package com.gpl.rpg.atcontentstudio.model;

import java.awt.Image;
import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

import com.gpl.rpg.atcontentstudio.ATContentStudio;
import com.gpl.rpg.atcontentstudio.Notification;
import com.gpl.rpg.atcontentstudio.io.SettingsSave;
import com.gpl.rpg.atcontentstudio.model.GameSource.Type;
import com.gpl.rpg.atcontentstudio.model.gamedata.GameDataSet;
import com.gpl.rpg.atcontentstudio.ui.ProjectsTree.ProjectsTreeModel;
import com.gpl.rpg.atcontentstudio.ui.WorkerDialog;

public class Workspace implements ProjectTreeNode, Serializable {

	private static final long serialVersionUID = 7938633033601384956L;

	public static final String WS_SETTINGS_FILE = ".workspace";

	public static Workspace activeWorkspace;

	public Preferences preferences = new Preferences();
	public File baseFolder;
	public File settingsFile;
	public transient List<ProjectTreeNode> projects = new ArrayList<ProjectTreeNode>();
	public Set<String> projectsName = new HashSet<String>();
	public Map<String, Boolean> projectsOpenByName = new HashMap<String, Boolean>();
	public Set<File> knownMapSourcesFolders = new HashSet<File>();

	public transient ProjectsTreeModel projectsTreeModel = null;

	public Workspace(File workspaceRoot) {
		baseFolder = workspaceRoot;
		if (!workspaceRoot.exists()) {
			try {
				workspaceRoot.mkdir();
			} catch (SecurityException e) {
				Notification.addError("Error creating workspace directory: "
						+ e.getMessage());
				e.printStackTrace();
			}
		}
		settingsFile = new File(workspaceRoot, WS_SETTINGS_FILE);
		if (!settingsFile.exists()) {
			try {
				settingsFile.createNewFile();
			} catch (IOException e) {
				Notification.addError("Error creating workspace datafile: "
						+ e.getMessage());
				e.printStackTrace();
			}
		}
		Notification.addSuccess("New workspace created: "
				+ workspaceRoot.getAbsolutePath());
		save();
	}

	public static void setActive(File workspaceRoot) {
		Workspace w = null;
		File f = new File(workspaceRoot, WS_SETTINGS_FILE);
		if (!workspaceRoot.exists() || !f.exists()) {
			w = new Workspace(workspaceRoot);
		} else {
			w = (Workspace) SettingsSave.loadInstance(f, "Workspace");
			if (w == null) {
				w = new Workspace(workspaceRoot);
			} else {
				w.refreshTransients();
			}
		}
		activeWorkspace = w;
	}

	public static void saveActive() {
		activeWorkspace.save();
	}

	public void save() {
		SettingsSave.saveInstance(this, settingsFile, "Workspace");
	}

	@Override
	public Enumeration<ProjectTreeNode> children() {
		return Collections.enumeration(projects);
	}

	@Override
	public boolean getAllowsChildren() {
		return true;
	}

	@Override
	public TreeNode getChildAt(int arg0) {
		return projects.get(arg0);
	}

	@Override
	public int getChildCount() {
		return projects.size();
	}

	@Override
	public int getIndex(TreeNode arg0) {
		return projects.indexOf(arg0);
	}

	@Override
	public TreeNode getParent() {
		return null;
	}

	@Override
	public boolean isLeaf() {
		return false;
	}

	@Override
	public void childrenAdded(List<ProjectTreeNode> path) {
		path.add(0, this);
		if (projectsTreeModel != null)
			projectsTreeModel.insertNode(new TreePath(path.toArray()));
	}

	@Override
	public void childrenChanged(List<ProjectTreeNode> path) {
		path.add(0, this);
		if (projectsTreeModel != null) projectsTreeModel.changeNode(new TreePath(path.toArray()));
		ATContentStudio.frame.editorChanged(path.get(path.size() - 1));
	}

	@Override
	public void childrenRemoved(List<ProjectTreeNode> path) {
		path.add(0, this);
		if (projectsTreeModel != null)
			projectsTreeModel.removeNode(new TreePath(path.toArray()));
	}

	@Override
	public void notifyCreated() {
		childrenAdded(new ArrayList<ProjectTreeNode>());
		for (ProjectTreeNode node : projects) {
			if (node != null)
				node.notifyCreated();
		}
	}

	@Override
	public String getDesc() {
		return "Workspace: " + baseFolder.getAbsolutePath();
	}

	public static void createProject(final String projectName,
			final File gameSourceFolder, final Project.ResourceSet sourceSet) {
		WorkerDialog.showTaskMessage("Creating project " + projectName + "...",
				ATContentStudio.frame, new Runnable() {
					@Override
					public void run() {
						if (activeWorkspace.projectsName.contains(projectName)) {
							Notification.addError("A project named "
									+ projectName
									+ " already exists in this workspace.");
							return;
						}
						Project p = new Project(activeWorkspace, projectName,
								gameSourceFolder, sourceSet);
						activeWorkspace.projects.add(p);
						activeWorkspace.projectsName.add(projectName);
						activeWorkspace.projectsOpenByName.put(projectName,
								p.open);
						activeWorkspace.knownMapSourcesFolders
								.add(gameSourceFolder);
						p.notifyCreated();
						Notification.addSuccess("Project " + projectName
								+ " successfully created");
						saveActive();
					}
				});
	}

	public static void closeProject(Project p) {
		int index = activeWorkspace.projects.indexOf(p);
		if (index < 0) {
			Notification.addError("Cannot close unknown project " + p.name);
			return;
		}
		p.close();
		ClosedProject cp = new ClosedProject(activeWorkspace, p.name);
		activeWorkspace.projects.set(index, cp);
		activeWorkspace.projectsOpenByName.put(p.name, false);
		cp.notifyCreated();
		saveActive();
	}

	public static void openProject(final ClosedProject cp) {
		WorkerDialog.showTaskMessage("Opening project " + cp.name + "...",
				ATContentStudio.frame, new Runnable() {
					@Override
					public void run() {
						int index = activeWorkspace.projects.indexOf(cp);
						if (index < 0) {
							Notification
									.addError("Cannot open unknown project "
											+ cp.name);
							return;
						}
						cp.childrenRemoved(new ArrayList<ProjectTreeNode>());
						Project p = Project.fromFolder(activeWorkspace,
								new File(activeWorkspace.baseFolder, cp.name));
						p.open();
						activeWorkspace.projects.set(index, p);
						activeWorkspace.projectsOpenByName.put(p.name, true);
						p.notifyCreated();
						saveActive();
					}
				});
	}

	public void refreshTransients() {
		this.projects = new ArrayList<ProjectTreeNode>();
		Set<String> projectsFailed = new HashSet<String>();
		for (String projectName : projectsName) {
			if (projectsOpenByName.get(projectName)) {
				File projRoot = new File(this.baseFolder, projectName);
				if (projRoot.exists()) {
					Project p = Project.fromFolder(this, projRoot);
					if (p != null) {
						projects.add(p);
					} else {
						Notification
								.addError("Failed to open project "
										+ projectName
										+ ". Removing it from workspace (not from filesystem though).");
						projectsFailed.add(projectName);
					}
				} else {
					Notification.addError("Unable to find project "
							+ projectName
							+ "'s root folder. Removing it from workspace");
					projectsFailed.add(projectName);
				}
			} else {
				projects.add(new ClosedProject(this, projectName));
			}
		}
		for (String projectName : projectsFailed) {
			projectsName.remove(projectName);
			projectsOpenByName.remove(projectName);
		}
		notifyCreated();
	}

	@Override
	public Project getProject() {
		return null;
	}

	@Override
	public Image getIcon() {
		return null;
	}

	@Override
	public Image getClosedIcon() {
		return null;
	}

	@Override
	public Image getLeafIcon() {
		return null;
	}

	@Override
	public Image getOpenIcon() {
		return null;
	}

	public static void deleteProject(ClosedProject cp) {
		cp.childrenRemoved(new ArrayList<ProjectTreeNode>());
		activeWorkspace.projects.remove(cp);
		activeWorkspace.projectsOpenByName.remove(cp.name);
		activeWorkspace.projectsName.remove(cp.name);
		if (delete(new File(activeWorkspace.baseFolder, cp.name))) {
			Notification.addSuccess("Closed project " + cp.name
					+ " successfully deleted.");
		} else {
			Notification.addError("Error while deleting closed project "
					+ cp.name + ". Files may remain in the workspace.");
		}
		cp = null;
		saveActive();
	}

	public static void deleteProject(Project p) {
		p.childrenRemoved(new ArrayList<ProjectTreeNode>());
		activeWorkspace.projects.remove(p);
		activeWorkspace.projectsOpenByName.remove(p.name);
		activeWorkspace.projectsName.remove(p.name);
		if (delete(p.baseFolder)) {
			Notification.addSuccess("Project " + p.name
					+ " successfully deleted.");
		} else {
			Notification.addError("Error while deleting project " + p.name
					+ ". Files may remain in the workspace.");
		}
		p = null;
		saveActive();
	}

	private static boolean delete(File f) {
		boolean b = true;
		if (f.isDirectory()) {
			for (File c : f.listFiles())
				b &= delete(c);
		}
		return b &= f.delete();
	}

	@Override
	public GameDataSet getDataSet() {
		return null;
	}

	@Override
	public Type getDataType() {
		return null;
	}

	@Override
	public boolean isEmpty() {
		return projects.isEmpty();
	}

}