using FastReport.Forms;
using FastReport.Utils;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using FastReport.Cloud.FastReport;


namespace FastReport.Auth
{
    public partial class AuthForm : BaseDialogForm
    {
        #region Private Fields

        private string expiresFormat;
        private static int selectedIndex = 0;
        private static string customAPIkey = "";
        private static string customServerName = "";

        private CancellationTokenSource tokenSource;

        #endregion Private Fields

        public static bool isFirstLoad = true;

        public AuthForm()
        {
            InitializeComponent();
            Localize();
            AuthService.Instance.Refresh();
            UpdateInfo();
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();

            tokenSource = new CancellationTokenSource();
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            lbCaption.Font = lbCaptionServer.Font = this.LogicalToDevice(new Font("Calibri Light", 19.5f), true);
            if (RightToLeft == RightToLeft.Yes)
            {
                lbCaption.Left = pbAvatar.Right - lbCaption.Width;
                lbCaptionServer.Left = pbAvatar.Right - lbCaptionServer.Width;
            }
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,AccountWindow");

            Text = res.Get("");
            lbCaption.Text = res.Get("Title");
            btnSignIn.Text = res.Get("SignIn");
            lbNoAccount.Text = res.Get("NoAccount");
            lbCreateOne.Text = res.Get("Create");
            lbMessage.Text = res.Get("Intro") + res.Get("Testing");
            expiresFormat = res.Get("Expires");
            lbManage.Text = res.Get("Profile");
            lbSignOut.Text = res.Get("SignOut");
            lbText.Text = res.Get("Message");
            lbUpdate.Text = res.Get("SessionExpired");

            MyRes res2 = new MyRes("Forms,ServerWindow");
            pgServer.Text = res2.Get("");
            label1Server.Text = res2.Get("Server");
            label2Server.Text = res2.Get("ApiKeyword");
            lbCaptionServer.Text = res2.Get("Caption");
            comboBoxServerServer.Items[0] = res2.Get("comboBoxServer");
            comboBoxServerServer.Items[1] = res2.Get("comboBoxCustom");
        }

        protected override void OnFormClosed(FormClosedEventArgs e)
        {
            base.OnFormClosed(e);
            if (DialogResult == DialogResult.OK)
            {
                if (!string.IsNullOrEmpty(AuthService.Instance.User.ApiKey) && !string.IsNullOrEmpty(FRCloudOptions.Instance.BackendHost))
                    FRCloudOptions.Instance.SaveCustomServerInfo();
                else
                    FRCloudOptions.Instance.DeleteCustomServerInfo();
            }

            tokenSource.Cancel();
            tokenSource.Dispose();
        }

        private async void btnSignIn_Click(object sender, EventArgs e)
        {
            await Task.Run(async () =>
            {
                await AuthService.Instance.SignIn(tokenSource.Token);
            }, tokenSource.Token);
            UpdateInfo();
        }

        private void lbCreateOne_Click(object sender, EventArgs e)
        {
            ProcessHelper.StartProcess("https://id.fast-report.com/");
        }

        private void lbManage_Click(object sender, EventArgs e)
        {
            ProcessHelper.StartProcess("https://id.fast-report.com/");
        }

        private async void lbSignOut_Click(object sender, EventArgs e)
        {
            await Task.Run(async () =>
            {
                await AuthService.Instance.SignOut(tokenSource.Token);
            }, tokenSource.Token);
            UpdateInfo();
        }

        private async void lbUpdate_Click(object sender, EventArgs e)
        {
            await Task.Run(async () =>
            {
                if (!AuthService.Instance.Refresh())
                    await AuthService.Instance.SignIn(tokenSource.Token);
            }, tokenSource.Token);
            UpdateInfo();
        }

        //server
        private void comboBoxServerServer_SelectedValueChanged(object sender, EventArgs e)
        {
            var comboBox = sender as ComboBox;
            var value = comboBox.SelectedItem as string;
            if (value == Res.Get("Forms,ServerWindow,comboBoxServer")) // pre-written server
            {
                textBoxCustomHostServer.Text = Res.Get("Forms,ServerWindow,DefaultServerHost");
                textBoxCustomHostServer.Enabled = false;
                customServerName = "";
            }
            else    // Custom
            {
                textBoxCustomHostServer.Enabled = true;
                textBoxCustomHostServer.Text = "";
            }

            if (isFirstLoad)
            {
                textBoxApiKeyServer.Text = customAPIkey;
            }
            else
            {
                textBoxApiKeyServer.Text = String.Empty;
            }
        }

        private void textBoxCustomHostServer_TextChanged(object sender, EventArgs e)
        {
            var textBox = sender as TextBox;
            if (!textBox.Enabled)
                return;

            var requestHost = textBox.Text;
            if (string.IsNullOrEmpty(requestHost))
            {
            }
            else
            {
                AuthService.Instance.User.ApiKey = AuthService.Instance.User.ApiKey == String.Empty
                    ? String.Empty
                    : AuthService.Instance.User.ApiKey;

                FRCloudOptions.Instance.BackendHost = requestHost;
                customServerName = requestHost;
            }
        }

        private void textBoxApiKeyServer_TextChanged(object sender, EventArgs e)
        {
            var textBox = sender as TextBox;
            var text = textBox.Text;
            if (text != null)
            {
                var apiKey = text.Trim();

                AuthService.Instance.User.ApiKey = apiKey;
                customAPIkey = apiKey;
            }
        }

        private Image RoundCorners(Image fromImage, float cornerRadius, Color backgroundColor)
        {
            cornerRadius *= 2;
            Bitmap result = new Bitmap(fromImage.Width, fromImage.Height);
            using (Graphics g = Graphics.FromImage(result))
            {
                g.Clear(backgroundColor);
                g.SmoothingMode = SmoothingMode.AntiAlias;
                using (Brush brush = new TextureBrush(fromImage))
                {
                    using (GraphicsPath gp = new GraphicsPath())
                    {
                        gp.AddArc(0, 0, cornerRadius, cornerRadius, 180, 90);
                        gp.AddArc(0 + result.Width - cornerRadius - 1, 0, cornerRadius, cornerRadius, 270, 90);
                        gp.AddArc(0 + result.Width - cornerRadius - 1, 0 + result.Height - cornerRadius - 1, cornerRadius, cornerRadius, 0, 90);
                        gp.AddArc(0, 0 + result.Height - cornerRadius, cornerRadius - 1, cornerRadius, 90, 90);
                        g.FillPath(brush, gp);
                        return result;
                    }
                }
            }
        }

        private void UpdateInfo()
        {
            AuthService auth = AuthService.Instance;
            if (isFirstLoad)
            {
                XmlItem xi = Config.Root.FindItem("Auth").FindItem("ConnectionInfo");

                string serverFromConfig = xi.GetProp("Server");
                string apiKeyFromConfig = FRCloudOptions.Instance.GetDecodedString(xi.GetProp("ApiKey"));

                if (serverFromConfig != string.Empty && serverFromConfig != Res.Get("Forms,ServerWindow,DefaultServerHost") && apiKeyFromConfig != string.Empty)
                {
                    comboBoxServerServer.SelectedIndex = 1;
                    FRCloudOptions.Instance.BackendHost = serverFromConfig;
                    AuthService.Instance.User.ApiKey = apiKeyFromConfig;
                    customAPIkey = apiKeyFromConfig;
                    customServerName = serverFromConfig;
                    textBoxApiKeyServer.Text = apiKeyFromConfig;
                    textBoxCustomHostServer.Text = serverFromConfig;
                }
                else
                {
                    customAPIkey = apiKeyFromConfig;
                    comboBoxServerServer.SelectedIndex = 0;
                    textBoxApiKeyServer.Text = apiKeyFromConfig;
                }
                isFirstLoad = false;
            }
            else
            {
                comboBoxServerServer.SelectedIndex = selectedIndex;
                if (selectedIndex == 1)
                {
                    textBoxCustomHostServer.Text = customServerName;
                }
                textBoxApiKeyServer.Text = customAPIkey;
            }

            if (auth.User.IsAuthenticated)
            {
                BeforeSignIn(false);
                AfterSignIn(true);
                lbUsername.Text = auth.User.DisplayName;
                lbEmail.Text = auth.User.DisplayEmail;
                pbAvatar.Image = RoundCorners(auth.User.DisplayAvatar, 15, Color.Transparent);

                if (auth.CanRefresh)
                {
                    if (auth.User.ExpiresIn < DateTime.Now)
                    {
                        lbTime.Visible = false;
                        lbUpdate.Visible = true;
                    }
                    else
                    {
                        lbUpdate.Visible = false;
                        lbTime.Visible = true;
                        lbTime.Text = String.Format(expiresFormat, auth.User.ExpiresIn.ToShortTimeString());
                    }
                }
                else
                {
                    // do not overlap with lbUpdate which is visible too
                    lbTime.Visible = false;
                }
            }
            else
            {
                BeforeSignIn(true);
                AfterSignIn(false);
            }
        }

        private void BeforeSignIn(bool visible)
        {
            pgFrId.SuspendLayout();

            lbMessage.Visible = visible;
            btnSignIn.Visible = visible;
            lbCreateOne.Visible = visible;
            lbNoAccount.Visible = visible;

            pgFrId.PerformLayout();
        }

        private void AfterSignIn(bool visible)
        {
            pgFrId.SuspendLayout();

            lbUpdate.Visible = visible;
            lbTime.Visible = visible;
            pbAvatar.Visible = visible;
            lbText.Visible = visible;
            lbSignOut.Visible = visible;
            lbManage.Visible = visible;
            lbUsername.Visible = visible;
            lbEmail.Visible = visible;

            pgFrId.ResumeLayout(true);
        }

        private void comboBoxServerServer_SelectedIndexChanged(object sender, EventArgs e)
        {
            selectedIndex = comboBoxServerServer.SelectedIndex;
        }
    }
}