package com.ruoyi.framework.security.service;

import javax.annotation.Resource;

import com.ruoyi.framework.web.domain.AjaxResult;
import com.ruoyi.project.system.mapper.SysUserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.exception.user.BlackListException;
import com.ruoyi.common.exception.user.CaptchaException;
import com.ruoyi.common.exception.user.CaptchaExpireException;
import com.ruoyi.common.exception.user.UserNotExistsException;
import com.ruoyi.common.exception.user.UserPasswordNotMatchException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.ip.IpUtils;
import com.ruoyi.framework.manager.AsyncManager;
import com.ruoyi.framework.manager.factory.AsyncFactory;
import com.ruoyi.framework.redis.RedisCache;
import com.ruoyi.framework.security.LoginUser;
import com.ruoyi.framework.security.context.AuthenticationContextHolder;
import com.ruoyi.project.system.domain.SysUser;
import com.ruoyi.project.system.service.ISysConfigService;
import com.ruoyi.project.system.service.ISysUserService;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * 登录校验方法
 * 
 * @author ruoyi
 */
@Component
public class SysLoginService
{
    private static final Logger log = LoggerFactory.getLogger(SysLoginService.class);

    @Autowired
    private TokenService tokenService;

    @Autowired
    private UserDetailsServiceImpl userDetailsService;

    @Resource
    private AuthenticationManager authenticationManager;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysUserService userService;

    @Autowired
    private ISysConfigService configService;

    /**
     * 登录验证
     * 
     * @param username 用户名
     * @param password 密码
     * @param code 验证码
     * @param uuid 唯一标识
     * @return 结果
     */
    public String login(String username, String password, String code, String uuid)
    {
        // 验证码校验
//        validateCaptcha(username, code, uuid);
        // 登录前置校验
        loginPreCheck(username, password);
        // 用户验证
        Authentication authentication = null;
        try
        {
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);
            AuthenticationContextHolder.setContext(authenticationToken);
            // 该方法会去调用UserDetailsServiceImpl.loadUserByUsername
            authentication = authenticationManager.authenticate(authenticationToken);
        }
        catch (Exception e)
        {
            if (e instanceof BadCredentialsException)
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
                throw new UserPasswordNotMatchException();
            }
            else
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
                throw new ServiceException(e.getMessage());
            }
        }
        finally
        {
            AuthenticationContextHolder.clearContext();
        }
        AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));
        LoginUser loginUser = (LoginUser) authentication.getPrincipal();
        recordLoginInfo(loginUser.getUserId());
        // 生成token
        return tokenService.createToken(loginUser);
    }

    /**
     * 校验验证码
     * 
     * @param username 用户名
     * @param code 验证码
     * @param uuid 唯一标识
     * @return 结果
     */
    public void validateCaptcha(String username, String code, String uuid)
    {
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        if (captchaEnabled)
        {
            String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
            String captcha = redisCache.getCacheObject(verifyKey);
            if (captcha == null)
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.expire")));
                throw new CaptchaExpireException();
            }
            redisCache.deleteObject(verifyKey);
            if (!code.equalsIgnoreCase(captcha))
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
                throw new CaptchaException();
            }
        }
    }

    /**
     * 登录前置校验
     * @param username 用户名
     * @param password 用户密码
     */
    public void loginPreCheck(String username, String password)
    {
        // 用户名或密码为空 错误
        if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password))
        {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("not.null")));
            throw new UserNotExistsException();
        }
        // 密码如果不在指定范围内 错误
        if (password.length() < UserConstants.PASSWORD_MIN_LENGTH
                || password.length() > UserConstants.PASSWORD_MAX_LENGTH)
        {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // 用户名不在指定范围内 错误
        if (username.length() < UserConstants.USERNAME_MIN_LENGTH
                || username.length() > UserConstants.USERNAME_MAX_LENGTH)
        {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // IP黑名单校验
        String blackStr = configService.selectConfigByKey("sys.login.blackIPList");
        if (IpUtils.isMatchedIp(blackStr, IpUtils.getIpAddr()))
        {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("login.blocked")));
            throw new BlackListException();
        }
    }

    /**
     * 记录登录信息
     *
     * @param userId 用户ID
     */
    public void recordLoginInfo(Long userId)
    {
        SysUser sysUser = new SysUser();
        sysUser.setUserId(userId);
        sysUser.setLoginIp(IpUtils.getIpAddr());
        sysUser.setLoginDate(DateUtils.getNowDate());
        userService.updateUserProfile(sysUser);
    }

    public Long loginCheck(String username, String password){
        loginPreCheck(username, password);
        // 用户验证
        Authentication authentication = null;
        try
        {
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);
            AuthenticationContextHolder.setContext(authenticationToken);
            // 该方法会去调用UserDetailsServiceImpl.loadUserByUsername
            authentication = authenticationManager.authenticate(authenticationToken);
        }
        catch (Exception e)
        {
            if (e instanceof BadCredentialsException)
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
                throw new UserPasswordNotMatchException();
            }
            else
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
                throw new ServiceException(e.getMessage());
            }
        }
        finally
        {
            AuthenticationContextHolder.clearContext();
        }
        LoginUser loginUser = (LoginUser) authentication.getPrincipal();
        return loginUser.getUserId();
    }

    @Autowired
    private SysUserMapper sysUserMapper;

    /**
     * 登录验证
     *
     * @param username 用户名
     * @param password 密码
     * @param factoryId 公司ID
     * @return 结果
     */
    public String loginCheckFactory(String username, String password, Long factoryId)
    {
        // 登录前置校验
        loginPreCheck(username, password);
        // 用户验证
        Authentication authentication = null;
        try
        {
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);
            // 扩展细节：将 companyId 放入 details（可选方式）
            // 使用 Map 存储额外信息
            Map<String, Object> details = new HashMap<>();
            details.put("factoryId", factoryId);
            authenticationToken.setDetails(details);
            SecurityContextHolder.getContext().setAuthentication(authenticationToken);
            AuthenticationContextHolder.setContext(authenticationToken);
            // 该方法会去调用UserDetailsServiceImpl.loadUserByUsername
            authentication = authenticationManager.authenticate(authenticationToken);
        }
        catch (Exception e)
        {
            if (e instanceof BadCredentialsException)
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
                throw new UserPasswordNotMatchException();
            }
            else
            {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
                throw new ServiceException(e.getMessage());
            }
        }
        finally
        {
            AuthenticationContextHolder.clearContext();
        }
        AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));
        LoginUser loginUser = (LoginUser) authentication.getPrincipal();
        recordLoginInfo(loginUser.getUserId());
        // 更新用户信息，修改当前选中公司
        SysUser user = loginUser.getUser();
        if(factoryId != null){
            user.setTenantId(factoryId);
        }else{
            user.setTenantId(tokenService.getDeptIdsByUserId(user.getUserId())[0]);
        }
        sysUserMapper.updateUser(user);
        // 生成token
        return tokenService.createToken(loginUser);
    }

    /**
     * 浪潮门户 SSO 免密登录
     * <p>
     * 背景：浪潮 OSS 通过 /tide/tideLogin 把 code 换成 token，再取到 tenant 信息后，
     * 原本调用 login(username, password, code, uuid) 用 tenantAccount + tenantPassword
     * 做本地登录。但 tenantPassword 是浪潮系统详情里单独配置的值，与本地 sys_user.password
     * 一旦不一致（浪潮侧改密码、本地重置密码、账号由 applicationOrdering 创建后改过密码等），
     * 就会报「租户账号[xxx]在系统中登录失败(用户不存在/密码错误)」，导致门户整条登录链路断掉。
     * <p>
     * 鉴权实际上在浪潮侧已经完成（能拿到有效 token 和 userInfo 就说明身份可信），
     * 本地无需再次校验密码。这里直接按用户名加载用户并签发本系统 token。
     * <p>
     * 仍然保留的校验：用户不存在、已删除、已停用 —— 这三种情况拒绝登录。
     *
     * @param username 浪潮返回的租户账号（tenantAccount）
     * @return 本系统 token
     */
    public String ssoLogin(String username)
    {
        SysUser user = userService.selectUserByUserName(username);
        if (StringUtils.isNull(user))
        {
            log.info("SSO 登录：用户 {} 不存在.", username);
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL,
                    MessageUtils.message("user.not.exists")));
            throw new UserNotExistsException();
        }
        if (UserStatus.DELETED.getCode().equals(user.getDelFlag()))
        {
            log.info("SSO 登录：用户 {} 已被删除.", username);
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL,
                    MessageUtils.message("user.password.delete")));
            throw new ServiceException(MessageUtils.message("user.password.delete"));
        }
        if (UserStatus.DISABLE.getCode().equals(user.getStatus()))
        {
            log.info("SSO 登录：用户 {} 已被停用.", username);
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL,
                    MessageUtils.message("user.blocked")));
            throw new ServiceException(MessageUtils.message("user.blocked"));
        }
        // 免密：直接构造 LoginUser（不调用 passwordService.validate）
        LoginUser loginUser = (LoginUser) userDetailsService.createLoginUser(user);
        AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS,
                "浪潮门户 SSO 登录"));
        recordLoginInfo(user.getUserId());
        return tokenService.createToken(loginUser);
    }

}