@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 EventCallback OnReady { 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; }
    [Parameter] public string? ScriptType { get; set; }

    static bool _completionsRegistered;
    bool _isEditorInitialized = false;
    string? _previousValue;
    string? _previousScriptType;
    IJSObjectReference? _module;

    StandaloneCodeEditor _editor;

    StandaloneEditorConstructionOptions _editorConstructionOptions(StandaloneCodeEditor editor) => new()
    {
        AutomaticLayout = true,
        Language = Language.Id,
        Theme = "vs-dark",
        Value = Value,
        Minimap = new EditorMinimapOptions { Enabled = false },
        BracketPairColorization = new BracketPairColorizationOptions { Enabled = true },
        WordWrap = "on",
    };

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

        if (_isEditorInitialized && _module != null && ScriptType != _previousScriptType)
        {
            _previousScriptType = ScriptType;
            await _module.InvokeVoidAsync("setScriptType", ScriptType);
            await RunValidationAsync();
        }

        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);

        _module = await JSRuntime.InvokeAsync<IJSObjectReference>(
            "import", "./_content/LANCommander.UI/bundle.js");

        if (!_completionsRegistered)
        {
            _completionsRegistered = true;
            await _module.InvokeVoidAsync("registerPowerShellCompletions");
        }

        if (ScriptType != null)
        {
            _previousScriptType = ScriptType;
            await _module.InvokeVoidAsync("setScriptType", ScriptType);
        }

        if (OnReady.HasDelegate)
            await OnReady.InvokeAsync();
    }

    public async Task InsertText(string text)
    {
        var selection = await _editor.GetSelection();
        var range = new BlazorMonaco.Range(
            selection.StartLineNumber, selection.StartColumn,
            selection.EndLineNumber, selection.EndColumn);

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

    public async Task InsertSnippet(string snippetText)
    {
        if (_module == null)
        {
            await InsertText(snippetText);
            return;
        }

        await _module.InvokeVoidAsync("insertSnippet", snippetText);
    }

    public async Task<bool> InsertTemplateAsync(string scriptType)
    {
        if (_module == null)
            return false;

        var template = await _module.InvokeAsync<string?>("getScriptTemplate", scriptType);

        if (template == null)
            return false;

        await _editor.SetValue(template);
        return true;
    }

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

            await ValueChanged.InvokeAsync(_previousValue);
        }

        await RunValidationAsync();
    }

    async Task RunValidationAsync()
    {
        if (_module == null || Language.Id != "powershell")
            return;

        await _module.InvokeVoidAsync("validateScript");
    }
}