using Grand.Web.Common.Events;
using MediatR;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using Wangkanai.Detection.Models;
using Wangkanai.Detection.Services;

namespace Grand.Web.Common.TagHelpers.Admin;

[HtmlTargetElement("admin-tabstrip")]
public class AdminTabStripTagHelper : TagHelper
{
    private readonly IDetectionService _detectionService;
    private readonly IMediator _mediator;

    public AdminTabStripTagHelper(IMediator mediator, IDetectionService detectionService)
    {
        _mediator = mediator;
        _detectionService = detectionService;
    }

    [HtmlAttributeName("SetTabPos")] public bool SetTabPos { get; set; } = false;

    [HtmlAttributeName("BindGrid")] public bool BindGrid { get; set; } = false;

    [HtmlAttributeName("Name")] public string Name { get; set; }

    [ViewContext] public ViewContext ViewContext { get; set; }

    public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
    {
        ViewContext.ViewData[typeof(AdminTabContentTagHelper).FullName] = new List<string>();
        var _ = await output.GetChildContentAsync();
        var list = (List<string>)ViewContext.ViewData[typeof(AdminTabContentTagHelper).FullName];
        if (_detectionService.Device.Type == Device.Mobile || _detectionService.Device.Type == Device.Tablet)
            SetTabPos = false;

        var selectedTabIndex = GetSelectedTabIndex();

        output.TagName = "div";
        output.Attributes.SetAttribute("id", Name);
        output.Attributes.SetAttribute("style", "display:none");
        var rnd = new Random().Next(0, 100);
        var sb = new StringBuilder();
        sb.AppendLine("<script>");
        sb.AppendLine("$(document).ready(function () {");
        sb.AppendLine($"$('#{Name}').show();");
        sb.AppendLine($"var tab_{rnd} = $('#{Name}').kendoTabStrip({{ ");
        sb.AppendLine($"    tabPosition: '{(SetTabPos ? "left" : "top")}',");
        sb.AppendLine("    animation: { open: { effects: 'fadeIn'} },");
        sb.AppendLine("     select: tabstrip_on_tab_select,");
        if (BindGrid)
            sb.AppendLine("     show: tabstrip_on_tab_show");
        sb.AppendLine("  }).data('kendoTabStrip');");

        var eventMessage = new AdminTabStripCreated(Name);
        await _mediator.Publish(eventMessage);
        foreach (var eventBlock in eventMessage.BlocksToRender)
        {
            sb.AppendLine($"tab_{rnd}.append({{");
            sb.AppendLine($"    text: '{eventBlock.tabname}',");
            sb.AppendLine($"    content: '{eventBlock.content}'");
            sb.AppendLine("});");
        }


        if (BindGrid && selectedTabIndex > 0)
        {
            sb.AppendLine("$(window).load(function() {");
            sb.AppendLine($"  var selectedtab_{rnd} = $('#{Name}').data('kendoTabStrip').select(); ");
            sb.AppendLine($"  tabstrip_on_tab_show(selectedtab_{rnd}, true); ");
            sb.AppendLine("});");
        }

        sb.AppendLine("})");


        sb.AppendLine("</script>");
        sb.AppendLine(
            $"<input type='hidden' id='selected-tab-index' name='selected-tab-index' value='{selectedTabIndex}'>");


        output.PostContent.AppendHtml(string.Concat(list));
        output.PreElement.AppendHtml(sb.ToString());
    }

    private int GetSelectedTabIndex()
    {
        var index = 0;
        var dataKey = "Grand.selected-tab-index";
        if (ViewContext.ViewData[dataKey] is int) index = (int)ViewContext.ViewData[dataKey];
        if (ViewContext.TempData[dataKey] is int) index = (int)ViewContext.TempData[dataKey];

        //ensure it's not negative
        if (index < 0)
            index = 0;

        return index;
    }
}