using Newtonsoft.Json;
using System.Collections;
using Octopus.Simulator.Networks;
using System.Collections.Generic;
using System.IO;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;
using System;
using System.Text;
using Octopus.Simulator;
using Octopus.Simulator.UI.Popup;

#pragma warning disable CS8632

namespace UVC.Networks
{
    //API를 통해 서버와 통신하기 위한 함수들이 내장되어 있습니다.
    //Post, Get. Put을 사용하며, Post의 경우엔 Class를 입력으로 받아 Json형식으로 변환하여 업로드합니다.
    //비동기로 실행하기 위해 Coroutine으로 제작되었으며, callback의 bool값을 통해 서버로부터
    //정상적으로 API가 입력, 결과가 출력되었는지를 확인할 수 있습니다.

    public enum RequestType
    {
        //"GET", "POST", "PUT", "PATCH", "DELETE"
        GET,
        POST,
        PUT,
        PATCH,
        DELETE,

    }

    public class WebManager : MonoBehaviour
    {
        static WebManager webManager;
        public static WebManager Instance
        {
            get
            {
                if (webManager == null)
                {
                    GameObject go = new GameObject("[WebManager]");
                    webManager = go.AddComponent<WebManager>();
                    DontDestroyOnLoad(go);
                }
                return webManager;
            }
        }
        [SerializeField] private string _webConfigResourcePath= "WebConfig";
        [SerializeField] private string _apiConfigResourcePath= "APIEndPointsConfig";
        private WebConfigLoader _webConfigLoader = new WebConfigLoader();
        private ApiConfigLoader _apiConfigLoader = new ApiConfigLoader();
        public APIEndPointsConfig apiConfig;
        public string ProjectTitle = "";

        void Awake()
        {
            if (webManager != null && webManager != this)
            {
                Destroy(gameObject);
                return;
            }
            webManager = this;
            //DontDestroyOnLoad(gameObject);

#if UNITY_EDITOR
            _webConfigLoader.LoadFromResources(_webConfigResourcePath);
#else
                Debug.Log("onwebgl");
                WebReceiver receiver = FindAnyObjectByType<WebReceiver>();
                receiver.onWebConfigReceived += HandleWebConfigFromReceiver;
#endif
            apiConfig = _apiConfigLoader.LoadFromResources(_apiConfigResourcePath);
        }

        private void HandleWebConfigFromReceiver(string json)
        {
            _webConfigLoader.LoadFromJsonString(json);
            Debug.Log("handle");
        }

        //별도의 Data Content 가 없을 경우 reqeustURL 과 callback 등 만을 parameter로 넘기면 됨 
        public void Reqeust<T>(string requestURL, RequestType type , Action<T> callback, object json = null)
        {
            string data = "";

            if ( json != null)
            {
                try
                {
                    data = JsonConvert.SerializeObject(json);
                }
                catch (Exception e)
                {
                    AlertManager.I.ShowConfirm("Error",e.Message).Forget();
                }
            }

            RequestAsync<T>(requestURL, type, data)
                .ContinueWith(result => callback?.Invoke(result))
                .Forget();

        }

        private async UniTask<T> RequestAsync<T>(string requestURL, RequestType type, string json)
        {
            string fullUrl = _webConfigLoader.BaseUrl + requestURL;
            Debug.Log(fullUrl);

            using (UnityWebRequest request = new UnityWebRequest(fullUrl, type.ToString()))
            {
                byte[] body = Encoding.UTF8.GetBytes(json);
                request.uploadHandler = new UploadHandlerRaw(body);
                request.downloadHandler = new DownloadHandlerBuffer();

                request.SetRequestHeader("Content-Type", "application/json");
                request.SetRequestHeader("Authorization", "Bearer " + _webConfigLoader.Token);

                await request.SendWebRequest();

                if (IsSuccess(request.result))
                {
                    Debug.Log(requestURL);

                    string responseJson = request.downloadHandler.text;
                    Debug.Log($"data:{responseJson}");
                    Base<T> result = JsonConvert.DeserializeObject<Base<T>>(responseJson);
                    return result.data;
                }
                else
                {
                    Debug.LogError($"Request failed, API Name {fullUrl}, Result : {request.error}");
                    throw new Exception($"HTTP Request Failed: {request.error}");
                }
            }
        }

        private bool IsSuccess(UnityWebRequest.Result result)
        {
            switch(result)
            {
                case UnityWebRequest.Result.Success:

                    return true;

                case UnityWebRequest.Result.ConnectionError:
                    return false;

                case UnityWebRequest.Result.ProtocolError:
                    return false;

                default:
                    return false;

            }

        }

    }
}