@using System.Text.RegularExpressions
@using Microsoft.AspNetCore.Components.Rendering
@using Microsoft.Extensions.DependencyInjection
@namespace Oqtane.Modules.Controls
@inherits ModuleControlBase
@inject IServiceProvider ServiceProvider
@inject ISettingService SettingService
@inject IStringLocalizer<RichTextEditor> Localizer 

<div class="row" style="margin-bottom: 50px;">
    <div class="col">
        @_textEditorComponent
    </div>
</div>

@code {
    private ITextEditorProvider _textEditorProvider;
    private RenderFragment _textEditorComponent;
    private ITextEditor _textEditor;

    [Parameter]
    public string Content { get; set; }

    [Parameter]
    public bool ReadOnly { get; set; } = false;

    [Parameter]
    public string Placeholder { get; set; }

    [Parameter]
    public bool AllowFileManagement { get; set; } = true;

    [Parameter]
    public bool AllowRichText { get; set; } = true;  

    [Parameter]
    public bool AllowRawHtml { get; set; } = true;  

    // parameters only applicable to rich text editor
    [Parameter]
    public RenderFragment ToolbarContent { get; set; }

    [Parameter]
    public string Theme { get; set; }

    [Parameter]
    public string DebugLevel { get; set; }

    public override List<Resource> Resources { get; set; } = new List<Resource>();

    protected override async Task OnInitializedAsync()
    {
        _textEditorProvider = await GetTextEditorProvider();
    }

    protected override void OnParametersSet()
    {
        _textEditorComponent = (builder) =>
        {
            CreateTextEditor(builder);
        };
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if(_textEditor != null)
        {
            _textEditor.Initialize(Content);
        }

        await base.OnAfterRenderAsync(firstRender);
    }

    public async Task<string> GetHtml()
    {
        return await _textEditor.GetContent();
    }

    private void CreateTextEditor(RenderTreeBuilder builder)
    {
        if(_textEditorProvider != null)
        {
            var editorType = Type.GetType(_textEditorProvider.EditorType);
            if (editorType != null)
            {
                builder.OpenComponent(0, editorType);

                //set editor parameters if available.
                var attributes = new Dictionary<string, object>
                {
                    { "AllowFileManagement", AllowFileManagement },
                    { "AllowRichText", AllowRichText },
                    { "AllowRawHtml", AllowRawHtml },
                    { "ReadOnly", ReadOnly }
                };

                if(!string.IsNullOrEmpty(Theme))
                {
                    attributes.Add("Theme", Theme);
                }
                if (!string.IsNullOrEmpty(DebugLevel))
                {
                    attributes.Add("DebugLevel", DebugLevel);
                }
                if (!string.IsNullOrEmpty(Placeholder))
                {
                    attributes.Add("Placeholder", Placeholder);
                }
                if(ToolbarContent != null)
                {
                    attributes.Add("ToolbarContent", ToolbarContent);
                }

                var index = 1;
                foreach(var name in attributes.Keys)
                {
                    if (editorType.GetProperty(name) != null)
                    {
                        builder.AddAttribute(index++, name, attributes[name]);
                    }
                }

                builder.AddComponentReferenceCapture(index, (c) =>
                {
                    _textEditor = (ITextEditor)c;
                });
                builder.CloseComponent();
            }
        }
    }

    private async Task<ITextEditorProvider> GetTextEditorProvider()
    {
        const string DefaultEditorName = "Quill";

        var editorName = await GetTextEditorName(DefaultEditorName);
        var editorProviders = ServiceProvider.GetServices<ITextEditorProvider>();
        var editorProvider = editorProviders.FirstOrDefault(i => i.Name == editorName);
        if(editorProvider == null)
        {
            editorProvider = editorProviders.FirstOrDefault(i => i.Name == DefaultEditorName);
        }

        return editorProvider;
    }

    private async Task<string> GetTextEditorName(string defaultName)
    {
        const string EditorSettingName = "TextEditor";

        var settings = await SettingService.GetSiteSettingsAsync(PageState.Site.SiteId);
        return SettingService.GetSetting(settings, EditorSettingName, defaultName);
    }
}