using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;

using FlickrNet;

namespace FlickrUploadTest
{
    public partial class FormFlickrUpload : Form
    {
        private Flickr flickr;
        private String flickr_apikey = "cce8e143a8b4fd19c1e4026909643c67";
        private String flickr_secret = "5b58a24a5826ce2a";
        private String flickr_frob;
        private String fileName;
        /// <summary>
        /// Uploadするファイル
        /// </summary>
        public String FileName
        {
            get
            {
                return this.fileName;
            }
            set
            {
                if (!new FileInfo(value).Exists) return;
                panelDD.BackgroundImage = Image.FromFile(value);
                this.fileName = value;
                buttonUpload.Enabled = true;
            }
        }
        private Auth auth;
        private Thread threadUpload;

        public FormFlickrUpload()
        {
            InitializeComponent();
            buttonUpload.Enabled = false;
            progressBar.Visible = false;
            panelDD.AllowDrop = true;

            flickr = new Flickr();
            flickr.ApiKey = flickr_apikey;
            flickr.ApiSecret = flickr_secret;
            flickr_frob = flickr.AuthGetFrob();

            System.Diagnostics.Process.Start(flickr.AuthCalcUrl(flickr_frob, AuthLevel.Write)); // 認証画面をブラウザで開く
            
            flickr.OnUploadProgress += new Flickr.UploadProgressHandler(flickr_OnUploadProgress);
        }

        private void buttonGetToken_Click(object sender, EventArgs e)
        {
            try
            {
                auth = flickr.AuthGetToken(flickr_frob);
                flickr.AuthToken = auth.Token;
                buttonGetToken.Visible = false;
                groupBoxDrop.Text = "Drop Photo here";
                if (auth.User.Username != null) Text = "Flickr Upload Test - " + auth.User.Username;
                else Text = "Flickr Upload Test - " + auth.User.UserId;
            }
            catch (FlickrApiException ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        #region Drag and Drop
        private void panelDD_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.All;
            else
                e.Effect = DragDropEffects.None;
        }

        private void panelDD_DragDrop(object sender, DragEventArgs e)
        {
            string[] items = (string[])e.Data.GetData(DataFormats.FileDrop, false);
            FileName = items[0]; // 1つ目のファイル
        }
        #endregion

        #region Upload
        private void buttonUpload_Click(object sender, EventArgs e)
        {
            if (FileName == "") return;
            buttonUpload.Enabled = false;
            panelDD.AllowDrop = false;
            progressBar.Visible = true;
            progressBar.Maximum = (int)(new FileInfo(this.FileName).Length/1000);
            try
            {
                Photo p = new Photo();
                threadUpload = new Thread(delegate()
                {
                    p.PhotoId = flickr.UploadPicture(fileName, "test photo", "これはてすとです", "test,uploadertest");
                    p.UserId = auth.User.UserId;
                    System.Diagnostics.Process.Start(p.WebUrl);
                    this.Invoke((MethodInvoker)delegate()
                    {
                        buttonUpload.Enabled = true;
                        panelDD.AllowDrop = true;
                        progressBar.Visible = false;
                    });
                });
                threadUpload.Start();
            }
            catch (FlickrApiException ex)
            {
                Console.WriteLine(ex.Message);
                buttonUpload.Enabled = true;
            }
        }

        void flickr_OnUploadProgress(object sender, UploadProgressEventArgs e)
        {
            if (e.UploadComplete) // アップロード完了
            {
                this.Invoke((MethodInvoker)delegate()
                {
                    progressBar.Value = 0;
                });
            }
            else
            {
                this.Invoke((MethodInvoker)delegate()
                {
                    progressBar.Value = e.Bytes / 1000;
                });
            }
        }
        #endregion

        private void FormFlickrUpload_FormClosed(object sender, FormClosedEventArgs e)
        {
            if(threadUpload != null) threadUpload.Abort(); // スレッド強制終了
        }

    }
}