/*
 *  Copyright (C) 2010-2014 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.flash.abc.avm2.model.clauses;

import com.jpexs.decompiler.flash.SourceGeneratorLocalData;
import com.jpexs.decompiler.flash.abc.avm2.model.InAVM2Item;
import com.jpexs.decompiler.flash.abc.avm2.model.LocalRegAVM2Item;
import com.jpexs.decompiler.flash.abc.avm2.model.SetTypeAVM2Item;
import com.jpexs.decompiler.flash.abc.avm2.parser.script.AVM2SourceGenerator;
import com.jpexs.decompiler.flash.helpers.GraphTextWriter;
import com.jpexs.decompiler.flash.helpers.LoopWithType;
import com.jpexs.decompiler.flash.helpers.NulWriter;
import com.jpexs.decompiler.graph.Block;
import com.jpexs.decompiler.graph.CompilationException;
import com.jpexs.decompiler.graph.GraphSourceItem;
import com.jpexs.decompiler.graph.GraphTargetItem;
import com.jpexs.decompiler.graph.Loop;
import com.jpexs.decompiler.graph.SourceGenerator;
import com.jpexs.decompiler.graph.TypeItem;
import com.jpexs.decompiler.graph.model.ContinueItem;
import com.jpexs.decompiler.graph.model.LocalData;
import com.jpexs.decompiler.graph.model.LoopItem;
import java.util.ArrayList;
import java.util.List;

public class ForEachInAVM2Item extends LoopItem implements Block {

    public InAVM2Item expression;
    public List<GraphTargetItem> commands;
    private boolean labelUsed;

    @Override
    public List<List<GraphTargetItem>> getSubs() {
        List<List<GraphTargetItem>> ret = new ArrayList<>();
        if (commands != null) {
            ret.add(commands);
        }
        return ret;
    }

    public ForEachInAVM2Item(GraphSourceItem instruction, Loop loop, InAVM2Item expression, List<GraphTargetItem> commands) {
        super(instruction, loop);
        if (!commands.isEmpty()) {
            GraphTargetItem firstAssign = commands.get(0);
            if (firstAssign instanceof SetTypeAVM2Item) {
                if (expression.object instanceof LocalRegAVM2Item) {
                    if (((SetTypeAVM2Item) firstAssign).getValue().getNotCoerced() instanceof LocalRegAVM2Item) {
                        if (((LocalRegAVM2Item) ((SetTypeAVM2Item) firstAssign).getValue().getNotCoerced()).regIndex == ((LocalRegAVM2Item) expression.object).regIndex) {
                            commands.remove(0);
                            expression.object = ((SetTypeAVM2Item) firstAssign).getObject();
                        }
                    }

                }
                //locAssign.
            }
        }
        this.expression = expression;
        this.commands = commands;
    }

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

    @Override
    public GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        if (writer instanceof NulWriter) {
            ((NulWriter) writer).startLoop(loop.id, LoopWithType.LOOP_TYPE_LOOP);
        }
        if (labelUsed) {
            writer.append("loop" + loop.id + ":").newLine();
        }
        writer.append("for each");
        if (writer.getFormatting().spaceBeforeParenthesesForEachParentheses) {
            writer.append(" ");
        }
        writer.append("(");
        expression.toString(writer, localData);
        writer.append(")").startBlock();
        for (GraphTargetItem ti : commands) {
            if (!ti.isEmpty()) {
                ti.toStringSemicoloned(writer, localData).newLine();
            }
        }
        writer.endBlock();
        if (writer instanceof NulWriter) {
            LoopWithType loopOjb = ((NulWriter) writer).endLoop(loop.id);
            labelUsed = loopOjb.used;
        }
        return writer;
    }

    @Override
    public List<ContinueItem> getContinues() {
        List<ContinueItem> ret = new ArrayList<>();
        for (GraphTargetItem ti : commands) {
            if (ti instanceof ContinueItem) {
                ret.add((ContinueItem) ti);
            }
            if (ti instanceof Block) {
                ret.addAll(((Block) ti).getContinues());
            }
        }
        return ret;
    }

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

    @Override
    public GraphTargetItem returnType() {
        return TypeItem.UNBOUNDED;
    }

    @Override
    public List<GraphSourceItem> toSource(SourceGeneratorLocalData localData, SourceGenerator generator) throws CompilationException {
        return ((AVM2SourceGenerator) generator).generate(localData, this);
    }

}
