: 'active' | 'disabled' };
  }>,
  reply: FastifyReply
) {
  try {
    const updater = request.user!;
    const scope = await userService.getUserQueryScope(updater.role, updater.tenantId, updater.userId);

    await userService.updateUserStatus(
      request.params.id,
      request.body.status,
      scope,
      updater.userId
    );

    return reply.send({
      code: 0,
      message: request.body.status === 'active' ? '用户已启用' : '用户已禁用',
    });
  } catch (error: any) {
    logger.error('[UserController] updateUserStatus error:', error);

    if (error.message.includes('不存在') || error.message.includes('无权限')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '更新状态失败',
    });
  }
}

/**
 * 重置用户密码
 */
export async function resetUserPassword(
  request: FastifyRequest<{ Params: { id: string } }>,
  reply: FastifyReply
) {
  try {
    const resetter = request.user!;
    const scope = await userService.getUserQueryScope(resetter.role, resetter.tenantId, resetter.userId);

    await userService.resetUserPassword(request.params.id, scope, resetter.userId);

    return reply.send({
      code: 0,
      message: '密码已重置为默认密码',
    });
  } catch (error: any) {
    logger.error('[UserController] resetUserPassword error:', error);

    if (error.message.includes('不存在') || error.message.includes('无权限')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '重置密码失败',
    });
  }
}

/**
 * 分配租户给用户
 */
export async function assignTenantToUser(
  request: FastifyRequest<{
    Params: { id: string };
    Body: AssignTenantRequest;
  }>,
  reply: FastifyReply
) {
  try {
    const assigner = request.user!;

    // 只有 SUPER_ADMIN 可以分配租户
    if (assigner.role !== 'SUPER_ADMIN') {
      return reply.status(403).send({
        code: 403,
        message: '无权限分配租户',
      });
    }

    await userService.assignTenantToUser(request.params.id, request.body, assigner.userId);

    return reply.send({
      code: 0,
      message: '租户分配成功',
    });
  } catch (error: any) {
    logger.error('[UserController] assignTenantToUser error:', error);

    if (error.message.includes('不存在')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    if (error.message.includes('已是')) {
      return reply.status(400).send({
        code: 400,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '分配租户失败',
    });
  }
}

/**
 * 从租户移除用户
 */
export async function removeTenantFromUser(
  request: FastifyRequest<{
    Params: { id: string; tenantId: string };
  }>,
  reply: FastifyReply
) {
  try {
    const remover = request.user!;

    // 只有 SUPER_ADMIN 可以移除租户
    if (remover.role !== 'SUPER_ADMIN') {
      return reply.status(403).send({
        code: 403,
        message: '无权限移除租户',
      });
    }

    await userService.removeTenantFromUser(
      request.params.id,
      request.params.tenantId,
      remover.userId
    );

    return reply.send({
      code: 0,
      message: '租户移除成功',
    });
  } catch (error: any) {
    logger.error('[UserController] removeTenantFromUser error:', error);

    if (error.message.includes('不存在') || error.message.includes('不是')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    if (error.message.includes('不能移除')) {
      return reply.status(400).send({
        code: 400,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '移除租户失败',
    });
  }
}

/**
 * 更新用户在指定租户的模块权限
 */
export async function updateUserModules(
  request: FastifyRequest<{
    Params: { id: string };
    Body: UpdateUserModulesRequest;
  }>,
  reply: FastifyReply
) {
  try {
    const updater = request.user!;

    // SUPER_ADMIN 可以操作任意租户
    // HOSPITAL_ADMIN/PHARMA_ADMIN 只能操作自己租户的用户
    if (
      updater.role !== 'SUPER_ADMIN' &&
      request.body.tenantId !== updater.tenantId
    ) {
      return reply.status(403).send({
        code: 403,
        message: '无权限修改其他租户的用户模块权限',
      });
    }

    await userService.updateUserModules(request.params.id, request.body, updater.userId);

    return reply.send({
      code: 0,
      message: '模块权限更新成功',
    });
  } catch (error: any) {
    logger.error('[UserController] updateUserModules error:', error);

    if (error.message.includes('不是')) {
      return reply.status(404).send({
        code: 404,
        message: error.message,
      });
    }

    if (error.message.includes('不在')) {
      return reply.status(400).send({
        code: 400,
        message: error.message,
      });
    }

    return reply.status(500).send({
      code: 500,
      message: error.message || '更新模块权限失败',
    });
  }
}

/**
 * 批量导入用户
 */
export async function importUsers(
  request: FastifyRequest<{
    Body: {
      users: ImportUserRow[];
      defaultTenantId?: string;
      autoInheritModules?: boolean;
    };
  }>,
  reply: FastifyReply
) {
  try {
    const importer = request.user!;
    const autoInheritModules = request.body.autoInheritModules ?? true;

    // 确定默认租户
    let defaultTenantId = request.body.defaultTenantId;
    if (!defaultTenantId) {
      if (importer.role === 'SUPER_ADMIN') {
        return reply.status(400).send({
          code: 400,
          message: '请指定默认租户',
        });
      }
      defaultTenantId = importer.tenantId;
    }

    // HOSPITAL_ADMIN/PHARMA_ADMIN 只能导入到自己的租户
    if (
      (importer.role === 'HOSPITAL_ADMIN' || importer.role === 'PHARMA_ADMIN') &&
      defaultTenantId !== importer.tenantId
    ) {
      return reply.status(403).send({
        code: 403,
        message: '无权限导入到其他租户',
      });
    }

    const result = await userService.importUsers(
      request.body.users,
      defaultTenantId,
      importer.userId,
      autoInheritModules
    );

    return reply.send({
      code: 0,
      message: `导入完成：成功 ${result.success} 条，失败 ${result.failed} 条`,
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] importUsers error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '批量导入失败',
    });
  }
}

/**
 * 获取所有租户列表（用于下拉选择）
 */
export async function getAllTenants(request: FastifyRequest, reply: FastifyReply) {
  try {
    const result = await userService.getAllTenants();
    return reply.send({
      code: 0,
      message: 'success',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] getAllTenants error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '获取租户列表失败',
    });
  }
}

/**
 * 获取租户的科室列表（用于下拉选择）
 */
export async function getDepartmentsByTenant(
  request: FastifyRequest<{ Params: { tenantId: string } }>,
  reply: FastifyReply
) {
  try {
    const result = await userService.getDepartmentsByTenant(request.params.tenantId);
    return reply.send({
      code: 0,
      message: 'success',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] getDepartmentsByTenant error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '获取科室列表失败',
    });
  }
}

/**
 * 获取租户的模块列表（用于模块配置）
 */
export async function getModulesByTenant(
  request: FastifyRequest<{ Params: { tenantId: string } }>,
  reply: FastifyReply
) {
  try {
    const result = await userService.getModulesByTenant(request.params.tenantId);
    return reply.send({
      code: 0,
      message: 'success',
      data: result,
    });
  } catch (error: any) {
    logger.error('[UserController] getModulesByTenant error:', error);
    return reply.status(500).send({
      code: 500,
      message: error.message || '获取模块列表失败',
    });
  }
}