package net.oni2.aeinstaller.backend.mods;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

import net.oni2.aeinstaller.backend.Paths;
import net.oni2.aeinstaller.backend.Settings;
import net.oni2.aeinstaller.backend.Settings.Platform;
import net.oni2.aeinstaller.backend.depot.DepotConfig;
import net.oni2.aeinstaller.backend.depot.DepotManager;
import net.oni2.aeinstaller.backend.depot.model.NodeMod;
import net.oni2.aeinstaller.backend.depot.model.TaxonomyTerm;

/**
 * @author Christian Illy
 */
public class Mod implements Comparable<Mod> {
	private String name = "";
	private int packageNumber = 0;

	private HashSet<Type> types = new HashSet<Type>();
	private ECompatiblePlatform platform = null;
	private String version = "";
	private String creator = "";
	private EBSLInstallType bslInstallType = EBSLInstallType.NORMAL;
	private String description = "";
	private double aeVersion = 0;
	private int zipSize = 0;
	private NodeMod node = null;
	private net.oni2.aeinstaller.backend.depot.model.File file = null;

	private HashSet<Integer> incompatibilities = new HashSet<Integer>();
	private HashSet<Integer> dependencies = new HashSet<Integer>();

	private long localTimestamp = 0;

	/**
	 * Create a new Mod entry from a given Mod-Node
	 * 
	 * @param nm
	 *            Mod-Node
	 */
	public Mod(NodeMod nm) {
		node = nm;
		name = nm.getTitle();
		packageNumber = nm.getPackageNumber();
		platform = nm.getPlatform();
		for (TaxonomyTerm tt : nm.getTypes()) {
			Type t = ModManager.getInstance().getTypeByName(tt.getName());
			types.add(t);
			if (!nm.isTool() && isValidOnPlatform())
				t.addEntry(this);
		}
		version = nm.getVersion();
		creator = nm.getCreator();
		if (nm.getBody() != null)
			description = nm.getBody().getSafe_value();
		file = DepotManager.getInstance().getFile(
				nm.getUploads().firstElement().getFid());
		zipSize = file.getFilesize();

		if (isLocalAvailable())
			updateLocalData();
	}

	/**
	 * Update information for local package existence
	 */
	public void updateLocalData() {
		File config = new File(getLocalPath(), "Mod_Info.cfg");
		File aeicfg = new File(getLocalPath(), "aei.cfg");
		if (config.exists()) {
			try {
				FileInputStream fstream = new FileInputStream(config);
				InputStreamReader isr = new InputStreamReader(fstream);
				BufferedReader br = new BufferedReader(isr);
				String strLine;
				while ((strLine = br.readLine()) != null) {
					if (strLine.indexOf("->") < 1)
						continue;
					if (strLine.indexOf("//") >= 0)
						strLine = strLine.substring(0, strLine.indexOf("//"));
					String[] split = strLine.split("->", 2);
					String sName = split[0].trim();
					String sVal = split[1].trim();
					if (sName.equalsIgnoreCase("AEInstallVersion")) {
						aeVersion = Double.parseDouble(sVal);
					} else if (sName.equalsIgnoreCase("NameOfMod")) {
						if (node == null)
							name = sVal;
					} else if (sName.equalsIgnoreCase("Creator")) {
						if (node == null)
							creator = sVal;
					} else if (sName.equalsIgnoreCase("HasBsl")) {
						if (sVal.equalsIgnoreCase("addon"))
							bslInstallType = EBSLInstallType.ADDON;
					} else if (sName.equalsIgnoreCase("ModVersion")) {
						if (node == null)
							version = sVal;
					} else if (sName.equalsIgnoreCase("Readme")) {
						if (node == null)
							description = sVal.replaceAll("\\\\n", "<br>");
					} else if (sName.equalsIgnoreCase("DependsOn")) {
						String[] depsS = sVal.split(",");
						for (String s : depsS) {
							try {
								int dep = Integer.parseInt(s);
								dependencies.add(dep);
							} catch (NumberFormatException e) {
								System.err
										.format("Mod %05d does contain a non-number dependency: '%s'\n",
												packageNumber, s);
							}
						}
					} else if (sName.equalsIgnoreCase("IncompatibleWith")) {
						String[] confS = sVal.split(",");
						for (String s : confS) {
							try {
								int conf = Integer.parseInt(s);
								incompatibilities.add(conf);
							} catch (NumberFormatException e) {
								System.err
										.format("Mod %05d does contain a non-number incompatibility: '%s'\n",
												packageNumber, s);
							}
						}
					}
				}
				isr.close();
			} catch (FileNotFoundException e) {
			} catch (IOException e) {
				e.printStackTrace();
			}
		} else {
			System.err.println("No config found for mod folder: "
					+ getLocalPath().getPath());
		}
		if (aeicfg.exists()) {
			try {
				FileInputStream fstream = new FileInputStream(aeicfg);
				InputStreamReader isr = new InputStreamReader(fstream);
				BufferedReader br = new BufferedReader(isr);
				String strLine;
				while ((strLine = br.readLine()) != null) {
					if (strLine.indexOf("->") < 1)
						continue;
					if (strLine.indexOf("//") >= 0)
						strLine = strLine.substring(0, strLine.indexOf("//"));
					String[] split = strLine.split("->", 2);
					String sName = split[0].trim();
					String sVal = split[1].trim();
					if (sName.equalsIgnoreCase("Timestamp")) {
						localTimestamp = Long.parseLong(sVal);
					}
				}
				isr.close();
			} catch (FileNotFoundException e) {
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * Create a new Mod entry from the given local mod folder
	 * 
	 * @param folder
	 *            Mod folder with Mod_Info.cfg
	 */
	public Mod(File folder) {
		packageNumber = Integer.parseInt(folder.getName().substring(0, 5));
		updateLocalData();

		platform = ECompatiblePlatform.BOTH;
	}

	/**
	 * @return has separate paths for win/mac/common or not
	 */
	public boolean hasSeparatePlatformDirs() {
		return aeVersion >= 2;
	}

	/**
	 * @return Path to local mod folder
	 */
	public File getLocalPath() {
		final String folderStart = String.format("%05d", packageNumber);

		if (Paths.getModsPath().exists()) {
			for (File f : Paths.getModsPath().listFiles(new FilenameFilter() {
				@Override
				public boolean accept(File d, String fn) {
					return fn.startsWith(folderStart);
				}
			})) {
				return f;
			}
		}

		return new File(Paths.getModsPath(), folderStart);
	}

	/**
	 * @return Is there a newer version on the depot?
	 */
	public boolean isNewerAvailable() {
		if (file != null)
			return file.getTimestamp() > localTimestamp;
		else
			return false;
	}

	/**
	 * @return Mod exists within mods folder
	 */
	public boolean isLocalAvailable() {
		return getLocalPath().exists();
	}

	/**
	 * @return Name of mod
	 */
	public String getName() {
		return name;
	}

	/**
	 * @return the package number
	 */
	public int getPackageNumber() {
		return packageNumber;
	}

	/**
	 * @return the package number as 5 digit string
	 */
	public String getPackageNumberString() {
		return String.format("%05d", packageNumber);
	}

	/**
	 * @return Types of mod
	 */
	public HashSet<Type> getTypes() {
		return types;
	}

	/**
	 * @return Compatible platforms
	 */
	public ECompatiblePlatform getPlatform() {
		return platform;
	}

	/**
	 * @return Version of mod
	 */
	public String getVersion() {
		return version;
	}

	/**
	 * @return Creator of mod
	 */
	public String getCreator() {
		return creator;
	}

	/**
	 * @return Installation type of BSL files
	 */
	public EBSLInstallType getBSLInstallType() {
		return bslInstallType;
	}

	/**
	 * @return Description of mod
	 */
	public String getDescription() {
		return description;
	}

	/**
	 * @return Size of Zip file on Depot
	 */
	public int getZipSize() {
		return zipSize;
	}

	/**
	 * @return Is a mod that is always installed?
	 */
	public boolean isMandatoryMod() {
		return packageNumber < DepotConfig.getMandatoryLimit();
	}

	/**
	 * @return Get the depot file entry
	 */
	public net.oni2.aeinstaller.backend.depot.model.File getFile() {
		return file;
	}

	@Override
	public String toString() {
		return name;
	}

	/**
	 * @return the incompabitilities
	 */
	public HashSet<Integer> getIncompabitilities() {
		return incompatibilities;
	}

	/**
	 * @return the dependencies
	 */
	public HashSet<Integer> getDependencies() {
		return dependencies;
	}

	/**
	 * @return Is this mod valid on the running platform?
	 */
	public boolean isValidOnPlatform() {
		switch (platform) {
			case BOTH:
				return true;
			case MACOS:
				return (Settings.getPlatform() == Platform.MACOS);
			case WIN:
				return (Settings.getPlatform() == Platform.WIN)
						|| (Settings.getPlatform() == Platform.LINUX);
		}
		return false;
	}

	@Override
	public int compareTo(Mod o) {
		return getPackageNumber() - o.getPackageNumber();
	}
}