using CircleSDK.Model;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using CDPShared;
using static System.Net.Mime.MediaTypeNames;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;

namespace CircleViewer
{
    public partial class SecureFileDlg : Form
    {
        private CDPWorker _cdp;

        public SecureFileDlg(CDPWorker cdp)
        {
            _cdp = cdp;
            InitializeComponent();
        }

        async private void SecureFileDlg_Load(object sender, EventArgs e)
        {
            cbCircles.DataSource = _cdp.Circles;
            cbCircles.DisplayMember = "CircleName";
            SetStatus("Idle");
        }

        async private void cbCircles_SelectedValueChanged(object sender, EventArgs e)
        {
            CircleInfo ci = (CircleInfo) cbCircles.SelectedItem;
            if (ci != null)
            {
                cbTopics.Enabled = false;
                
                lblDescription.Text = ci.CircleDescription;
                List<TopicInfo> topics = await _cdp.EnumTopics(ci.CircleId);
                cbTopics.DataSource = topics;
                cbTopics.DisplayMember = "TopicName";
                
                cbTopics.Enabled = true;
            }
            else
                lblDescription.Text = "";

        }

        private void cbTopics_SelectedValueChanged(object sender, EventArgs e)
        {
            TopicInfo ti = (TopicInfo)cbTopics.SelectedItem;
            if (ti != null)
                lblTopicDescription.Text = ti.TopicDescription;
            else
                lblTopicDescription.Text = "";
        }

        private void pnDropArea_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.Copy;
            else
                e.Effect = DragDropEffects.None;
        }

        void SetStatus(string txt)
        {
            if (lblStatus.InvokeRequired)
                lblStatus.Invoke((MethodInvoker)delegate { lblStatus.Text = txt; });
            else
                lblStatus.Text = txt;
        }

        private async void pnDropArea_DragDrop(object sender, DragEventArgs e)
        {
            CircleInfo ci = (CircleInfo)cbCircles.SelectedItem;
            TopicInfo ti = (TopicInfo)cbTopics.SelectedItem;

            string[] s = (string[])e.Data.GetData(DataFormats.FileDrop, false);
            for (int i = 0; i < s.Length; i++)
            {
                if (File.Exists(s[i]))
                    await ProcessFile(s[i]);

                if (Directory.Exists(s[i]))
                    await ProcessFolder(s[i]);
            }
        }

        private async Task ProcessFile(string fileName)
        {
            string ext = Path.GetExtension(fileName);

            if (!Constants.SupportedFiles.Contains(ext.ToLower()))
            {
                SetStatus("File type not supported");
                return;
            }

            CircleInfo ci = (CircleInfo)cbCircles.SelectedItem;
            TopicInfo ti = (TopicInfo)cbTopics.SelectedItem;

            SetStatus("Securing " + Path.GetFileName(fileName));

            byte[] encryptedBuf = await _cdp.EncryptFile(ci.CircleId, ti.TopicId, fileName);
            
            string outPath = fileName + ".cir";
            SetStatus("Saving " + Path.GetFileName(fileName));
            File.WriteAllBytes(outPath, encryptedBuf);
            lblStatus.Invoke((MethodInvoker)delegate { lblStatus.Text = "Idle " + Path.GetFileName(fileName); });
            SetStatus("Idle");
        }

        private async Task ProcessFolder(string folder)
        {
            string[] lFiles = Directory.GetFiles(folder);
            foreach (string fileName in lFiles)
            {
                await ProcessFile(fileName);
            }
        }

        private async void bnBrowse_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "Supported Files(*.jpg; *.jpeg; *.gif; *.bmp; *.png; *.pdf; *.mp4)|*.jpg; *.jpeg; *.gif; *.bmp; *.png; *.pdf; *.mp4";
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                await ProcessFile(ofd.FileName);
            }

        }
    }
}