@using BlazorMonaco.Editor
@using Microsoft.JSInterop
@namespace LANCommander.UI.Components
@inject IJSRuntime JSRuntime

<StandaloneCodeEditor
    @ref="_editor"
    OnDidChangeModelContent="OnChangedContent"
    OnDidInit="OnInit"
    ConstructionOptions="_editorConstructionOptions" />

@code {
    [Parameter] public EventCallback<string> OnSave { get; set; }
    [Parameter] public Language Language { get; set; }
    [Parameter] public int Height { get; set; } = 450;
    [Parameter] public string? Value { get; set; }
    [Parameter] public EventCallback<string?> ValueChanged { get; set; }

    static bool _completionsRegistered;
    bool _isEditorInitialized = false;
    string? _previousValue;

    StandaloneCodeEditor _editor;

    StandaloneEditorConstructionOptions _editorConstructionOptions(StandaloneCodeEditor editor) => new()
    {
        AutomaticLayout = true,
        Language = Language.Id,
        Theme = "vs-dark",
        Value = Value,
    };

    protected override async Task OnParametersSetAsync()
    {
        if (_isEditorInitialized && ValueChanged.HasDelegate && Value != _previousValue)
        {
            _previousValue = Value;
            await _editor.SetValue(Value);
        }

        await base.OnParametersSetAsync();
    }

    async Task OnInit()
    {
        _isEditorInitialized = true;

        await _editor.AddCommand((int)BlazorMonaco.KeyMod.CtrlCmd | (int)BlazorMonaco.KeyCode.KeyS, async (editor) =>
        {
            if (OnSave.HasDelegate)
                await OnSave.InvokeAsync();
        }, null);

        if (!_completionsRegistered)
        {
            _completionsRegistered = true;

            var module = await JSRuntime.InvokeAsync<IJSObjectReference>(
                "import", "./_content/LANCommander.UI/bundle.js");
            await module.InvokeVoidAsync("registerPowerShellCompletions");
        }
    }

    public async Task InsertText(string text)
    {
        var position = await _editor.GetPosition();
        var range = new BlazorMonaco.Range(position.LineNumber, 1, position.LineNumber, 1);
        var selections = await _editor.GetSelections();

        await _editor.ExecuteEdits("CodeInput", new List<IdentifiedSingleEditOperation>
        {
            new IdentifiedSingleEditOperation
            {
                Range = range,
                Text = text,
                ForceMoveMarkers = true
            }
        }, selections);
    }

    async Task OnChangedContent(ModelContentChangedEvent e)
    {
        if (ValueChanged.HasDelegate)
        {
            _previousValue = await _editor.GetValue();

            await ValueChanged.InvokeAsync(_previousValue);
        }
    }
}