package com.ruoyi.common.utils;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.Base64;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.util.PatternMatchUtils;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.constant.HttpStatus;
import com.ruoyi.common.core.domain.entity.SysRole;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.exception.ServiceException;

/**
 * 安全服务工具类
 * 
 * @author ruoyi
 */
public class SecurityUtils
{

    /**
     * 用户ID
     **/
    public static Long getUserId()
    {
        try
        {
            return getLoginUser().getUserId();
        }
        catch (Exception e)
        {
            throw new ServiceException("获取用户ID异常", HttpStatus.UNAUTHORIZED);
        }
    }

    /**
     * 获取部门ID
     **/
    public static Long getDeptId()
    {
        try
        {
            return getLoginUser().getDeptId();
        }
        catch (Exception e)
        {
            throw new ServiceException("获取部门ID异常", HttpStatus.UNAUTHORIZED);
        }
    }

    /**
     * 获取用户账户
     **/
    public static String getUsername()
    {
        try
        {
            return getLoginUser().getUsername();
        }
        catch (Exception e)
        {
            throw new ServiceException("获取用户账户异常", HttpStatus.UNAUTHORIZED);
        }
    }

    /**
     * 获取用户
     **/
    public static LoginUser getLoginUser()
    {
        try
        {
            return (LoginUser) getAuthentication().getPrincipal();
        }
        catch (Exception e)
        {
            throw new ServiceException("获取用户信息异常", HttpStatus.UNAUTHORIZED);
        }
    }

    /**
     * 获取Authentication
     */
    public static Authentication getAuthentication()
    {
        return SecurityContextHolder.getContext().getAuthentication();
    }
    // 可选的加盐密钥，可以从配置文件中读取
    private static final String SM3_SECRET = "your-sm3-secret-key";

    /**
     * 生成BCryptPasswordEncoder密码
     *
     * @param password 密码
     * @return 加密字符串
     */
    public static String encryptPassword(String password)
    {
/*        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
        return passwordEncoder.encode(password);*/
        try {
            // 密码+密钥进行SM3哈希
            String passwordToEncode = password + SM3_SECRET;

            MessageDigest sm3 = MessageDigest.getInstance("SM3", "BC");
            byte[] hash = sm3.digest(passwordToEncode.getBytes(StandardCharsets.UTF_8));

            // Base64编码存储
            return Base64.getEncoder().encodeToString(hash);
        } catch (Exception e) {
            throw new RuntimeException("SM3密码加密失败", e);
        }

    }

    /**
     * 判断密码是否相同
     *
     * @param rawPassword 真实密码
     * @param encodedPassword 加密后字符
     * @return 结果
     */
    public static boolean matchesPassword(String rawPassword, String encodedPassword)
    {
/*        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
        return passwordEncoder.matches(rawPassword, encodedPassword);*/
        if (rawPassword == null || encodedPassword == null) {
            return false;
        }

        try {
            // 使用相同的逻辑计算输入密码的哈希值
            String passwordToCheck = rawPassword + SM3_SECRET;

            MessageDigest sm3 = MessageDigest.getInstance("SM3", "BC");
            byte[] hash = sm3.digest(passwordToCheck.getBytes(StandardCharsets.UTF_8));
            String checkEncoded = Base64.getEncoder().encodeToString(hash);

            return encodedPassword.equals(checkEncoded);
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * 是否为管理员
     * 
     * @param userId 用户ID
     * @return 结果
     */
    public static boolean isAdmin(Long userId)
    {
        return userId != null && 1L == userId;
    }

    /**
     * 验证用户是否具备某权限
     * 
     * @param permission 权限字符串
     * @return 用户是否具备某权限
     */
    public static boolean hasPermi(String permission)
    {
        return hasPermi(getLoginUser().getPermissions(), permission);
    }

    /**
     * 判断是否包含权限
     * 
     * @param authorities 权限列表
     * @param permission 权限字符串
     * @return 用户是否具备某权限
     */
    public static boolean hasPermi(Collection<String> authorities, String permission)
    {
        return authorities.stream().filter(StringUtils::hasText)
                .anyMatch(x -> Constants.ALL_PERMISSION.equals(x) || PatternMatchUtils.simpleMatch(x, permission));
    }

    /**
     * 验证用户是否拥有某个角色
     * 
     * @param role 角色标识
     * @return 用户是否具备某角色
     */
    public static boolean hasRole(String role)
    {
        List<SysRole> roleList = getLoginUser().getUser().getRoles();
        Collection<String> roles = roleList.stream().map(SysRole::getRoleKey).collect(Collectors.toSet());
        return hasRole(roles, role);
    }

    /**
     * 判断是否包含角色
     * 
     * @param roles 角色列表
     * @param role 角色
     * @return 用户是否具备某角色权限
     */
    public static boolean hasRole(Collection<String> roles, String role)
    {
        return roles.stream().filter(StringUtils::hasText)
                .anyMatch(x -> Constants.SUPER_ADMIN.equals(x) || PatternMatchUtils.simpleMatch(x, role));
    }

}