using Gtk;
using Adw;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace Photomator.Views;

public partial class StatusDialog : Adw.Window {
    private readonly Adw.Application _application;
    private readonly Adw.ApplicationWindow _mainWindow;
    private readonly ProgressBar _progress;

    public StatusDialog(Adw.Application application, Adw.ApplicationWindow parent) : base() {
        _application = application;
        _mainWindow = parent;
        _progress = InitProgressBar();

        SetModal(true);
        SetTransientFor(parent);
        SetDeletable(true);
        SetDefaultSize(400, 500);

        StatusPage pageStatus = InitPageProgress();
        SetContent(pageStatus);
    }

    public void Start() {
        _application.AddWindow(this);
        Present();
    }

    private StatusPage InitPageProgress() {
        StatusPage pageStatus = StatusPage.New();
        pageStatus.SetTitle("Konvertierung wird ausgeführt...");
        pageStatus.SetDescription("Das kann eine Weile dauern.");
        pageStatus.SetChild(_progress);

        return pageStatus;
    }

    private static ProgressBar InitProgressBar() {
        ProgressBar progressBar = ProgressBar.New();
        progressBar.WidthRequest = 300;
        progressBar.SetHalign(Align.Center);
        progressBar.SetMarginTop(10);
        progressBar.SetMarginBottom(12);
        progressBar.SetShowText(true);
        progressBar.AddCssClass("installer");
        progressBar.SetFraction(0);
        progressBar.SetText("");

        return progressBar;
    }

    public void SetProgress(double progress) {
        _progress.SetFraction(progress);
        _progress.SetText(string.Format("{0:p0}", progress));
    }

    private StatusPage InitPageSuccess(int number, string dest) {
        StatusPage pageStatus = StatusPage.New();
        pageStatus.SetTitle("Die Konvertierung wurde erfolgreich abgeschlossen");
        pageStatus.SetDescription($"{number} Dateien wurden erfolgreich konvertiert.");
        pageStatus.SetIconName("selection-mode-symbolic");

        Button btnOpen = Button.NewWithLabel("Ordner öffnen");
        btnOpen.OnClicked += async (_, _) => {
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) {
                FileLauncher fileLauncher = FileLauncher.New(Gio.FileHelper.NewForPath(dest));
                await fileLauncher.LaunchAsync(_mainWindow);
            } else {
                Process.Start("explorer.exe", @$"{dest}");
            }
            
            Close();
        };
        btnOpen.SetCssClasses(["pill", "suggested-action"]);
        btnOpen.SetHalign(Align.Center);

        pageStatus.SetChild(btnOpen);

        return pageStatus;
    }

    public void Success(int number, string dest) {
        StatusPage pageSuccess = InitPageSuccess(number, dest);
        SetContent(pageSuccess);
    }

    private StatusPage InitPagePartial(int number, string dest, ConvertError[] convertErrors) {
        StatusPage pageStatus = StatusPage.New();
        pageStatus.SetTitle("Bei der Konvertierung sind Fehler aufgetreten");
        pageStatus.SetDescription($"{number - convertErrors.Length} von {number} Dateien wurden erfolgreich konvertiert.");
        pageStatus.SetIconName("dialog-warning-symbolic");

        Box box = Box.New(Orientation.Vertical, 36);
        box.SetHalign(Align.Center);

        if (convertErrors.Length < number) {
            Button btnOpen = Button.NewWithLabel("Ordner öffnen");
            btnOpen.OnClicked += async (_, _) => {
                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) {
                    FileLauncher fileLauncher = FileLauncher.New(Gio.FileHelper.NewForPath(dest));
                    await fileLauncher.LaunchAsync(_mainWindow);
                } else {
                    Process.Start("explorer.exe", @$"{dest}");
                }

                Close();
            };
            btnOpen.SetCssClasses(["pill", "suggested-action"]);
            btnOpen.SetHalign(Align.Center);

            box.Append(btnOpen);
        }

        ScrolledWindow scrolled = ScrolledWindow.New();
        scrolled.SetMinContentWidth(328);
        scrolled.SetMinContentHeight(200);
        scrolled.SetOverflow(Overflow.Hidden);

        StringBuilder sb = new StringBuilder();
        foreach (ConvertError err in convertErrors) {
            sb.AppendLine($"{err.File}: {err.Message}");
        }
        Label label = Label.New(sb.ToString());
        label.SetHexpand(true);
        label.SetValign(Align.Fill);
        label.SetWrap(false);
        label.SetSelectable(true);
        label.SetXalign(0);
        label.SetYalign(0);
        label.SetMarginStart(10);
        label.SetMarginEnd(10);
        label.SetMarginTop(5);
        label.SetMarginBottom(5);
        label.SetCssClasses(["monospace", "terminal"]);

        scrolled.SetChild(label);
        scrolled.AddCssClass("card");

        box.Append(scrolled);

        pageStatus.SetChild(box);

        return pageStatus;
    }

    public void Partial(int number, string dest, ConvertError[] convertErrors) {
        StatusPage pagePartial = InitPagePartial(number, dest, convertErrors);
        SetContent(pagePartial);
    }

    private StatusPage InitPageError(string error) {
        StatusPage pageStatus = StatusPage.New();
        pageStatus.SetTitle("Konvertierung fehlgeschlagen");
        pageStatus.SetDescription("Es ist ein Fehler aufgetreten.");
        pageStatus.SetIconName("dialog-error-symbolic");

        Box box = Box.New(Orientation.Vertical, 50);
        box.SetHalign(Align.Center);

        ScrolledWindow scrolled = ScrolledWindow.New();
        scrolled.SetMinContentWidth(328);
        scrolled.SetMinContentHeight(200);
        scrolled.SetOverflow(Overflow.Hidden);

        Label label = Label.New(error);
        label.SetHexpand(true);
        label.SetValign(Align.Fill);
        label.SetWrap(true);
        label.SetSelectable(true);
        label.SetXalign(0);
        label.SetYalign(0);
        label.SetMarginStart(10);
        label.SetMarginEnd(10);
        label.SetMarginTop(5);
        label.SetMarginBottom(5);
        label.SetCssClasses(["monospace", "terminal"]);

        scrolled.SetChild(label);
        scrolled.AddCssClass("card");

        Button button = Button.NewWithLabel("Schließen");
        button.OnClicked += (_, _) => Close();
        button.SetCssClasses(["pill"]);
        button.SetHalign(Align.Center);

        box.Append(scrolled);
        box.Append(button);

        pageStatus.SetChild(box);

        return pageStatus;
    }

    public void Error(string error) {
        StatusPage pageError = InitPageError(error);
        SetContent(pageError);
    }
}