#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

namespace LC.Newtonsoft.Json.Serialization
{
    /// <summary>
    /// A base class for resolving how property names and dictionary keys are serialized.
    /// </summary>
    public abstract class NamingStrategy
    {
        /// <summary>
        /// A flag indicating whether dictionary keys should be processed.
        /// Defaults to <c>false</c>.
        /// </summary>
        public bool ProcessDictionaryKeys { get; set; }

        /// <summary>
        /// A flag indicating whether extension data names should be processed.
        /// Defaults to <c>false</c>.
        /// </summary>
        public bool ProcessExtensionDataNames { get; set; }

        /// <summary>
        /// A flag indicating whether explicitly specified property names,
        /// e.g. a property name customized with a <see cref="JsonPropertyAttribute"/>, should be processed.
        /// Defaults to <c>false</c>.
        /// </summary>
        public bool OverrideSpecifiedNames { get; set; }

        /// <summary>
        /// Gets the serialized name for a given property name.
        /// </summary>
        /// <param name="name">The initial property name.</param>
        /// <param name="hasSpecifiedName">A flag indicating whether the property has had a name explicitly specified.</param>
        /// <returns>The serialized property name.</returns>
        public virtual string GetPropertyName(string name, bool hasSpecifiedName)
        {
            if (hasSpecifiedName && !OverrideSpecifiedNames)
            {
                return name;
            }

            return ResolvePropertyName(name);
        }

        /// <summary>
        /// Gets the serialized name for a given extension data name.
        /// </summary>
        /// <param name="name">The initial extension data name.</param>
        /// <returns>The serialized extension data name.</returns>
        public virtual string GetExtensionDataName(string name)
        {
            if (!ProcessExtensionDataNames)
            {
                return name;
            }

            return ResolvePropertyName(name);
        }

        /// <summary>
        /// Gets the serialized key for a given dictionary key.
        /// </summary>
        /// <param name="key">The initial dictionary key.</param>
        /// <returns>The serialized dictionary key.</returns>
        public virtual string GetDictionaryKey(string key)
        {
            if (!ProcessDictionaryKeys)
            {
                return key;
            }

            return ResolvePropertyName(key);
        }

        /// <summary>
        /// Resolves the specified property name.
        /// </summary>
        /// <param name="name">The property name to resolve.</param>
        /// <returns>The resolved property name.</returns>
        protected abstract string ResolvePropertyName(string name);

        /// <summary>
        /// Hash code calculation
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            unchecked
            {
                var hashCode = GetType().GetHashCode();     // make sure different types do not result in equal values
                hashCode = (hashCode * 397) ^ ProcessDictionaryKeys.GetHashCode();
                hashCode = (hashCode * 397) ^ ProcessExtensionDataNames.GetHashCode();
                hashCode = (hashCode * 397) ^ OverrideSpecifiedNames.GetHashCode();
                return hashCode;
            }
        }

        /// <summary>
        /// Object equality implementation
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public override bool Equals(object obj) => Equals(obj as NamingStrategy);

        /// <summary>
        /// Compare to another NamingStrategy
        /// </summary>
        /// <param name="other"></param>
        /// <returns></returns>
        protected bool Equals(NamingStrategy other)
        {
            if (other == null)
            {
                return false;
            }

            return GetType() == other.GetType() &&
                ProcessDictionaryKeys == other.ProcessDictionaryKeys &&
                ProcessExtensionDataNames == other.ProcessExtensionDataNames &&
                OverrideSpecifiedNames == other.OverrideSpecifiedNames;
        }
    }
}