APJSON

using System;
using Apolyton.FastJson.Registry;

namespace Apolyton.FastJson.Registry
{
    /// <summary>
    /// Represents the internal property info.
    /// </summary>
    internal struct JsonPropertyInfo
    {
        /// <summary>
        /// Specifies the type of the member.
        /// </summary>
        public Type PropertyOrFieldType;
        
        /// <summary>
        /// Represents the non-nullable value behind the primary type. Normally, a cast of a value to the primary type should be possible.
        /// </summary>
        /// <example>
        /// typeof(Double?) for instance is Nullable{double} with NullableType = typeof(double).
        /// </example>
        public Type NullableType;
        
        /// <summary>
        /// Represents the first item type for generic enumerations and collections (relevant for performance).
        /// </summary>
        public Type GenericItemType;

        /// <summary>
        /// Represents all generic types of the Primary Type.
        /// </summary>
        public Type[] GenericTypes;

        /// <summary>
        /// Specifies the property of field name.
        /// </summary>
        public string PropertyOrFieldName;

        /// <summary>
        /// Specifies the json field name for the given property.
        /// </summary>
        public string JsonFieldName;

        /// <summary>
        /// True, if member type is a dictionary.
        /// </summary>
        public bool IsDictionary;

        /// <summary>
        /// Determines, if member type is value type.
        /// </summary>
        public bool IsValueType;

        /// <summary>
        /// Determines, if the type is a generic type.
        /// </summary>
        public bool IsGenericType;

        /// <summary>
        /// Determines, if the member type is an array.
        /// </summary>
        public bool IsArray;

        /// <summary>
        /// Determines, if the member type is a byte array.
        /// </summary>
        public bool IsByteArray;

        /// <summary>
        /// Detemines, if the member type is a guid.
        /// </summary>
        public bool IsGuid;

        /// <summary>
        /// Determines, if the member type is a data set.
        /// </summary>
        public bool IsDataSet;

        /// <summary>
        /// Determines, if the member type is a data table.
        /// </summary>
        public bool IsDataTable;

        /// <summary>
        /// Determines, if the member type is a hash table.
        /// </summary>
        public bool IsHashtable;

        /// <summary>
        /// Determines, if the member type is an Enum.
        /// </summary>
        public bool IsEnum;

        /// <summary>
        /// Determines, if the member type is a date time.
        /// </summary>
        public bool IsDateTime;

        /// <summary>
        /// Determines, if the member type is an int.
        /// </summary>
        public bool IsInt;

        /// <summary>
        /// Determines, if the member type is a long.
        /// </summary>
        public bool IsLong;

        /// <summary>
        /// Determines, if the member type is a string.
        /// </summary>
        public bool IsString;

        /// <summary>
        /// Determines, if the member type is a bool.
        /// </summary>
        public bool IsBool;

        /// <summary>
        /// Determines, if the member type is a class.
        /// </summary>
        public bool IsClass;

        /// <summary>
        /// Determines, if the member type is a string dictionary.
        /// </summary>
        public bool IsStringDictionary;

        /// <summary>
        /// Represents a fast set function for the property or field.
        /// </summary>
        public GenericSetterHandler Setter;

        /// <summary>
        /// Represents a fast get function for the property or field.
        /// </summary>
        public GenericGetterHandler Getter;
        
        /// <summary>
        /// Determines, if the member type is a custom type.
        /// </summary>
        public bool IsCustomType;

        /// <summary>
        /// Determines, if the member type can be written to.
        /// </summary>
        public bool CanWrite;

        /// <summary>
        /// Specifies the default value of the property. For nullable types it is 'null', for other types determined throught the activator.
        /// </summary>
        public object DefaultValue;

        /// <summary>
        /// Returns a lightweight object, which describes the serialization criteria.
        /// </summary>
        /// <returns></returns>
        internal JsonSerializationInfo ToSerializationInfo()
        {
            JsonSerializationInfo info = new JsonSerializationInfo();
            info.JsonFieldName = JsonFieldName;
            info.MemberName = PropertyOrFieldName;
            info.MemberType = PropertyOrFieldType;

            if (GenericTypes == null)
            {
                info.MemberDisplayType = PropertyOrFieldType.Name;
            }
            else
            {
                info.MemberDisplayType = String.Format("{0}<{1}>", PropertyOrFieldType.Name, GenericTypes[0].Name);
            }

            return info;
        }
    }
}