using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Text;
using System.Web.Mvc;
using Kendo.Mvc.UI;
using Kendo.Mvc.UI.Fluent;
using Kreta.Resources;

namespace Kreta.Web.Helpers
{
    public static class MultiSelectExtensions
    {
        public static MultiSelectBuilder KretaMultiSelect(this HtmlHelper helper, string id, string url = null
            , string dataTextField = "Text", string datavalueField = "Value", string groupName = null, Type groupType = null, bool isSingleElementSet = true)
        {
            var multiSelect = helper.Kendo().MultiSelect()
                .Name(id)
                .DataTextField(dataTextField)
                .DataValueField(datavalueField);

            if (!string.IsNullOrWhiteSpace(groupName))
            {
                multiSelect.DataSource(source =>
                {
                    source.Custom()
                    .ServerFiltering(enabled: true)
                    .Transport(transport => transport.Read(read => read.Url(url)))
                    .Group(g => g.Add(groupName, groupType));
                });
            }
            else
            {
                multiSelect.DataSource(source =>
                {
                    source.Custom()
                    .ServerFiltering(enabled: true)
                    .Transport(transport => transport.Read(read => read.Url(url)));
                });
            }

            SetDataBoundEvent(isSingleElementSet, multiSelect);

            return multiSelect;
        }

        public static MultiSelectBuilder KretaMultiSelect(this HtmlHelper helper, string id, List<SelectListItem> items, object htmlAttributes = null, bool isSingleElementSet = true)
        {
            var multiSelect = helper.Kendo().MultiSelect()
            .Name(id)
            .BindTo(items)
            .HtmlAttributes(htmlAttributes);

            SetDataBoundEvent(isSingleElementSet, multiSelect);

            return multiSelect;
        }

        public static MultiSelectBuilder KretaMultiSelectFor<TModel, TProperty>(this HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> selectList, IDictionary<string, object> htmlAttributes = null, bool isSingleElementSet = true)
        {
            var metadata = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);

            if (htmlAttributes == null)
            {
                htmlAttributes = new Dictionary<string, object>();
            }

            if (metadata.IsRequired)
            {
                htmlAttributes.Add("data-labelmsg", metadata.DisplayName + " *");
            }
            else
            {
                htmlAttributes.Add("data-labelmsg", metadata.DisplayName);
            }

            var multiSelect = helper.Kendo()
                .MultiSelectFor(expression)
                .BindTo(selectList)
                .HtmlAttributes(htmlAttributes);

            SetDataBoundEvent(isSingleElementSet, multiSelect);

            return multiSelect;
        }

        public static MultiSelectBuilder KretaMultiSelectFor<TModel, TProperty>(this HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression, string url, string dataTextField = "Text", string datavalueField = "Value", IDictionary<string, object> htmlAttributes = null, bool isSingleElementSet = true)
        {
            var fieldName = ExpressionHelper.GetExpressionText(expression);
            var fullBindingName = helper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(fieldName);
            var metadata = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);
            var value = metadata.Model;

            if (htmlAttributes == null)
            {
                htmlAttributes = new Dictionary<string, object>();
            }

            if (metadata.IsRequired)
            {
                htmlAttributes.Add("data-labelmsg", metadata.DisplayName + " *");
            }
            else
            {
                htmlAttributes.Add("data-labelmsg", metadata.DisplayName);
            }

            var multiSelect = helper.Kendo()
                .MultiSelectFor(expression)
                .DataTextField(dataTextField)
                .DataValueField(datavalueField)
                .DataSource(source =>
                {
                    source.Custom()
                          .Transport(transport =>
                          {
                              transport.Read(
                              read => read.Url(url));
                          });
                })
                .HtmlAttributes(htmlAttributes);

            SetDataBoundEvent(isSingleElementSet, multiSelect);

            return multiSelect;
        }

        public static MultiSelectBuilder KretaMultiSelectNyomtatvany(this HtmlHelper helper, string id, string url, IDictionary<string, object> htmlAttributes = null, bool? grouping = null, string groupName = null, bool isSingleElementSet = true)
        {
            (htmlAttributes ?? (htmlAttributes = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase))).Add("data-labelmsg", id);

            var multiSelect = helper.Kendo().MultiSelect()
                .Name(id)
                .Placeholder(CommonResource.PleaseChoose)
                .AutoClose(autoClose: false)
                .HtmlAttributes(htmlAttributes)
                .DataTextField("Text")
                .DataValueField("Value");

            SetDataBoundEvent(isSingleElementSet, multiSelect);

            if (grouping == true && !string.IsNullOrWhiteSpace(groupName))
            {
                multiSelect.DataSource(source =>
                {
                    source.Custom()
                    .Transport(transport => transport.Read(read => read.Url(url)))
                    .Group(g => g.Add(groupName, typeof(string)));
                });
            }
            else
            {
                multiSelect.DataSource(source =>
                {
                    source.Custom()
                    .Transport(transport => transport.Read(read => read.Url(url)));
                });
            }

            multiSelect.Events(e => e.Open("KretaMultiSelectHelper.onOpenDropdownMultiSelect"));

            return multiSelect;
        }

        private static void SetDataBoundEvent(bool isSingleElementSet, MultiSelectBuilder multiSelect)
        {
            if (isSingleElementSet)
            {
                multiSelect.Events(e => e.DataBound("KretaMultiSelectHelper.dataBoundMultiSelect"));
            }
        }

        public static MvcHtmlString RenderSearchPanel(this MultiSelectBuilder helper)
        {
            var labelMsg = "";
            foreach (var item in helper.ToComponent().HtmlAttributes)
            {
                if (string.Equals(item.Key, "data-labelmsg", StringComparison.OrdinalIgnoreCase) && item.Value != null)
                {
                    labelMsg = item.Value.ToString();
                }
            }

            var sb = new StringBuilder();
            sb.Append("<div class=\"searchInputRowHeight\"><div>");
            sb.Append("<label class=\"searchPanelInputLabel\" for=\"").Append(helper.ToComponent().Name).Append("\">").Append(labelMsg).Append("</label>");
            sb.Append("</div><div>");
            sb.Append(helper.ToHtmlString());
            sb.Append("</div></div>");

            return new MvcHtmlString(sb.ToString());
        }

        public static MvcHtmlString RenderSearchPanelSideBar(this MultiSelectBuilder helper, bool allButtons = false)
        {
            var labelMsg = "";
            foreach (var item in helper.ToComponent().HtmlAttributes)
            {
                if (string.Equals(item.Key, "data-labelmsg", StringComparison.OrdinalIgnoreCase) && item.Value != null)
                {
                    labelMsg = item.Value.ToString();
                }
            }

            var name = helper.ToComponent().Name;

            var sb = new StringBuilder();
            sb.Append("<div class=\"searchPanelRow\">");
            sb.Append("<div class=\"searchPanelRowTitle\">");
            sb.Append("<label class=\"searchPanelLabel\" for=\"").Append(name).Append("\">").Append(labelMsg).Append("</label>");
            sb.Append("</div>");
            sb.Append("<div class=\"searchPanelRowValue\">");
            sb.Append(helper.ToHtmlString());

            if (allButtons)
            {
                sb.Append("<div style=\"margin-top: 3px;\">");
                sb.Append("<button id=\"selectAll").Append(name).Append("\" type=\"button\" title=\"").Append(CommonResource.MindenElemKivalasztasa).Append("\" data-role=\"button\" class=\"k-button\" role=\"button\" aria-disabled=\"false\" tabindex=\"0\">+</button>");
                sb.Append("<button id=\"deselectAll").Append(name).Append("\" type=\"button\" title=\"").Append(CommonResource.MindenElemEltavolitasa).Append("\" data-role=\"button\" class=\"k-button\" role=\"button\" aria-disabled=\"false\" tabindex=\"0\" style=\"margin-left: 3px;\">-</button>");
                sb.Append("</div>");
            }

            sb.Append("</div>");
            sb.Append("</div>");

            if (allButtons)
            {
                sb.Append("<script>$(document).ready(function() { ");
                sb.Append("var comp = $(\"#").Append(name).Append("\").data(\"kendoMultiSelect\");");
                sb.Append("$(\"#selectAll").Append(name).Append("\").click(function() {{ var values = []; $.each(comp.dataSource.data(), function(i, v) {{ values.push(v.Value); }}); comp.value(values); }});");
                sb.Append("$(\"#deselectAll").Append(name).Append("\").click(function() {{ comp.value([]); }});");
                sb.Append("});</script>");
            }

            return new MvcHtmlString(sb.ToString());
        }

        public static MvcHtmlString RenderWithName(this MultiSelectBuilder helper, int labelWidth = 6, int inputWidth = 6, string tooltipResource = null, bool isCustomRequired = false)
        {
            var labelMsg = "";
            foreach (var item in helper.ToComponent().HtmlAttributes)
            {
                if (string.Equals(item.Key, "data-labelmsg", StringComparison.OrdinalIgnoreCase) && item.Value != null)
                {
                    labelMsg = item.Value.ToString();
                }
            }

            if (isCustomRequired)
            {
                labelMsg += " *";
            }

            var sb = new StringBuilder();
            if (string.IsNullOrWhiteSpace(tooltipResource))
            {
                AddRenderWithNameBeginingFrame(sb, labelWidth, inputWidth, helper.ToComponent().Name, labelMsg, string.Empty);
            }
            else
            {
                AddRenderWithNameTooltipBeginingFrame(sb, labelWidth, inputWidth, helper.ToComponent().Name, labelMsg, string.Empty, tooltipResource);
            }

            sb.Append(helper.ToHtmlString());
            AddRenderWithNameCloseingFrame(sb);
            return new MvcHtmlString(sb.ToString());
        }

        public static MvcHtmlString RenderWithName(this MultiSelectBuilder helper, string label, int labelWidth = 6, int inputWidth = 6, string tooltipResource = null)
        {
            var sb = new StringBuilder();
            if (string.IsNullOrWhiteSpace(tooltipResource))
            {
                AddRenderWithNameBeginingFrame(sb, labelWidth, inputWidth, helper.ToComponent().Name, label, string.Empty);
            }
            else
            {
                AddRenderWithNameTooltipBeginingFrame(sb, labelWidth, inputWidth, helper.ToComponent().Name, label, string.Empty, tooltipResource);
            }

            sb.Append(helper.ToHtmlString());
            AddRenderWithNameCloseingFrame(sb);

            return new MvcHtmlString(sb.ToString());
        }

        public static MvcHtmlString RenderWithoutName(this MultiSelectBuilder helper, int inputWidth = 12, string customClass = "")
        {
            var sb = new StringBuilder();
            AddRenderWithNameBeginingFrame(sb, 0, inputWidth, helper.ToComponent().Name, string.Empty, customClass);

            sb.Append(helper.ToHtmlString());
            AddRenderWithNameCloseingFrame(sb);

            return new MvcHtmlString(sb.ToString());
        }

        private static void AddRenderWithNameBeginingFrame(StringBuilder sb, int labelWidth, int inputWidth, string controlName, string labelMsg, string customClass)
        {
            sb.AppendFormat("<div class=\"{0} {1} \">", BootsrapHelper.GetSizeClasses(labelWidth), customClass);
            sb.AppendFormat("<label class=\"windowInputLabel\" for=\"{0}\">{1}</label>", controlName, labelMsg);
            sb.AppendFormat("</div><div class=\"{0} {1}\">", BootsrapHelper.GetSizeClasses(inputWidth), customClass);
        }

        private static void AddRenderWithNameTooltipBeginingFrame(StringBuilder sb, int labelWidth, int inputWidth, string controlName, string labelMsg, string customClass, string tooltipResource)
        {
            sb.AppendFormat("<div class=\"{0} {1} kretaLabelTooltip \">", BootsrapHelper.GetSizeClasses(labelWidth), customClass);
            sb.AppendFormat("<label class=\"windowInputLabel\" for=\"{0}\">{1}", controlName, labelMsg);
            sb.Append("&nbsp;<img class='kretaLabelTooltipImg' />");
            sb.AppendFormat("<span class=\"kretaLabelTooltipText\">{0}</span>", tooltipResource);
            sb.Append("</label>");
            sb.AppendFormat("</div><div class=\"{0} {1}\">", BootsrapHelper.GetSizeClasses(inputWidth), customClass);
        }

        private static void AddRenderWithNameCloseingFrame(StringBuilder sb)
        {
            sb.Append("</div>");
        }
    }
}