using Microsoft.Azure.NotificationHubs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;

namespace gehGassi.External.Helper
{
	/// <summary>
	/// Vorlage für Pushnotification Nachrichten
	/// </summary>
	public class PushnotificationTemplateGenerator
	{
		public const string Android_Alert = "{ \"notification\": { \"title\" : \"$(title)\", \"body\" : \"$(message)\"} }";
		public const string Android_Alert_Payload = "{ \"notification\": { \"title\" : \"$(title)\", \"body\" : \"$(message)\"}, \"data\": $(payload) }";
		public const string Android_Silent_Payload = "{\"data\": $(payload) }";

		//Änderung auf Version V1
		public const string Android_Alert_v1 = "{\"message\": { \"notification\": { \"title\" : \"$(title)\", \"body\" : \"$(message)\"} } }";
        public const string Android_Alert_Payload_v1 = "{\"message\": { \"notification\": { \"title\" : \"$(title)\", \"body\" : \"$(message)\"}, \"data\": $(payload) } }";
        public const string Android_Silent_Payload_v1 = "{\"message\": {\"data\": $(payload) } }";

        public const string Ios_Alert = "{ \"aps\" : {\"alert\" : {\"title\": \"$(title)\", \"body\": \"$(message)\"}} }";
		public const string Ios_Alert_Payload = "{ \"aps\" : {\"alert\" : {\"title\": \"$(title)\", \"body\": \"$(message)\"}}, $(payload) }";
		public const string Iso_Silent_Payload = "{ \"aps\" : {\"content-available\" : 1, \"apns-priority\": 5, \"sound\" : \"\", \"badge\" : 0}, $(payload) }";

		
		/// <summary>
		/// Erstellt eine Notification-Template für Android
		/// </summary>
		/// <param name="title">Title</param>
		/// <param name="message">Nachricht</param>
		/// <param name="silent">true wenn eine Silent-Message gesendet werden soll, false sonst</param>
		/// <param name="payload">Optional: Payload der mitgesendet werden soll</param>
		/// <returns>Erstelltes Message-Template</returns>
		public static string GetAndroid(string title, string message, bool silent, object payload = null)
		{
			var payloadJson = string.Empty;
			if (payload != null)
			{
				payloadJson = payload is string ? payload.ToString() : JsonSerializer.Serialize(payload);
			}

			return silent switch
			{
				false when payload == null => Android_Alert.Replace("$(title)", title).Replace("$(message)", message),
				false => Android_Alert_Payload.Replace("$(title)", title).Replace("$(message)", message).Replace("$(payload)", payloadJson),
				_ => Android_Silent_Payload.Replace("$(payload)", payloadJson)
			};
		}

        /// <summary>
        /// Erstellt eine Notification-Template für Android V1
        /// </summary>
        /// <param name="title">Title</param>
        /// <param name="message">Nachricht</param>
        /// <param name="silent">true wenn eine Silent-Message gesendet werden soll, false sonst</param>
        /// <param name="payload">Optional: Payload der mitgesendet werden soll</param>
        /// <returns>Erstelltes Message-Template</returns>
        public static string GetAndroidV1(string title, string message, bool silent, object payload = null)
        {
            var payloadJson = string.Empty;
            if (payload != null)
            {
                payloadJson = payload is string ? payload.ToString() : JsonSerializer.Serialize(payload);
            }

            return silent switch
            {
                false when payload == null => Android_Alert_v1.Replace("$(title)", title).Replace("$(message)", message),
                false => Android_Alert_Payload_v1.Replace("$(title)", title).Replace("$(message)", message).Replace("$(payload)", payloadJson),
                _ => Android_Silent_Payload_v1.Replace("$(payload)", payloadJson)
            };
        }

        /// <summary>
        /// Erstellt eine Notification-Template für Ios
        /// </summary>
        /// <param name="title">Title</param>
        /// <param name="message">Nachricht</param>
        /// <param name="silent">true wenn eine Silent-Message gesendet werden soll, false sonst</param>
        /// <param name="payload">Optional: Payload der mitgesendet werden soll</param>
        /// <returns>Erstelltes Message-Template</returns>
        public static string GetIos(string title, string message, bool silent, object payload = null)
		{
			var payloadJson = string.Empty;
			if (payload != null)
			{
				payloadJson = payload is string ? payload.ToString() : JsonSerializer.Serialize(payload);
				if (payloadJson.StartsWith("{") && payloadJson.EndsWith("}"))
				{
					payloadJson = payloadJson.TrimStart('{');
					payloadJson = payloadJson.TrimEnd('}');
				}

			}

			return silent switch
			{
				false when payload == null => Ios_Alert.Replace("$(title)", title).Replace("$(message)", message),
				false => Ios_Alert_Payload.Replace("$(title)", title).Replace("$(message)", message).Replace("$(payload)", payloadJson),
				_ => Iso_Silent_Payload.Replace("$(payload)", payloadJson)
			};
		}
	}

	
}