using System;
using System.IO;
using System.Reflection;
using Dalamud.Game.Command;
using Dalamud.Plugin;
using IronPython.Hosting;
using Microsoft.Scripting.Hosting;

namespace DalamudPython {
    public class Plugin : IDalamudPlugin {
        public string Name => "DalamudPython";

        public DalamudPluginInterface Interface { get; private set; } = null!;

        public ScriptEngine Engine { get; } = Python.CreateEngine();

        private Commands Commands { get; set; } = null!;

        public string ConfigDirectory => Path.Combine(new[] {
            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
            "XIVLauncher",
            "pluginConfigs",
            this.Name,
        });

        public void Initialize(DalamudPluginInterface pluginInterface) {
            this.Interface = pluginInterface ?? throw new ArgumentNullException(nameof(pluginInterface));

            // set a global variable for the plugin interface
            this.Engine.Runtime.Globals.SetVariable("interface", this.Interface);
            // load Dalamud, Lumina, and ImGuiNET
            this.Engine.Runtime.LoadAssembly(Assembly.GetAssembly(typeof(DalamudPluginInterface)));
            this.Engine.Runtime.LoadAssembly(Assembly.GetAssembly(typeof(Lumina.Lumina)));
            this.Engine.Runtime.LoadAssembly(Assembly.GetAssembly(typeof(Lumina.Excel.IExcelRow)));
            this.Engine.Runtime.LoadAssembly(Assembly.GetAssembly(typeof(Lumina.Excel.GeneratedSheets.Achievement)));
            this.Engine.Runtime.LoadAssembly(Assembly.GetAssembly(typeof(ImGuiNET.ImGui)));

            this.Commands = new Commands(this);

            foreach (var command in Commands.All) {
                this.Interface.CommandManager.AddHandler(command.Key, new CommandInfo(this.Commands.OnCommand) {
                    HelpMessage = command.Value,
                });
            }

            Directory.CreateDirectory(this.ConfigDirectory);
        }

        public void Dispose() {
            foreach (var name in Commands.All.Keys) {
                this.Interface.CommandManager.RemoveHandler(name);
            }

            this.Engine.Runtime.Shutdown();
        }
    }
}