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//================================================================================
//Copyright (c) 2011, David Yu
//All rights reserved.
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package com.dyuproject.fbsgen.compiler.map;

import com.dyuproject.fbsgen.compiler.FakeMap;
import com.dyuproject.fbsgen.parser.Field;

import java.util.List;

/**
 * Codegen helper for field queries.
 *
 * @author David Yu
 * @created Nov 8, 2012
 */
public final class IsFieldMap extends FakeMap
{
    
    public interface Function
    {
        boolean query(Field f);
    }

    public final Function func;
    
    public IsFieldMap(String name, Function func)
    {
        super(name);
        this.func = func;
    }
    
    public Object get(Object key)
    {
        return key instanceof Field && func.query((Field)key);
    }
    
    public static void addAllTo(List list)
    {
        for (Functions c : Functions.values())
            list.add(c.map);
    }
    
    public enum Functions implements Function
    {
        BOOL_OR_ENUM
        {
            public boolean query(Field f)
            {
                return f.isBoolField() || f.isEnumField();
            }
        },
        
        VALIDATED
        {
            public boolean query(Field f)
            {
                if (f.isRepeated() || f.isMessageField())
                    return false;
                
                return f.isOptional() && (f.getA().isEmpty() || 
                        (f.getA().size() == 1 && f.getAnnotation("Display") != null)) ? 
                                false : true;
            }
        },
        
        SINGLE_VALIDATION
        {
            public boolean query(Field f)
            {
                return f.getA().size() == (f.getAnnotation("Display") == null ? 1 : 2);
            }
        },
        
        WITH_VALIDATION
        {
            public boolean query(Field f)
            {
                if (f.getNumber() < 3 && f.getOwner().getO().containsKey("~entity.kind"))
                    return false;
                
                return f.getA().size() >= (f.getAnnotation("Display") == null ? 1 : 2);
            }
        },
        
        WITH_CLIENT_VALIDATION
        {
            public boolean query(Field f)
            {
                if (f.isRepeated() || Boolean.TRUE.equals(f.getO().get("readonly")))
                    return false;
                
                if (!f.isStringField() && !f.isNumberField())
                    return false;
                
                if (f.getNumber() < 3 && f.getOwner().getO().containsKey("~entity.kind"))
                    return false;
                
                if (f.getA().containsKey("Id") && f instanceof Field.UInt32)
                    return false;
                
                return f.getA().size() >= (f.getAnnotation("Display") == null ? 1 : 2);
            }
        },
        
        BYTES_OR_VALIDATED
        {
            public boolean query(Field f)
            {
                return f.isBytesField() || VALIDATED.query(f);
            }
        }
        
        ;
        
        public final IsFieldMap map;

        private Functions()
        {
            map = new IsFieldMap("is_field_" + name().toLowerCase(), this);
        }
    }
}