using Newtonsoft.Json;
using System;
using System.Collections.Generic;

namespace LineMessaging
{
    public class LineTextMessage : ILineMessage
    {
        [JsonProperty("type")]
        public MessageType Type => MessageType.Text;

        [JsonProperty("text")]
        public string Text { get; set; }
        [JsonProperty("emojis")]
        public List<Emoji> Emojis { get; set; }
        public void AddEmoji(int index, string productId, string emojiId)
        {
            if (Emojis == null) Emojis = new List<Emoji>();
            Emojis.Add(new Emoji()
            {
                Index = index,
                ProductId = productId,
                EmojiId = emojiId
            });
        }
        public void AddEmoji(int indexStart, int indexEnd, string productId, string emojiId)
        {
            if (Emojis == null) Emojis = new List<Emoji>();
            for (int i = indexStart; i < indexEnd; i++)
            {
                Emojis.Add(new Emoji()
                {
                    Index = i,
                    ProductId = productId,
                    EmojiId = emojiId
                });
            }
        }
        public void AddEmoji(string replaceSymbol, string productId, string emojiId)
        {
            if (Emojis == null) Emojis = new List<Emoji>();
            this.Text = this.Text.Replace(replaceSymbol, "|");

            foreach (var i in AllIndexesOf(this.Text, "|"))
            {
                Emojis.Add(new Emoji()
                {
                    Index = i,
                    ProductId = productId,
                    EmojiId = emojiId
                });
            }
            this.Text = this.Text.Replace("|", "$");
        }
        private IEnumerable<int> AllIndexesOf(string str, string searchstring)
        {
            int minIndex = str.IndexOf(searchstring);
            while (minIndex != -1)
            {
                yield return minIndex;
                minIndex = str.IndexOf(searchstring, minIndex + searchstring.Length);
            }
        }
    }
    public class Emoji
    {
        [JsonProperty("index")]
        public int Index { get; set; }

        [JsonProperty("productId")]
        public string ProductId { get; set; }

        [JsonProperty("emojiId")]
        public string EmojiId { get; set; }
    }
}