// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
// 
// 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.

using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using SharpGen.Config;
using SharpGen.CppModel;

namespace SharpGen.Model
{
    public class CsInterface : CsTypeBase
    {
        private CsBaseItemListCache<CsMethod> methods;
        private string shadowName;
        private string vtblName;

        public CsInterface(CppInterface cppInterface, string name) : base(cppInterface, name)
        {
            if (cppInterface == null)
                return;

            var tag = cppInterface.Rule;
            IsCallback = tag.IsCallbackInterface ?? IsCallback;
            IsDualCallback = tag.IsDualCallbackInterface ?? IsDualCallback;
            AutoGenerateShadow = tag.AutoGenerateShadow ?? AutoGenerateShadow;
            AutoGenerateVtbl = tag.AutoGenerateVtbl ?? AutoGenerateVtbl;
            StaticShadowVtbl = tag.StaticShadowVtbl ?? StaticShadowVtbl;
            ShadowVisibility = tag.ShadowVisibility ?? ShadowVisibility;
            VtblVisibility = tag.VtblVisibility ?? VtblVisibility;

            if (tag.ShadowName != null)
                ShadowName = tag.ShadowName;
            if (tag.VtblName != null)
                VtblName = tag.VtblName;

            Guid = FindGuid(cppInterface);
        }

        private static string FindGuid(CppInterface cppInterface)
        {
            if (!string.IsNullOrEmpty(cppInterface.Guid))
                return cppInterface.Guid;

            // If Guid is null we try to recover it from a declared GUID

            var finder = new CppElementFinder(cppInterface.ParentInclude);

            var cppGuid = finder.Find<CppGuid>("IID_" + cppInterface.Name).FirstOrDefault();

            return cppGuid != null
                       ? cppGuid.Guid.ToString()
                       : cppInterface.Guid;
        }

        public IEnumerable<CsMethod> Methods => methods.Enumerate(this);
        public IReadOnlyList<CsMethod> MethodList => methods.GetList(this);

        public IEnumerable<CsProperty> Properties => Items.OfType<CsProperty>();

        public IEnumerable<CsVariable> Variables => Items.OfType<CsVariable>();

        /// <summary>
        /// Gets or sets the <see cref="Visibility"/> of the Shadow of this interface.
        /// Default is empty, if no <c>partial</c> part is present it will be <c>internal</c> (top-level type).
        /// </summary>
        public Visibility? ShadowVisibility { get; }

        /// <summary>
        /// Gets or sets the <see cref="Visibility"/> of the Vtbl of this interface.
        /// Default is <c>protected internal</c>.
        /// </summary>
        public Visibility? VtblVisibility { get; }

        /// <summary>
        /// Class Parent inheritance
        /// </summary>
        public CsInterface Base { get; set; }

        /// <summary>
        /// Interface Parent inheritance
        /// </summary>
        public CsInterface IBase { get; set; }

        public CsInterface NativeImplementation { get; set; }

        public string Guid { get; }

        /// <summary>
        ///   Only valid for inner interface. Specify the name of the property in the outer interface to access to the inner interface
        /// </summary>
        public string PropertyAccessName { get; set; }

        /// <summary>
        ///   True if this interface is used as a callback to a C# object
        /// </summary>
        public bool IsCallback { get; set; }

        /// <summary>
        ///   True if this interface is used as a dual-callback to a C# object
        /// </summary>
        public bool IsDualCallback { get; set; }

        public string ShadowName
        {
            get => shadowName ?? DefaultShadowFullName;
            set => shadowName = value;
        }

        public string VtblName
        {
            get => vtblName ?? DefaultVtblFullName;
            set => vtblName = value;
        }

        private string DefaultShadowFullName => $"{QualifiedName}Shadow";
        private string DefaultVtblFullName => $"{ShadowName}.{Name}Vtbl";

        public bool AutoGenerateShadow { get; } = true;
        public bool AutoGenerateVtbl { get; } = true;
        public bool StaticShadowVtbl { get; } = true;

        public bool HasInnerInterfaces => InnerInterfaces.Any();

        [ExcludeFromCodeCoverage]
        public override string ToString()
        {
            return string.Format(
                CultureInfo.InvariantCulture, "csinterface {0} => {1}",
                CppElementName, QualifiedName
            );
        }

        public IEnumerable<CsInterface> InnerInterfaces => Items.OfType<CsInterface>();

        public bool IsFullyMapped { get; set; } = true;

        private protected override IEnumerable<IExpiring> ExpiringOnItemsChange
        {
            get
            {
                yield return methods.Expiring;
            }
        }
    }
}