using DataModel.Database;

namespace UI_WinForms;

internal static class AppEvents
{
    static AppEvents()
    {
        AppEvents.AddSomethingHandlers();   
    }

    internal static void ResetAllSubscriptions()
    {
        WhenSettingsChanged = null;
        WhenSectionChanged = null;
        WhenTextElementChanged = null;
        WhenTranslationChanged = null;
        
        AppEvents.AddSomethingHandlers();
    }
    
    #region Event: Settings changed
    
    internal static event EventHandler? WhenSettingsChanged;
    
    internal static void SettingsChanged() => WhenSettingsChanged?.Invoke(null, EventArgs.Empty);

    #endregion
    
    #region Event: Section was changed

    // Section changed event which can be subscribed:
    internal static event EventHandler<Section>? WhenSectionChanged;
    
    // Method to raise the section changed event:
    internal static void SectionChanged(Section section) => WhenSectionChanged?.Invoke(null, section);

    #endregion

    #region Event: Text element was changed

    // Text element changed event which can be subscribed:
    internal static event EventHandler<TextElement?>? WhenTextElementChanged;
    
    // Method to raise the text element changed event:
    internal static void TextElementChanged(TextElement? textElement) => WhenTextElementChanged?.Invoke(null, textElement);

    #endregion

    #region Translation was changed

    // Translation changed event which can be subscribed:
    internal static event EventHandler<Translation?>? WhenTranslationChanged;
    
    // Method to raise the translation changed event:
    internal static void TranslationChanged(Translation? translation) => WhenTranslationChanged?.Invoke(null, translation);

    #endregion

    #region Event: Something was changed
    
    internal static event EventHandler? WhenSomethingChanged;
    
    internal static void SomethingChanged() => WhenSomethingChanged?.Invoke(null, EventArgs.Empty);
    
    private static void AddSomethingHandlers()
    {
        // Raise the something event when any of the other change-events are raised:
        WhenSectionChanged += (sender, args) => WhenSomethingChanged?.Invoke(sender, EventArgs.Empty);
        WhenTextElementChanged += (sender, args) => WhenSomethingChanged?.Invoke(sender, EventArgs.Empty);
        WhenTranslationChanged += (sender, args) => WhenSomethingChanged?.Invoke(sender, EventArgs.Empty);
        WhenSettingsChanged += (sender, args) => WhenSomethingChanged?.Invoke(sender, EventArgs.Empty);
    }

    #endregion
}