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

namespace BurnOutSharp.ProtectionType
{
    public class CDLock : IContentCheck, IPathCheck
    {
        /// <inheritdoc/>
        public string CheckContents(string file, byte[] fileContent, bool includePosition = false)
        {
            // "2" + (char)0xF2 + (char)0x02 + (char)0x82 + (char)0xC3 + (char)0xBC + (char)0x0B + "$" + (char)0x99 + (char)0xAD + "'C" + (char)0xE4 + (char)0x9D + "st" + (char)0x99 + (char)0xFA + "2$" + (char)0x9D + ")4" + (char)0xFF + "t"
            byte?[] check = new byte?[] { 0x32, 0xF2, 0x02, 0x82, 0xC3, 0xBC, 0x0B, 0x24, 0x99, 0xAD, 0x27, 0x43, 0xE4, 0x9D, 0x73, 0x74, 0x99, 0xFA, 0x32, 0x24, 0x9D, 0x29, 0x34, 0xFF, 0x74 };
            if (fileContent.FirstPosition(check, out int position))
                return "CD-Lock" + (includePosition ? $" (Index {position})" : string.Empty);

            return null;
        }

        /// <inheritdoc/>
        public string CheckDirectoryPath(string path, IEnumerable<string> files)
        {
            if (files.Any(f => Path.GetExtension(f).Trim('.').Equals("AFP", StringComparison.OrdinalIgnoreCase)))
                return "CD-Lock";

            return null;
        }

        /// <inheritdoc/>
        public string CheckFilePath(string path)
        {
            if (Path.GetExtension(path).Trim('.').Equals("AFP", StringComparison.OrdinalIgnoreCase))
                return "CD-Lock";
            
            return null;
        }
    }
}