package noppes.npcs.controllers;

import java.io.File;
import java.io.FileInputStream;
import java.util.*;

import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import noppes.npcs.CustomNpcs;
import noppes.npcs.LogWriter;
import noppes.npcs.NoppesStringUtils;
import noppes.npcs.constants.EnumOptionType;
import noppes.npcs.scripted.handler.IDialogHandler;
import noppes.npcs.scripted.handler.data.IDialog;
import noppes.npcs.scripted.handler.data.IDialogCategory;
import noppes.npcs.util.NBTJsonUtil;

public class DialogController implements IDialogHandler {
	public HashMap<Integer,DialogCategory> categories = new HashMap<Integer, DialogCategory>();
	public HashMap<Integer,Dialog> dialogs = new HashMap<Integer, Dialog>();
	public static DialogController instance;

	private int lastUsedDialogID = 0;
	private int lastUsedCatID = 0;
	
	public DialogController(){
		instance = this;
		load();
	}
	
	public void load(){
		LogWriter.info("Loading Dialogs");
		loadCategories();
		LogWriter.info("Done loading Dialogs");
	}
	
	private void loadCategories(){
		categories.clear();
		dialogs.clear();

		lastUsedCatID = 0;
		lastUsedDialogID = 0;
		
		try {
	        File file = new File(CustomNpcs.getWorldSaveDirectory(), "dialog.dat");
	        if(file.exists()){
	        	loadCategoriesOld(file);
		        file.delete();
		        file = new File(CustomNpcs.getWorldSaveDirectory(), "dialog.dat_old");
		        if(file.exists())
		        	file.delete();
		        return;
	        }
		} catch (Exception e) {
			LogWriter.except(e);
		}

		File dir = getDir();
		if(!dir.exists()){
			dir.mkdir();
			loadDefaultDialogs();
		}
		else{
			for(File file : dir.listFiles()){
				if(!file.isDirectory())
					continue;
				DialogCategory category = loadCategoryDir(file);
				Iterator<Integer> ite = category.dialogs.keySet().iterator();
				while(ite.hasNext()){
					int id = ite.next();
					if(id > lastUsedDialogID)
						lastUsedDialogID = id;
					Dialog dialog = category.dialogs.get(id);
					if(dialogs.containsKey(id)){
						LogWriter.error("Duplicate id " + dialog.id + " from category " + category.title);
						ite.remove();
					}
					else{
						dialogs.put(id, dialog);
					}
				}
				lastUsedCatID++;
				category.id = lastUsedCatID;
				categories.put(category.id, category);
			}
		}
	}
	private DialogCategory loadCategoryDir(File dir) {
		DialogCategory category = new DialogCategory();
		category.title = dir.getName();
		for(File file : dir.listFiles()){
			if(!file.isFile() || !file.getName().endsWith(".json"))
				continue;
			try{
				Dialog dialog = new Dialog();
				dialog.id = Integer.parseInt(file.getName().substring(0, file.getName().length() - 5));
				dialog.readNBTPartial(NBTJsonUtil.LoadFile(file));
				category.dialogs.put(dialog.id, dialog);
				dialog.category = category;
			}
			catch(Exception e){
				LogWriter.error("Error loading: " + file.getAbsolutePath(), e);
			}
		}
		return category;
	}

	private void loadCategoriesOld(File file) throws Exception{
		File dir = getDir();
		if(!dir.exists()){
			dir.mkdir();
		}
        NBTTagCompound nbttagcompound1 = CompressedStreamTools.readCompressed(new FileInputStream(file));
        NBTTagList list = nbttagcompound1.getTagList("Data", 10);
        if(list == null)
        	return;
        
        for(int i = 0; i < list.tagCount(); i++){
            DialogCategory category = new DialogCategory();
            category.readNBT(list.getCompoundTagAt(i));
            saveCategory(category);
            Iterator<Map.Entry<Integer, Dialog>> ita = category.dialogs.entrySet().iterator();
            while(ita.hasNext()){
            	Map.Entry<Integer, Dialog> entry = ita.next();
            	Dialog dialog = entry.getValue();
            	dialog.id = entry.getKey();
            	dialog.category = category;
            	if(dialogs.containsKey(dialog.id))
            		ita.remove();
            	else{
            		saveDialog(category.id, dialog);
            	}
            }
            
        }
	}

	private void loadDefaultDialogs() {
		DialogCategory cat = new DialogCategory();
		cat.id = lastUsedCatID++;
		cat.title = "Villager";
		
		Dialog dia1 = new Dialog();
		dia1.id = 1;
		dia1.category = cat;
		dia1.title = "Start";
		dia1.text = "Hello {player}, "+'\n'+'\n'+"Welcome to our village. I hope you enjoy your stay";
		
		Dialog dia2 = new Dialog();
		dia2.id = 2;
		dia2.category = cat;
		dia2.title = "Ask about village";
		dia2.text = "This village has been around for ages. Enjoy your stay here.";
		
		Dialog dia3 = new Dialog();
		dia3.id = 3;
		dia3.category = cat;
		dia3.title = "Who are you";
		dia3.text = "I'm a villager here. I have lived in this village my whole life.";
		
		cat.dialogs.put(dia1.id, dia1);
		cat.dialogs.put(dia2.id, dia2);
		cat.dialogs.put(dia3.id, dia3);
		

		DialogOption option = new DialogOption();
		option.title = "Tell me something about this village";
		option.dialogId = 2;
		option.optionType = EnumOptionType.DialogOption;
		
		DialogOption option2 = new DialogOption();
		option2.title = "Who are you?";
		option2.dialogId = 3;
		option2.optionType = EnumOptionType.DialogOption;

		DialogOption option3 = new DialogOption();
		option3.title = "Goodbye";
		option3.optionType = EnumOptionType.QuitOption;
		
		dia1.options.put(0, option2);
		dia1.options.put(1, option);
		dia1.options.put(2, option3);
		

		DialogOption option4 = new DialogOption();
		option4.title = "Back";
		option4.dialogId = 1;

		dia2.options.put(1, option4);
		dia3.options.put(1, option4);
		lastUsedDialogID = 3;
		saveCategory(cat);
		saveDialog(cat.id, dia1);
		saveDialog(cat.id, dia2);
		saveDialog(cat.id, dia3);
	}
	
	public void saveCategory(DialogCategory category){
		category.title = NoppesStringUtils.cleanFileName(category.title);
		if(categories.containsKey(category.id)){
			DialogCategory currentCategory = categories.get(category.id);
			if(!currentCategory.title.equals(category.title)){
				while(containsCategoryName(category.title))
					category.title += "_";
				File newdir = new File(getDir(), category.title);
				File olddir = new File(getDir(), currentCategory.title);
				if(newdir.exists())
					return;
				if(!olddir.renameTo(newdir))
					return;
			}
			category.dialogs = currentCategory.dialogs;
		}
		else{
			if(category.id < 0){
				lastUsedCatID++;
				category.id = lastUsedCatID;
			}
			while(containsCategoryName(category.title))
				category.title += "_";
			File dir = new File(getDir(), category.title);
			if(!dir.exists())
				dir.mkdirs();
		}
		categories.put(category.id, category);
	}
	
	public void removeCategory(int category){
		DialogCategory cat = categories.get(category);
		if(cat == null)
			return;
		File dir = new File(getDir(), cat.title);
		if(!dir.delete())
			return;
		for(int dia : cat.dialogs.keySet())
			dialogs.remove(dia);
		categories.remove(category);
	}
	
	private boolean containsCategoryName(String name) {
		name = name.toLowerCase();
		for(DialogCategory cat : categories.values()){
			if(cat.title.toLowerCase().equals(name))
				return true;
		}
		return false;
	}
	private boolean containsDialogName(DialogCategory category, Dialog dialog) {
		for(Dialog dia : category.dialogs.values()){
			if(dia.id != dialog.id && dia.title.equalsIgnoreCase(dialog.title))
				return true;
		}
		return false;
	}
	public Dialog saveDialog(int categoryId, Dialog dialog){
		DialogCategory category = categories.get(categoryId);
		if(category == null)
			return dialog;
		dialog.category = category;

		while(containsDialogName(dialog.category, dialog)){
			dialog.title = dialog.title + "_";
		}
		if(dialog.id < 0){
			lastUsedDialogID++;
			dialog.id = lastUsedDialogID;
		}
		
    	dialogs.put(dialog.id, dialog);
    	category.dialogs.put(dialog.id, dialog);
    	
    	File dir = new File(getDir(), category.title);
    	if(!dir.exists())
    		dir.mkdirs();

    	File file = new File(dir, dialog.id + ".json_new");
    	File file2 = new File(dir, dialog.id + ".json");
    	
    	try {
			NBTJsonUtil.SaveFile(file, dialog.writeToNBTPartial(new NBTTagCompound()));
			if(file2.exists())
				file2.delete();
			file.renameTo(file2);
		} catch (Exception e) {
			LogWriter.except(e);
		}
		return dialog;
	}
	
	public void removeDialog(Dialog dialog) {
		DialogCategory category = dialog.category;
		File file = new File(new File(getDir(), category.title), dialog.id + ".json");
		if(!file.delete())
			return;
		category.dialogs.remove(dialog.id);
		dialogs.remove(dialog.id);
		
	}
	
	private File getDir(){
		return new File(CustomNpcs.getWorldSaveDirectory(), "dialogs");
	}

	public boolean hasDialog(int dialogId) {
		return dialogs.containsKey(dialogId);
	}

	public Map<String,Integer> getScroll() {
		Map<String,Integer> map = new HashMap<String,Integer>();
		for(DialogCategory category : categories.values()){
			map.put(category.title, category.id);
		}
		return map;
	}

	public List<IDialogCategory> categories() {
		return new ArrayList(this.categories.values());
	}

	public IDialog get(int id) {
		return (IDialog)this.dialogs.get(id);
	}
}