using System;
using System.CommandLine;
using System.CommandLine.Invocation;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Text;
using System.Text.Json;
using System.Threading;

namespace ESPServer
{
	class Program
	{
		static JsonDocument config;
		static UnitsDatabase db;
		static RegistersContainer registers;

		static void Main(string[] args)
		{
			CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
			config = LoadConfig();
			Logging.Setup();
			db = new UnitsDatabase(config.RootElement.GetProperty("units"));
			registers = new RegistersContainer();
			var rootCommand = new RootCommand();
			var runCommand = new Command("run")
			{
			};
			runCommand.Handler = CommandHandler.Create<string>(RunService);
			rootCommand.AddCommand(runCommand);
			var openhabConfigCommand = new Command("openhab-config")
			{
			};
			openhabConfigCommand.Handler = CommandHandler.Create<string>(GenerateOpenhabConfig);
			rootCommand.AddCommand(openhabConfigCommand);
			rootCommand.InvokeAsync(args).Wait();
		}

		private static void GenerateOpenhabConfig(string obj)
		{
			var root = config.RootElement;
			StringBuilder thingsConfig = new StringBuilder();
			StringBuilder itemsConfig = new StringBuilder();
			thingsConfig.AppendFormat("Bridge modbus:tcp:{0} [ host=\"{1}\", port={2}, id=1 ] {{\n",
				"esp_server",
				root.GetProperty("IP").GetString(),
				root.GetProperty("modbusPort").GetInt32());
			// 
			db.GenerateThingsConfig(thingsConfig);
			db.GenerateItemsConfig(itemsConfig);
			//
			thingsConfig.Append("}\n");

			File.WriteAllText("esp_server.things", thingsConfig.ToString());
			File.WriteAllText("esp_server.items", itemsConfig.ToString());
		}

		private static void RunService(string obj)
		{
			var unitReceiver = new UnitDataReceiver(config.RootElement.GetProperty("port").GetInt32(), db, registers);
			unitReceiver.Start();
			var unitPinger = new UnitPinger(db);
			unitPinger.Start();
			var modbusServer = new ModbusServer(registers);
			modbusServer.Port = config.RootElement.GetProperty("modbusPort").GetInt32();
			modbusServer.Run();
		}

		private static JsonDocument LoadConfig()
		{
			string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
			var config = Path.Combine(assemblyFolder, "esp_server.json");
			string configStr = File.ReadAllText(config);
			return JsonDocument.Parse(configStr);
		}
	}
}