package org.hedgewars.hedgeroid;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Collections;
import java.util.List;

import org.hedgewars.hedgeroid.R;
import org.hedgewars.hedgeroid.Datastructures.FrontendDataUtils;
import org.hedgewars.hedgeroid.Datastructures.MapRecipe;
import org.hedgewars.hedgeroid.Datastructures.Scheme;
import org.hedgewars.hedgeroid.Datastructures.Schemes;
import org.hedgewars.hedgeroid.Datastructures.Weaponset;
import org.hedgewars.hedgeroid.Datastructures.Weaponsets;
import org.hedgewars.hedgeroid.util.FileUtils;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

public class SettingsFragment extends Fragment implements RoomStateManager.Observer {
	private static final String TAG = SettingsFragment.class.getSimpleName();
	
	private Spinner styleSpinner, schemeSpinner, weaponsetSpinner, themeSpinner;
	private ImageView themeIcon;
	
	private List<String> styles;
	private List<Scheme> schemes;
	private List<Weaponset> weaponsets;
	private List<String> themes;
	
	private RoomStateManager stateManager;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View v = inflater.inflate(R.layout.fragment_settings, container, false);
		themeIcon = (ImageView)v.findViewById(R.id.imgTheme);
		
		try {
			styles = FrontendDataUtils.getGameStyles(getActivity());
			schemes = Schemes.loadAllSchemes(getActivity());
			weaponsets = Weaponsets.loadAllWeaponsets(getActivity());
			themes = FrontendDataUtils.getThemes(getActivity());
		} catch (IOException e) {
			Toast.makeText(getActivity().getApplicationContext(), R.string.error_missing_sdcard_or_files, Toast.LENGTH_LONG).show();
			getActivity().finish();
			return null;
		}
		
		Collections.sort(styles, String.CASE_INSENSITIVE_ORDER);
		Collections.sort(schemes, Scheme.NAME_ORDER);
		Collections.sort(weaponsets, Weaponset.NAME_ORDER);
		Collections.sort(themes, String.CASE_INSENSITIVE_ORDER);
		
		styleSpinner = prepareSpinner(v, R.id.spinGameplay, styles, styleSelectedListener);
		schemeSpinner = prepareSpinner(v, R.id.spinGamescheme, Schemes.toNameList(schemes), schemeSelectedListener);
		weaponsetSpinner = prepareSpinner(v, R.id.spinweapons, Weaponsets.toNameList(weaponsets), weaponsetSelectedListener);
		themeSpinner = prepareSpinner(v, R.id.spinTheme, themes, themeSelectedListener);
		
		stateManager.registerObserver(this);

		if(stateManager.getGameStyle() != null) {
			styleSpinner.setSelection(styles.indexOf(stateManager.getGameStyle()), false);
		}
		if(stateManager.getScheme() != null) {
			schemeSpinner.setSelection(getSchemePosition(schemes, stateManager.getScheme().name), false);
		}
		if(stateManager.getWeaponset() != null) {
			weaponsetSpinner.setSelection(getWeaponsetPosition(weaponsets, stateManager.getWeaponset().name), false);
		}
		if(stateManager.getMapRecipe() != null) {
			themeSpinner.setSelection(themes.indexOf(stateManager.getMapRecipe().theme), false);
		}
		
		setChiefState(stateManager.getChiefStatus());
		
		return v;
	}
	
	private static Spinner prepareSpinner(View v, int id, List<String> items, OnItemSelectedListener itemSelectedListener) {
		Spinner spinner = (Spinner)v.findViewById(id);
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(v.getContext(), R.layout.listview_item, items);
		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
		spinner.setAdapter(adapter);
		spinner.setOnItemSelectedListener(itemSelectedListener);
		return spinner;
	}
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		try {
			stateManager = ((RoomStateManager.Provider)getActivity()).getRoomStateManager();
		} catch(ClassCastException e) {
			throw new RuntimeException("Hosting activity must implement RoomStateManager.Provider.", e);
		}
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		stateManager.unregisterObserver(this);
	}
	
	private static int getSchemePosition(List<Scheme> schemes, String scheme) {
		for(int i=0; i<schemes.size(); i++) {
			if(schemes.get(i).name.equals(scheme)) {
				return i;
			}
		}
		return -1;
	}
	
	private static int getWeaponsetPosition(List<Weaponset> weaponsets, String weaponset) {
		for(int i=0; i<weaponsets.size(); i++) {
			if(weaponsets.get(i).name.equals(weaponset)) {
				return i;
			}
		}
		return -1;
	}
	
	private void setChiefState(boolean chiefState) {
		styleSpinner.setEnabled(chiefState);
		schemeSpinner.setEnabled(chiefState);
		weaponsetSpinner.setEnabled(chiefState);
		themeSpinner.setEnabled(chiefState);
		
		if(chiefState) {
			stateManager.changeGameStyle(styles.get(styleSpinner.getSelectedItemPosition()));
			stateManager.changeScheme(schemes.get(schemeSpinner.getSelectedItemPosition()));
			stateManager.changeWeaponset(weaponsets.get(weaponsetSpinner.getSelectedItemPosition()));
			stateManager.changeMapTheme(themes.get(themeSpinner.getSelectedItemPosition()));
		}
	}
	
	private final OnItemSelectedListener styleSelectedListener = new OnItemSelectedListener() {
		public void onItemSelected(AdapterView<?> adapter, View v, int position, long arg3) {
			stateManager.changeGameStyle(styles.get(position));
		}
		public void onNothingSelected(AdapterView<?> arg0) {}
	};
	
	private final OnItemSelectedListener schemeSelectedListener = new OnItemSelectedListener() {
		public void onItemSelected(AdapterView<?> adapter, View v, int position, long arg3) {
			stateManager.changeScheme(schemes.get(position));
		}
		public void onNothingSelected(AdapterView<?> arg0) {}
	};
	
	private final OnItemSelectedListener weaponsetSelectedListener = new OnItemSelectedListener() {
		public void onItemSelected(AdapterView<?> adapter, View v, int position, long arg3) {
			stateManager.changeWeaponset(weaponsets.get(position));
		}
		public void onNothingSelected(AdapterView<?> arg0) {}
	};
	
	private final OnItemSelectedListener themeSelectedListener = new OnItemSelectedListener() {
		public void onItemSelected(AdapterView<?> adapter, View v, int position, long arg3) {
			stateManager.changeMapTheme(themes.get(position));
			String theme = themes.get(position);
			try {
				File iconFile = new File(FileUtils.getDataPathFile(getActivity()), "Themes/" + theme + "/icon@2X.png");
				Drawable themeIconDrawable = Drawable.createFromPath(iconFile.getAbsolutePath());
				themeIcon.setImageDrawable(themeIconDrawable);
			} catch (FileNotFoundException e) {
				Log.e("SettingsFragment", "Unable to find preview for theme "+theme, e);
			}
		};
		public void onNothingSelected(AdapterView<?> arg0) {};
	};
	
	public void onChiefStatusChanged(boolean isChief) {
		setChiefState(isChief);
	}
	
	public void onGameStyleChanged(String gameStyle) {
		styleSpinner.setSelection(styles.indexOf(gameStyle));
	}
	
	public void onMapChanged(MapRecipe recipe) {
		themeSpinner.setSelection(themes.indexOf(recipe.theme));
	}
	
	public void onSchemeChanged(Scheme scheme) {
		schemeSpinner.setSelection(getSchemePosition(schemes, scheme.name));
	}
	
	public void onWeaponsetChanged(Weaponset weaponset) {
		weaponsetSpinner.setSelection(getWeaponsetPosition(weaponsets, weaponset.name));
	}
}