using System.Windows;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.IO;
using System.Windows.Media.Imaging;
using Microsoft.Win32;
using System.Windows.Forms;

namespace ImageCatalog_2
{
    public partial class MainWindow : Window
    {
        private readonly DataModel _model;
        public MainWindow(DataModel model)
        {
            InitializeComponent();
            _model = model;
            DataContext = _model;
            // Apply theme based on user preference or system setting (default to light)
            ApplyTheme(isDark: false);
            // Subscribe to DataModel events that require UI dialogs
            _model.SelectSourceFolderRequested += Model_SelectSourceFolderRequested;
            _model.SelectDestinationFolderRequested += Model_SelectDestinationFolderRequested;
            _model.SelectLogoFileRequested += Model_SelectLogoFileRequested;
            _model.SaveSettingsRequested += Model_SaveSettingsRequested;
            _model.LoadSettingsRequested += Model_LoadSettingsRequested;
            _model.SelectColorRequested += Model_SelectColorRequested;
            _model.SelectTransparentColorRequested += Model_SelectTransparentColorRequested;
            _model.SelectModelsFolderRequested += Model_SelectModelsFolderRequested;
            _model.SelectCsvOutputRequested += Model_SelectCsvOutputRequested;

            // Watch for logo changes to update preview
            _model.PropertyChanged += Model_PropertyChanged;
        }

        private void ApplyTheme(bool isDark)
        {
            try
            {
                var rd = isDark ? (ResourceDictionary)Resources["DarkTheme"] : (ResourceDictionary)Resources["LightTheme"];
                foreach (var key in rd.Keys)
                {
                    Resources[key] = rd[key];
                }
            }
            catch
            {
                // ignore theme failures
            }
        }

        private void Model_SelectModelsFolderRequested(object? sender, EventArgs e)
        {
            var dlg = new System.Windows.Forms.FolderBrowserDialog();
            var starting = string.IsNullOrWhiteSpace(_model.ModelsFolderPath) ? Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) : _model.ModelsFolderPath;
            dlg.SelectedPath = starting;
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _model.ModelsFolderPath = dlg.SelectedPath + Path.DirectorySeparatorChar;
            }
        }

        private void OpenModelsFolder_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var path = _model.ModelsFolderPath;
                if (string.IsNullOrWhiteSpace(path)) return;
                path = path.Trim().Trim('"');
                if (File.Exists(path))
                {
                    System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
                    return;
                }
                if (Directory.Exists(path))
                {
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = path, UseShellExecute = true });
                    return;
                }
            }
            catch { }
        }

        private void Model_SelectCsvOutputRequested(object? sender, EventArgs e)
        {
            var dlg = new Microsoft.Win32.SaveFileDialog();
            dlg.Filter = "CSV file (*.csv)|*.csv|All files (*.*)|*.*";
            if (!string.IsNullOrWhiteSpace(_model.CsvOutputPath)) dlg.FileName = _model.CsvOutputPath;
            var result = dlg.ShowDialog(this);
            if (result == true)
            {
                _model.CsvOutputPath = dlg.FileName;
            }
        }

        private void OpenCsvOutputFolder_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var path = _model.CsvOutputPath;
                if (string.IsNullOrWhiteSpace(path)) return;
                path = path.Trim().Trim('"');
                if (File.Exists(path))
                {
                    System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
                    return;
                }
                var dir = Path.GetDirectoryName(path);
                if (!string.IsNullOrWhiteSpace(dir) && Directory.Exists(dir))
                {
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = dir, UseShellExecute = true });
                    return;
                }
            }
            catch { }
        }

        private void Model_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e is null || string.IsNullOrWhiteSpace(e.PropertyName)) return;
            if (e.PropertyName == nameof(_model.LogoFile))
            {
                UpdateLogoPreview(_model.LogoFile);
            }
        }

        private void Model_SelectSourceFolderRequested(object? sender, EventArgs e)
        {
            var dlg = new System.Windows.Forms.FolderBrowserDialog();
            var starting = string.IsNullOrWhiteSpace(_model.SourcePath) ? Environment.GetFolderPath(Environment.SpecialFolder.MyPictures) : _model.SourcePath;
            dlg.SelectedPath = starting;
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _model.SourcePath = dlg.SelectedPath + Path.DirectorySeparatorChar;
            }
        }

        private void OpenSourceFolder_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var path = _model.SourcePath;
                if (string.IsNullOrWhiteSpace(path)) return;
                path = path.Trim().Trim('"');
                if (File.Exists(path))
                {
                    System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
                    return;
                }
                if (Directory.Exists(path))
                {
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = path, UseShellExecute = true });
                    return;
                }
            }
            catch (Exception ex)
            {
                // ignore for now, or could show a message
            }
        }

        private void Model_SelectDestinationFolderRequested(object? sender, EventArgs e)
        {
            var dlg = new System.Windows.Forms.FolderBrowserDialog();
            var starting = string.IsNullOrWhiteSpace(_model.DestinationPath) ? Environment.GetFolderPath(Environment.SpecialFolder.MyPictures) : _model.DestinationPath;
            dlg.SelectedPath = starting;
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _model.DestinationPath = dlg.SelectedPath + Path.DirectorySeparatorChar;
            }

        }

        private void OpenDestinationFolder_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var path = _model.DestinationPath;
                if (string.IsNullOrWhiteSpace(path)) return;
                path = path.Trim().Trim('"');
                if (File.Exists(path))
                {
                    System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
                    return;
                }
                if (Directory.Exists(path))
                {
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = path, UseShellExecute = true });
                    return;
                }
            }
            catch (Exception ex)
            {
                // ignore for now
            }
        }

        private void Model_SelectLogoFileRequested(object? sender, EventArgs e)
        {
            var dlg = new Microsoft.Win32.OpenFileDialog();
            dlg.Filter = "Image Files|*.jpg;*.jpeg;*.png;*.bmp;*.gif";
            if (!string.IsNullOrWhiteSpace(_model.LogoFile)) dlg.FileName = _model.LogoFile;
            var result = dlg.ShowDialog(this);
            if (result == true)
            {
                _model.LogoFile = dlg.FileName;
            }
        }

        private async void Model_SaveSettingsRequested(object? sender, string filePath)
        {
            var dlg = new Microsoft.Win32.SaveFileDialog();
            dlg.Filter = "Setup (*.xml)|*.xml|All valid files (*.*)|*.*";
            var result = dlg.ShowDialog(this);
            if (result == true)
            {
                await _model.SaveSettingsToFileAsync(dlg.FileName);
            }
        }

        private async void Model_LoadSettingsRequested(object? sender, string filePath)
        {
            var dlg = new Microsoft.Win32.OpenFileDialog();
            dlg.Filter = "Setup (*.xml)|*.xml|All valid files (*.*)|*.*";
            var result = dlg.ShowDialog(this);
            if (result == true)
            {
                await _model.LoadSettingsFromFileAsync(dlg.FileName);
            }
        }

        private void Model_SelectColorRequested(object? sender, EventArgs e)
        {
            var dlg = new System.Windows.Forms.ColorDialog { AllowFullOpen = true };
            if (!string.IsNullOrWhiteSpace(_model.TextColorRGB))
            {
                try { dlg.Color = System.Drawing.ColorTranslator.FromHtml(_model.TextColorRGB); } catch { }
            }
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _model.TextColorRGB = System.Drawing.ColorTranslator.ToHtml(dlg.Color);
            }
        }

        private void Model_SelectTransparentColorRequested(object? sender, EventArgs e)
        {
            var dlg = new System.Windows.Forms.ColorDialog { AllowFullOpen = true };
            try { dlg.Color = System.Drawing.ColorTranslator.FromHtml(_model.TransparentColor); } catch { }
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                _model.TransparentColor = System.Drawing.ColorTranslator.ToHtml(dlg.Color);
            }
        }

        private void UpdateLogoPreview(string? path)
        {
            if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
            {
                LogoPreview.Source = null;
                return;
            }

            try
            {
                var bitmap = new BitmapImage();
                bitmap.BeginInit();
                bitmap.CacheOption = BitmapCacheOption.OnLoad;
                bitmap.UriSource = new Uri(path);
                bitmap.EndInit();
                LogoPreview.Source = bitmap;
            }
            catch
            {
                LogoPreview.Source = null;
            }
        }
    }
}