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

namespace BurnOutSharp.ProtectionType
{
    public class Origin
    {
        public static string CheckContents(byte[] fileContent, bool includePosition = false)
        {
            // O + (char)0x00 + r + (char)0x00 + i + (char)0x00 + g + (char)0x00 + i + (char)0x00 + n + (char)0x00 + S + (char)0x00 + e + (char)0x00 + t + (char)0x00 + u + (char)0x00 + p + (char)0x00 + . + (char)0x00 + e + (char)0x00 + x + (char)0x00 + e + (char)0x00
            byte[] check = new byte[] { 0x4F, 0x00, 0x72, 0x00, 0x69, 0x00, 0x67, 0x00, 0x69, 0x00, 0x6E, 0x00, 0x53, 0x00, 0x65, 0x00, 0x74, 0x00, 0x75, 0x00, 0x70, 0x00, 0x2E, 0x00, 0x65, 0x00, 0x78, 0x00, 0x65, 0x00 };
            if (fileContent.Contains(check, out int position))
                return "Origin" + (includePosition ? $" (Index {position})" : string.Empty);

            return null;
        }

        public static string CheckPath(string path, IEnumerable<string> files, bool isDirectory)
        {
            if (isDirectory)
            {
                if (files.Any(f => Path.GetFileName(f).Equals("OriginSetup.exe", StringComparison.OrdinalIgnoreCase)))
                    return "Origin";
            }
            else
            {
                if (Path.GetFileName(path).Equals("OriginSetup.exe", StringComparison.OrdinalIgnoreCase))
                    return "Origin";
            }

            return null;
        }
    }
}