using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web;

//https://api.vk.com/method/photos.get?owner_id=-96461400&album_id=230961460

namespace ArkadiaTV.VKapi
{
    public static class VKapi
    {
        public static Album GetAlbum(string link)
        {
            Album photos = null;
            char[] seporators = { '_', '-' };
            string[] parts = link.Split(seporators);
            string responseLink = "https://api.vk.com/method/photos.get?owner_id=-" + parts[1] + "&album_id=" + parts[2];
            var json = new WebClient().DownloadString(responseLink);
            System.IO.StreamWriter file = new System.IO.StreamWriter("c:/Intel/" + parts[2] + ".txt");
            file.WriteLine(json);
            file.Close();
            photos = JsonConvert.DeserializeObject<Album>(json);
            photos.Randomize(10);
            string juson = JsonConvert.SerializeObject(photos);
            System.IO.StreamWriter file2 = new System.IO.StreamWriter("c:/Intel/Col" + parts[2] + ".txt");
            file2.WriteLine(juson);
            file2.Close();
            return null;
        }
    }

    public class Photo
    {
        public int pid { get; set; }
        public int aid { get; set; }
        public int owner_id { get; set; }
        public int user_id { get; set; }
        public string src { get; set; }
        public string src_big { get; set; }
        public string src_small { get; set; }
        public string src_xbig { get; set; }
        public string src_xxbig { get; set; }
        public int width { get; set; }
        public int height { get; set; }
        public string text { get; set; }
        public string target { get; set; }
        public int created { get; set; }
        public bool show { get; set; }
        Photo() {show = false;}
}

    public class Album
    {
        public List<Photo> response { get; set;  }
        public int Count() { if (response != null) return response.Count; return 0; }
        public int ShowCount() {
            int count = 0;
            foreach(Photo current in response) {
                if (current.show == true)
                    ++count;
            }
            return count;
        }
        public void Randomize(int count)
        {
            int[] randArray = new int[count];
            bool catcher = false;
            Random rnd = new Random();
            for (int i = 0; i < count; )
            {
                int buffer = rnd.Next(0, response.Count);
                for(int j = 0; j < i; ++j)
                {
                    if (randArray[j] == buffer)
                        catcher = true;
                }
                if (catcher == false)
                {
                    randArray[i] = buffer;
                    response[buffer].show = true;
                    catcher = false;
                    ++i;
                }
                else
                    catcher = false;
            }
        }
        public string[] getList()
        {
            string[] buffer = new string[this.ShowCount()];
            int current = 0;
            for (int i = 0; i < response.Count; ++i)
            {
                if (response[i].show == true)
                {
                    buffer[current] = response[i].src_xxbig;
                    ++current;
                }
            }
            return null;
        }
    }
}