using System;
using System.Collections.Generic;
using System.Threading;
using UnityEngine;

namespace Kill.Network
{
    /// <summary>
    /// HTTP请求方法枚举
    /// </summary>
    public enum HttpMethod
    {
        GET,
        POST,
        PUT,
        DELETE,
        PATCH,
        HEAD,
        OPTIONS
    }

    /// <summary>
    /// 网络连接状态
    /// </summary>
    public enum NetworkConnectivityState
    {
        /// <summary>无网络连接</summary>
        Disconnected,
        /// <summary>通过WiFi连接</summary>
        Wifi,
        /// <summary>通过移动数据连接</summary>
        Cellular,
        /// <summary>未知连接类型</summary>
        Unknown
    }

    /// <summary>
    /// 请求优先级
    /// </summary>
    public enum RequestPriority
    {
        Low = 0,
        Normal = 1,
        High = 2,
        Critical = 3
    }

    /// <summary>
    /// HTTP响应包装类
    /// </summary>
    public class HttpResponse<T>
    {
        /// <summary>是否请求成功</summary>
        public bool IsSuccess { get; set; }
        /// <summary>HTTP状态码</summary>
        public long StatusCode { get; set; }
        /// <summary>响应数据</summary>
        public T Data { get; set; }
        /// <summary>错误信息</summary>
        public string ErrorMessage { get; set; }
        /// <summary>响应头</summary>
        public Dictionary<string, string> Headers { get; set; }
        /// <summary>原始响应文本</summary>
        public string RawResponse { get; set; }
        /// <summary>请求耗时(毫秒)</summary>
        public long ElapsedMilliseconds { get; set; }

        public static HttpResponse<T> Success(T data, long statusCode = 200)
        {
            return new HttpResponse<T>
            {
                IsSuccess = true,
                StatusCode = statusCode,
                Data = data
            };
        }

        public static HttpResponse<T> Failure(string errorMessage, long statusCode = 0)
        {
            return new HttpResponse<T>
            {
                IsSuccess = false,
                StatusCode = statusCode,
                ErrorMessage = errorMessage
            };
        }
    }

    /// <summary>
    /// HTTP请求配置
    /// </summary>
    public class HttpRequestConfig
    {
        /// <summary>请求超时时间(秒)</summary>
        public int Timeout { get; set; } = 30;
        /// <summary>最大重试次数</summary>
        public int MaxRetries { get; set; } = 3;
        /// <summary>重试延迟基数(毫秒)</summary>
        public int RetryDelayMs { get; set; } = 1000;
        /// <summary>是否使用指数退避</summary>
        public bool UseExponentialBackoff { get; set; } = true;
        /// <summary>自定义请求头</summary>
        public Dictionary<string, string> Headers { get; set; } = new Dictionary<string, string>();
        /// <summary>请求优先级</summary>
        public RequestPriority Priority { get; set; } = RequestPriority.Normal;
        /// <summary>是否缓存响应</summary>
        public bool EnableCache { get; set; } = false;
        /// <summary>缓存时间(秒)</summary>
        public int CacheDuration { get; set; } = 300;
    }

    /// <summary>
    /// 网络请求任务
    /// </summary>
    public class NetworkRequestTask
    {
        public string Id { get; private set; }
        public string Url { get; set; }
        public HttpMethod Method { get; set; }
        public object Data { get; set; }
        public HttpRequestConfig Config { get; set; }
        public RequestPriority Priority { get; set; }
        public DateTime CreateTime { get; private set; }
        public CancellationTokenSource CancellationToken { get; set; }

        public NetworkRequestTask()
        {
            Id = Guid.NewGuid().ToString("N");
            CreateTime = DateTime.Now;
            CancellationToken = new CancellationTokenSource();
        }
    }

    /// <summary>
    /// 网络状态变化事件参数
    /// </summary>
    public class NetworkStateChangedEventArgs : EventArgs
    {
        public NetworkConnectivityState PreviousState { get; set; }
        public NetworkConnectivityState CurrentState { get; set; }
        public bool IsConnected { get; set; }
        public DateTime ChangeTime { get; set; }
    }

    /// <summary>
    /// 下载进度信息
    /// </summary>
    public class DownloadProgress
    {
        /// <summary>已下载字节数</summary>
        public long DownloadedBytes { get; set; }
        /// <summary>总字节数</summary>
        public long TotalBytes { get; set; }
        /// <summary>下载速度(字节/秒)</summary>
        public float Speed { get; set; }
        /// <summary>预计剩余时间(秒)</summary>
        public float RemainingSeconds { get; set; }
        /// <summary>下载进度(0-1)</summary>
        public float Progress => TotalBytes > 0 ? (float)DownloadedBytes / TotalBytes : 0;
        /// <summary>进度百分比</summary>
        public float ProgressPercentage => Progress * 100;
    }

    /// <summary>
    /// 上传进度信息
    /// </summary>
    public class UploadProgress
    {
        /// <summary>已上传字节数</summary>
        public long UploadedBytes { get; set; }
        /// <summary>总字节数</summary>
        public long TotalBytes { get; set; }
        /// <summary>上传速度(字节/秒)</summary>
        public float Speed { get; set; }
        /// <summary>上传进度(0-1)</summary>
        public float Progress => TotalBytes > 0 ? (float)UploadedBytes / TotalBytes : 0;
    }
}