// 
// Decompiled by Procyon v0.6.0
// 

package com.hypixel.hytale.server.npc.util.expression.compile.ast;

import java.util.List;
import java.util.Objects;
import javax.annotation.Nullable;
import com.hypixel.hytale.server.npc.util.expression.ExecutionContext;
import com.hypixel.hytale.server.npc.util.expression.Scope;
import java.util.function.Function;
import com.hypixel.hytale.server.npc.util.expression.compile.Token;
import javax.annotation.Nonnull;
import com.hypixel.hytale.server.npc.util.expression.ValueType;

public abstract class AST
{
    @Nonnull
    private final ValueType valueType;
    @Nonnull
    private final Token token;
    private final int tokenPosition;
    private AST parent;
    @Nullable
    protected Function<Scope, ExecutionContext.Instruction> codeGen;
    
    public AST(@Nonnull final ValueType valueType, @Nonnull final Token token, final int tokenPosition) {
        Objects.requireNonNull(valueType, "ValueType can't be null");
        Objects.requireNonNull(token, "Token can't be null");
        this.valueType = valueType;
        this.token = token;
        this.tokenPosition = tokenPosition;
        this.codeGen = null;
    }
    
    public AST getParent() {
        return this.parent;
    }
    
    public void setParent(final AST parent) {
        this.parent = parent;
    }
    
    @Nonnull
    public ValueType getValueType() {
        return this.valueType;
    }
    
    @Nonnull
    public Token getToken() {
        return this.token;
    }
    
    public int getTokenPosition() {
        return this.tokenPosition;
    }
    
    @Nullable
    public Function<Scope, ExecutionContext.Instruction> getCodeGen() {
        return this.codeGen;
    }
    
    public abstract boolean isConstant();
    
    public ExecutionContext.Operand asOperand() {
        throw new IllegalStateException("AST: Cannot be returned as operand");
    }
    
    public String getString() {
        throw new IllegalStateException("AST: Cannot return string");
    }
    
    public boolean getBoolean() {
        throw new IllegalStateException("AST: Cannot return boolean");
    }
    
    public double getNumber() {
        throw new IllegalStateException("AST: Cannot return number");
    }
    
    @Nonnull
    public ValueType returnType() {
        return this.getValueType();
    }
    
    public ValueType genCode(@Nonnull final List<ExecutionContext.Instruction> list, final Scope scope) {
        Objects.requireNonNull(this.getCodeGen(), "Missing CodeGen in AST");
        list.add(this.getCodeGen().apply(scope));
        return this.getValueType();
    }
}