using System;
using System.Diagnostics;
using MySql.Data.MySqlClient;
using Dapper;

namespace 全自动水压检测仪.DATA
{
    /// <summary>
    /// 登录调试辅助类
    /// 用于测试和调试登录功能
    /// </summary>
    public static class LoginDebugHelper
    {
        private static readonly string _connectionString = "Server=localhost;Database=fullautowaterpressure;User=root;Password=123456;port=3306;charset=utf8;";

        /// <summary>
        /// 测试密码加密和验证
        /// </summary>
        public static void TestPasswordEncryption()
        {
            Debug.WriteLine("=== 测试密码加密 ===");
            
            // 测试 admin123
            string salt1 = PasswordHelper.GenerateSalt();
            string hash1 = PasswordHelper.HashPassword("admin123", salt1);
            bool verify1 = PasswordHelper.VerifyPassword("admin123", hash1, salt1);
            
            Debug.WriteLine($"密码: admin123");
            Debug.WriteLine($"盐值: {salt1}");
            Debug.WriteLine($"哈希: {hash1}");
            Debug.WriteLine($"验证: {verify1}");
            Debug.WriteLine("");
            
            // 测试 123
            string salt2 = PasswordHelper.GenerateSalt();
            string hash2 = PasswordHelper.HashPassword("123", salt2);
            bool verify2 = PasswordHelper.VerifyPassword("123", hash2, salt2);
            
            Debug.WriteLine($"密码: 123");
            Debug.WriteLine($"盐值: {salt2}");
            Debug.WriteLine($"哈希: {hash2}");
            Debug.WriteLine($"验证: {verify2}");
        }

        /// <summary>
        /// 查看数据库中的用户信息
        /// </summary>
        public static void ShowDatabaseUsers()
        {
            try
            {
                using (var connection = new MySqlConnection(_connectionString))
                {
                    connection.Open();
                    
                    var users = connection.Query<User>("SELECT * FROM sys_users");
                    
                    Debug.WriteLine("=== 数据库用户列表 ===");
                    foreach (var user in users)
                    {
                        Debug.WriteLine($"ID: {user.Id}");
                        Debug.WriteLine($"用户名: {user.Username}");
                        Debug.WriteLine($"角色: {(user.UserRole == 1 ? "管理员" : "普通用户")}");
                        Debug.WriteLine($"状态: {(user.Status == 1 ? "启用" : "禁用")}");
                        Debug.WriteLine($"密码哈希: {user.PasswordHash}");
                        Debug.WriteLine($"盐值: {user.Salt}");
                        Debug.WriteLine($"创建时间: {user.CreateTime}");
                        Debug.WriteLine("---");
                    }
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"查询用户失败: {ex.Message}");
            }
        }

        /// <summary>
        /// 重置所有默认用户
        /// </summary>
        public static void ResetDefaultUsers()
        {
            try
            {
                using (var connection = new MySqlConnection(_connectionString))
                {
                    connection.Open();
                    
                    // 删除现有用户
                    connection.Execute("DELETE FROM sys_users WHERE username IN ('admin', 'csi')");
                    Debug.WriteLine("已删除现有默认用户");
                    
                    // 重新创建 admin
                    string salt1 = PasswordHelper.GenerateSalt();
                    string hash1 = PasswordHelper.HashPassword("admin123", salt1);
                    connection.Execute(@"
                        INSERT INTO sys_users (username, password_hash, salt, user_role, status, create_time)
                        VALUES (@username, @hash, @salt, @role, 1, NOW())",
                        new { username = "admin", hash = hash1, salt = salt1, role = 1 });
                    Debug.WriteLine("✓ 创建管理员: admin / admin123");
                    
                    // 重新创建 cgx
                    string salt2 = PasswordHelper.GenerateSalt();
                    string hash2 = PasswordHelper.HashPassword("123456", salt2);
                    connection.Execute(@"
                        INSERT INTO sys_users (username, password_hash, salt, user_role, status, create_time)
                        VALUES (@username, @hash, @salt, @role, 1, NOW())",
                        new { username = "csi", hash = hash2, salt = salt2, role = 0 });
                    Debug.WriteLine("✓ 创建普通用户: csi / 123456");
                    
                    Debug.WriteLine("默认用户重置完成！");
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"重置用户失败: {ex.Message}");
            }
        }

        /// <summary>
        /// 测试登录
        /// </summary>
        public static void TestLogin(string username, string password)
        {
            try
            {
                Debug.WriteLine($"=== 测试登录: {username} ===");
                
                var repository = new UserRepository();
                var user = repository.GetUserByUsername(username);
                
                if (user == null)
                {
                    Debug.WriteLine("❌ 用户不存在");
                    return;
                }
                
                Debug.WriteLine($"✓ 找到用户: {user.Username}");
                Debug.WriteLine($"  角色: {(user.UserRole == 1 ? "管理员" : "普通用户")}");
                Debug.WriteLine($"  状态: {(user.Status == 1 ? "启用" : "禁用")}");
                Debug.WriteLine($"  密码哈希: {user.PasswordHash}");
                Debug.WriteLine($"  盐值: {user.Salt}");
                
                bool isValid = PasswordHelper.VerifyPassword(password, user.PasswordHash, user.Salt);
                
                if (isValid)
                {
                    Debug.WriteLine("✓ 密码验证成功！");
                }
                else
                {
                    Debug.WriteLine("❌ 密码验证失败！");
                    
                    // 测试重新生成哈希
                    string testHash = PasswordHelper.HashPassword(password, user.Salt);
                    Debug.WriteLine($"  输入密码的哈希: {testHash}");
                    Debug.WriteLine($"  数据库的哈希: {user.PasswordHash}");
                    Debug.WriteLine($"  是否匹配: {testHash == user.PasswordHash}");
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"测试登录失败: {ex.Message}");
            }
        }
    }
}