using System;
using System.Drawing;
using System.Threading;
using System.Windows;
using Netch.Models;
using Netch.Utils;

namespace Netch.Forms
{
    public partial class Dummy
    {
    }

    partial class MainForm
    {
        private State _state = State.Waiting;

        /// <summary>
        ///     当前状态
        /// </summary>
        public State State
        {
            get => _state;
            private set
            {
                if (InvokeRequired)
                {
                    // TODO:使所有 State 赋值不在线程中执行然后移除此代码块
                    BeginInvoke(new Action(() => { State = value; }));
                    return;
                }

                void StartDisableItems(bool enabled)
                {
                    ServerComboBox.Enabled =
                        ModeComboBox.Enabled =
                            EditModePictureBox.Enabled =
                                EditServerPictureBox.Enabled =
                                    DeleteModePictureBox.Enabled =
                                        DeleteServerPictureBox.Enabled = enabled;

                    // 启动需要禁用的控件
                    UninstallServiceToolStripMenuItem.Enabled =
                        updateACLWithProxyToolStripMenuItem.Enabled =
                            UpdateServersFromSubscribeLinksToolStripMenuItem.Enabled =
                                reinstallTapDriverToolStripMenuItem.Enabled =
                                    ReloadModesToolStripMenuItem.Enabled = enabled;
                }

                _state = value;

                StatusText(i18N.Translate(StateExtension.GetStatusString(value)));
                switch (value)
                {
                    case State.Waiting:
                        ControlButton.Enabled = true;
                        ControlButton.Text = i18N.Translate("Start");

                        break;
                    case State.Starting:
                        ControlButton.Enabled = false;
                        ControlButton.Text = "...";

                        ProfileGroupBox.Enabled = false;
                        StartDisableItems(false);
                        break;
                    case State.Started:
                        ControlButton.Enabled = true;
                        ControlButton.Text = i18N.Translate("Stop");

                        StatusTextAppend(_mainController.PortInfo);

                        ProfileGroupBox.Enabled = true;

                        UsedBandwidthLabel.Visible /*= UploadSpeedLabel.Visible*/ = DownloadSpeedLabel.Visible = true;
                        break;
                    case State.Stopping:
                        ControlButton.Enabled = false;
                        ControlButton.Text = "...";

                        ProfileGroupBox.Enabled = false;
                        UsedBandwidthLabel.Visible /*= UploadSpeedLabel.Visible*/ = DownloadSpeedLabel.Visible = false;
                        NatTypeStatusText();
                        break;
                    case State.Stopped:
                        ControlButton.Enabled = true;
                        ControlButton.Text = i18N.Translate("Start");

                        LastUploadBandwidth = 0;
                        LastDownloadBandwidth = 0;

                        ProfileGroupBox.Enabled = true;
                        StartDisableItems(true);
                        break;
                    case State.Terminating:
                        Dispose();
                        Environment.Exit(Environment.ExitCode);
                        return;
                }
            }
        }

        public void NatTypeStatusText(string text = "", string country = "")
        {
            if (InvokeRequired)
            {
                BeginInvoke(new Action<string, string>(NatTypeStatusText), text, country);
                return;
            }

            if (State != State.Started)
            {
                NatTypeStatusLabel.Text = "";
                NatTypeStatusLabel.Visible = NatTypeStatusLightLabel.Visible = false;
                return;
            }

            if (!string.IsNullOrEmpty(text))
            {
                if (country != "")
                {
                    NatTypeStatusLabel.Text = String.Format("NAT{0}{1} [{2}]", i18N.Translate(": "), text, country);
                }
                else
                {
                    NatTypeStatusLabel.Text = String.Format("NAT{0}{1}", i18N.Translate(": "), text);
                }
                if (int.TryParse(text, out int natType))
                {
                    if (natType > 0 && natType < 5)
                    {
                        NatTypeStatusLightLabel.Visible = true;
                        UpdateNatTypeLight(natType);
                    }
                }
            }
            else
            {
                NatTypeStatusLabel.Text = $@"NAT{i18N.Translate(": ", "Test failed")}";
            }

            NatTypeStatusLabel.Visible = true;
        }

        /// <summary>
        ///     更新 NAT指示灯颜色
        /// </summary>
        /// <param name="natType"></param>
        private void UpdateNatTypeLight(STUN_Client.NatType natType)
        {
            Color c;
            switch (natType)
            {
                case STUN_Client.NatType.UdpBlocked:
                case STUN_Client.NatType.SymmetricUdpFirewall:
                case STUN_Client.NatType.Symmetric:
                    c = Color.Red;
                    break;
                case STUN_Client.NatType.RestrictedCone:
                case STUN_Client.NatType.PortRestrictedCone:
                    c = Color.Yellow;
                    break;
                case STUN_Client.NatType.OpenInternet:
                case STUN_Client.NatType.FullCone:
                    c = Color.LimeGreen;
                    break;
                default:
                    c = Color.Black;
                    break;
            }

            NatTypeStatusLightLabel.ForeColor = c;
        }

        /// <summary>
        ///     更新 NAT指示灯颜色
        /// </summary>
        /// <param name="natType"></param>
        private void UpdateNatTypeLight(int natType)
        {
            Color c;
            switch (natType)
            {
                case 1:
                    c = Color.LimeGreen;
                    break;
                case 2:
                    c = Color.Yellow;
                    break;
                case 3:
                    c = Color.Red;
                    break;
                case 4:
                    c = Color.Black;
                    break;
                default:
                    c = Color.Black;
                    break;
            }

            NatTypeStatusLightLabel.ForeColor = c;
        }

        /// <summary>
        ///     更新状态栏文本
        /// </summary>
        /// <param name="text"></param>
        public void StatusText(string text)
        {
            if (InvokeRequired)
            {
                BeginInvoke(new Action<string>(StatusText), text);
                return;
            }

            StatusLabel.Text = i18N.Translate("Status", ": ") + text;
        }

        public void StatusTextAppend(string text)
        {
            StatusLabel.Text += text;
        }
    }
}