using System;
using System.Collections.Generic;
using System.Linq;

namespace DownKyi.Core.Danmaku2Ass
{
    public class Producer
    {
        public Dictionary<string, bool> Config;
        public Dictionary<string, Filter> Filters;
        public List<Danmaku> Danmakus;
        public List<Danmaku> KeepedDanmakus;
        public Dictionary<string, int> FilterDetail;

        public Producer(Dictionary<string, bool> config, List<Danmaku> danmakus)
        {
            Config = config;
            Danmakus = danmakus;
        }

        public void StartHandle()
        {
            LoadFilter();
            ApplyFilter();
        }

        public void LoadFilter()
        {
            Filters = new Dictionary<string, Filter>();
            if (Config["top_filter"])
            {
                Filters.Add("top_filter", new TopFilter());
            }
            if (Config["bottom_filter"])
            {
                Filters.Add("bottom_filter", new BottomFilter());
            }
            if (Config["scroll_filter"])
            {
                Filters.Add("scroll_filter", new ScrollFilter());
            }
            //if (Config["custom_filter"])
            //{
            //    Filters.Add("custom_filter", new CustomFilter());
            //}

        }

        public void ApplyFilter()
        {
            Dictionary<string, int> filterDetail = new Dictionary<string, int>() {
                { "top_filter",0},
                { "bottom_filter",0},
                { "scroll_filter",0},
                //{ "custom_filter",0}
            };

            List<Danmaku> danmakus = Danmakus;
            //string[] orders = { "top_filter", "bottom_filter", "scroll_filter", "custom_filter" };
            string[] orders = { "top_filter", "bottom_filter", "scroll_filter" };
            foreach (var name in orders)
            {
                Filter filter;
                try
                {
                    filter = Filters[name];
                }
                catch (Exception e)
                {
                    Console.WriteLine("ApplyFilter()发生异常: {0}", e);
                    continue;
                }

                int count = danmakus.Count;
                danmakus = filter.DoFilter(danmakus);
                filterDetail[name] = count - danmakus.Count;
            }

            KeepedDanmakus = danmakus;
            FilterDetail = filterDetail;
        }

        public Dictionary<string, int> Report()
        {
            int blockedCount = 0;
            foreach (int count in FilterDetail.Values)
            {
                blockedCount += count;
            }

            int passedCount = KeepedDanmakus.Count;
            int totalCount = blockedCount + passedCount;

            Dictionary<string, int> ret = new Dictionary<string, int>
            {
                { "blocked", blockedCount },
                { "passed", passedCount },
                { "total", totalCount }
            };

            return (Dictionary<string, int>)ret.Concat(FilterDetail);
        }
    }
}