using System;
using System.Collections.Generic;
using System.Linq;
using BurnOutSharp.Matching;

namespace BurnOutSharp.ProtectionType
{
    public class JoWooDXProt : IContentCheck
    {
        /// <inheritdoc/>
        public List<ContentMatchSet> GetContentMatchSets()
        {
            return new List<ContentMatchSet>
            {
                // @HC09    
                new ContentMatchSet(new byte?[] { 0x40, 0x48, 0x43, 0x30, 0x39, 0x20, 0x20, 0x20, 0x20 }, "JoWooD X-Prot v2"),

                new ContentMatchSet(new List<byte?[]>
                {
                    // .ext    
                    new byte?[] { 0x2E, 0x65, 0x78, 0x74, 0x20, 0x20, 0x20, 0x20 },

                    // kernel32.dll + (char)0x00 + (char)0x00 + (char)0x00 + VirtualProtect
                    new byte?[]
                    {
                        0x6B, 0x65, 0x72, 0x6E, 0x65, 0x6C, 0x33, 0x32,
                        0x2E, 0x64, 0x6C, 0x6C, 0x00, 0x00, 0x00, 0x56,
                        0x69, 0x72, 0x74, 0x75, 0x61, 0x6C, 0x50, 0x72,
                        0x6F, 0x74, 0x65, 0x63, 0x74
                    },
                }, GetVersion, "JoWooD X-Prot"),

                // .ext      
                new ContentMatchSet(new byte?[] { 0x2E, 0x65, 0x78, 0x74, 0x20, 0x20, 0x20, 0x20 }, "JoWooD X-Prot v1"),
            };
        }

        /// <inheritdoc/>
        public string CheckContents(string file, byte[] fileContent, bool includeDebug = false) => null;

        public static string GetVersion(string file, byte[] fileContent, List<int> positions)
        {
            int position = positions[1]--; // TODO: Verify this subtract
            char[] version = new ArraySegment<byte>(fileContent, position + 67, 8).Select(b => (char)b).ToArray();
            return $"{version[0]}.{version[2]}.{version[4]}.{version[6]}{version[7]}";
        }
    }
}