using Sharp.NetServer.Attributes;
using Sharp.NetServer.Controllers;
using Sharp.NetServer.Models;

namespace NetServer.Test.Examples.Controllers;

/// <summary>
/// 用户管理控制器示例
/// </summary>
[ApiController]
[Route("api/users")]
[Authorize] // 所有接口默认需要认证
public class UserController : BaseController
{
    // 模拟数据库
    private static readonly List<User> Users = new()
    {
        new User { Id = 1, Name = "张三", Email = "zhangsan@example.com", Role = "Admin" },
        new User { Id = 2, Name = "李四", Email = "lisi@example.com", Role = "User" },
        new User { Id = 3, Name = "王五", Email = "wangwu@example.com", Role = "User" }
    };

    /// <summary>
    /// 获取所有用户（需要 Admin 角色）
    /// GET /api/users
    /// </summary>
    [Authorize(Roles = "Admin")]
    [RateLimit(50, RateLimitScope.User)]
    [HttpGet]
    public async Task GetAllUsersAsync(HttpContext context)
    {
        await WriteSuccessResponseAsync(context, Users);
    }

    /// <summary>
    /// 获取单个用户
    /// GET /api/users/1
    /// </summary>
    [HttpGet("{id}")]
    [ResponseCache(30)] // 缓存 30 秒
    public async Task GetUserByIdAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments.LastOrDefault()?.TrimEnd('/');
        if (int.TryParse(idStr, out var id))
        {
            var user = Users.FirstOrDefault(u => u.Id == id);
            if (user != null)
            {
                await WriteSuccessResponseAsync(context, user);
                return;
            }
        }

        await NotFoundAsync(context, "用户未找到");
    }

    /// <summary>
    /// 创建用户（需要 Admin 角色）
    /// POST /api/users
    /// Body: { "name": "赵六", "email": "zhaoliu@example.com", "role": "User" }
    /// </summary>
    [Authorize(Roles = "Admin")]
    [RateLimit(10, RateLimitScope.User)]
    [HttpPost]
    public async Task CreateUserAsync(HttpContext context)
    {
        var userData = await ReadJsonBodyAsync<User>(context);

        if (userData == null || string.IsNullOrEmpty(userData.Name))
        {
            await BadRequestAsync(context, "无效的用户数据");
            return;
        }

        userData.Id = Users.Max(u => u.Id) + 1;
        Users.Add(userData);

        await WriteSuccessResponseAsync(context, userData, "用户创建成功");
    }

    /// <summary>
    /// 更新用户
    /// PUT /api/users/1
    /// Body: { "name": "新名字", "email": "newemail@example.com" }
    /// </summary>
    [HttpPut("{id}")]
    public async Task UpdateUserAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments.LastOrDefault()?.TrimEnd('/');
        if (!int.TryParse(idStr, out var id))
        {
            await BadRequestAsync(context, "无效的用户ID");
            return;
        }

        var user = Users.FirstOrDefault(u => u.Id == id);
        if (user == null)
        {
            await NotFoundAsync(context, "用户未找到");
            return;
        }

        var updateData = await ReadJsonBodyAsync<User>(context);
        if (updateData != null)
        {
            if (!string.IsNullOrEmpty(updateData.Name))
                user.Name = updateData.Name;
            if (!string.IsNullOrEmpty(updateData.Email))
                user.Email = updateData.Email;
            if (!string.IsNullOrEmpty(updateData.Role))
                user.Role = updateData.Role;
        }

        await WriteSuccessResponseAsync(context, user, "用户更新成功");
    }

    /// <summary>
    /// 删除用户（需要 Admin 角色）
    /// DELETE /api/users/1
    /// </summary>
    [Authorize(Roles = "Admin")]
    [HttpDelete("{id}")]
    public async Task DeleteUserAsync(HttpContext context)
    {
        var idStr = context.Request.Url.Segments.LastOrDefault()?.TrimEnd('/');
        if (!int.TryParse(idStr, out var id))
        {
            await BadRequestAsync(context, "无效的用户ID");
            return;
        }

        var user = Users.FirstOrDefault(u => u.Id == id);
        if (user == null)
        {
            await NotFoundAsync(context, "用户未找到");
            return;
        }

        Users.Remove(user);
        await WriteSuccessResponseAsync(context, new { id }, "用户删除成功");
    }

    /// <summary>
    /// 搜索用户（允许匿名访问）
    /// GET /api/users/search?keyword=张
    /// </summary>
    [AllowAnonymous]
    [RateLimit(100, RateLimitScope.Ip)]
    [HttpGet("search")]
    public async Task SearchUsersAsync(HttpContext context)
    {
        var keyword = GetQueryParam(context, "keyword", "");
        var results = Users.Where(u =>
            u.Name.Contains(keyword, StringComparison.OrdinalIgnoreCase) ||
            u.Email.Contains(keyword, StringComparison.OrdinalIgnoreCase)
        ).ToList();

        await WriteSuccessResponseAsync(context, results);
    }
}

/// <summary>
/// 用户数据模型
/// </summary>
public class User
{
    public int Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public string Email { get; set; } = string.Empty;
    public string Role { get; set; } = "User";
}