namespace Aeshnidae.AwakenedRewards;

/// <summary>
/// /ar-lootlog: what actually went into each corpse a player made - for chasing "no kit
/// ever drops" (2026-09-27: Tom watched Lucy McJuicy's kills for a long time and saw no
/// healing or stamina kit, while ACE's corpse simulator made one on about 1 corpse in 12
/// from the same profile). Off by default and not kept across a reload: it is a
/// diagnostic, one log line per corpse while on.
///
/// Read after ACE's Creature.GenerateTreasure has filled the corpse: the treasure profile,
/// every item in the corpse by name, and what the roll handed back that did not end up in
/// the corpse (a full corpse drops the rest).
/// </summary>
[HarmonyPatch]
public static class LootLog
{
    public static bool On;

    /// <summary>Only kills by this player (name, case-insensitive); empty = every player's.</summary>
    public static string Player = "";

    public static int Logged, WithKit, RolledKit;

    /// <summary>What the loot roll handed back for the corpse being made on this thread.</summary>
    [ThreadStatic] private static List<WorldObject>? _rolled;

    [HarmonyPostfix]
    [HarmonyPatch(typeof(LootGenerationFactory), nameof(LootGenerationFactory.CreateRandomLootObjects), new[] { typeof(TreasureDeath) })]
    public static void PostRoll(List<WorldObject> __result)
    {
        if (On)
            _rolled = __result?.ToList();
    }

    [HarmonyPostfix]
    [HarmonyPatch(typeof(Creature), "GenerateTreasure")]
    public static void PostGenerateTreasure(Creature __instance, DamageHistoryInfo killer, Corpse corpse, List<WorldObject> __result)
    {
        if (!On)
            return;

        try
        {
            var who = killer?.TryGetAttacker() as Player ?? (killer?.PetOwner is not null && killer.PetOwner.TryGetTarget(out var owner) ? owner : null);
            if (who is null)
                return;

            if (Player.Length > 0 && !who.Name.Equals(Player, StringComparison.OrdinalIgnoreCase))
                return;

            var items = corpse?.Inventory.Values.ToList() ?? new List<WorldObject>();
            var kit = items.Any(i => i.WeenieType == WeenieType.Healer);
            var rolled = _rolled ?? new List<WorldObject>();
            _rolled = null;
            var rolledKit = rolled.Any(i => i.WeenieType == WeenieType.Healer);

            Logged++;
            if (kit) WithKit++;
            if (rolledKit) RolledKit++;

            // Rolled but not in the corpse: ACE's TryAddToInventory failed and the item was lost.
            var lost = rolled.Where(r => !items.Any(i => ReferenceEquals(i, r) || i.Guid == r.Guid)).Select(r => r.Name).ToList();

            var profile = __instance.DeathTreasureType;
            var names = items.Count == 0 ? "empty" : string.Join(", ", items.Select(i => $"{i.Name}{(i.WeenieType == WeenieType.Healer ? " [KIT]" : "")}"));
            var dropped = __result is { Count: > 0 } ? $"; not in the corpse: {string.Join(", ", __result.Select(i => i.Name))}" : "";

            ModManager.Log($"[{Mod.Name}] lootlog: {who.Name} killed {__instance.Name} (profile {profile?.ToString() ?? "none"}) in {__instance.CurrentLandblock?.Id.Landblock:X4}: " +
                           $"{items.Count} item(s): {names}{dropped}{(lost.Count > 0 ? $"; ROLLED BUT LOST: {string.Join(", ", lost)}" : "")} " +
                           $"[corpses {Logged}, kit rolled {RolledKit}, kit in corpse {WithKit}]");
        }
        catch (Exception ex)
        {
            ModManager.Log($"[{Mod.Name}] lootlog failed: {ex.Message}", ModManager.LogLevel.Warn);
        }
    }
}