using System;
using System.Collections.Generic;
using static NHSE.Core.FileHashRevision;

namespace NHSE.Core;

/// <summary>
/// Logic for detecting a <see cref="EncryptedFilePair"/> revision.
/// </summary>
public static class RevisionChecker
{
    /// <summary>
    /// Unique save file size list by patch.
    /// </summary>
    private static readonly SaveFileSizes[] SizesByRevision =
    [
        new(REV_100_MAIN, REV_100_PERSONAL, REV_100_PHOTO, REV_100_POSTBOX, REV_100_PROFILE), // 1.0.0
        new(REV_110_MAIN, REV_110_PERSONAL, REV_110_PHOTO, REV_110_POSTBOX, REV_110_PROFILE), // 1.1.0
        new(REV_120_MAIN, REV_120_PERSONAL, REV_120_PHOTO, REV_120_POSTBOX, REV_120_PROFILE), // 1.2.0
        new(REV_130_MAIN, REV_130_PERSONAL, REV_130_PHOTO, REV_130_POSTBOX, REV_130_PROFILE), // 1.3.0
        new(REV_140_MAIN, REV_140_PERSONAL, REV_140_PHOTO, REV_140_POSTBOX, REV_140_PROFILE), // 1.4.0
        new(REV_150_MAIN, REV_150_PERSONAL, REV_150_PHOTO, REV_150_POSTBOX, REV_150_PROFILE), // 1.5.0
        new(REV_160_MAIN, REV_160_PERSONAL, REV_160_PHOTO, REV_160_POSTBOX, REV_160_PROFILE), // 1.6.0
        new(REV_170_MAIN, REV_170_PERSONAL, REV_170_PHOTO, REV_170_POSTBOX, REV_170_PROFILE), // 1.7.0
        new(REV_180_MAIN, REV_180_PERSONAL, REV_180_PHOTO, REV_180_POSTBOX, REV_180_PROFILE), // 1.8.0
        new(REV_190_MAIN, REV_190_PERSONAL, REV_190_PHOTO, REV_190_POSTBOX, REV_190_PROFILE), // 1.9.0
        new(REV_1100_MAIN,REV_1100_PERSONAL,REV_1100_PHOTO,REV_1100_POSTBOX,REV_1100_PROFILE),// 1.10.0
        new(REV_1110_MAIN,REV_1110_PERSONAL,REV_1110_PHOTO,REV_1110_POSTBOX,REV_1110_PROFILE),// 1.11.0
        new(REV_200_MAIN, REV_200_PERSONAL, REV_200_PHOTO, REV_200_POSTBOX, REV_200_PROFILE, REV_200_WHEREAREN), // 2.0.0
        new(REV_300_MAIN, REV_300_PERSONAL, REV_300_PHOTO, REV_300_POSTBOX, REV_300_PROFILE, REV_300_WHEREAREN), // 3.0.0
    ];

    private static readonly FileHeaderInfo[] RevisionInfo =
    [
        new() { Major = 0x00067, Minor = 0x0006F, HeaderRevision = 0, Unk1 = 2, SaveRevision = 00, Unk2 = 2 }, // 1.0.0
        new() { Major = 0x0006D, Minor = 0x00078, HeaderRevision = 0, Unk1 = 2, SaveRevision = 01, Unk2 = 2 }, // 1.1.0
        new() { Major = 0x0006D, Minor = 0x00078, HeaderRevision = 0, Unk1 = 2, SaveRevision = 02, Unk2 = 2 }, // 1.1.1
        new() { Major = 0x0006D, Minor = 0x00078, HeaderRevision = 0, Unk1 = 2, SaveRevision = 03, Unk2 = 2 }, // 1.1.2
        new() { Major = 0x0006D, Minor = 0x00078, HeaderRevision = 0, Unk1 = 2, SaveRevision = 04, Unk2 = 2 }, // 1.1.3
        new() { Major = 0x0006D, Minor = 0x00078, HeaderRevision = 0, Unk1 = 2, SaveRevision = 05, Unk2 = 2 }, // 1.1.4
        new() { Major = 0x20006, Minor = 0x20008, HeaderRevision = 0, Unk1 = 2, SaveRevision = 06, Unk2 = 2 }, // 1.2.0
        new() { Major = 0x20006, Minor = 0x20008, HeaderRevision = 0, Unk1 = 2, SaveRevision = 07, Unk2 = 2 }, // 1.2.1
        new() { Major = 0x40002, Minor = 0x40008, HeaderRevision = 0, Unk1 = 2, SaveRevision = 08, Unk2 = 2 }, // 1.3.0
        new() { Major = 0x40002, Minor = 0x40008, HeaderRevision = 0, Unk1 = 2, SaveRevision = 09, Unk2 = 2 }, // 1.3.1
        new() { Major = 0x50001, Minor = 0x5000B, HeaderRevision = 0, Unk1 = 2, SaveRevision = 10, Unk2 = 2 }, // 1.4.0
        new() { Major = 0x50001, Minor = 0x5000B, HeaderRevision = 0, Unk1 = 2, SaveRevision = 11, Unk2 = 2 }, // 1.4.1
        new() { Major = 0x50001, Minor = 0x5000B, HeaderRevision = 0, Unk1 = 2, SaveRevision = 12, Unk2 = 2 }, // 1.4.2
        new() { Major = 0x60001, Minor = 0x6000C, HeaderRevision = 0, Unk1 = 2, SaveRevision = 13, Unk2 = 2 }, // 1.5.0
        new() { Major = 0x60001, Minor = 0x6000C, HeaderRevision = 0, Unk1 = 2, SaveRevision = 14, Unk2 = 2 }, // 1.5.1
        new() { Major = 0x70001, Minor = 0x70006, HeaderRevision = 0, Unk1 = 2, SaveRevision = 15, Unk2 = 2 }, // 1.6.0
        new() { Major = 0x74001, Minor = 0x74005, HeaderRevision = 0, Unk1 = 2, SaveRevision = 16, Unk2 = 2 }, // 1.7.0
        new() { Major = 0x78001, Minor = 0x78001, HeaderRevision = 0, Unk1 = 2, SaveRevision = 17, Unk2 = 2 }, // 1.8.0
        new() { Major = 0x7C001, Minor = 0x7C006, HeaderRevision = 0, Unk1 = 2, SaveRevision = 18, Unk2 = 2 }, // 1.9.0
        new() { Major = 0x7D001, Minor = 0x7D004, HeaderRevision = 0, Unk1 = 2, SaveRevision = 19, Unk2 = 2 }, // 1.10.0
        new() { Major = 0x7E001, Minor = 0x7E001, HeaderRevision = 0, Unk1 = 2, SaveRevision = 20, Unk2 = 2 }, // 1.11.0
        new() { Major = 0x7E001, Minor = 0x7E001, HeaderRevision = 0, Unk1 = 2, SaveRevision = 21, Unk2 = 2 }, // 1.11.1
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 22, Unk2 = 2 }, // 2.0.0
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 23, Unk2 = 2 }, // 2.0.1
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 24, Unk2 = 2 }, // 2.0.2
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 25, Unk2 = 2 }, // 2.0.3
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 26, Unk2 = 2 }, // 2.0.4
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 27, Unk2 = 2 }, // 2.0.5
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 28, Unk2 = 2 }, // 2.0.6
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 29, Unk2 = 2 }, // 2.0.7
        new() { Major = 0x80009, Minor = 0x80085, HeaderRevision = 0, Unk1 = 2, SaveRevision = 30, Unk2 = 2 }, // 2.0.8
        new() { Major = 0xA0002, Minor = 0xA0028, HeaderRevision = 0, Unk1 = 2, SaveRevision = 31, Unk2 = 2 }, // 3.0.0
        new() { Major = 0xA0002, Minor = 0xA0028, HeaderRevision = 0, Unk1 = 2, SaveRevision = 32, Unk2 = 2 }, // 3.0.1
        new() { Major = 0xA0002, Minor = 0xA0028, HeaderRevision = 0, Unk1 = 2, SaveRevision = 33, Unk2 = 2 }, // 3.0.2
        new() { Major = 0xA0002, Minor = 0xA0028, HeaderRevision = 0, Unk1 = 2, SaveRevision = 34, Unk2 = 2 }, // 3.0.3
    ];

    public static readonly IReadOnlyList<SaveFileSizes> SizeInfo =
    [
        SizesByRevision[0], // 1.0.0
        SizesByRevision[1], // 1.1.0
        SizesByRevision[1], // 1.1.1
        SizesByRevision[1], // 1.1.2
        SizesByRevision[1], // 1.1.3
        SizesByRevision[1], // 1.1.4
        SizesByRevision[2], // 1.2.0
        SizesByRevision[2], // 1.2.1
        SizesByRevision[3], // 1.3.0
        SizesByRevision[3], // 1.3.1
        SizesByRevision[4], // 1.4.0
        SizesByRevision[4], // 1.4.1
        SizesByRevision[4], // 1.4.2
        SizesByRevision[5], // 1.5.0
        SizesByRevision[5], // 1.5.1
        SizesByRevision[6], // 1.6.0
        SizesByRevision[7], // 1.7.0
        SizesByRevision[8], // 1.8.0
        SizesByRevision[9], // 1.9.0
        SizesByRevision[10], // 1.10.0
        SizesByRevision[11], // 1.11.0
        SizesByRevision[11], // 1.11.1
        SizesByRevision[12], // 2.0.0
        SizesByRevision[12], // 2.0.1
        SizesByRevision[12], // 2.0.2
        SizesByRevision[12], // 2.0.3
        SizesByRevision[12], // 2.0.4
        SizesByRevision[12], // 2.0.5
        SizesByRevision[12], // 2.0.6
        SizesByRevision[12], // 2.0.7
        SizesByRevision[12], // 2.0.8
        SizesByRevision[13], // 3.0.0
        SizesByRevision[13], // 3.0.1
        SizesByRevision[13], // 3.0.2
        SizesByRevision[13], // 3.0.3
    ];

    public static readonly IReadOnlyList<FileHashInfo> HashInfo =
    [
        REV_100, // 1.0.0
        REV_110, // 1.1.0
        REV_110, // 1.1.1
        REV_110, // 1.1.2
        REV_110, // 1.1.3
        REV_110, // 1.1.4
        REV_120, // 1.2.0
        REV_120, // 1.2.1
        REV_130, // 1.3.0
        REV_130, // 1.3.1
        REV_140, // 1.4.0
        REV_140, // 1.4.1
        REV_140, // 1.4.2
        REV_150, // 1.5.0
        REV_150, // 1.5.1
        REV_160, // 1.6.0
        REV_170, // 1.7.0
        REV_180, // 1.8.0
        REV_190, // 1.9.0
        REV_1100, // 1.10.0
        REV_1110, // 1.11.0
        REV_1110, // 1.11.1
        REV_200, // 2.0.0
        REV_200, // 2.0.1
        REV_200, // 2.0.2
        REV_200, // 2.0.3
        REV_200, // 2.0.4
        REV_200, // 2.0.5
        REV_200, // 2.0.6
        REV_200, // 2.0.7
        REV_200, // 2.0.8
        REV_300, // 3.0.0
        REV_300, // 3.0.1
        REV_300, // 3.0.2
        REV_300, // 3.0.3
    ];

    extension(FileHeaderInfo info)
    {
        public bool IsRevisionKnown() => info.GetKnownRevisionIndex() >= 0;
        public int GetKnownRevisionIndex() => Array.FindIndex(RevisionInfo, z => z.Equals(info));
    }
}