using RobocraftX.Blocks.Ghost;
using RobocraftX.Character.Camera;
using RobocraftX.Character.Factories;
using Svelto.ECS;

namespace GamecraftModdingAPI.Blocks
{
    public class BlockUtility
    {
        /// <summary>
        /// Returns the block the player is currently looking at.
        /// </summary>
        /// <param name="playerId">The player's ID</param>
        /// <param name="entitiesDB">The entities DB</param>
        /// <param name="maxDistance">The maximum distance from the player (default is the player's building reach)</param>
        /// <returns>The block's EGID or null if not found</returns>
        public static EGID? GetBlockLookedAt(uint playerId, EntitiesDB entitiesDB, float maxDistance = -1f)
        {
            if (!entitiesDB.TryQueryMappedEntities<CharacterCameraRayCastEntityStruct>(
                CameraExclusiveGroups.CameraGroup, out var mapper))
                return null;
            mapper.TryGetEntity(playerId, out CharacterCameraRayCastEntityStruct rayCast);
            float distance = maxDistance < 0
                ? GhostBlockUtils.GetBuildInteractionDistance(entitiesDB, rayCast)
                : maxDistance;
            if (rayCast.hit && rayCast.distance <= distance)
                return rayCast.hitEgid;
            return null;
        }
    }
}