using BitgetAPI.Data;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static BitgetAPI.CommonProperty;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.ToolTip;

namespace BitgetApi.IndicatorConditionSetup
{
    public class SMABandConditionSetup
    {
        private readonly int rangeLookback = 10;
        private readonly double rangeThresholdPercent = 1.0;
        private readonly int bandLength = 12;
        private readonly int recentTouchLookback = 5;        
        private int? sma4LongTouchBar = null;
        private int? sma4ShortTouchBar = null;

        public bool Calculate(List<CandleData> candles, SMABandType type)
        {
            var currentIndex = candles.Count - 1;
            var close = candles.Select(t => t.Close).ToList();
            var high = candles.Select(t=>t.High).ToList();
            var low = candles.Select(t => t.Low).ToList();

            if (currentIndex < 72 || close.Count <= currentIndex || high.Count <= currentIndex || low.Count <= currentIndex)
                return false;

            // === SMA(4) 계산 ===
            double sma4 = close.GetRange(currentIndex - 3, 4).Average();
            double prevSma4 = new[] { close[currentIndex - 4], close[currentIndex - 1], close[currentIndex - 2], close[currentIndex - 3] }.Average();
            double prev2Sma4 = new[] { close[currentIndex - 4], close[currentIndex - 5], close[currentIndex - 2], close[currentIndex - 3] }.Average();

            // === SMA(4) 밴드 계산 ===
            List<double> sma4Series = new List<double>();
            for (int i = currentIndex - bandLength + 1; i <= currentIndex; i++)
            {
                var s = close.GetRange(i - 3, 4).Average();
                sma4Series.Add(s);
            }
            double sma4High = sma4Series.Max();
            double sma4Low = sma4Series.Min();
            double sma4Middle = sma4Series.Average();

            // 이전 SMA4 밴드
            List<double> prevSma4Series = new List<double>();
            for (int i = currentIndex - bandLength + 1; i <= currentIndex; i++)
            {
                var s = new[] { close[i - 4], close[i - 1], close[i - 2], close[i - 3] }.Average();
                prevSma4Series.Add(s);
            }
            double prevSma4High = prevSma4Series.Max();
            double prevSma4Low = prevSma4Series.Min();
            double prevSma4Middle = prevSma4Series.Average();

            List<double> prev2Sma4Series = new List<double>();
            for (int i = currentIndex - bandLength + 1; i <= currentIndex; i++)
            {
                var s = new[] { close[i - 4], close[i - 5], close[i - 2], close[i - 3] }.Average();
                prev2Sma4Series.Add(s);
            }
            double prev2Sma4Middle = prev2Sma4Series.Average();
            double prev2Sma4High = prev2Sma4Series.Max();
            double prev2Sma4Low = prev2Sma4Series.Min();


            // === 횡보 구간 ===
            double highestHigh = high.Skip(currentIndex - rangeLookback + 1).Take(rangeLookback).Max();
            double lowestLow = low.Skip(currentIndex - rangeLookback + 1).Take(rangeLookback).Min();
            double priceRange = highestHigh - lowestLow;
            bool isSideways = priceRange > (highestHigh * rangeThresholdPercent / 100.0);

            // === 최근 터치 ===
            if (sma4 == sma4Low)
                sma4LongTouchBar = currentIndex;

            bool isLongRecentTouch = sma4LongTouchBar.HasValue && currentIndex - sma4LongTouchBar.Value >= recentTouchLookback;

            if (sma4 == sma4High)
                sma4ShortTouchBar = currentIndex;

            bool isShortRecentTouch = sma4ShortTouchBar.HasValue && currentIndex - sma4ShortTouchBar.Value >= recentTouchLookback;

            // === 시그널 계산 ===
            if (type == SMABandType.LongBuy)
            {
                return isLongRecentTouch && isSideways && prevSma4 < sma4 && sma4High == sma4 &&
                          prevSma4High > prevSma4 && (prev2Sma4Middle - prevSma4Middle) > (prevSma4Middle - sma4Middle);
            }
            else if(type == SMABandType.ShortBuy)
            {
                return isShortRecentTouch && prevSma4 < sma4 && sma4High == sma4 &&
                          prevSma4High > prevSma4 && (prev2Sma4Middle - prevSma4Middle) > (prevSma4Middle - sma4Middle);
            }
            else if(type == SMABandType.LongSell)
            {
                return (!isSideways && prevSma4High > prevSma4) || (isSideways && prev2Sma4High > prev2Sma4 && prevSma4High > prevSma4);
            }
            else if(type == SMABandType.ShortSell)
            {
                return (!isSideways && prevSma4Low < prevSma4) || (isSideways && prev2Sma4Low < prev2Sma4 && prevSma4Low < prevSma4);
            }
            return false;
        }
    }
}