using Elwig.Windows;
using System;
using System.Drawing.Printing;
using System.Threading.Tasks;
using System.Windows;

namespace Elwig.Helpers.Printing {
    public static class Pdf {

        public static Task Init(Action? evtHandler = null) {
            PdfiumNative.FPDF_InitLibrary();
            evtHandler?.Invoke();
            return Task.CompletedTask;
        }

        public static Task Cleanup() {
            PdfiumNative.FPDF_DestroyLibrary();
            return Task.CompletedTask;
        }

        public static void Show(TempFile file, string title) {
            App.MainDispatcher.BeginInvoke(() => {
                var w = new DocumentViewerWindow(title, file);
                w.Show();
            });
        }

        public static void Show(string path, string title) {
            App.MainDispatcher.BeginInvoke(() => {
                var w = new DocumentViewerWindow(title, path);
                w.Show();
            });
        }

        public static async Task Print(string path, int copies = 1, bool doublePaged = false) {
            await Print(path, new() {
                Copies = (short)copies,
                Collate = true,
                Duplex = doublePaged ? Duplex.Vertical : Duplex.Simplex,
            });
        }

        public static Task Print(string path, PrinterSettings settings) {
            try {
                using var printDoc = new PdfPrintDocument(path) {
                    PrinterSettings = settings,
                };
                printDoc.Print();
            } catch (Exception e) {
                MessageBox.Show("Beim Drucken ist ein Fehler aufgetreten:\n\n" + e.Message, "Fehler beim Drucken", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            return Task.CompletedTask;
        }
    }
}