namespace MatrixImageEditor;

internal enum AppDialogIcon
{
    Information,
    Warning,
    Error,
}

internal sealed class AppDialog : Form
{
    private static readonly Size PreferredLogicalSize = new(640, 320);
    private static readonly Size MinimumLogicalSize = new(520, 260);
    private readonly Screen initialScreen;

    private AppDialog(IWin32Window? owner, string message, string title, MessageBoxButtons buttons, AppDialogIcon icon)
    {
        initialScreen = owner is null ? Screen.PrimaryScreen! : Screen.FromHandle(owner.Handle);
        Text = title;
        AutoScaleMode = AutoScaleMode.Dpi;
        Font = new Font("Microsoft YaHei UI", 10F);
        FormBorderStyle = FormBorderStyle.Sizable;
        StartPosition = FormStartPosition.Manual;
        ShowInTaskbar = false;
        MinimizeBox = false;
        MaximizeBox = false;

        var body = new TableLayoutPanel
        {
            Dock = DockStyle.Fill,
            Padding = new Padding(24),
            ColumnCount = 2,
            RowCount = 2,
        };
        body.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
        body.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100));
        body.RowStyles.Add(new RowStyle(SizeType.Percent, 100));
        body.RowStyles.Add(new RowStyle(SizeType.AutoSize));

        var picture = new PictureBox
        {
            Image = GetIcon(icon).ToBitmap(),
            SizeMode = PictureBoxSizeMode.CenterImage,
            Size = new Size(64, 64),
            Margin = new Padding(0, 0, 20, 0),
            Anchor = AnchorStyles.Top,
        };
        var text = new TextBox
        {
            Text = message,
            ReadOnly = true,
            Multiline = true,
            WordWrap = true,
            ScrollBars = ScrollBars.Vertical,
            Dock = DockStyle.Fill,
            BackColor = SystemColors.Window,
            BorderStyle = BorderStyle.FixedSingle,
            Margin = new Padding(0),
            ShortcutsEnabled = true,
        };
        var actions = new FlowLayoutPanel
        {
            Dock = DockStyle.Fill,
            AutoSize = true,
            FlowDirection = FlowDirection.RightToLeft,
            WrapContents = false,
            Margin = new Padding(0, 20, 0, 0),
        };

        if (buttons == MessageBoxButtons.YesNo)
        {
            var no = Button("否", DialogResult.No);
            var yes = Button("是", DialogResult.Yes);
            actions.Controls.Add(no);
            actions.Controls.Add(yes);
            AcceptButton = yes;
            CancelButton = no;
        }
        else
        {
            var ok = Button("确定", DialogResult.OK);
            actions.Controls.Add(ok);
            AcceptButton = ok;
            CancelButton = ok;
        }

        body.Controls.Add(picture, 0, 0);
        body.Controls.Add(text, 1, 0);
        body.Controls.Add(actions, 0, 1);
        body.SetColumnSpan(actions, 2);
        Controls.Add(body);
    }

    public static DialogResult Show(IWin32Window? owner, string message, string title, MessageBoxButtons buttons, AppDialogIcon icon)
    {
        using var dialog = new AppDialog(owner, message, title, buttons, icon);
        return owner is null ? dialog.ShowDialog() : dialog.ShowDialog(owner);
    }

    public static void Information(IWin32Window? owner, string message, string title) => Show(owner, message, title, MessageBoxButtons.OK, AppDialogIcon.Information);
    public static void Error(IWin32Window? owner, string message, string title) => Show(owner, message, title, MessageBoxButtons.OK, AppDialogIcon.Error);
    public static DialogResult Confirm(IWin32Window? owner, string message, string title) => Show(owner, message, title, MessageBoxButtons.YesNo, AppDialogIcon.Warning);

    protected override void OnShown(EventArgs eventArgs)
    {
        base.OnShown(eventArgs);
        ResponsiveLayout.FitAndCenter(this, PreferredLogicalSize, MinimumLogicalSize, 0.8, initialScreen);
    }

    protected override void OnDpiChanged(DpiChangedEventArgs eventArgs)
    {
        base.OnDpiChanged(eventArgs);
        BeginInvoke(() => ResponsiveLayout.FitAndCenter(this, PreferredLogicalSize, MinimumLogicalSize, 0.8));
    }

    private static Button Button(string text, DialogResult result) => new()
    {
        Text = text,
        DialogResult = result,
        AutoSize = true,
        MinimumSize = new Size(110, 38),
        Margin = new Padding(10, 0, 0, 0),
    };

    private static Icon GetIcon(AppDialogIcon icon) => icon switch
    {
        AppDialogIcon.Error => SystemIcons.Error,
        AppDialogIcon.Warning => SystemIcons.Warning,
        _ => SystemIcons.Information,
    };
}