package scalevalapokalypsi.Model.Entities

import scala.collection.mutable.Buffer
import scalevalapokalypsi.Model.*

/** A `Player` object represents a player character controlled by one real-life player
 * of the program.
 *
 * A player object’s state is mutable: the player’s location and possessions can change,
 * for instance.
 *
 * @param name the player's name
 * @param initialLocation the player’s initial location
 */
class Player(name: String, initialLocation: Area) extends Entity(name, initialLocation):

	private val observations: Buffer[String] = Buffer.empty
	private var pendingSingEffect: Option[Float => String] = None

	override def observe(observation: String): Unit =
		this.observations.append(observation)

	def readAndClearObservations(): Vector[String] =
		val res = this.observations.toVector
		observations.clear()
		res
		
	/** Returns whether this player has a pending sing effect. */
	def isSinging: Boolean = this.pendingSingEffect.isDefined

	/** Makes this player start singing, i.e. gives it this sing effect to
	 * complete.
	 *
	 * @param effect the effect to apply based on the song.
	 */
	def setSingEffect(effect: Float => String): Unit =
		this.pendingSingEffect = Some(effect)

	/** Applies the pending sing effect.
	 *
	 * @param singQuality the quality of the song
	 * @return            a textual description of the effects of the song,
	 *                    or None if there was no pending sing effect.
	 */
	def applySingEffect(singQuality: Float): Option[String] =
		val res = this.pendingSingEffect.map(f => f(singQuality))
		this.pendingSingEffect = None
		res
		
end Player