//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2015 Jb Evain
// Copyright (c) 2008 - 2011 Novell, Inc.
//
// Licensed under the MIT/X11 license.
//

using System;

namespace MonoFN.Cecil
{
    public abstract class MemberReference : IMetadataTokenProvider
    {
        private string name;
        private TypeReference declaring_type;
        internal MetadataToken token;
        internal object projection;
        public virtual string Name
        {
            get { return name; }
            set
            {
                if (IsWindowsRuntimeProjection && value != name)
                    throw new InvalidOperationException();

                name = value;
            }
        }
        public abstract string FullName { get; }
        public virtual TypeReference DeclaringType
        {
            get { return declaring_type; }
            set { declaring_type = value; }
        }
        public MetadataToken MetadataToken
        {
            get { return token; }
            set { token = value; }
        }
        public bool IsWindowsRuntimeProjection
        {
            get { return projection != null; }
        }
        internal bool HasImage
        {
            get
            {
                ModuleDefinition module = Module;
                if (module == null)
                    return false;

                return module.HasImage;
            }
        }
        public virtual ModuleDefinition Module
        {
            get { return declaring_type != null ? declaring_type.Module : null; }
        }
        public virtual bool IsDefinition
        {
            get { return false; }
        }
        public virtual bool ContainsGenericParameter
        {
            get { return declaring_type != null && declaring_type.ContainsGenericParameter; }
        }
        internal MemberReference() { }

        internal MemberReference(string name)
        {
            this.name = name ?? string.Empty;
        }

        internal string MemberFullName()
        {
            if (declaring_type == null)
                return name;

            return declaring_type.FullName + "::" + name;
        }

        public IMemberDefinition Resolve()
        {
            return ResolveDefinition();
        }

        protected abstract IMemberDefinition ResolveDefinition();

        public override string ToString()
        {
            return FullName;
        }
    }
}