using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Net;

using SdlDotNet;
using SdlDotNet.Core;
using SdlDotNet.Graphics;
using SdlDotNet.Graphics.Sprites;
using SdlDotNet.Input;
using SdlDotNet.Audio;

using Newtonsoft.Json;

namespace ColorCycling
{
    class Scene
    {
        public Window window;
        Bitmap scenebmp;
        SceneList sceneList;
        System.Drawing.Bitmap bmp;
        public bool blend = false;

        Surface sceneSurface;

        int currentScene;
        long sceneStartTicks;
        int updateTimer = 0;

        public Scene(Window w, SceneList s)
        {
            window = w;
            sceneList = s;
            bmp = new System.Drawing.Bitmap(640, 480);
        }

        public void LoadScene(int sceneindex)
        {
            currentScene = sceneindex;

            string str = "";

            if (File.Exists("scenes/" + sceneList.scenes[sceneindex].jsonpath + ".LBM.JSON"))
            {
                str = File.ReadAllText("scenes/" + sceneList.scenes[sceneindex].jsonpath + ".LBM.JSON");
            }
            else
            {
                string response = GetHTTP("http://www.effectgames.com/demos/canvascycle/image.php?file=" + sceneList.scenes[sceneindex].jsonpath);
                str = response.Substring(1, response.Length - 4);
                File.WriteAllText("scenes/" + sceneList.scenes[sceneindex].jsonpath + ".LBM.JSON", str);
            }

            Music m = new Music("audio/" + sceneList.scenes[sceneindex].soundpath + ".ogg");
            m.Play(true);

            JSONBitmap j = JsonConvert.DeserializeObject<JSONBitmap>(str);
            scenebmp = new Bitmap(this, j);

            sceneStartTicks = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;

            scenebmp.render(bmp, false);
            sceneSurface = new Surface(bmp);
        }

        public void NextScene()
        {
            if (currentScene < 34)
            {
                currentScene++;
            }
            else
            {
                currentScene = 0;
            }

            LoadScene(currentScene);
        }

        public void PreviousScene()
        {
            if (currentScene > 0)
            {
                currentScene--;
            }
            else
            {
                currentScene = 34;
            }

            LoadScene(currentScene);
        }

        string GetHTTP(string requeststr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requeststr);
            request.KeepAlive = false;
            request.Method = "GET";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader sr = new StreamReader(response.GetResponseStream());
            return sr.ReadToEnd();
        }

        public void Update()
        {
            updateTimer++;
            if (updateTimer > 2)
            {
                scenebmp.palette.cycle(scenebmp.palette.baseColors, GetTickCount(), 1, blend);
                scenebmp.render(bmp, false);
                Draw();
                updateTimer = 0;
            }
            else
            {

            }
        }

        long GetTickCount()
        {
            long milliseconds = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
            return milliseconds - sceneStartTicks;
        }

        void Draw()
        {
            sceneSurface = new Surface(bmp);
            window.BlitToScreen(sceneSurface);
            sceneSurface.Dispose();
        }
    }
}