/*
 * Copyright 2010 Jon S Akhtar (Sylvanaar)
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

package com.sylvanaar.idea.Lua.lang.psi.impl.expressions;

import com.intellij.lang.ASTNode;
import com.intellij.psi.PsiElementVisitor;
import com.intellij.psi.tree.IElementType;
import com.sylvanaar.idea.Lua.lang.parser.LuaElementTypes;
import com.sylvanaar.idea.Lua.lang.psi.LuaPsiElement;
import com.sylvanaar.idea.Lua.lang.psi.expressions.LuaBinaryExpression;
import com.sylvanaar.idea.Lua.lang.psi.expressions.LuaExpression;
import com.sylvanaar.idea.Lua.lang.psi.visitor.LuaElementVisitor;
import org.jetbrains.annotations.NotNull;

import static com.sylvanaar.idea.Lua.lang.lexer.LuaTokenTypes.BINARY_OP_SET;

/**
 * Created by IntelliJ IDEA.
 * User: Jon S Akhtar
 * Date: Jun 12, 2010
 * Time: 11:37:52 PM
 */
public class LuaBinaryExpressionImpl extends LuaExpressionImpl implements LuaBinaryExpression {
    public LuaBinaryExpressionImpl(ASTNode node) {
        super(node);
    }

    @Override
    public LuaPsiElement getOperator() {
        return (LuaPsiElement) findChildByType(LuaElementTypes.BINARY_OP);
    }

    @Override
    public String toString() {
        try {
        return super.toString() + " ("  + getLeftExpression().getText() + ") " + getOperator().getText() + " (" + getRightExpression().getText() +  ")";
        } catch (Throwable unused) {}

        return "err";
    }

    @Override
    public LuaExpression getLeftExpression() {
        LuaExpression[] e = findChildrenByClass(LuaExpression.class);
        return  e.length>0?e[0]:null;
    }

    @Override
    public IElementType getOperationTokenType() {
        ASTNode child = getOperator().getNode().findChildByType(BINARY_OP_SET);
        return child!=null ? child.getElementType() : null;
    }
//
//    @Override
//    public Object evaluate() {
//        final LuaExpression leftExpression = getLeftExpression();
//        Object left = leftExpression.evaluate();
//        if (left == null) return null;
//        LuaType leftType = leftExpression.getLuaType();
//
//        final LuaExpression rightExpression = getRightExpression();
//        Object right = rightExpression.evaluate();
//        if (right == null) return null;
//        LuaType rightType = rightExpression.getLuaType();
//
//        final IElementType op = getOperationTokenType();
//        if (op == CONCAT && leftType == LuaType.STRING && (rightType == LuaType.STRING || rightType == LuaType.NUMBER))
//            return left.toString() + right.toString();
//
////        if (op == PLUS)
////            return Double.valueOf(left) + Double.valueOf(right);
//
//        return null;
//    }

    @Override
    public LuaExpression getLeftOperand() {
        return getLeftExpression();
    }

    @Override
    public LuaExpression getRightOperand() {
        return getRightExpression();
    }

    @Override
    public LuaExpression getRightExpression() {
        LuaExpression[] e = findChildrenByClass(LuaExpression.class);
        return  e.length>1?e[1]:null;
    }
        @Override
    public void accept(LuaElementVisitor visitor) {
        visitor.visitBinaryExpression(this);
    }

    @Override
    public void accept(@NotNull PsiElementVisitor visitor) {
        if (visitor instanceof LuaElementVisitor) {
            ((LuaElementVisitor) visitor).visitBinaryExpression(this);
        } else {
            visitor.visitElement(this);
        }
    }
}

@@ -812,24 +812,81 @@
 ementType;%0D%0A
+import com.sylvanaar.idea.Lua.lang.lexer.LuaTokenTypes;%0D%0A
 import com.s
@@ -1120,32 +1120,87 @@
 LuaExpression;%0D%0A
+import com.sylvanaar.idea.Lua.lang.psi.types.LuaType;%0D%0A
 import com.sylva
@@ -2491,16 +2491,229 @@
 %0A    %7D%0D%0A
+%0D%0A    @NotNull%0D%0A    @Override%0D%0A    public LuaType getLuaType() %7B%0D%0A        if (getOperationTokenType() == LuaTokenTypes.CONCAT)%0D%0A            return LuaType.STRING;%0D%0A        return super.getLuaType();%0D%0A    %7D%0D%0A%0D%0A    
 //%0D%0A//  

result of concat operation is string