using Common.StartupHelpers;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using MultiTerm.Core.Common;
using MultiTerm.Core.Factories;
using System.Collections.ObjectModel;

namespace MultiTerm.Core.ViewModel;

public partial class ShellViewModel : ObservableObject
{
    [ObservableProperty]
    private string title = "ShellView Test";

    [ObservableProperty]
    private ObservableCollection<ITerminalViewModel> terminalViewModels = new();

    [ObservableProperty]
    private ITerminalViewModel? selectedTerminalViewModel;

    #region Settings Menu Bar
    // TODO Initialize from File
    [ObservableProperty]
    private NewlineSeparatorType defaultReceiveNewlineSeparator = NewlineSeparatorType.None;

    // TODO Initialize from File
    [ObservableProperty]
    private NewlineSeparatorType defaultSendNewlineSeparator = NewlineSeparatorType.None;
    #endregion

    #region New Terminal Context Menu
    [ObservableProperty]
    private TerminalViewType selectedTerminalViewType = TerminalViewType.SendReceive;

    #endregion

    private readonly ITerminalViewModelFactory terminalViewModelFactory;

    public ShellViewModel(ITerminalViewModelFactory terminalViewModelFactory)
    {
        this.terminalViewModelFactory = terminalViewModelFactory;
    }

    [RelayCommand]
    private void AppendTerminalWithSelectedViewType(ProtocolType protocolType)
    {
        this.AppendConfiguredTerminal(this.terminalViewModelFactory.Create(this.SelectedTerminalViewType, protocolType));
    }


    private void AppendConfiguredTerminal(ITerminalViewModel? newTerminal)
    {
        // guard null value
        if(newTerminal == null) { return; }

        // add to collection and register closing event handler
        this.TerminalViewModels.Add(newTerminal);
        newTerminal.ClosingEvent += Terminal_ClosingEvent;

        // set as selected
        this.SelectedTerminalViewModel = newTerminal;
    }

    private void Terminal_ClosingEvent(object? sender, EventArgs e)
    {
        if(sender is not ITerminalViewModel tvm) { throw new ArgumentException($"{nameof(Terminal_ClosingEvent)} failed to convert sender to {nameof(ITerminalViewModel)}"); }
        this.RemoveTerminal(tvm);
    }

    private void RemoveTerminal(ITerminalViewModel terminalToRemove)
    {
        // guard null value
        if(terminalToRemove == null) { return; }

        this.TerminalViewModels.Remove(terminalToRemove);
    }

    partial void OnDefaultReceiveNewlineSeparatorChanged(NewlineSeparatorType value)
    {
        Console.WriteLine($"Changed to {value}");
    }

    partial void OnDefaultSendNewlineSeparatorChanged(NewlineSeparatorType value)
    {
        Console.WriteLine($"Changed Send to {value}");
    }

    [RelayCommand]
    private void TestButtonClicked()
    {
        this.DefaultReceiveNewlineSeparator = NewlineSeparatorType.CR_LF;
    }

}