using Microsoft.Extensions.Logging;

namespace NewMoon.Samples.NPC;

/// <summary>
/// The custom NPC: a <c>npc_bot_newmoon</c> classname that is a factory alias of <c>base_boss</c>. Spawning it yields a real
/// <c>base_boss</c> that carries the new classname, and the registry calls the lifecycle overrides below.
/// </summary>
/// <remarks>
/// The class only logs, through the <see cref="FCustomEntity.PLogger"/> the registry supplies. The spawner supplies <c>health</c>
/// and <c>model</c>, for example <c>ent_create npc_bot_newmoon health 500 model models/bots/headless_hatman.mdl</c>. The registry
/// constructs the class through dependency injection, so it needs a public constructor; any constructor parameters are resolved
/// from the plugin's services. The plugin registers it automatically at start-up.
/// </remarks>
[CustomEntity("npc_bot_newmoon", "base_boss", PrecacheModels = ["models/bots/headless_hatman.mdl"])]
internal sealed class NPCBotNewMoon : FCustomEntity
{
    // Captured at spawn so the remove log never depends on the view still resolving while the instance is torn down.
    private int _index = -1;

    /// <inheritdoc/>
    protected override void OnSpawn()
    {
        _index = Entity.Index;
        PLogger.LogNPCSpawn(_index);
    }

    /// <inheritdoc/>
    protected override void OnActivate() => PLogger.LogNPCActivate(_index);

    /// <inheritdoc/>
    protected override void OnRemoved() => PLogger.LogNPCRemoved(_index);
}