/*
 *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 */
package com.jpexs.decompiler.graph;

import com.jpexs.decompiler.flash.SourceGeneratorLocalData;
import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
import com.jpexs.decompiler.flash.configuration.Configuration;
import com.jpexs.decompiler.flash.ecma.EcmaScript;
import com.jpexs.decompiler.flash.helpers.GraphTextWriter;
import com.jpexs.decompiler.flash.helpers.HighlightedTextWriter;
import com.jpexs.decompiler.flash.helpers.hilight.HighlightData;
import com.jpexs.decompiler.graph.model.BinaryOp;
import com.jpexs.decompiler.graph.model.LocalData;
import com.jpexs.decompiler.graph.model.NotItem;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 *
 * @author JPEXS
 */
public abstract class GraphTargetItem implements Serializable, Cloneable {

    public static final int PRECEDENCE_PRIMARY = 0;

    public static final int PRECEDENCE_POSTFIX = 1;

    public static final int PRECEDENCE_UNARY = 2;

    public static final int PRECEDENCE_MULTIPLICATIVE = 3;

    public static final int PRECEDENCE_ADDITIVE = 4;

    public static final int PRECEDENCE_BITWISESHIFT = 5;

    public static final int PRECEDENCE_RELATIONAL = 6;

    public static final int PRECEDENCE_EQUALITY = 7;

    public static final int PRECEDENCE_BITWISEAND = 8;

    public static final int PRECEDENCE_BITWISEXOR = 9;

    public static final int PRECEDENCE_BITWISEOR = 10;

    public static final int PRECEDENCE_LOGICALAND = 11;

    public static final int PRECEDENCE_LOGICALOR = 12;

    public static final int PRECEDENCE_CONDITIONAL = 13;

    public static final int PRECEDENCE_ASSIGMENT = 14;

    public static final int PRECEDENCE_COMMA = 15;

    public static final int NOPRECEDENCE = 16;

    private GraphSourceItem src;

    protected int precedence;

    private List<GraphSourceItemPos> moreSrc;

    public GraphPart firstPart;

    public GraphTargetItem value;

    private HighlightData srcData;

    public GraphSourceItem lineStartItem;

    public GraphSourceItem getLineStartItem() {
        return lineStartItem;
    }

    public int getLine() {
        if (src != null) {
            return src.getLine();
        }
        return 0;
    }

    public String getFile() {
        if (src != null) {
            return src.getFile();
        }
        return null;
    }

    public GraphPart getFirstPart() {
        if (value == null) {
            return firstPart;
        }
        GraphPart ret = value.getFirstPart();
        if (ret == null) {
            return firstPart;
        }
        return ret;
    }

    public GraphTargetItem() {
        this(null, null, NOPRECEDENCE);
    }

    public GraphTargetItem(GraphSourceItem src, GraphSourceItem lineStartItem, int precedence) {
        this(src, lineStartItem, precedence, null);
    }

    public GraphTargetItem(GraphSourceItem src, GraphSourceItem lineStartItem, int precedence, GraphTargetItem value) {
        this.src = src;
        this.lineStartItem = lineStartItem;
        this.precedence = precedence;
        this.value = value;
    }

    public GraphSourceItem getSrc() {
        return src;
    }

    public List<GraphSourceItemPos> getMoreSrc() {
        if (moreSrc == null) {
            moreSrc = new ArrayList<>();
        }

        return moreSrc;
    }

    protected HighlightData getSrcData() {
        if (srcData == null) {
            srcData = new HighlightData();
        }

        return srcData;
    }

    protected int getPos() {
        return 0;
    }

    public List<GraphSourceItemPos> getNeededSources() {
        List<GraphSourceItemPos> ret = new ArrayList<>();
        ret.add(new GraphSourceItemPos(src, getPos()));
        if (moreSrc != null) {
            ret.addAll(moreSrc);
        }

        if (value != null) {
            ret.addAll(value.getNeededSources());
        }

        return ret;
    }

    public GraphTextWriter toStringSemicoloned(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        if (Thread.currentThread().isInterrupted()) {
            throw new InterruptedException();
        }

        writer.startOffset(src, getLineStartItem(), getPos(), srcData);
        appendTo(writer, localData);
        if (needsSemicolon()) {
            writer.appendNoHilight(";");
        }
        writer.endOffset();
        return writer;
    }

    public boolean needsSemicolon() {
        return true;
    }

    @Override
    public String toString() {
        return getClass().getName();
    }

    public GraphTextWriter toString(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        if (Thread.currentThread().isInterrupted()) {
            throw new InterruptedException();
        }

        writer.startOffset(src, getLineStartItem(), getPos(), srcData);
        appendTo(writer, localData);
        writer.endOffset();
        return writer;
    }

    public abstract GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) throws InterruptedException;

    public String toString(LocalData localData) throws InterruptedException {
        HighlightedTextWriter writer = new HighlightedTextWriter(Configuration.getCodeFormatting(), false);
        toString(writer, localData);
        return writer.toString();
    }

    public int getPrecedence() {
        return precedence;
    }

    public boolean isCompileTime() {
        Set<GraphTargetItem> dependencies = new HashSet<>();
        dependencies.add(this);
        return isCompileTime(dependencies);
    }

    public boolean isCompileTime(Set<GraphTargetItem> dependencies) {
        return false;
    }

    public boolean hasSideEffect() {
        return false;
    }

    public boolean isVariableComputed() {
        return false;
    }

    public Object getResult() {
        return null;
    }

    public Double getResultAsNumber() {
        return EcmaScript.toNumberAs2(getResult());
    }

    public String toStringNoQuotes(LocalData localData) {
        // todo: honfika: this method should not be called, maybe we should throw an exception
        return toString();
    }

    public GraphTextWriter toStringNoQuotes(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        writer.startOffset(src, getLineStartItem(), getPos(), srcData);
        appendToNoQuotes(writer, localData);
        writer.endOffset();
        return writer;
    }

    public GraphTextWriter appendToNoQuotes(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        return toString(writer, localData);
    }

    public GraphTargetItem getNotCoerced() {
        return this;
    }

    public GraphTargetItem getNotCoercedNoDup() {
        return getNotCoerced();
    }

    public GraphTargetItem getThroughRegister() {
        return this;
    }

    public boolean needsNewLine() {
        return false;
    }

    public GraphTextWriter toStringNL(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        writer.startOffset(src, getLineStartItem(), getPos(), srcData);
        appendTo(writer, localData);
        if (needsNewLine()) {
            writer.newLine();
        }
        writer.endOffset();
        return writer;
    }

    public boolean isEmpty() {
        return false;
    }

    public GraphTargetItem getThroughNotCompilable() {
        return this;
    }

    public GraphTargetItem getThroughDuplicate() {
        return this;
    }

    public boolean valueEquals(GraphTargetItem target) {
        return equals(target);
    }

    public List<GraphSourceItem> toSource(SourceGeneratorLocalData localData, SourceGenerator generator) throws CompilationException {
        return new ArrayList<>();
    }

    public List<GraphSourceItem> toSourceIgnoreReturnValue(SourceGeneratorLocalData localData, SourceGenerator generator) throws CompilationException {
        if (!hasReturnValue()) {
            return toSource(localData, generator);
        }
        return generator.generateDiscardValue(localData, this);
    }

    protected List<GraphSourceItem> toSourceBinary(BinaryOp op, GraphSourceItem action) {
        List<GraphSourceItem> ret = new ArrayList<>();

        return ret;
    }

    public static List<GraphSourceItem> toSourceMerge(SourceGeneratorLocalData localData, SourceGenerator gen, Object... tar) throws CompilationException {
        List<GraphSourceItem> ret = new ArrayList<>();
        for (Object o : tar) {
            if (o == null) {
                continue;
            }
            if (o instanceof GraphTargetItem) {
                ret.addAll(((GraphTargetItem) o).toSource(localData, gen));
            }
            if (o instanceof GraphSourceItem) {
                ret.add((GraphSourceItem) o);
            }
            if (o instanceof List) {
                List l = (List) o;
                for (Object o2 : l) {
                    if (o2 instanceof GraphSourceItem) {
                        ret.add((GraphSourceItem) o2);
                    }
                    if (o2 instanceof GraphTargetItem) {
                        ret.addAll(((GraphTargetItem) o2).toSource(localData, gen));
                    }
                }
            }
        }
        return ret;
    }

    public abstract boolean hasReturnValue();

    public List<GraphTargetItem> getAllSubItems() {
        List<GraphTargetItem> ret = new ArrayList<>();
        if (value != null) {
            ret.add(value);
        }
        return ret;
    }

    public abstract GraphTargetItem returnType();

    @Override
    protected GraphTargetItem clone() {
        try {
            return (GraphTargetItem) super.clone();
        } catch (CloneNotSupportedException ex) {
            return null;
        }
    }

    public GraphTargetItem invert(GraphSourceItem src) {
        return new NotItem(src, getLineStartItem(), this);
    }

    public GraphTextWriter appendBlock(GraphTargetItem prevLineItem, GraphTextWriter writer, LocalData localData, List<GraphTargetItem> commands) throws InterruptedException {

        //This may be useful in the future, but we must handle obfuscated SWFs where there is only one debugline instruction on the beggining.
        final boolean useLineInfo = false;

        int prevLine = prevLineItem == null ? 0 : prevLineItem.getLine();
        writer.startBlock();
        boolean first = true;
        for (GraphTargetItem ti : commands) {
            if (!ti.isEmpty()) {
                //Use stored line information if available to place commands on same line
                if (!first && (!useLineInfo || (ti.getLine() < 1 || prevLine < 1 || (prevLine >= 1 && prevLine != ti.getLine())))) {
                    writer.newLine();
                }
                prevLine = ti.getLine();
                first = false;
                ti.toStringSemicoloned(writer, localData);
            }
        }
        if (!first) {
            writer.newLine();
        }
        writer.endBlock();
        return writer;
    }

    public long getAsLong() {
        if (this instanceof DirectValueActionItem) {
            DirectValueActionItem dvai = (DirectValueActionItem) this;
            return (long) (double) EcmaScript.toNumberAs2(dvai.value);
        }

        return 0;
    }
}