/**
 * 
 */
package jme3test.blender.config;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListModel;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;

import com.jme3.asset.BlenderKey;
import com.jme3.asset.ModelKey;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.export.Savable;
import com.jme3.export.binary.BinaryExporter;
import com.jme3.export.binary.BinaryImporter;

/**
 * A class that shows a dialog box for blender testing configuration.
 * @author Marcin Roguski (Kaelthas)
 */
public class ConfigDialog extends AbstractConfigDialog {
	private static final long serialVersionUID = 2863364888664674247L;
	private static final Logger LOGGER = Logger.getLogger(ConfigDialog.class.getName());
	
	private String baseFolderName;
	private File configFile;								//the config file
	private Map<String, BlenderKeyConfiguration> configMap;	//the blender key configuration map
	private BlenderKeyConfiguration blenderKeyConfiguration;//the configuration for the files
	private IConfigExecutable		configExecutable;		//this is called after clicking the 'OK' button
	
	/**
	 * Constructor. Builds the whole window and stores its data.
	 * @param testAssetsFolderName the path to test files folder
	 */
	public ConfigDialog(String baseFolderName, IConfigExecutable configExecutable) {
		if(baseFolderName==null) {
			throw new IllegalArgumentException("No test asset folder given!");
		}
		if(configExecutable==null) {
			throw new IllegalArgumentException("No config executable given!");
		}
		this.baseFolderName = baseFolderName;
		this.configExecutable = configExecutable;
		this.configMap = new HashMap<String, ConfigDialog.BlenderKeyConfiguration>();
		
		//setting up version selection (as a folder list in a compo box)
		File baseFolder = new File(baseFolderName);
		if(!baseFolder.exists() || !baseFolder.isDirectory()) {
			throw new IllegalArgumentException("The given base folder path either does not exists or does not point to a directory!");
		}
		File[] folders = baseFolder.listFiles(new FileFilter() {
			@Override
			public boolean accept(File file) {
				return file.isDirectory() && file.getName().charAt(0)!='.';
			}
		});
		for(File folder : folders) {
			((DefaultComboBoxModel)jComboBoxVersionSelection.getModel()).addElement(folder.getName());
			configMap.put(folder.getName(), null);
		}
		this.initListeners();
		
		jComboBoxVersionSelection.setSelectedIndex(0);
	}
	
	/**
	 * This method returns the selected blender key.
	 * @return the selected blender key
	 */
	public BlenderKey getSelectedBlenderKey() {
		return blenderKeyConfiguration.lastUsedKey;
	}
	
	/**
	 * This method prepares the blender files' list.
	 * @param testAssetsFolderName the path to test files folder
	 * @return array of blender files
	 */
	private File[] prepareFilesList(String testAssetsFolderName) {
		File testAssetsFolder = new File(testAssetsFolderName);
		
		//loading blender files
		File[] blenderFiles = testAssetsFolder.listFiles(new FileFilter() {
			@Override
			public boolean accept(File file) {
				return file.isFile() && file.canRead() && file.getName().endsWith(".blend");
			}
		});
		
		//loading the blender files configuration
		File[] files = testAssetsFolder.listFiles(new FileFilter() {
			@Override
			public boolean accept(File file) {
				return file.isFile() && file.canRead() && file.getName().endsWith(".conf");
			}
		});
		if (files == null || files.length == 0) {
			blenderKeyConfiguration = new BlenderKeyConfiguration(blenderFiles.length);
			
		} else {
			BinaryImporter jmeImporter = new BinaryImporter();
			String instructionToUser = files.length==1 ?
					"No other config file to load! No configuration set!" :
					"Please choose different config file!";
			do {
				if (files.length > 1) {
					configFile = (File) JOptionPane.showInputDialog(null, "Choose the config file!", "Config file selection",
							JOptionPane.INFORMATION_MESSAGE, null, files, files[0]);
				} else {
					configFile = files[0];
				}
				if(configFile==null) {
					JOptionPane.showMessageDialog(this, "No config file selected!\nEmpty configuration will be created!",
							  "No configuration selected", JOptionPane.INFORMATION_MESSAGE);
					blenderKeyConfiguration = new BlenderKeyConfiguration(blenderFiles.length);
				} else {
					try {
						Savable loadedData = jmeImporter.load(configFile);
						if (loadedData instanceof BlenderKeyConfiguration) {
							blenderKeyConfiguration = (BlenderKeyConfiguration) loadedData;
						} else {
							LOGGER.warning("Cannot load data drom the given file!");
							JOptionPane.showMessageDialog(this, "The data stored in the config file is of invalid type!\n"
																+ instructionToUser, "Config data error", JOptionPane.ERROR_MESSAGE);
						}
					} catch (IOException e) {
						JOptionPane.showMessageDialog(this, "Unable to load configuration! Reason: " + e.getLocalizedMessage(),
								  "Loading data error", JOptionPane.ERROR_MESSAGE);
						LOGGER.severe("Unable to load configuration");
					} catch (Exception e) {
						JOptionPane.showMessageDialog(this, "Unable to load configuration!",
								  "Loading data error", JOptionPane.ERROR_MESSAGE);
						LOGGER.log(Level.SEVERE, "Unable to load configuration due to unpredicted error!", e);
					}
				}
			} while (blenderKeyConfiguration == null && files.length>1);
		}
		configFile = new File(testAssetsFolder, "test.conf");
		
		jCheckBoxUseModelKey.setSelected(blenderKeyConfiguration.useModelKey);
		
		//enlisting the files in the list
		DefaultListModel defaultListModel = (DefaultListModel) jListBlenderFiles.getModel();
		defaultListModel.removeAllElements();
		for(int i=0; i<blenderFiles.length; ++i) {
			defaultListModel.addElement(new FileListItem(blenderFiles[i]));
		}
		return blenderFiles;
	}

	/**
	 * This method fills the properties panel with blender key data.
	 * @param blenderKey the belnder key data
	 */
	private void setBlenderKey(BlenderKey blenderKey) {
		//setting properties
		BlenderTableModel propertiesModel = (BlenderTableModel) jTableProperties.getModel();
		int rowCount = propertiesModel.getRowCount();
		for(int i=0;i<rowCount;++i) {
			propertiesModel.removeRow(0);
		}
		Field[] fields = blenderKey.getClass().getDeclaredFields();
		for(Field field : fields) {
			
			field.setAccessible(true);
			if(!"animations".equalsIgnoreCase(field.getName()) && 
			   (field.getModifiers() & Modifier.STATIC)==0) {
				try {
					propertiesModel.addRow(new Object[] {field.getName(), field.get(blenderKey)});
				} catch (IllegalArgumentException e) {
					LOGGER.log(Level.SEVERE, e.getMessage(), e);
				} catch (IllegalAccessException e) {
					LOGGER.log(Level.SEVERE, e.getMessage(), e);
				}
			}
		}
		
		//setting animations
		DefaultTableModel animationsModel = (DefaultTableModel) jTableAnimations.getModel();
		rowCount = animationsModel.getRowCount();
		for(int i=0;i<rowCount;++i) {
			animationsModel.removeRow(0);
		}
		Map<String, Map<String, int[]>> animations = blenderKey.getAnimations();
		if(animations!=null) {
			for(Entry<String, Map<String, int[]>> animationEntry : animations.entrySet()) {
				for(Entry<String, int[]> animDataEntry : animationEntry.getValue().entrySet()) {
					int[] frames = animDataEntry.getValue();
					animationsModel.addRow(new Object[] {animationEntry.getKey(), animDataEntry.getKey(),
														 Integer.valueOf(frames[0]), Integer.valueOf(frames[1])});
				}
			}
		}
		
		this.jButtonOK.setEnabled(true);
		this.jButtonOK.requestFocusInWindow();
		this.jButtonAddAnimation.setEnabled(true);
	}
	
	/**
	 * This method stores the current blender config.
	 * @param configuration the blender config to store
	 */
	private void storeConfig(BlenderKeyConfiguration configuration) {
		if(configuration.lastUsedKey!=null) {//reading animations
			DefaultTableModel animationsTableModel = (DefaultTableModel)jTableAnimations.getModel();
			if(configuration.lastUsedKey.getAnimations()!=null) {
				configuration.lastUsedKey.getAnimations().clear();
			}
			int animCounter = 0;
			for(int i=0;i<animationsTableModel.getRowCount();++i) {
				String objectName = (String)animationsTableModel.getValueAt(i, 0);
				String animName = (String)animationsTableModel.getValueAt(i, 1);
				Number startFrame = (Number)animationsTableModel.getValueAt(i, 2);
				Number stopFrame = (Number)animationsTableModel.getValueAt(i, 3);
				if(objectName!=null && animName!=null && startFrame.intValue()<=stopFrame.intValue()) {
					configuration.lastUsedKey.addAnimation(objectName, animName, startFrame.intValue(), stopFrame.intValue());
					++animCounter;
				}
			}
			if(animCounter<animationsTableModel.getRowCount()) {
				JOptionPane.showMessageDialog(ConfigDialog.this, "Some animations had errors!\nThey had not been added!", 
						"Invalid animations definitions", JOptionPane.WARNING_MESSAGE);
			}
		}
		//getting the key type
		configuration.useModelKey = jCheckBoxUseModelKey.isSelected();
		configuration.logLevel = JRadioButtonLevel.getSelectedLevel();
		
		//storing the config
		JmeExporter jmeExporter = new BinaryExporter();
		try {
			if(!jmeExporter.save(configuration, configFile)) {
				JOptionPane.showMessageDialog(ConfigDialog.this, "Unable to save the config data!", "Config save problem", JOptionPane.ERROR_MESSAGE);
			}
		} catch (IOException e) {
			JOptionPane.showMessageDialog(ConfigDialog.this, "Error occured during config saving!\nReason: " + e.getLocalizedMessage(),
					"Config save problem", JOptionPane.ERROR_MESSAGE);
		}
	}
	
	/**
	 * This method initiates components listeners.
	 */
	private void initListeners() {
		//selection of blender version
		jComboBoxVersionSelection.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				//save the previous congifuration
				if(blenderKeyConfiguration!=null) {
					ConfigDialog.this.storeConfig(blenderKeyConfiguration);
					blenderKeyConfiguration = null;
				}
				
				//load new configuration
				File[] blenderFiles = ConfigDialog.this.prepareFilesList(baseFolderName+'/'+jComboBoxVersionSelection.getSelectedItem().toString());
				if(blenderKeyConfiguration.lastUsedKey!=null) {
					for(int i=0;i<blenderFiles.length; ++i) {
						if(blenderFiles[i].getPath().equalsIgnoreCase(blenderKeyConfiguration.lastUsedKey.getName())) {
							jListBlenderFiles.setSelectedIndex(i);
							break;
						}
					}
				}
				if(blenderKeyConfiguration.logLevel==null) {
					blenderKeyConfiguration.logLevel = Level.INFO;
				}
				JRadioButtonLevel.setSelectedLevel(blenderKeyConfiguration.logLevel);
			}
		});
		//selection of the file changes the config on the right
		jListBlenderFiles.addListSelectionListener(new ListSelectionListener() {
			@Override
			public void valueChanged(ListSelectionEvent evt) {
				BlenderKeyConfiguration config = ConfigDialog.this.blenderKeyConfiguration;
				FileListItem selectedItem = (FileListItem) ConfigDialog.this.jListBlenderFiles.getSelectedValue();
				if(selectedItem != null) {
					String fileName = selectedItem.getFile().getName();
					config.lastUsedKey = config.blenderKeys.get(fileName);
					if(config.lastUsedKey==null) {
						config.lastUsedKey = new BlenderKey(selectedItem.getFile().getPath());
						config.blenderKeys.put(fileName, config.lastUsedKey);
					}
					ConfigDialog.this.setBlenderKey(config.lastUsedKey);
				} else {
					config.lastUsedKey = null;
				}
			}
		});
		jTableProperties.getModel().addTableModelListener(new TableModelListener() {
			@Override
			public void tableChanged(TableModelEvent evt) {
				if(evt.getType()==TableModelEvent.UPDATE) {
					BlenderKeyConfiguration config = ConfigDialog.this.blenderKeyConfiguration;
					int row = evt.getFirstRow();
					String name = (String)jTableProperties.getModel().getValueAt(row, 0);
					Object value = jTableProperties.getModel().getValueAt(row, 1);
					try {
						Field field = config.lastUsedKey.getClass().getDeclaredField(name);
						field.setAccessible(true);
						field.set(config.lastUsedKey, value);
					} catch (IllegalArgumentException e) {
						LOGGER.log(Level.SEVERE, e.getMessage(), e);
					} catch (SecurityException e) {
						LOGGER.log(Level.SEVERE, e.getMessage(), e);
					} catch (IllegalAccessException e) {
						LOGGER.log(Level.SEVERE, e.getMessage(), e);
					} catch (NoSuchFieldException e) {
						LOGGER.log(Level.SEVERE, e.getMessage(), e);
					}
				}
			}
		});
		jTableAnimations.getModel().addTableModelListener(new TableModelListener() {
			@Override
			public void tableChanged(TableModelEvent evt) {
				if(evt.getType()==TableModelEvent.INSERT) {
					jButtonRemoveAnimation.setEnabled(true);
				} else if(evt.getType()==TableModelEvent.DELETE && jTableAnimations.getModel().getRowCount()==0) {
					jButtonRemoveAnimation.setEnabled(false);
				}
			}
		});
		jButtonAddAnimation.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				((DefaultTableModel)jTableAnimations.getModel()).addRow(new Object[] {"", "", Integer.valueOf(-1), Integer.valueOf(-1)});
			}
		});
		jButtonRemoveAnimation.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				int row = jTableAnimations.getSelectedRow();
				if(row>=0) {
					((DefaultTableModel)jTableAnimations.getModel()).removeRow(row);
				}
			}
		});
		
		//button listeners
		jButtonOK.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				ConfigDialog.this.storeConfig(blenderKeyConfiguration);
				//running the test
				SwingUtilities.invokeLater(new Runnable() {
					@Override
					public void run() {
						configExecutable.execute(ConfigDialog.this.blenderKeyConfiguration.getKeyToUse(),
												 ConfigDialog.this.blenderKeyConfiguration.logLevel);
					}
				});
				//disposing the config window
				ConfigDialog.this.dispose();
			}
		});
		jButtonCancel.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				ConfigDialog.this.dispose();
			}
		});
	}
	
	/**
	 * This class holds the configuration for all the files.
	 * It can be saved and loaded using jme mechanisms.
	 * @author Marcin Roguski (Kaelthas)
	 */
	public static class BlenderKeyConfiguration implements Savable {
		private Map<String, BlenderKey> blenderKeys;
		private BlenderKey	lastUsedKey;
		private Level		logLevel;
		private boolean		useModelKey;
		
		/**
		 * Constructor for jme serialization.
		 */
		public BlenderKeyConfiguration() {}
		
		/**
		 * Constructor that creates new empty configuration for every blender file.
		 * @param blenderFilesAmount the amount of blender files
		 */
		public BlenderKeyConfiguration(int blenderFilesAmount) {
			blenderKeys = new HashMap<String, BlenderKey>(blenderFilesAmount);
		}
		
		/**
		 * This method returns the key that will be used during the test.
		 * @return the key that will be used during the test
		 */
		public ModelKey getKeyToUse() {
			return useModelKey ? new ModelKey(lastUsedKey.getName()) : lastUsedKey;
		}
		
		@Override
		public void write(JmeExporter ex) throws IOException {
			OutputCapsule oc = ex.getCapsule(this);
			oc.writeStringSavableMap(blenderKeys, "keys", null);
			oc.write(lastUsedKey, "last-key", null);
			oc.write(useModelKey, "use-model-key", false);
			oc.write(logLevel==null ? null : logLevel.getName(), "log-level", Level.INFO.getName());
		}

		@Override
		@SuppressWarnings("unchecked")
		public void read(JmeImporter im) throws IOException {
			InputCapsule ic = im.getCapsule(this);
			blenderKeys =  (Map<String, BlenderKey>) ic.readStringSavableMap("keys", null);
			lastUsedKey = (BlenderKey) ic.readSavable("last-key", null);
			useModelKey = ic.readBoolean("use-model-key", false);
			String logLevelName = ic.readString("log-level", Level.INFO.getName());
			logLevel = logLevelName==null ? Level.INFO : Level.parse(logLevelName);
		}
	}
}