using NeonSprawl.Server.Game.Items;

namespace NeonSprawl.Server.Game.Encounters;

/// <summary>
/// NEO-106: wires ability-cast combat outcomes to encounter activation, defeat progress, and completion grants.
/// Best-effort on the cast accept path — outcome does not change <c>AbilityCastResponse</c> JSON.
/// </summary>
public static class EncounterCombatWiring
{
    /// <summary>
    /// On damaging hits, activates encounter progress; on lethal hits, records defeat and may grant rewards.
    /// </summary>
    public static void TryProcessCastOutcome(
        string playerId,
        string targetNpcInstanceId,
        int damageDealt,
        bool targetDefeated,
        IEncounterDefinitionRegistry encounterRegistry,
        IRewardTableDefinitionRegistry rewardTableRegistry,
        IEncounterProgressStore progressStore,
        IEncounterCompletionStore completionStore,
        IItemDefinitionRegistry itemRegistry,
        IPlayerInventoryStore inventoryStore,
        TimeProvider timeProvider,
        ILogger? logger = null)
    {
        if (damageDealt > 0)
        {
            EncounterProgressOperations.TryActivateOnFirstEngagement(
                playerId,
                targetNpcInstanceId,
                encounterRegistry,
                progressStore,
                completionStore);
        }

        if (!targetDefeated)
        {
            return;
        }

        if (!EncounterProgressOperations.TryMarkTargetDefeated(
                playerId,
                targetNpcInstanceId,
                encounterRegistry,
                progressStore,
                completionStore))
        {
            return;
        }

        if (!EncounterProgressOperations.TryResolveEncounterForNpc(
                targetNpcInstanceId,
                encounterRegistry,
                out var encounterId,
                out _))
        {
            return;
        }

        if (!EncounterProgressOperations.IsAllRequiredTargetsDefeated(
                playerId,
                encounterId,
                encounterRegistry,
                progressStore))
        {
            return;
        }

        var completion = EncounterCompletionOperations.TryCompleteAndGrant(
            playerId,
            encounterId,
            encounterRegistry,
            rewardTableRegistry,
            progressStore,
            completionStore,
            itemRegistry,
            inventoryStore,
            timeProvider);

        if (!completion.Success)
        {
            logger?.LogDebug(
                "Encounter completion grant skipped for player {PlayerId} encounter {EncounterId} ({ReasonCode})",
                playerId,
                encounterId,
                completion.ReasonCode);
            return;
        }

        // --- Telemetry hook site (NEO-109): future E9.M1 catalog event `encounter_complete` ---
        // TODO(E9.M1): catalog emit — once per player+encounter when grants commit (NEO-106 cast path).
    }
}