using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KssSmaPlaLib.InBox
{
    public class LineFilterUxer : IFilterUxer<string>
    {
        private readonly HashSet<string> includedLines;
        private readonly HashSet<string> excludedLines;

        public LineFilterUxer(IEnumerable<string> included, IEnumerable<string> excluded)
        {
            includedLines = new HashSet<string>(included ?? Enumerable.Empty<string>());
            excludedLines = new HashSet<string>(excluded ?? Enumerable.Empty<string>());
        }

        public IEnumerable<string> ApplyFilter(IEnumerable<string> lineNames)
        {
            if (includedLines.Any())
            {
                // Included優先 → lineNamesの中でincludedに含まれるものだけ返す
                return lineNames.Where(name => includedLines.Contains(name));
            }

            // Excluded適用 → lineNamesの中でexcludedに含まれないものだけ返す
            return lineNames.Where(name => !excludedLines.Contains(name));
        }

        public bool CanPass(string lineName)
        {
            return HasAnyPass(new[] { lineName });
        }

        public bool HasAnyPass(IEnumerable<string> candidates)
        {
            return ApplyFilter(candidates).Any();
        }
    }
}