using System.Collections.Generic;
using System;

namespace Gallery
{

        // Class Gallery        Here are informations about the current random stored
    public class Gallery{

        public int GalleryId { get; }

        public List<string> Tags { get; }

        public Gallery(string HttpGalleryString)
        {
            GalleryId = GetGalleryId(HttpGalleryString);
            Tags = GetTags(HttpGalleryString);
        }


        private List<string> GetTags(string HttpGalleryString){

            List<string> Tags = new List<string>();
            string TagsSection = "";
            string Tag = "";
            int LastStartTagName;
            int StartTagName;
            int EndTagName;
            string Pattern1 = "class=\"name\">";
            string Pattern2 = "</span>";

            int IndexOfTags = HttpGalleryString.IndexOf("Tags:");
            int IndexOfArtists = HttpGalleryString.IndexOf("Artists:");
            
            for (int i = IndexOfTags; i < IndexOfArtists; i++){
                TagsSection += HttpGalleryString[i];
            }

            StartTagName = TagsSection.IndexOf(Pattern1) + Pattern1.Length;
            EndTagName = TagsSection.IndexOf(Pattern2, StartTagName);


            do{
                Tag = "";

                for (int i = StartTagName; i < EndTagName; i++){
                    Tag += TagsSection[i];
                }

                Tags.Add(Tag);
                LastStartTagName = StartTagName;
                StartTagName = TagsSection.IndexOf(Pattern1, EndTagName) + Pattern1.Length;
                EndTagName = TagsSection.IndexOf(Pattern2, StartTagName);

            } while (LastStartTagName < StartTagName);

            
            for (int i = 0; i < Tags.Count; i++){
                if (Tags[i].Contains('=')){
                    Tags.Clear();
                    Tags.Add("Haha, kei Tags UmU");
                }
            }
            

            return Tags;
        }


        private int GetGalleryId(string HttpGalleryString){
            string Pattern1 = "#</span>";
            string Pattern2 = "</h3>";
            string GalleryId = "";
            int StartIndex = HttpGalleryString.IndexOf(Pattern1) + Pattern1.Length;
            for (int i =  StartIndex; i < HttpGalleryString.IndexOf(Pattern2, StartIndex); i++){
                GalleryId += HttpGalleryString[i];
            }
            return int.Parse(GalleryId);
        }
        
    }
    
}