package igwmod.api;

import java.awt.Desktop;
import java.io.File;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import net.minecraft.client.Minecraft;
import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextFormatting;
import net.minecraftforge.client.ClientCommandHandler;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.common.config.Configuration;
import net.minecraftforge.fml.client.FMLClientHandler;
import net.minecraftforge.fml.common.FMLCommonHandler;
import net.minecraftforge.fml.common.Loader;
import net.minecraftforge.fml.common.ModContainer;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.gameevent.TickEvent;
import net.minecraftforge.fml.relauncher.Side;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

/**
 * This class is meant to be copied to your own mod which implements IGW-Mod. When properly implemented by instantiating a new instance somewhere in your mod
 * loading stage, this will notify the player when it doesn't have IGW in the instance. It also needs to have the config option enabled to
 * notify the player. This config option will be generated in its own config file.
 * @author MineMaarten https:github.com/MineMaarten/IGW-mod
 */
public class IGWSupportNotifier{
    private String supportingMod;
    private static final String LATEST_DL_URL = "https://minecraft.curseforge.com/projects/in-game-wiki-mod/files/latest";

    /**
     * Needs to be instantiated somewhere in your mod's loading stage.
     */
    public IGWSupportNotifier(){
        if(FMLCommonHandler.instance().getSide() == Side.CLIENT && !Loader.isModLoaded("IGWMod")) {
            File dir = new File(".", "config");
            Configuration config = new Configuration(new File(dir, "IGWMod.cfg"));
            config.load();

            if(config.get(Configuration.CATEGORY_GENERAL, "enable_missing_notification", true, "When enabled, this will notify players when IGW-Mod is not installed even though mods add support.").getBoolean()) {
                ModContainer mc = Loader.instance().activeModContainer();
                String modid = mc.getModId();
                List<ModContainer> loadedMods = Loader.instance().getActiveModList();
                for(ModContainer container : loadedMods) {
                    if(container.getModId().equals(modid)) {
                        supportingMod = container.getName();
                        MinecraftForge.EVENT_BUS.register(this);
                        ClientCommandHandler.instance.registerCommand(new CommandDownloadIGW());
                        break;
                    }
                }
            }
            config.save();
        }
    }

    @SubscribeEvent
    public void onPlayerJoin(TickEvent.PlayerTickEvent event){
        if(event.player.world.isRemote && event.player == FMLClientHandler.instance().getClientPlayerEntity()) {
            event.player.sendMessage(ITextComponent.Serializer.jsonToComponent("[\"" + TextFormatting.GOLD + "The mod " + supportingMod + " is supporting In-Game Wiki mod. " + TextFormatting.GOLD + "However, In-Game Wiki isn't installed! " + "[\"," + "{\"text\":\"Download Latest\",\"color\":\"green\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/igwmod_download\"}}," + "\"]\"]"));
            FMLCommonHandler.instance().bus().unregister(this);
        }
    }

    private class CommandDownloadIGW extends CommandBase{

        @Override
        public int getRequiredPermissionLevel(){
            return -100;
        }

        @Override
        public String getName(){
            return "igwmod_download";
        }

        @Override
        public String getUsage(ICommandSender p_71518_1_){
            return getName();
        }

        @Override
        public void execute(MinecraftServer server, ICommandSender sender, String[] args) throws CommandException{
            new ThreadDownloadIGW();
        }
    }

    private class ThreadDownloadIGW extends Thread{

        public ThreadDownloadIGW(){
            setName("IGW-Mod Download Thread");
            start();
        }

        @Override
        public void run(){

            try {
                if(Minecraft.getMinecraft().player != null) Minecraft.getMinecraft().player.sendMessage(new TextComponentString("Downloading IGW-Mod..."));

                URL url = new URL(LATEST_DL_URL);
                URLConnection connection = url.openConnection();
                connection.connect();
                File dir = new File(".", "mods");
                File tempFile = File.createTempFile("IGW-Mod.jar", "");
                FileUtils.copyURLToFile(url, tempFile);

                ZipFile jar = new ZipFile(tempFile.getAbsolutePath());
                Enumeration<? extends ZipEntry> entries = jar.entries();
                InputStream mcmodInfo = null;
                while(entries.hasMoreElements()) {
                    ZipEntry entry = entries.nextElement();
                    if(entry.getName().equals("mcmod.info")) {
                        mcmodInfo = jar.getInputStream(entry);
                        break;
                    }
                }
                JsonParser parser = new JsonParser();
                JsonObject obj = (JsonObject)((JsonArray)parser.parse(IOUtils.toString(mcmodInfo))).get(0);
                jar.close();
                String version = obj.get("version").getAsString();
                String mcVersion = obj.get("mcversion").getAsString();
                File renamedFile = new File(String.format("." + File.separator + "mods" + File.separator + "IGW-Mod-%s-%s-universal.jar", mcVersion, version));
                FileUtils.copyFile(tempFile, renamedFile);
                if(Minecraft.getMinecraft().player != null) Minecraft.getMinecraft().player.sendMessage(new TextComponentString(TextFormatting.GREEN + "Successfully downloaded. Restart Minecraft to apply."));
                Desktop.getDesktop().open(dir);
                if(!Loader.MC_VERSION.equals(mcVersion)) {
                    if(Minecraft.getMinecraft().player != null) Minecraft.getMinecraft().player.sendMessage(new TextComponentString(TextFormatting.RED + "The version of Minecraft you are running doesn't seem to match the version of IGW-Mod that has been downloaded. The mod may not work."));
                }

                finalize();
            } catch(Throwable e) {
                e.printStackTrace();
                if(Minecraft.getMinecraft().player != null) Minecraft.getMinecraft().player.sendMessage(new TextComponentString(TextFormatting.RED + "Failed to download"));
                try {
                    finalize();
                } catch(Throwable e1) {
                    e1.printStackTrace();
                }
            }
        }

    }
}
