using System;
using System.Collections.Generic;

using UnityEngine;
using BestHTTP;
using BestHTTP.Statistics;
using BestHTTP.Examples;

/// <summary>
/// A class to describe an Example and store it's metadata.
/// </summary>
public sealed class SampleDescriptor
{
    public bool IsLabel { get; set; }
    public Type Type { get; set; }
    public string DisplayName { get; set; }
    public string Description { get; set; }
    public string CodeBlock { get; set; }

    public bool IsSelected { get; set; }
    public GameObject UnityObject { get; set; }
    public bool IsRunning { get { return UnityObject != null; } }

    public SampleDescriptor(Type type, string displayName, string description, string codeBlock)
    {
        this.Type = type;
        this.DisplayName = displayName;
        this.Description = description;
        this.CodeBlock = codeBlock;
    }

    public void CreateUnityObject()
    {
        if (UnityObject != null)
            return;

        UnityObject = new GameObject(DisplayName);
        UnityObject.AddComponent(Type);

#if UNITY_WEBPLAYER
        if (!string.IsNullOrEmpty(CodeBlock))
            Application.ExternalCall("ShowCodeBlock", CodeBlock);
        else
            Application.ExternalCall("HideCodeBlock");
#endif
    }

    public void DestroyUnityObject()
    {
        if (UnityObject != null)
        {
#if UNITY_WEBPLAYER
            Application.ExternalCall("HideCodeBlock");
#endif

            UnityEngine.Object.Destroy(UnityObject);
            UnityObject = null;
        }
    }
}

public class SampleSelector : MonoBehaviour
{
    public const int statisticsHeight = 160;

    List<SampleDescriptor> Samples = new List<SampleDescriptor>();
    public static SampleDescriptor SelectedSample;

    Vector2 scrollPos;

    void Awake()
    {
        HTTPManager.Logger.Level = BestHTTP.Logger.Loglevels.All;

#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
        BestHTTP.HTTPManager.UseAlternateSSLDefaultValue = true;
#endif

#if UNITY_SAMSUNGTV
        SamsungTV.touchPadMode = SamsungTV.TouchPadMode.Mouse;

        // Create a red 'cursor' to see where we are pointing to
        Texture2D tex = new Texture2D(8, 8, TextureFormat.RGB24, false);
        for (int i = 0; i < tex.width; ++i)
            for (int cv = 0; cv < tex.height; ++cv)
                tex.SetPixel(i, cv, Color.red);
        tex.Apply(false, true);
        Cursor.SetCursor(tex, Vector2.zero, CursorMode.Auto);
#endif

#if UNITY_WEBPLAYER
#if !BESTHTTP_DISABLE_PROXY
        // Set up a global proxy in webplayer builds to breach the Socket Policy Service restriction
        BestHTTP.HTTPManager.Proxy = new BestHTTP.HTTPProxy(new Uri("http://u3assets.cloudapp.net:8888"), null, true);
#endif
#endif
        Samples.Add(new SampleDescriptor(null, "HTTP Samples", string.Empty, string.Empty) { IsLabel = true } );

        Samples.Add(new SampleDescriptor(typeof(TextureDownloadSample), "Texture Download", "With HTTPManager.MaxConnectionPerServer you can control how many requests can be processed per server parallel.\n\nFeatures demoed in this example:\n-Parallel requests to the same server\n-Controlling the parallelization\n-Automatic Caching\n-Create a Texture2D from the downloaded data", CodeBlocks.TextureDownloadSample));
        Samples.Add(new SampleDescriptor(typeof(AssetBundleSample), "AssetBundle Download", "A small example that shows a possible way to download an AssetBundle and load a resource from it.\n\nFeatures demoed in this example:\n-Using HTTPRequest without a Callback\n-Using HTTPRequest in a Coroutine\n-Loading an AssetBundle from the downloaded bytes\n-Automatic Caching", CodeBlocks.AssetBundleSample));
#if !UNITY_WEBGL || UNITY_EDITOR
        Samples.Add(new SampleDescriptor(typeof(LargeFileDownloadSample), "Large File Download", "This example demonstrates how you can download a (large) file and continue the download after the connection is aborted.\n\nFeatures demoed in this example:\n-Setting up a streamed download\n-How to access the downloaded data while the download is in progress\n-Setting the HTTPRequest's StreamFragmentSize to controll the frequency and size of the fragments\n-How to use the SetRangeHeader to continue a previously disconnected download\n-How to disable the local, automatic caching", CodeBlocks.LargeFileDownloadSample));
#endif

#if !BESTHTTP_DISABLE_WEBSOCKET
        Samples.Add(new SampleDescriptor(null, "WebSocket Samples", string.Empty, string.Empty) { IsLabel = true });
        Samples.Add(new SampleDescriptor(typeof(WebSocketSample), "Echo", "A WebSocket demonstration that connects to a WebSocket echo service.\n\nFeatures demoed in this example:\n-Basic usage of the WebSocket class", CodeBlocks.WebSocketSample));
#endif

#if !BESTHTTP_DISABLE_SOCKETIO
        Samples.Add(new SampleDescriptor(null, "Socket.IO Samples", string.Empty, string.Empty) { IsLabel = true });
        Samples.Add(new SampleDescriptor(typeof(SocketIOChatSample), "Chat", "This example uses the Socket.IO implementation to connect to the official Chat demo server(http://chat.socket.io/).\n\nFeatures demoed in this example:\n-Instantiating and setting up a SocketManager to connect to a Socket.IO server\n-Changing SocketOptions property\n-Subscribing to Socket.IO events\n-Sending custom events to the server", CodeBlocks.SocketIOChatSample));
        Samples.Add(new SampleDescriptor(typeof(SocketIOWePlaySample), "WePlay", "This example uses the Socket.IO implementation to connect to the official WePlay demo server(http://weplay.io/).\n\nFeatures demoed in this example:\n-Instantiating and setting up a SocketManager to connect to a Socket.IO server\n-Subscribing to Socket.IO events\n-Receiving binary data\n-How to load a texture from the received binary data\n-How to disable payload decoding for fine tune for some speed\n-Sending custom events to the server", CodeBlocks.SocketIOWePlaySample));
#endif

#if !BESTHTTP_DISABLE_SIGNALR
        Samples.Add(new SampleDescriptor(null, "SignalR Samples", string.Empty, string.Empty) { IsLabel = true });
        Samples.Add(new SampleDescriptor(typeof(SimpleStreamingSample), "Simple Streaming", "A very simple example of a background thread that broadcasts the server time to all connected clients every two seconds.\n\nFeatures demoed in this example:\n-Subscribing and handling non-hub messages", CodeBlocks.SignalR_SimpleStreamingSample));
        Samples.Add(new SampleDescriptor(typeof(ConnectionAPISample), "Connection API", "Demonstrates all features of the lower-level connection API including starting and stopping, sending and receiving messages, and managing groups.\n\nFeatures demoed in this example:\n-Instantiating and setting up a SignalR Connection to connect to a SignalR server\n-Changing the default Json encoder\n-Subscribing to state changes\n-Receiving and handling of non-hub messages\n-Sending non-hub messages\n-Managing groups", CodeBlocks.SignalR_ConnectionAPISample));
        Samples.Add(new SampleDescriptor(typeof(ConnectionStatusSample), "Connection Status", "Demonstrates how to handle the events that are raised when connections connect, reconnect and disconnect from the Hub API.\n\nFeatures demoed in this example:\n-Connecting to a Hub\n-Setting up a Callback for Hub events\n-Handling server-sent method call requests\n-Calling a Hub-method on the server-side\n-Opening and closing the SignalR Connection", CodeBlocks.SignalR_ConnectionStatusSample));
        Samples.Add(new SampleDescriptor(typeof(DemoHubSample), "Demo Hub", "A contrived example that exploits every feature of the Hub API.\n\nFeatures demoed in this example:\n-Creating and using wrapper Hub classes to encapsulate hub functions and events\n-Handling long running server-side functions by handling progress messages\n-Groups\n-Handling server-side functions with return value\n-Handling server-side functions throwing Exceptions\n-Calling server-side functions with complex type parameters\n-Calling server-side functions with array parameters\n-Calling overloaded server-side functions\n-Changing Hub states\n-Receiving and handling hub state changes\n-Calling server-side functions implemented in VB .NET", CodeBlocks.SignalR_DemoHubSample));
#if !UNITY_WEBGL
        Samples.Add(new SampleDescriptor(typeof(AuthenticationSample), "Authentication", "Demonstrates how to use the authorization features of the Hub API to restrict certain Hubs and methods to specific users.\n\nFeatures demoed in this example:\n-Creating and using wrapper Hub classes to encapsulate hub functions and events\n-Create and use a Header-based authenticator to access protected APIs\n-SignalR over HTTPS", CodeBlocks.SignalR_AuthenticationSample));
#endif
#endif

#if !BESTHTTP_DISABLE_CACHING && (!UNITY_WEBGL || UNITY_EDITOR)
        Samples.Add(new SampleDescriptor(null, "Plugin Samples", string.Empty, string.Empty) { IsLabel = true });
        Samples.Add(new SampleDescriptor(typeof(CacheMaintenanceSample), "Cache Maintenance", "With this demo you can see how you can use the HTTPCacheService's BeginMaintainence function to delete too old cached entities and keep the cache size under a specified value.\n\nFeatures demoed in this example:\n-How to set up a HTTPCacheMaintananceParams\n-How to call the BeginMaintainence function", CodeBlocks.CacheMaintenanceSample));
#endif

        SelectedSample = Samples[1];
    }

    void Start()
    {
        GUIHelper.ClientArea = new Rect(0, SampleSelector.statisticsHeight + 5, Screen.width, Screen.height - SampleSelector.statisticsHeight - 50);
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            if (SelectedSample != null && SelectedSample.IsRunning)
                SelectedSample.DestroyUnityObject();
            else
                Application.Quit();
        }

        if (Input.GetKeyDown(KeyCode.KeypadEnter) || Input.GetKeyDown(KeyCode.Return))
        {
            if (SelectedSample != null && !SelectedSample.IsRunning)
                SelectedSample.CreateUnityObject();
        }
    }

    void OnGUI()
    {
        var stats = HTTPManager.GetGeneralStatistics(StatisticsQueryFlags.All);

        // Connection statistics
        GUIHelper.DrawArea(new Rect(0, 0, Screen.width / 3, statisticsHeight), false, () =>
            {
                // Header
                GUIHelper.DrawCenteredText("Connections");

                GUILayout.Space(5);

                GUIHelper.DrawRow("Sum:", stats.Connections.ToString());
                GUIHelper.DrawRow("Active:", stats.ActiveConnections.ToString());
                GUIHelper.DrawRow("Free:", stats.FreeConnections.ToString());
                GUIHelper.DrawRow("Recycled:", stats.RecycledConnections.ToString());
                GUIHelper.DrawRow("Requests in queue:", stats.RequestsInQueue.ToString());
            });

        // Cache statistics
        GUIHelper.DrawArea(new Rect(Screen.width / 3, 0, Screen.width / 3, statisticsHeight), false, () =>
            {
                GUIHelper.DrawCenteredText("Cache");

#if !BESTHTTP_DISABLE_CACHING && (!UNITY_WEBGL || UNITY_EDITOR)
                if (!BestHTTP.Caching.HTTPCacheService.IsSupported)
                {
#endif
                    GUI.color = Color.yellow;
                    GUIHelper.DrawCenteredText("Disabled in WebPlayer, WebGL & Samsung Smart TV Builds!");
                    GUI.color = Color.white;
#if !BESTHTTP_DISABLE_CACHING && (!UNITY_WEBGL || UNITY_EDITOR)
                }
                else
                {
                    GUILayout.Space(5);

                    GUIHelper.DrawRow("Cached entities:", stats.CacheEntityCount.ToString());
                    GUIHelper.DrawRow("Sum Size (bytes): ", stats.CacheSize.ToString("N0"));

                    GUILayout.BeginVertical();

                    GUILayout.FlexibleSpace();
                    if (GUILayout.Button("Clear Cache"))
                        BestHTTP.Caching.HTTPCacheService.BeginClear();

                    GUILayout.EndVertical();
                }
#endif
            });

        // Cookie statistics
        GUIHelper.DrawArea(new Rect((Screen.width / 3) * 2, 0, Screen.width / 3, statisticsHeight), false, () =>
            {
                GUIHelper.DrawCenteredText("Cookies");

#if !BESTHTTP_DISABLE_COOKIES && (!UNITY_WEBGL || UNITY_EDITOR)
                if (!BestHTTP.Cookies.CookieJar.IsSavingSupported)
                {
#endif
                    GUI.color = Color.yellow;
                    GUIHelper.DrawCenteredText("Saving and loading from disk is disabled in WebPlayer, WebGL & Samsung Smart TV Builds!");
                    GUI.color = Color.white;
#if !BESTHTTP_DISABLE_COOKIES && (!UNITY_WEBGL || UNITY_EDITOR)
                }
                else
                {
                    GUILayout.Space(5);

                    GUIHelper.DrawRow("Cookies:", stats.CookieCount.ToString());
                    GUIHelper.DrawRow("Estimated size (bytes):", stats.CookieJarSize.ToString("N0"));

                    GUILayout.BeginVertical();

                    GUILayout.FlexibleSpace();
                    if (GUILayout.Button("Clear Cookies"))
                        BestHTTP.Cookies.CookieJar.Clear();
 
                    GUILayout.EndVertical();
                }
#endif
            });

        if (SelectedSample == null || (SelectedSample != null && !SelectedSample.IsRunning))
        {
            // Draw the list of samples
            GUIHelper.DrawArea(new Rect(0, statisticsHeight + 5, SelectedSample == null ? Screen.width : Screen.width / 3, Screen.height - statisticsHeight - 5), false, () =>
                {
                    scrollPos = GUILayout.BeginScrollView(scrollPos);
                    for (int i = 0; i < Samples.Count; ++i)
                        DrawSample(Samples[i]);
                    GUILayout.EndScrollView();
                });

            if (SelectedSample != null)
                DrawSampleDetails(SelectedSample);
        }
        else if (SelectedSample != null && SelectedSample.IsRunning)
        {
            GUILayout.BeginArea(new Rect(0, Screen.height - 50, Screen.width, 50), string.Empty);
                GUILayout.FlexibleSpace();
                GUILayout.BeginHorizontal();
                    GUILayout.FlexibleSpace();

                    GUILayout.BeginVertical();
                    GUILayout.FlexibleSpace();
                    if (GUILayout.Button("Back", GUILayout.MinWidth(100)))
                        SelectedSample.DestroyUnityObject();
                    GUILayout.FlexibleSpace();
                    GUILayout.EndVertical();

                GUILayout.EndHorizontal();
            GUILayout.EndArea();
        }
    }

    private void DrawSample(SampleDescriptor sample)
    {
        if (sample.IsLabel)
        {
            GUILayout.Space(15);
            GUIHelper.DrawCenteredText(sample.DisplayName);
            GUILayout.Space(5);
        }
        else if (GUILayout.Button(sample.DisplayName))
        {
            sample.IsSelected = true;

            if (SelectedSample != null)
                SelectedSample.IsSelected = false;

            SelectedSample = sample;
        }
    }

    private void DrawSampleDetails(SampleDescriptor sample)
    {
        Rect area = new Rect(Screen.width / 3, statisticsHeight + 5, (Screen.width / 3) * 2, Screen.height - statisticsHeight - 5);
        GUI.Box(area, string.Empty);

        GUILayout.BeginArea(area);
            GUILayout.BeginVertical();
                GUIHelper.DrawCenteredText(sample.DisplayName);
                GUILayout.Space(5);
                GUILayout.Label(sample.Description);
                GUILayout.FlexibleSpace();

                if (GUILayout.Button("Start Sample"))
                    sample.CreateUnityObject();

            GUILayout.EndVertical();
        GUILayout.EndArea();
    }
}