namespace LingAdmin.Shared.DTOs;

/// <summary>
/// 统一 API 响应包装器
/// </summary>
/// <typeparam name="T">数据类型</typeparam>
public class ApiResponse<T>
{
    public bool Success { get; set; }
    public T? Data { get; set; }
    public string? Message { get; set; }
    public int Code { get; set; }
    public List<string>? Errors { get; set; }
    public DateTime Timestamp { get; set; } = DateTime.UtcNow;
    public string? TraceId { get; set; }

    public static ApiResponse<T> Ok(T data, string? message = null)
    {
        return new ApiResponse<T>
        {
            Success = true,
            Data = data,
            Message = message,
            Code = 200
        };
    }

    public static ApiResponse<T> Created(T data, string? message = null)
    {
        return new ApiResponse<T>
        {
            Success = true,
            Data = data,
            Message = message ?? "Created successfully",
            Code = 201
        };
    }

    public static ApiResponse<T> Error(string message, int code = 400, List<string>? errors = null)
    {
        return new ApiResponse<T>
        {
            Success = false,
            Message = message,
            Code = code,
            Errors = errors
        };
    }

    public static ApiResponse<T> NotFound(string message = "Resource not found")
    {
        return new ApiResponse<T>
        {
            Success = false,
            Message = message,
            Code = 404
        };
    }

    public static ApiResponse<T> Unauthorized(string message = "Unauthorized")
    {
        return new ApiResponse<T>
        {
            Success = false,
            Message = message,
            Code = 401
        };
    }

    public static ApiResponse<T> Forbidden(string message = "Forbidden")
    {
        return new ApiResponse<T>
        {
            Success = false,
            Message = message,
            Code = 403
        };
    }
}

/// <summary>
/// 分页请求
/// </summary>
public class PaginationRequest
{
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 10;
    public string? SortBy { get; set; }
    public bool SortDescending { get; set; } = false;
    public string? Search { get; set; }
}

/// <summary>
/// 分页响应
/// </summary>
/// <typeparam name="T">数据类型</typeparam>
public class PaginatedResponse<T>
{
    public List<T> Items { get; set; } = new();
    public int TotalCount { get; set; }
    public int Page { get; set; }
    public int PageSize { get; set; }
    public int TotalPages => (int)Math.Ceiling((double)TotalCount / PageSize);
    public bool HasPrevious => Page > 1;
    public bool HasNext => Page < TotalPages;
}