extends Node

#Achievement e statistiche devono essere pubblicati live nel backend
#Steamworks anche se il gioco non è ancora uscito altrimenti le chiamate ritornano errore
const KNOWN := [
	"ACH_FIRST_WIN",
	"ACH_PLAY_10_GAMES",
	"ACH_REACH_LEVEL_5",
]

#how it works:
#func _on_player_won() -> void:
#    Achievements.unlock("ACH_FIRST_WIN") #unlock the achievement at first win

#func _on_match_finished(coins_collected: int) -> void:
	#update stats
	#...
	#check thresholds and unlock achievements
#    if Stats.get_int("stat_games_played") >= 10:
#        Achievements.unlock("ACH_PLAY_10_GAMES")
#    if Stats.get_int("stat_total_coins") >= 100:
#        Achievements.unlock("ACH_COLLECT_100_COINS")

signal unlocked(api_name: String)

func _ready() -> void:
	if not SteamManager.is_on_steam:
		return
	
	Steam.user_achievement_stored.connect(_on_achievement_stored)
	Steam.global_achievement_percentages_ready.connect(_on_global_percentages_ready)
	Steam.requestGlobalAchievementPercentages()   # asincrona

func _on_global_percentages_ready(_game: int, _result: int) -> void:
	pass

func unlock(api_name: String) -> void:
	if not KNOWN.has(api_name):
		push_warning("Achievement unknown: %s" % api_name)
		return
	if is_unlocked(api_name):
		return
	if not Steam.setAchievement(api_name):
		push_error("setAchievement failed (is published on Steam?): %s" % api_name)
		return
	Steam.storeStats()
	unlocked.emit(api_name)

func is_unlocked(api_name: String) -> bool:
	var data: Dictionary = Steam.getAchievement(api_name)
	return data.get("achieved", false)

func get_display_name(api_name: String) -> String:
	return Steam.getAchievementDisplayAttribute(api_name, "name")

func get_description(api_name: String) -> String:
	return Steam.getAchievementDisplayAttribute(api_name, "desc")

#Global percentage of player who have unlocked the achievement
func get_global_percent(api_name: String) -> float:
	var data: Dictionary = Steam.getAchievementAchievedPercent(api_name)
	if not data.get("ret", false):
		return -1.0   #global percentage not yet available
	return data.get("percent", 0.0)
	
#for development only: reset an achievement
func clear(api_name: String) -> void:
	Steam.clearAchievement(api_name)
	Steam.storeStats()

func _on_achievement_stored(_game: int, _group: bool, api_name: String,
		current: int, maximum: int) -> void:
	print("Achievement confirmed by server: %s (%d/%d)" % [api_name, current, maximum])