using Cysharp.Threading.Tasks;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;
using Random = UnityEngine.Random;

namespace AutoConfig
{
    public class WPExcelDownloader
    {

        private Dictionary<string, string> _headers = new Dictionary<string, string>() {
            { "User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36" },
            {"Content-Type", "application/x-www-form-urlencoded" },
            //{"Cookie","wedoc_openid=wozbKqDgAAYt6fSGwDXda25jv2p5OP0w; wedoc_sid=1kBsM4ycejYuLERYAMRFUQAA; wedoc_sids=13102701888889220&1oQwT4xhZXMur2NhAINNSgAA|13102702970838080&1kBsM4ycejYuLERYAMRFUQAA; wedoc_skey=13102701888889220&ac00476fed4403712cae26060dfb39b6||13102702970838080&b89214c23c46059d0221af76cb528adb; wedoc_ticket=13102701888889220&CAESIG807y5KZMJpoC13g7JnkNY7pdaXE4n_sycBDYT9KEnH|13102702970838080&CAESIAhdu0oATYX8_OokDtb82-QP6zCNIe-ecFzDi53s5For;" }
        };

        public string cookies;
        public string docId;
        public string docName;

        private string _operationId;
        private int _progress;
        private string _downloadUrl;
        
        public bool isDownloaded = false;
        public bool isFinished = false;
        public bool isCanceled = false;

        public WPExcelDownloader(string docName, string docId, string cookies)
        {
            this.docName = docName;
            this.docId = docId;
            _progress = 0;
            
            this.cookies = cookies;

            _headers["Cookie"] = this.cookies;
        }

        public void Cancel()
        {
            isCanceled = true;
            isFinished = true;
        }

        public async UniTask<bool> StartDownload()
        {
            Debug.Log("开始下载:" + docName);

            var result = await _RequestOperationId();
            if (!result)
            {
                isFinished = true;
                return false;
            }
            if (isCanceled)
            {
                return false;
            }
            while (_progress < 100)
            {
                var r2 = await _RequestDownloadUrl();
                if (!r2)
                {
                    isFinished = true;
                    return false;
                }
                
                if (isCanceled)
                {
                    return false;
                }
                
                await UniTask.Delay(100);
                
                if (isCanceled)
                {
                    return false;
                }
            }
            var r3 = await _StartDownload();
            
            if (isCanceled)
            {
                return false;
            }
            
            isDownloaded = r3;
            isFinished = true;
            return r3;
        }

        public async UniTask<bool> OnlyCheck()
        {
            var result = await _RequestOperationId();
            return result;
        }

        private async UniTask<bool> _StartDownload()
        {
            var url = _downloadUrl;
            var request = UnityWebRequest.Get(url);
            UnityWebRequest result;
            try
            {
                result = await request.SendWebRequest();
            }
            catch (Exception e)
            {
                Debug.LogException(e);
                return false;
            }
            if (!string.IsNullOrEmpty(result.error))
            {
                Debug.LogError("下载:" + docName + "发生错误:" + result.error);
                return false;
            }
            var bytesData = result.downloadHandler.data;
            // 写到文件
            var savePath = DownloadConfig.SAVE_PATH + docName;
            // 先删旧的
            try
            {
                if (File.Exists(savePath))
                {
                    File.Delete(savePath);
                }
            }
            catch
            {
                Debug.LogError($"文件{docName}占用中");
                return false;
            }

            await File.WriteAllBytesAsync(savePath, bytesData);
            Debug.Log("下载:" + docName + "成功");
            return true;
        }

        private async UniTask<bool> _RequestDownloadUrl()
        {
            var milliseconds = DateTime.Now.Ticks / 10000;
            var url = $"https://doc.weixin.qq.com/v1/export/query_progress?operationId={_operationId}&timestamp={milliseconds}";
            var request = UnityWebRequest.Get(url);
            foreach (var data in _headers)
            {
                request.SetRequestHeader(data.Key, data.Value);
            }
            UnityWebRequest result;
            try
            {
                result = await request.SendWebRequest();
            }
            catch (Exception e)
            {
                Debug.LogException(e);
                return false;
            }
            var jsonStr = result.downloadHandler.text;
            var jsonObj = SimpleJSON.JSON.Parse(jsonStr);
            var ret = (int)jsonObj["ret"];
            if (ret == 0)
            {
                _progress = (int)jsonObj["progress"];
                if (_progress >= 100)
                {
                    _downloadUrl = jsonObj["file_url"];
                }
                return true;
            }
            else
            {
                Debug.LogError("_RequestDownloadUrl 失败:" + ret);
                return false;
            }
        }

        private async UniTask<bool> _RequestOperationId()
        {
            var sid = Random.Range(1000, 10000) + "";
            // 设置忽略ssl
            ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;
            var url = $"https://doc.weixin.qq.com/v1/export/export_office?sid={sid}&wedoc_xsrf=1&docId={docId}&version=2";
            var cacheJsonObj = new SimpleJSON.JSONObject();
            cacheJsonObj["docId"] = docId;
            cacheJsonObj["version"] = 2;
            var formJson = cacheJsonObj.ToString();
            var request = UnityWebRequest.PostWwwForm(url, "");
            foreach (var data in _headers)
            {
                request.SetRequestHeader(data.Key, data.Value);
            }
            UnityWebRequest result;
            try
            {
                result = await request.SendWebRequest();
            }
            catch (Exception e)
            {
                Debug.LogException(e);
                Debug.LogError("下载:" + docName + "发生错误:" + e.Message);
                Debug.LogError("url:" + url);
                return false;
            }
            var jsonStr = result.downloadHandler.text;
            var jsonObj = SimpleJSON.JSON.Parse(jsonStr);
            var ret = (int)jsonObj["ret"];
            if (ret == 0)
            {
                _operationId = jsonObj["operationId"];
                // 成功
                return true;
            }
            else
            {
                // 失败
                Debug.LogError("_RequestOperationId 失败:" + jsonStr);
                return false;
            }
        }

    }
}