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using System;
using Microsoft.Build.Framework;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VsSDK.UnitTestLibrary;
using IOleServiceProvider = Microsoft.VisualStudio.OLE.Interop.IServiceProvider;

namespace Microsoft.VisualStudio.Project.UnitTests
{
    internal static class MockFactories
    {
        private static GenericMockFactory hierarchyFactory;
        public static GenericMockFactory HierarchyFactory
        {
            get
            {
                if(null == hierarchyFactory)
                {
                    hierarchyFactory = new GenericMockFactory("EmptyMockHierarchy", new Type[] { typeof(IVsHierarchy) });
                }
                return hierarchyFactory;
            }
        }

        public static IVsHierarchy HierarchyForLogger(IOleServiceProvider provider)
        {
            BaseMock mock = HierarchyFactory.GetInstance();
            mock.AddMethodReturnValues(
                string.Format("{0}.{1}", typeof(IVsHierarchy).FullName, "GetSite"),
                new object[] { 0, provider });

            return mock as IVsHierarchy;
        }

        private static GenericMockFactory outputWindowPaneFactory;
        public static GenericMockFactory OutputWindowPaneFactory
        {
            get
            {
                if(null == outputWindowPaneFactory)
                {
                    outputWindowPaneFactory = new GenericMockFactory("EmptyMockIVsOutputWindowPane", new Type[] { typeof(IVsOutputWindowPane) });
                }
                return outputWindowPaneFactory;
            }
        }

        private static void OutputStringCallback(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            System.Text.StringBuilder builder = (System.Text.StringBuilder)mock["StringBuilder"];
            string text = (string)args.GetParameter(0);
            builder.Append(text);
            args.ReturnValue = 0;
        }
        private static void ClearOutputCallback(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            System.Text.StringBuilder builder = (System.Text.StringBuilder)mock["StringBuilder"];
            builder.Length = 0;
            args.ReturnValue = 0;
        }
        public static IVsOutputWindowPane OutputPaneWithStringFunctions()
        {
            BaseMock mock = OutputWindowPaneFactory.GetInstance();
            mock["StringBuilder"] = new System.Text.StringBuilder();
            mock.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IVsOutputWindowPane).FullName, "OutputString"),
                new EventHandler<CallbackArgs>(OutputStringCallback));
            mock.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IVsOutputWindowPane).FullName, "OutputStringThreadSafe"),
                new EventHandler<CallbackArgs>(OutputStringCallback));
            mock.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IVsOutputWindowPane).FullName, "Clear"),
                new EventHandler<CallbackArgs>(ClearOutputCallback));

            return mock as IVsOutputWindowPane;
        }

        private static GenericMockFactory eventSourceFactory;
        public static GenericMockFactory MSBuildEventSourceFactory
        {
            get
            {
                if(null == eventSourceFactory)
                {
                    eventSourceFactory = new GenericMockFactory("EmptyMockIEventSource", new Type[] { typeof(IEventSource) });
                }
                return eventSourceFactory;
            }
        }

        #region Default callback functions for the event source.
        private static void EventSourceAddMessageRaised(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            mock["MessageRaised"] = args.GetParameter(0);
        }
        private static void EventSourceAddBuildStarted(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            mock["BuildStarted"] = args.GetParameter(0);
        }
        private static void EventSourceAddBuildFinished(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            mock["BuildFinished"] = args.GetParameter(0);
        }
        private static void EventSourceAddTaskStarted(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            mock["TaskStarted"] = args.GetParameter(0);
        }
        private static void EventSourceAddTaskFinished(object sender, CallbackArgs args)
        {
            BaseMock mock = (BaseMock)sender;
            mock["TaskFinished"] = args.GetParameter(0);
        }
        #endregion

        public static BaseMock CreateMSBuildEventSource()
        {
            BaseMock mockSource = MSBuildEventSourceFactory.GetInstance();
            mockSource.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IEventSource).FullName, "add_MessageRaised"),
                new EventHandler<CallbackArgs>(EventSourceAddMessageRaised));
            mockSource.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IEventSource).FullName, "add_BuildFinished"),
                new EventHandler<CallbackArgs>(EventSourceAddBuildFinished));
            mockSource.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IEventSource).FullName, "add_BuildStarted"),
                new EventHandler<CallbackArgs>(EventSourceAddBuildStarted));
            mockSource.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IEventSource).FullName, "add_TaskStarted"),
                new EventHandler<CallbackArgs>(EventSourceAddTaskStarted));
            mockSource.AddMethodCallback(
                string.Format("{0}.{1}", typeof(IEventSource).FullName, "add_TaskFinished"),
                new EventHandler<CallbackArgs>(EventSourceAddTaskFinished));

            return mockSource;
        }
    }
}