using Microsoft.AspNetCore.Mvc.Localization;
using Microsoft.Extensions.Localization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Sarand.OperationsMgr
{
	// <summary>
	/// Dummy class to group shared resources - named as per '.resx' file in root namespace.
	/// <para>Required to create the IStringLocalizer instance using the type from the class.</para>
	/// <para>Name of the class is used as the prefix for localisation filenames.</para>
	/// <para>Resource files are in the Localization ResourcesPath in Startup.cs.</para>
	/// </summary>
	public class OpnProperties { }
	// Class must be in Root/Default Namespace to reference properties with same name.
	// NB 'Assembly name' must be the same as 'Default Namespace' until 'Root Namespace' can be set (.Net Core 2.1?).
	// Ref. Project Properties - Application.
}

namespace Sarand.OperationsMgr.Web.App
{
	//=======================================================================
	public class OpnLocaliser
	{
		//-------------------------------------------------------------------
		// Data members.
		private readonly IStringLocalizer<OpnProperties> opnLocalizer;
		private readonly IHtmlLocalizer<OpnProperties> opnHtmlLocalizer;

		//-------------------------------------------------------------------
		/// <summary>
		///  Localisers are supplied using construction injection.
		/// </summary>
		public OpnLocaliser (IStringLocalizer<OpnProperties> opnLocalizer, IHtmlLocalizer<OpnProperties> opnHtmlLocalizer)
		{
			this.opnLocalizer = opnLocalizer;
			this.opnHtmlLocalizer = opnHtmlLocalizer;
		}

		//-------------------------------------------------------------------
		/// <summary>Retrieve localised text.</summary>
		public LocalizedString GetText (string key)
		{
			return GetText(key, new object[] { });
		}
		public LocalizedString GetText (string key, string param)
		{
			return GetText(key, new object[] { param });
		}
		public LocalizedString GetText (string key, string param1, string param2)
		{
			return GetText(key, new object[] { param1, param2 });
		}
		public LocalizedString GetText (string key, object[] parameters)
		{
			return opnLocalizer.GetString(key, parameters);
		}
		public LocalizedString this[String key]
		{
			get { return GetText(key); }
		}
		public LocalizedString this[String key, String param]
		{
			get { return GetText(key, param); }
		}
		public LocalizedString this[String key, String param1, String param2]
		{
			get { return GetText(key, param1, param2); }
		}

		//-------------------------------------------------------------------
		/// <summary>
		/// Localised HTML text.
		/// <para>Line delimiters changed to '<br/>'.</para>
		/// </summary>
		public LocalizedString GetHtmlText (string key)
		{
			LocalizedString localisedText = GetText(key);
			String value = localisedText.Value;
			// Replace all line delimiters.
			value = value.Replace("\r\n", "\n").Replace("\n", "<br/>").Replace("\r", "<br/>");
			return new LocalizedString(localisedText, value, localisedText.ResourceNotFound);
		}

		//-------------------------------------------------------------------
		/// <summary>
		/// Localised javascript string.
		/// <para>All quotes are escaped.</para>
		/// </summary>
		public LocalizedString GetJavascriptText (string key)
		{
			LocalizedString localisedText = GetText(key);
			return new LocalizedString(localisedText, EscapeJavascriptText(localisedText.Value), localisedText.ResourceNotFound);
		}
		public String EscapeJavascriptText (string value)
		{
			// Escape all quotes.
			value = value.Replace("'", "\\'").Replace("\"", "\\\"");
			return value;
		}
	}
	//=======================================================================
}