/****************************************************************************
 * Copyright (C) 2016-2018 Maschell
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/
package de.mas.wiiu.jnus;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import de.mas.wiiu.jnus.entities.TMD;
import de.mas.wiiu.jnus.entities.Ticket;
import de.mas.wiiu.jnus.entities.content.Content;
import de.mas.wiiu.jnus.entities.content.ContentFSTInfo;
import de.mas.wiiu.jnus.entities.fst.FST;
import de.mas.wiiu.jnus.entities.fst.FSTEntry;
import de.mas.wiiu.jnus.implementations.NUSDataProvider;
import lombok.Getter;
import lombok.Setter;
import lombok.val;

public class NUSTitle {
    @Getter @Setter private FST FST;
    @Getter @Setter private TMD TMD;
    @Getter @Setter private Ticket ticket;

    @Getter @Setter private boolean skipExistingFiles = true;
    @Getter @Setter private NUSDataProvider dataProvider = null;

    public List<FSTEntry> getAllFSTEntriesFlatByContentID(short ID) {
        return getFSTEntriesFlatByContent(getTMD().getContentByID((int) ID));
    }

    public List<FSTEntry> getFSTEntriesFlatByContentIndex(int index) {
        return getFSTEntriesFlatByContent(getTMD().getContentByIndex(index));
    }

    public List<FSTEntry> getFSTEntriesFlatByContent(Content content) {
        return getFSTEntriesFlatByContents(new ArrayList<Content>(Arrays.asList(content)));
    }

    public List<FSTEntry> getFSTEntriesFlatByContents(List<Content> list) {
        return list.stream().flatMap(c -> c.getEntries().stream()).collect(Collectors.toList());
    }

    public List<FSTEntry> getAllFSTEntriesFlat() {
        return getFSTEntriesFlatByContents(new ArrayList<Content>(getTMD().getAllContents().values()));
    }

    public Stream<FSTEntry> getAllFSTEntriesAsStream() {
        return getAllFSTEntryChildrenAsStream(FST.getRoot());
    }

    public Stream<FSTEntry> getAllFSTEntryChildrenAsStream(FSTEntry cur) {
        return getAllFSTEntryChildrenAsStream(cur, false);
    }

    public Stream<FSTEntry> getAllFSTEntryChildrenAsStream(FSTEntry cur, boolean allowNotInPackage) {
        return cur.getChildren().stream() //
                .filter(e -> allowNotInPackage || !e.isNotInPackage()) //
                .flatMap(e -> {
                    if (!e.isDir()) {
                        return Stream.of(e);
                    }
                    return getAllFSTEntryChildrenAsStream(e, allowNotInPackage);
                });
    }

    public Optional<FSTEntry> getFSTEntryByFullPath(String givenFullPath) {
        String fullPath = givenFullPath.replace("/", File.separator);
        if (!fullPath.startsWith(File.separator)) {
            fullPath = File.separator + fullPath;
        }

        String[] dirs = fullPath.split(Pattern.quote(File.separator));
        if (dirs.length <= 1) {
            return Optional.of(FST.getRoot());
        }
        String dirPath = fullPath.substring(0, fullPath.length() - dirs[dirs.length - 1].length() - 1);

        String path = fullPath;
        return getFileEntryDir(dirPath).flatMap(e -> getAllFSTEntryChildrenAsStream(e).filter(en -> path.equals(en.getFullPath())).findAny());
    }

    public List<FSTEntry> getFSTEntriesByRegEx(String regEx) {
        return getFSTEntriesByRegEx(regEx, FST.getRoot());
    }

    public List<FSTEntry> getFSTEntriesByRegEx(String regEx, FSTEntry entry) {
        return getFSTEntriesByRegEx(regEx, entry, true);
    }

    public List<FSTEntry> getFSTEntriesByRegEx(String regEx, boolean onlyInPackage) {
        return getFSTEntriesByRegEx(regEx, FST.getRoot(), onlyInPackage);
    }

    public List<FSTEntry> getFSTEntriesByRegEx(String regEx, FSTEntry entry, boolean allowNotInPackage) {
        Pattern p = Pattern.compile(regEx);
        return getFSTEntriesByRegExStream(p, entry, allowNotInPackage).collect(Collectors.toList());
    }

    private Stream<FSTEntry> getFSTEntriesByRegExStream(Pattern p, FSTEntry entry, boolean allowNotInPackage) {
        return entry.getChildren().stream()//
                .filter(e -> allowNotInPackage || !e.isNotInPackage()) //
                .flatMap(e -> {
                    if (!e.isDir()) {
                        if (p.matcher(e.getFullPath().replace("/", File.separator)).matches()) {
                            return Stream.of(e);
                        } else {
                            return Stream.empty();
                        }
                    }
                    return getFSTEntriesByRegExStream(p, e, allowNotInPackage);
                });
    }

    public Optional<FSTEntry> getFileEntryDir(String string) {
        return getFileEntryDir(string.replace("/", File.separator), FST.getRoot());
    }

    public Optional<FSTEntry> getFileEntryDir(String string, FSTEntry curEntry) {
        for (val curChild : curEntry.getDirChildren()) {
            if (string.startsWith(curChild.getFullPath())) {
                if (string.equals(curChild.getFullPath())) {
                    return Optional.of(curChild);
                }
                return getFileEntryDir(string, curChild);
            }
        }
        return Optional.empty();
    }

    public void printFiles() {
        getFST().getRoot().printRecursive(0);
    }

    public void printContentFSTInfos() {
        for (Entry<Integer, ContentFSTInfo> e : getFST().getContentFSTInfos().entrySet()) {
            System.out.println(String.format("%08X", e.getKey()) + ": " + e.getValue());
        }
    }

    public void printContentInfos() {
        for (Entry<Integer, Content> e : getTMD().getAllContents().entrySet()) {

            System.out.println(String.format("%08X", e.getKey()) + ": " + e.getValue());
            System.out.println(e.getValue().getContentFSTInfo());
            for (FSTEntry entry : e.getValue().getEntries()) {
                System.out.println(entry.getFullPath() + String.format(" size: %016X", entry.getFileSize())
                        + String.format(" offset: %016X", entry.getFileOffset()) + String.format(" flags: %04X", entry.getFlags()));
            }
            System.out.println("-");
        }
    }

    public void cleanup() throws IOException {
        if (getDataProvider() != null) {
            getDataProvider().cleanup();
        }
    }

    public void printDetailedData() {
        printFiles();
        printContentFSTInfos();
        printContentInfos();

        System.out.println();
    }

    @Override
    public String toString() {
        return "NUSTitle [dataProvider=" + dataProvider + "]";
    }
}