/*
 * Copyright (c) 2016, Oracle and/or its affiliates.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.oracle.truffle.llvm.parser.model.functions;

import com.oracle.truffle.llvm.parser.model.attributes.AttributesCodeEntry;
import com.oracle.truffle.llvm.parser.model.attributes.AttributesGroup;
import com.oracle.truffle.llvm.parser.model.symbols.constants.Constant;
import com.oracle.truffle.llvm.parser.model.visitors.ConstantVisitor;
import com.oracle.truffle.llvm.runtime.types.FunctionType;
import com.oracle.truffle.llvm.runtime.types.symbols.LLVMIdentifier;
import com.oracle.truffle.llvm.runtime.types.symbols.ValueSymbol;

public final class FunctionDeclaration implements Constant, ValueSymbol {

    private final FunctionType type;
    private String name;
    private final AttributesCodeEntry paramAttr;

    public FunctionDeclaration(FunctionType type, String name, AttributesCodeEntry paramAttr) {
        this.type = type;
        this.name = name;
        this.paramAttr = paramAttr;
    }

    public FunctionDeclaration(FunctionType type, AttributesCodeEntry paramAttr) {
        this(type, LLVMIdentifier.UNKNOWN, paramAttr);
    }

    public FunctionDeclaration(FunctionType type) {
        this(type, LLVMIdentifier.UNKNOWN, AttributesCodeEntry.EMPTY);
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void setName(String name) {
        this.name = LLVMIdentifier.toGlobalIdentifier(name);
    }

    @Override
    public void accept(ConstantVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public String toString() {
        return "FunctionDeclaration [type=" + type + ", name=" + name + ", paramattr=" + paramAttr + "]";
    }

    @Override
    public FunctionType getType() {
        return type;
    }

    public AttributesGroup getFunctionAttributesGroup() {
        return paramAttr.getFunctionAttributesGroup();
    }

    public AttributesGroup getReturnAttributesGroup() {
        return paramAttr.getReturnAttributesGroup();
    }

    public AttributesGroup getParameterAttributesGroup(int idx) {
        return paramAttr.getParameterAttributesGroup(idx);
    }

    @Override
    public boolean hasName() {
        return name != null;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + ((type == null) ? 0 : type.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        FunctionDeclaration other = (FunctionDeclaration) obj;
        if (name == null) {
            if (other.name != null) {
                return false;
            }
        } else if (!name.equals(other.name)) {
            return false;
        }
        if (type == null) {
            if (other.type != null) {
                return false;
            }
        } else if (!type.equals(other.type)) {
            return false;
        }
        return true;
    }
}