/*
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
 * code is released under a tri EPL/GPL/LGPL license. You can use it,
 * redistribute it and/or modify it under the terms of the:
 *
 * Eclipse Public License version 1.0
 * GNU General Public License version 2
 * GNU Lesser General Public License version 2.1
 */
package com.oracle.truffle.ruby.nodes.core;

import com.oracle.truffle.api.*;
import com.oracle.truffle.api.dsl.*;
import com.oracle.truffle.ruby.runtime.*;
import com.oracle.truffle.ruby.runtime.core.*;

@CoreClass(name = "Symbol")
public abstract class SymbolNodes {

    @CoreMethod(names = {"==", "==="}, minArgs = 1, maxArgs = 1)
    public abstract static class EqualNode extends CoreMethodNode {

        public EqualNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public EqualNode(EqualNode prev) {
            super(prev);
        }

        @Specialization
        public boolean equal(@SuppressWarnings("unused") RubyString a, @SuppressWarnings("unused") NilPlaceholder b) {
            return false;
        }

        @Specialization
        public boolean equal(RubySymbol a, RubySymbol b) {
            return a.toString().equals(b.toString());
        }

        @Specialization
        public boolean equal(RubySymbol a, RubyString b) {
            return a.toString().equals(b.toString());
        }

        @Specialization
        public boolean equal(RubySymbol a, int b) {
            return a.toString().equals(Integer.toString(b));
        }

    }

    @CoreMethod(names = "empty?", maxArgs = 0)
    public abstract static class EmptyNode extends CoreMethodNode {

        public EmptyNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public EmptyNode(EmptyNode prev) {
            super(prev);
        }

        @Specialization
        public boolean empty(RubySymbol symbol) {
            return symbol.toString().isEmpty();
        }

    }

    @CoreMethod(names = "to_proc", maxArgs = 0)
    public abstract static class ToProcNode extends CoreMethodNode {

        public ToProcNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public ToProcNode(ToProcNode prev) {
            super(prev);
        }

        @Specialization
        public RubyProc toProc(RubySymbol symbol) {
            // TODO(CS): this should be doing all kinds of caching
            return symbol.toProc();
        }
    }

    @CoreMethod(names = "to_sym", maxArgs = 0)
    public abstract static class ToSymNode extends CoreMethodNode {

        public ToSymNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public ToSymNode(ToSymNode prev) {
            super(prev);
        }

        @Specialization
        public RubySymbol toSym(RubySymbol symbol) {
            return symbol;
        }

    }

}