using AcDream.Core.Net.Messages;
using AcDream.Runtime.Gameplay;

namespace AcDream.Runtime.Tests.Gameplay;

/// <summary>
/// Campaign OP slice OP1 (2026-08-10) conformance for
/// <see cref="CharacterOptionTable"/> — table completeness across the
/// complete <c>0x00..0x34</c> id space, the auto-save split pinned
/// id-by-id against
/// docs/research/2026-08-10-set-character-options-wire.md §3.2's
/// byte-verified table, the client-Defaults split against §8.2's, and
/// unknown-id rejection (ACE throws on an unmodeled id — one must never
/// reach the wire, wire doc §5.4.2).
/// </summary>
public sealed class CharacterOptionTableTests
{
    // wire research §3.2 — CPlayerModule::IsAutoSaveOption @0x0059A600,
    // byte-verified 0x34-byte table at VA 0x0059A62C. 21 ids.
    private static readonly CharacterOptionId[] AutoSaveIds =
    [
        CharacterOptionId.AutoRepeatAttack,
        CharacterOptionId.IgnoreAllegianceRequests,
        CharacterOptionId.IgnoreFellowshipRequests,
        CharacterOptionId.FellowshipShareXP,
        CharacterOptionId.AcceptLootPermits,
        CharacterOptionId.FellowshipShareLoot,
        CharacterOptionId.FellowshipAutoAcceptRequests,
        CharacterOptionId.UseChargeAttack,
        CharacterOptionId.ListenToAllegianceChat,
        CharacterOptionId.ListenToGeneralChat,
        CharacterOptionId.ListenToTradeChat,
        CharacterOptionId.ListenToLFGChat,
        CharacterOptionId.ListenToRoleplayChat,
        CharacterOptionId.AppearOffline,
        CharacterOptionId.LeadMissileTargets,
        CharacterOptionId.UseFastMissiles,
        CharacterOptionId.ListenToSocietyChat,
        CharacterOptionId.ShowHelm,
        CharacterOptionId.UseMouseTurning,
        CharacterOptionId.ShowCloak,
        CharacterOptionId.LockUI,
    ];

    // wire research §8.2 — PlayerModule::GetDefaultOptionValue @0x005D2A30,
    // byte-verified 0x2B-byte table at VA 0x005D2A5C. 16 default-ON ids
    // (every id past 0x2A falls off the end of that table and defaults to
    // false, even though 3 of them are ON in the raw constructor word —
    // see the divergence register row, D3/OP1).
    private static readonly CharacterOptionId[] ClientDefaultOnIds =
    [
        CharacterOptionId.AutoRepeatAttack,
        CharacterOptionId.IgnoreFellowshipRequests,
        CharacterOptionId.AllowGive,
        CharacterOptionId.ShowTooltips,
        CharacterOptionId.ToggleRun,
        CharacterOptionId.AutoTarget,
        CharacterOptionId.VividTargetingIndicator,
        CharacterOptionId.FellowshipShareXP,
        CharacterOptionId.CoordinatesOnRadar,
        CharacterOptionId.SpellDuration,
        CharacterOptionId.UseChargeAttack,
        CharacterOptionId.ListenToAllegianceChat,
        CharacterOptionId.ListenToGeneralChat,
        CharacterOptionId.ListenToTradeChat,
        CharacterOptionId.ListenToLFGChat,
        CharacterOptionId.LeadMissileTargets,
    ];

    [Fact]
    public void All_HasExactly53Entries_Ids0x00Through0x34Contiguous()
    {
        CharacterOptionTableEntry[] all = [.. CharacterOptionTable.All];

        Assert.Equal(53, all.Length);
        for (uint id = 0x00; id <= 0x34; id++)
        {
            Assert.True(
                CharacterOptionTable.TryGet(id, out CharacterOptionTableEntry entry),
                $"id 0x{id:X2} missing from CharacterOptionTable");
            Assert.Equal(id, (uint)entry.Id);
        }
    }

    [Theory]
    [MemberData(nameof(AllModeledIds))]
    public void IsAutoSave_MatchesByteVerifiedSplit(CharacterOptionId id)
    {
        bool expected = Array.IndexOf(AutoSaveIds, id) >= 0;

        Assert.True(CharacterOptionTable.TryGet(id, out CharacterOptionTableEntry entry));
        Assert.Equal(expected, entry.IsAutoSave);
    }

    [Theory]
    [MemberData(nameof(AllModeledIds))]
    public void ClientDefault_MatchesByteVerifiedSplit(CharacterOptionId id)
    {
        bool expected = Array.IndexOf(ClientDefaultOnIds, id) >= 0;

        Assert.True(CharacterOptionTable.TryGet(id, out CharacterOptionTableEntry entry));
        Assert.Equal(expected, entry.ClientDefault);
    }

    [Fact]
    public void AutoSaveIds_CountIs21()
    {
        Assert.Equal(21, AutoSaveIds.Length);
        Assert.Equal(21, CharacterOptionTable.All.Count(static e => e.IsAutoSave));
    }

    [Fact]
    public void ClientDefaultOnIds_CountIs16()
    {
        Assert.Equal(16, ClientDefaultOnIds.Length);
        Assert.Equal(16, CharacterOptionTable.All.Count(static e => e.ClientDefault));
    }

    [Fact]
    public void ReconstructedClientDefaultWords_MatchIndependentlyConfirmedConstants()
    {
        // wire research §1.4/§2.5: OR'ing every ClientDefault=true row's mask
        // into its own word reconstructs EXACTLY CharacterOptions1.Default
        // (0x50C4A54A, also the retail constructor literal) for Options1,
        // and 0x00008700 for Options2 — the client Defaults-button value,
        // deliberately NOT the same as the raw constructor default
        // (0x00948700, RuntimeCharacterOptionsState.DefaultOptions2) because
        // GetDefaultOptionValue's table stops at id 0x2A.
        uint options1 = 0u;
        uint options2 = 0u;
        foreach (CharacterOptionTableEntry entry in CharacterOptionTable.All)
        {
            if (!entry.ClientDefault) continue;
            if (entry.IsOptions1) options1 |= entry.Mask;
            else options2 |= entry.Mask;
        }

        Assert.Equal(0x50C4A54Au, options1);
        Assert.Equal(0x00008700u, options2);
    }

    [Theory]
    [InlineData(0x35u)] // CharacterOptions1Default — the WHOLE default mask, not a real option
    [InlineData(0x36u)] // CharacterOptions2Default — same landmine, other word
    [InlineData(0xFFFFu)]
    [InlineData(0xFFFFFFFFu)]
    public void TryGet_RejectsUnknownAndReservedIds(uint optionId)
    {
        Assert.False(CharacterOptionTable.TryGet(optionId, out _));
    }

    [Fact]
    public void SpotCheck_WordAndMaskAgainstVerbatimAcclientEnums()
    {
        // acclient.h:3404-3436 `enum CharacterOption` / :3451-3481
        // `enum CharacterOptions2`.
        Assert.True(CharacterOptionTable.TryGet(
            CharacterOptionId.AutoRepeatAttack, out CharacterOptionTableEntry autoRepeat));
        Assert.True(autoRepeat.IsOptions1);
        Assert.Equal(0x00000002u, autoRepeat.Mask);

        // PersistentAtDay (id 0x05) lives in Options2 despite its low id —
        // acclient.h:3454 `PersistentAtDay_CharacterOptions2 = 0x1`.
        Assert.True(CharacterOptionTable.TryGet(
            CharacterOptionId.PersistentAtDay, out CharacterOptionTableEntry persistentAtDay));
        Assert.False(persistentAtDay.IsOptions1);
        Assert.Equal(0x00000001u, persistentAtDay.Mask);

        Assert.True(CharacterOptionTable.TryGet(
            CharacterOptionId.ListenToAllegianceChat, out CharacterOptionTableEntry allegiance));
        Assert.True(allegiance.IsOptions1);
        Assert.Equal(0x40000000u, allegiance.Mask);

        // HearPkDeathMessages (0x34) — ACE-sourced, unverifiable against the
        // 2013 binary; register row.
        Assert.True(CharacterOptionTable.TryGet(
            CharacterOptionId.HearPkDeathMessages, out CharacterOptionTableEntry pkDeath));
        Assert.False(pkDeath.IsOptions1);
        Assert.Equal(0x02000000u, pkDeath.Mask);
        Assert.False(pkDeath.IsAutoSave);
    }

    public static IEnumerable<object[]> AllModeledIds()
    {
        for (uint id = 0x00; id <= 0x34; id++)
            yield return [(CharacterOptionId)id];
    }
}