using System;
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using System.IO;
using System.Net;
using ZXing;
using ZXing.QrCode;
using System.Threading;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using UnityEngine.Events;

namespace UC
{
    public class FTP : MonoBehaviour
    {
        [SerializeField]
        private string host = "ftp://ultracombos.com/";
        [SerializeField]
        private string httpAddress = "https://www.ultracombos.com/techtest/";
        [SerializeField]
        private string user = "techtest";
        [SerializeField]
        private string pass = "UcRocks1!";

        [Range(1, 6)]
        public int uploadTexDevideRate = 1;

        struct FTPData
        {
            public string filename;
            public byte[] data;
        }

        public struct FTPUploadResult
        {
            public bool success;
            public string publicUrl;
            public FTPUploadResult(string publicUrl, bool success)
            {
                this.success = success;
                this.publicUrl = publicUrl;
            }
        }

        [Serializable]
        public class FTPUploadEvent: UnityEvent<FTPUploadResult> { };
        [SerializeField]
        public FTPUploadEvent uploadEvent = new FTPUploadEvent();

        List<FTPUploadResult> results = new List<FTPUploadResult>();

        private void Update()
        {
            lock(results)
            {
                foreach(var r in results)
                {
                    if(uploadEvent != null)
                    {
                        uploadEvent.Invoke(r);
                    }
                }
                results.Clear();
            }
        }

        public void Upload(Texture tex)
        {
            Texture2D newTex = UC.TextureUtil.Resize(tex, uploadTexDevideRate);
            Debug.Log("upload tex size: " + newTex.width + " " + newTex.height);
            byte[] pngBytes = newTex.EncodeToPNG();

            string datetime = DateTime.Now.ToString("yyyyMMddHHmmssss");
            string hash = Regex.Replace(DateTime.Now.GetHashCode().ToString(), @"-", "");
            string filename = "img_" + datetime + "_" + hash + ".png";

            FTPData data = new FTPData();
            data.filename = filename;
            data.data = pngBytes;

            Thread loadingThread = new Thread(new ParameterizedThreadStart(UploadThread));
            loadingThread.Start(data);
            Destroy(newTex);
        }

        void UploadThread(object obj)
        {
            FTPData data = (FTPData)obj;
            Stream ftpStream = null;
            Debug.Log("Upload begin");
            try
            {
                //private FtpWebResponse ftpResponse = null;
                string uri = host + "/" + data.filename;
                Debug.Log(uri);
                FtpWebRequest ftpRequest = (FtpWebRequest)FtpWebRequest.Create(uri);
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
                ftpStream = ftpRequest.GetRequestStream();
                ftpStream.Write(data.data, 0, data.data.Length);
                
                lock(results)
                {
                    string url = httpAddress + data.filename;
                    Debug.Log("Upload success to url: " + url);

                    FTPUploadResult r = new FTPUploadResult(url, true);
                    results.Add(r);
                }
            }
            catch (System.Exception e)
            {
                Debug.Log("Upload fail!!!");
                print(e);
                if (uploadEvent != null)
                {
                    FTPUploadResult r = new FTPUploadResult("", false);
                    results.Add(r);
                }
            }
            finally
            {
                ftpStream.Close();
            }   
        }

    }
}