using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Reflection;

using Harmony;

using GamecraftModdingAPI.Utility;
using GamecraftModdingAPI.Events;

namespace GamecraftModdingAPI
{
    /// <summary>
    /// The main class of the GamecraftModdingAPI.
    /// Use this to initialize the API before calling it.
    /// </summary>
    static class Main
    {
        private static HarmonyInstance harmony;

        /// <summary>
        /// Initializes the GamecraftModdingAPI. 
        /// This should be called ASAP after Gamecraft starts up.
        /// Ideally, this should be called from your main Plugin class's OnApplicationStart() method.
        /// </summary>
        public static void Init()
        {
            var currentAssembly = Assembly.GetExecutingAssembly();
            if (harmony == null)
            {
                harmony = HarmonyInstance.Create(currentAssembly.GetName().Name);
                harmony.PatchAll(currentAssembly);
            }
            // create default event emitters
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.ApplicationInitialized, "GamecraftModdingAPIApplicationInitializedEventEmitter", false));
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.Menu, "GamecraftModdingAPIMenuActivatedEventEmitter", false));
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.MenuSwitchedTo, "GamecraftModdingAPIMenuSwitchedToEventEmitter", false)); // TODO
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.Game, "GamecraftModdingAPIGameActivatedEventEmitter", false));
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.GameReloaded, "GamecraftModdingAPIGameReloadedEventEmitter", false)); // TODO
            EventManager.AddEventEmitter(new SimpleEventEmitterEngine(EventType.GameSwitchedTo, "GamecraftModdingAPIGameSwitchedToEventEmitter", false)); // TODO
            Logging.Log($"{currentAssembly.GetName().Name} {currentAssembly.GetName().Version} init & patch complete");
        }

        /// <summary>
        /// Shuts down & cleans up the GamecraftModdingAPI.
        /// This should be called ASAP before Gamecraft quits.
        /// Ideally, this should be called from your main Plugin class's OnApplicationQuit() method.
        /// </summary>
        public static void Shutdown()
        {
            var currentAssembly = Assembly.GetExecutingAssembly();
            harmony.UnpatchAll(currentAssembly.GetName().Name);
            Logging.Log($"{currentAssembly.GetName().Name} {currentAssembly.GetName().Version} shutdown & unpatch complete");
        }
    }
}