using System.Drawing;
using System.Windows.Forms;
using ZA.CoreService.ESBCertificateManager.Models;

namespace ZA.CoreService.ESBCertificateManager.Setup;

public sealed class AddCredentialProfileForm : Form
{
    private readonly SetupCoordinator _coordinator;
    private readonly SonicSystemOption _system;

    private readonly TextBox _txtProfileName;
    private readonly TextBox _txtUserName;
    private readonly TextBox _txtPassword;
    private readonly TextBox _txtPasswordRepeat;
    private readonly CheckBox _chkDefault;
    private readonly Button _btnSave;
    private readonly Button _btnCancel;

    private bool _operationRunning;

    public SonicCredentialProfile? CreatedProfile
    {
        get;
        private set;
    }

    public AddCredentialProfileForm(
        SetupCoordinator coordinator,
        SonicSystemOption system)
    {
        _coordinator =
            coordinator
            ?? throw new ArgumentNullException(
                nameof(coordinator));

        _system =
            system
            ?? throw new ArgumentNullException(
                nameof(system));

        Text = "Benutzerprofil hinzufügen";

        StartPosition =
            FormStartPosition.CenterParent;

        ClientSize =
            new Size(560, 525);

        FormBorderStyle =
            FormBorderStyle.FixedDialog;

        MaximizeBox = false;
        MinimizeBox = false;
        ShowInTaskbar = false;

        BackColor =
            Color.FromArgb(10, 18, 34);

        ForeColor =
            Color.FromArgb(241, 245, 249);

        Font =
            new Font("Segoe UI", 10);

        Label title = new()
        {
            Text =
                $"Profil für {_system.ConnectionName}",

            Location =
                new Point(28, 22),

            AutoSize = true,

            ForeColor =
                Color.FromArgb(241, 245, 249),

            Font =
                new Font(
                    "Segoe UI",
                    17,
                    FontStyle.Bold)
        };

        Label details = new()
        {
            Text =
                $"Umgebung: {_system.EnvironmentCode}"
                + Environment.NewLine
                + $"Domain: {_system.DomainName}"
                + Environment.NewLine
                + $"Adresse: {_system.ConnectionUrl}"
                + Environment.NewLine
                + $"Prüfcontainer: "
                + $"{_system.ValidationContainerName}",

            Location =
                new Point(30, 62),

            Size =
                new Size(495, 90),

            ForeColor =
                Color.FromArgb(169, 184, 200)
        };

        Label profileLabel =
            CreateLabel(
                "Profilname",
                160);

        _txtProfileName =
            CreateTextBox(185);

        _txtProfileName.Text =
            "Administrator";

        Label userLabel =
            CreateLabel(
                "Sonic-Benutzername",
                225);

        _txtUserName =
            CreateTextBox(250);

        _txtUserName.Text =
            "Administrator";

        Label passwordLabel =
            CreateLabel(
                "Kennwort",
                290);

        _txtPassword =
            CreateTextBox(315);

        _txtPassword.UseSystemPasswordChar =
            true;

        Label repeatLabel =
            CreateLabel(
                "Kennwort wiederholen",
                355);

        _txtPasswordRepeat =
            CreateTextBox(380);

        _txtPasswordRepeat.UseSystemPasswordChar =
            true;

        _chkDefault = new CheckBox
        {
            Text =
                "Als Standardprofil verwenden",

            Location =
                new Point(30, 425),

            AutoSize = true,
            Checked = true,

            ForeColor =
                Color.FromArgb(241, 245, 249)
        };

        _btnCancel = new Button
        {
            Text = "Abbrechen",

            Location =
                new Point(125, 465),

            Size =
                new Size(110, 38),

            BackColor =
                Color.FromArgb(39, 52, 73),

            ForeColor =
                Color.FromArgb(241, 245, 249),

            FlatStyle =
                FlatStyle.Flat,

            DialogResult =
                DialogResult.Cancel
        };

        _btnCancel.FlatAppearance.BorderSize = 0;

        _btnSave = new Button
        {
            Text =
                "Verbindung prüfen und hinzufügen",

            Location =
                new Point(245, 465),

            Size =
                new Size(280, 38),

            BackColor =
                Color.FromArgb(208, 171, 57),

            ForeColor =
                Color.FromArgb(30, 25, 10),

            FlatStyle =
                FlatStyle.Flat,

            Font =
                new Font(
                    "Segoe UI",
                    9,
                    FontStyle.Bold)
        };

        _btnSave.FlatAppearance.BorderSize = 0;

        _btnSave.Click +=
            async (_, _) =>
                await TestAndSaveAsync();

        Controls.Add(title);
        Controls.Add(details);
        Controls.Add(profileLabel);
        Controls.Add(_txtProfileName);
        Controls.Add(userLabel);
        Controls.Add(_txtUserName);
        Controls.Add(passwordLabel);
        Controls.Add(_txtPassword);
        Controls.Add(repeatLabel);
        Controls.Add(_txtPasswordRepeat);
        Controls.Add(_chkDefault);
        Controls.Add(_btnCancel);
        Controls.Add(_btnSave);

        AcceptButton = _btnSave;
        CancelButton = _btnCancel;
    }

    private Label CreateLabel(
        string text,
        int y)
    {
        return new Label
        {
            Text = text,

            Location =
                new Point(30, y),

            AutoSize = true,

            ForeColor =
                Color.FromArgb(203, 213, 225)
        };
    }

    private TextBox CreateTextBox(int y)
    {
        return new TextBox
        {
            Location =
                new Point(30, y),

            Size =
                new Size(495, 27),

            BorderStyle =
                BorderStyle.FixedSingle,

            BackColor =
                Color.FromArgb(24, 35, 54),

            ForeColor =
                Color.FromArgb(241, 245, 249)
        };
    }

    private async Task TestAndSaveAsync()
    {
        if (_operationRunning)
        {
            return;
        }

        string profileName =
            _txtProfileName.Text.Trim();

        string userName =
            _txtUserName.Text.Trim();

        string password =
            _txtPassword.Text;

        string passwordRepeat =
            _txtPasswordRepeat.Text;

        if (string.IsNullOrWhiteSpace(profileName))
        {
            ShowWarning(
                "Bitte einen Profilnamen eingeben.");

            _txtProfileName.Focus();
            return;
        }

        if (profileName.Length > 150)
        {
            ShowWarning(
                "Der Profilname darf maximal 150 Zeichen enthalten.");

            _txtProfileName.Focus();
            return;
        }

        if (string.IsNullOrWhiteSpace(userName))
        {
            ShowWarning(
                "Bitte einen Sonic-Benutzernamen eingeben.");

            _txtUserName.Focus();
            return;
        }

        if (userName.Length > 256)
        {
            ShowWarning(
                "Der Benutzername darf maximal 256 Zeichen enthalten.");

            _txtUserName.Focus();
            return;
        }

        if (string.IsNullOrEmpty(password))
        {
            ShowWarning(
                "Bitte ein Kennwort eingeben.");

            _txtPassword.Focus();
            return;
        }

        if (password.Length > 512)
        {
            ShowWarning(
                "Das Kennwort darf maximal 512 Zeichen enthalten.");

            _txtPassword.Focus();
            return;
        }

        if (!string.Equals(
                password,
                passwordRepeat,
                StringComparison.Ordinal))
        {
            ShowWarning(
                "Die eingegebenen Kennwörter stimmen nicht überein.");

            _txtPasswordRepeat.Clear();
            _txtPasswordRepeat.Focus();
            return;
        }

        await RunSaveOperationAsync(
            profileName,
            userName,
            password);
    }

    private async Task RunSaveOperationAsync(
     string profileName,
     string userName,
     string password)
    {
        _operationRunning = true;
        SetOperationState(isRunning: true);

        try
        {
            CreatedProfile =
                await _coordinator.AddCredentialAsync(
                    _system,
                    profileName,
                    userName,
                    password,
                    _chkDefault.Checked);

            DialogResult = DialogResult.OK;
            Close();
        }
        catch (OperationCanceledException)
        {
            // Keine Fehlermeldung bei einem regulären Abbruch.
        }
        catch (Exception exception)
        {
            MessageBox.Show(
                this,
                "Das Benutzerprofil konnte nicht angelegt werden."
                + Environment.NewLine
                + Environment.NewLine
                + exception.Message,
                "Benutzerprofil",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error);
        }
        finally
        {
            _operationRunning = false;

            if (!IsDisposed)
            {
                SetOperationState(isRunning: false);
            }
        }
    }

    private void SetOperationState(bool isRunning)
    {
        UseWaitCursor = isRunning;

        _btnSave.Enabled = !isRunning;
        _btnCancel.Enabled = !isRunning;

        _txtProfileName.Enabled = !isRunning;
        _txtUserName.Enabled = !isRunning;
        _txtPassword.Enabled = !isRunning;
        _txtPasswordRepeat.Enabled = !isRunning;
        _chkDefault.Enabled = !isRunning;

        _btnSave.Text =
            isRunning
                ? "Verbindung wird geprüft ..."
                : "Verbindung prüfen und hinzufügen";
    }

    private void ShowWarning(string message)
    {
        MessageBox.Show(
            this,
            message,
            "Eingabe prüfen",
            MessageBoxButtons.OK,
            MessageBoxIcon.Warning);
    }
}