using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Rendering;

using System;
using System.Diagnostics.CodeAnalysis;

namespace FastReport.Web.Blazor.Export
{

    internal sealed class ElementContext : IRenderContext
    {
        private readonly IRenderContext _context;
        private int deepLevel = 0;

        public ElementContext(RenderTreeBuilder builder)
            : this(new RenderContext(builder))
        {
            
        }

        public ElementContext(IRenderContext context)
        {
            _context = context;
        }

        public ElementContext(IRenderContext context, string elementName)
            : this(context)
        {
            OpenElement(elementName);
        }

        public void OpenElement(string elementName)
        {
            _context.OpenElement(elementName);
            deepLevel++;
        }

        public bool IsClosed => deepLevel == 0;

        public void CloseElement()
        {
            _context.CloseElement();
            deepLevel--;
        }

        public void Dispose()
        {
            while (deepLevel > 0)
                CloseElement();
        }

        public void AddMarkupContent(string? markupContent) => _context.AddMarkupContent(markupContent);

        public void AddContent(string? textContent) => _context.AddContent(textContent);

        public void AddContent(RenderFragment? fragment) => _context.AddContent(fragment);

        public void AddContent<TValue>(RenderFragment<TValue>? fragment, TValue value) => _context.AddContent(fragment, value);

        public void AddContent(MarkupString markupContent) => _context.AddContent(markupContent);

        public void AddAttribute(string name, bool value) => _context.AddAttribute(name, value);

        public void AddAttribute(string name, string? value) => _context.AddAttribute(name, value);

        public void AddAttribute(string name, MulticastDelegate? value) => _context.AddAttribute(name, value);

        public void AddAttribute(string name, object? value) => _context.AddAttribute(name, value);

        public void OpenComponent<[DynamicallyAccessedMembers(LinkerFlags.All)] TComponent>() where TComponent : notnull, IComponent 
            => _context.OpenComponent<TComponent>();

        public void CloseComponent() => _context.CloseComponent();

        public void AddOnClick(OnClickEventArgs click) => _context.AddOnClick(click);
    }
}