From 9a3c383b269e835d0fcffe472eefb6e2acc73ddb Mon Sep 17 00:00:00 2001
From: TheThomaas <thethomaas@protonmail.ch>
Date: Tue, 6 Oct 2026 13:27:26 +0200
Subject: [PATCH] Start work on battle system

---
 game/battle/battle.gd                     | 297 ++++++++++++++++++++++
 game/battle/battle.gd.uid                 |   1 +
 game/battle/battle_action.gd              |  48 ++++
 game/battle/battle_action.gd.uid          |   1 +
 game/battle/battle_ai.gd                  | 143 +++++++++++
 game/battle/battle_ai.gd.uid              |   1 +
 game/battle/battle_controller.gd          |  11 +
 game/battle/battle_controller.gd.uid      |   1 +
 game/battle/battle_debug.gd               |  49 ++++
 game/battle/battle_debug.gd.uid           |   1 +
 game/battle/battle_event.gd               |  55 ++++
 game/battle/battle_event.gd.uid           |   1 +
 game/battle/battle_mon.gd                 |  33 +++
 game/battle/battle_mon.gd.uid             |   1 +
 game/battle/battle_participant.gd         |  36 +++
 game/battle/battle_participant.gd.uid     |   1 +
 game/battle/battle_presenter.gd           |   8 +
 game/battle/battle_presenter.gd.uid       |   1 +
 game/battle/battle_print_presenter.gd     |   8 +
 game/battle/battle_print_presenter.gd.uid |   1 +
 game/battle/battle_setup.gd               |  38 +++
 game/battle/battle_setup.gd.uid           |   1 +
 game/battle/battle_slot.gd                |  25 ++
 game/battle/battle_slot.gd.uid            |   1 +
 game/battle/damage_calculator.gd          |  40 +++
 game/battle/damage_calculator.gd.uid      |   1 +
 game/battle/target_resolver.gd            |  67 +++++
 game/battle/target_resolver.gd.uid        |   1 +
 game/battle/type_chart.gd                 |  41 +++
 game/battle/type_chart.gd.uid             |   1 +
 game/world/battle.tscn                    |   6 +
 31 files changed, 920 insertions(+)
 create mode 100644 game/battle/battle.gd
 create mode 100644 game/battle/battle.gd.uid
 create mode 100644 game/battle/battle_action.gd
 create mode 100644 game/battle/battle_action.gd.uid
 create mode 100644 game/battle/battle_ai.gd
 create mode 100644 game/battle/battle_ai.gd.uid
 create mode 100644 game/battle/battle_controller.gd
 create mode 100644 game/battle/battle_controller.gd.uid
 create mode 100644 game/battle/battle_debug.gd
 create mode 100644 game/battle/battle_debug.gd.uid
 create mode 100644 game/battle/battle_event.gd
 create mode 100644 game/battle/battle_event.gd.uid
 create mode 100644 game/battle/battle_mon.gd
 create mode 100644 game/battle/battle_mon.gd.uid
 create mode 100644 game/battle/battle_participant.gd
 create mode 100644 game/battle/battle_participant.gd.uid
 create mode 100644 game/battle/battle_presenter.gd
 create mode 100644 game/battle/battle_presenter.gd.uid
 create mode 100644 game/battle/battle_print_presenter.gd
 create mode 100644 game/battle/battle_print_presenter.gd.uid
 create mode 100644 game/battle/battle_setup.gd
 create mode 100644 game/battle/battle_setup.gd.uid
 create mode 100644 game/battle/battle_slot.gd
 create mode 100644 game/battle/battle_slot.gd.uid
 create mode 100644 game/battle/damage_calculator.gd
 create mode 100644 game/battle/damage_calculator.gd.uid
 create mode 100644 game/battle/target_resolver.gd
 create mode 100644 game/battle/target_resolver.gd.uid
 create mode 100644 game/battle/type_chart.gd
 create mode 100644 game/battle/type_chart.gd.uid
 create mode 100644 game/world/battle.tscn

diff --git a/game/battle/battle.gd b/game/battle/battle.gd
new file mode 100644
index 0000000..46004af
--- /dev/null
+++ b/game/battle/battle.gd
@@ -0,0 +1,297 @@
+class_name Battle
+extends RefCounted
+
+#moteur de combat au tour par tour, sans aucun visuel.
+#gere n emplacements par camp (1v1, 2v2, 1 contre plusieurs, plusieurs contre 1).
+#
+#usage :
+#	var battle := Battle.new(setup, mon_presenter)
+#	var outcome : Battle.Outcome = await battle.run()
+#
+#a chaque evenement, la presentation est appelee et le combat attend qu'elle ait fini.
+
+signal event_emitted(event : BattleEvent)
+
+enum Outcome { NONE, PLAYER_WON, PLAYER_LOST, FLED }
+
+const PLAYER_SIDE : int = 0
+
+static var _struggle : MoveData = null
+
+var setup : BattleSetup
+var presenter : BattlePresenter
+var rng : RandomNumberGenerator = RandomNumberGenerator.new()
+var turn : int = 0
+var outcome : Outcome = Outcome.NONE
+var slots : Array[BattleSlot] = []
+
+func _init(p_setup : BattleSetup, p_presenter : BattlePresenter = null) -> void:
+	setup = p_setup
+	presenter = p_presenter
+	if setup.seed_value != 0: rng.seed = setup.seed_value
+	else: rng.randomize()
+	_build_slots()
+
+func _build_slots() -> void:
+	var per_side_count : Dictionary = {}
+	for participant in setup.participants:
+		for pokemon in participant.pick_starters():
+			var slot := BattleSlot.new()
+			slot.id = slots.size()
+			slot.side = participant.side
+			slot.index = int(per_side_count.get(participant.side, 0))
+			per_side_count[participant.side] = slot.index + 1
+			slot.participant = participant
+			slot.set_pokemon(pokemon)
+			slots.append(slot)
+
+#---------- boucle principale ----------
+
+func run() -> Outcome:
+	await _emit(BattleEvent.make(BattleEvent.Type.BATTLE_START))
+	for slot in slots:
+		await _emit(BattleEvent.make(BattleEvent.Type.SENT_OUT, slot))
+	
+	if _check_end():
+		return await _finish()
+	
+	while outcome == Outcome.NONE:
+		turn += 1
+		var turn_event := BattleEvent.make(BattleEvent.Type.TURN_START)
+		turn_event.amount = turn
+		await _emit(turn_event)
+		
+		var actions : Array[BattleAction] = await _collect_actions()
+		_sort_actions(actions)
+		for action in actions:
+			await _execute(action)
+			if _check_end(): break
+		if outcome != Outcome.NONE: break
+		
+		await _replace_fainted()
+		if _check_end(): break
+	
+	return await _finish()
+
+func _finish() -> Outcome:
+	var end_event := BattleEvent.make(BattleEvent.Type.BATTLE_END)
+	match outcome:
+		Outcome.PLAYER_WON: end_event.text = "Victoire !"
+		Outcome.PLAYER_LOST: end_event.text = "Défaite..."
+		Outcome.FLED: end_event.text = "Vous avez pris la fuite."
+	await _emit(end_event)
+	return outcome
+
+func _emit(event : BattleEvent) -> void:
+	event_emitted.emit(event)
+	if presenter != null:
+		await presenter.present(event)
+
+func _msg(text : String) -> void:
+	var e := BattleEvent.make(BattleEvent.Type.MESSAGE)
+	e.text = text
+	await _emit(e)
+
+#---------- fin de combat ----------
+
+func _side_alive(side : int) -> bool:
+	for participant in setup.participants:
+		if participant.side == side and participant.has_able_pokemon(): return true
+	return false
+
+func _check_end() -> bool:
+	if outcome != Outcome.NONE: return true
+	var player_alive : bool = _side_alive(PLAYER_SIDE)
+	var enemy_alive : bool = _side_alive(1 - PLAYER_SIDE)
+	if player_alive and enemy_alive: return false
+	outcome = Outcome.PLAYER_WON if player_alive else Outcome.PLAYER_LOST
+	return true
+
+#---------- actions du tour ----------
+
+func _collect_actions() -> Array[BattleAction]:
+	var actions : Array[BattleAction] = []
+	for slot in slots:
+		if !slot.is_active(): continue
+		var action : BattleAction = await slot.participant.controller.choose_action(self, slot)
+		if action == null: action = BattleAction.use_struggle(slot) #securite : un controleur qui ne decide rien
+		actions.append(action)
+	return actions
+
+func _sort_actions(actions : Array[BattleAction]) -> void:
+	for a in actions:
+		match a.type:
+			BattleAction.Type.FLEE: a.priority = 8
+			BattleAction.Type.SWITCH: a.priority = 7
+			BattleAction.Type.ITEM: a.priority = 6
+			_: a.priority = a.move.priority if a.move else 0
+		a.speed = a.slot.mon.get_stat(PokemonNature.Stat.SPEED)
+		a.tiebreak = rng.randf()
+	
+	actions.sort_custom(func(a : BattleAction, b : BattleAction) -> bool:
+		if a.priority != b.priority: return a.priority > b.priority
+		if a.speed != b.speed: return a.speed > b.speed
+		return a.tiebreak > b.tiebreak)
+
+func _execute(action : BattleAction) -> void:
+	if !action.slot.is_active(): return #mis K.O. avant son tour
+	match action.type:
+		BattleAction.Type.MOVE: await _execute_move(action)
+		BattleAction.Type.SWITCH: await _execute_switch(action)
+		BattleAction.Type.FLEE: await _execute_flee(action)
+
+func _execute_flee(action : BattleAction) -> void:
+	if setup.can_flee and action.slot.side == PLAYER_SIDE:
+		outcome = Outcome.FLED
+		await _emit(BattleEvent.make(BattleEvent.Type.FLED, action.slot))
+	else:
+		await _msg("Impossible de fuir !")
+
+func _execute_switch(action : BattleAction) -> void:
+	var slot : BattleSlot = action.slot
+	if !get_replacement_options(slot).has(action.switch_to): return
+	await _emit(BattleEvent.make(BattleEvent.Type.WITHDRAWN, slot))
+	slot.set_pokemon(action.switch_to)
+	await _emit(BattleEvent.make(BattleEvent.Type.SENT_OUT, slot))
+
+func _execute_move(action : BattleAction) -> void:
+	var actor : BattleSlot = action.slot
+	var move : MoveData = action.move
+	
+	if action.move_slot != null:
+		if !action.move_slot.use():
+			await _msg("%s n'a plus de PP pour cette capacité !" % actor.mon.display_name())
+			return
+	
+	var used := BattleEvent.make(BattleEvent.Type.MOVE_USED, actor)
+	used.move = move
+	await _emit(used)
+	
+	var targets : Array[BattleSlot] = TargetResolver.resolve(self, actor, move, action.chosen_target)
+	if targets.is_empty():
+		await _msg("Mais cela échoue !")
+		return
+	
+	var spread : bool = targets.size() > 1
+	var status_message_shown : bool = false
+	
+	for target in targets:
+		if !target.is_active(): continue
+		
+		if move.power <= 0 or move.category == "status":
+			#les effets des capacites de statut ne sont pas encore implementes
+			if !status_message_shown:
+				status_message_shown = true
+				await _msg("Mais cela n'a pas d'effet pour l'instant.")
+			continue
+		
+		if !_hits(move):
+			await _emit(BattleEvent.make(BattleEvent.Type.MOVE_MISSED, actor, target))
+			continue
+		
+		var calc : Dictionary = DamageCalculator.calculate(actor.mon, target.mon, move, rng, spread)
+		var effectiveness : float = calc["effectiveness"]
+		if effectiveness == 0.0:
+			await _emit(BattleEvent.make(BattleEvent.Type.NO_EFFECT, actor, target))
+			continue
+		
+		await _apply_damage(actor, target, int(calc["damage"]))
+		if calc["critical"]: await _emit(BattleEvent.make(BattleEvent.Type.CRITICAL, actor, target))
+		if effectiveness > 1.0: await _emit(BattleEvent.make(BattleEvent.Type.SUPER_EFFECTIVE, actor, target))
+		elif effectiveness < 1.0: await _emit(BattleEvent.make(BattleEvent.Type.NOT_VERY_EFFECTIVE, actor, target))
+		if target.mon.is_fainted(): await _emit(BattleEvent.make(BattleEvent.Type.FAINTED, target))
+		
+		if _check_end(): return
+	
+	#Lutte : contrecoup pour l'utilisateur
+	if move.api_name == "struggle" and actor.mon != null and !actor.mon.is_fainted():
+		var recoil : int = maxi(1, floori(actor.mon.pokemon.get_max_hp() / 4.0))
+		await _apply_damage(actor, actor, recoil)
+		if actor.mon.is_fainted(): await _emit(BattleEvent.make(BattleEvent.Type.FAINTED, actor))
+
+func _apply_damage(source : BattleSlot, target : BattleSlot, amount : int) -> void:
+	var before : int = target.mon.pokemon.current_hp
+	target.mon.pokemon.take_damage(amount)
+	var event := BattleEvent.make(BattleEvent.Type.DAMAGE, source, target)
+	event.amount = before - target.mon.pokemon.current_hp
+	event.hp = target.mon.pokemon.current_hp
+	event.max_hp = target.mon.pokemon.get_max_hp()
+	await _emit(event)
+
+func _hits(move : MoveData) -> bool:
+	#precision 0 = ne rate jamais (valeur PokeAPI "null")
+	return move.accuracy <= 0 or rng.randi_range(1, 100) <= move.accuracy
+
+#---------- remplacements ----------
+
+func _replace_fainted() -> void:
+	for slot in slots:
+		if slot.mon == null or !slot.mon.is_fainted(): continue
+		
+		var options : Array[PokemonInstance] = get_replacement_options(slot)
+		if options.is_empty():
+			slot.clear() #plus de remplacant : l'emplacement reste vide
+			continue
+		
+		var chosen : PokemonInstance = await slot.participant.controller.choose_replacement(self, slot)
+		if chosen == null or !options.has(chosen): chosen = options[0]
+		slot.set_pokemon(chosen)
+		await _emit(BattleEvent.make(BattleEvent.Type.SENT_OUT, slot))
+
+#---------- requetes (utilisees par les controleurs et TargetResolver) ----------
+
+func get_slot(id : int) -> BattleSlot:
+	return slots[id] if id >= 0 and id < slots.size() else null
+
+func get_active_slots() -> Array[BattleSlot]:
+	var result : Array[BattleSlot] = []
+	for s in slots:
+		if s.is_active(): result.append(s)
+	return result
+
+func get_opponents(slot : BattleSlot) -> Array[BattleSlot]:
+	var result : Array[BattleSlot] = []
+	for s in slots:
+		if s.is_active() and s.side != slot.side: result.append(s)
+	return result
+
+func get_allies(slot : BattleSlot) -> Array[BattleSlot]:
+	var result : Array[BattleSlot] = []
+	for s in slots:
+		if s.is_active() and s.side == slot.side and s != slot: result.append(s)
+	return result
+
+func get_usable_moves(mon : BattleMon) -> Array[MoveSlot]:
+	var result : Array[MoveSlot] = []
+	for ms in mon.pokemon.active_moves:
+		if ms.has_pp(): result.append(ms)
+	return result
+
+func get_replacement_options(slot : BattleSlot) -> Array[PokemonInstance]:
+	#pokemon aptes de l'equipe du participant qui ne sont pas deja en jeu
+	var result : Array[PokemonInstance] = []
+	for p in slot.participant.team.members:
+		if p.is_fainted() or _is_in_play(p): continue
+		result.append(p)
+	return result
+
+func _is_in_play(pokemon : PokemonInstance) -> bool:
+	for s in slots:
+		if s.mon != null and s.mon.pokemon == pokemon: return true
+	return false
+
+#---------- Lutte ----------
+
+static func make_struggle() -> MoveData:
+	if _struggle == null:
+		_struggle = MoveData.new()
+		_struggle.api_name = "struggle"
+		_struggle.names = {"fr": "Lutte", "en": "Struggle"}
+		_struggle.type = "typeless"
+		_struggle.category = "physical"
+		_struggle.power = 50
+		_struggle.accuracy = 0
+		_struggle.pp = 1
+		_struggle.priority = 0
+		_struggle.target = "random-opponent"
+	return _struggle
diff --git a/game/battle/battle.gd.uid b/game/battle/battle.gd.uid
new file mode 100644
index 0000000..d46c8bb
--- /dev/null
+++ b/game/battle/battle.gd.uid
@@ -0,0 +1 @@
+uid://jqtd5v08rwtv
diff --git a/game/battle/battle_action.gd b/game/battle/battle_action.gd
new file mode 100644
index 0000000..8631838
--- /dev/null
+++ b/game/battle/battle_action.gd
@@ -0,0 +1,48 @@
+class_name BattleAction
+extends RefCounted
+
+#ce qu'un emplacement choisit de faire pendant un tour
+
+enum Type { MOVE, SWITCH, ITEM, FLEE }
+
+var type : Type = Type.MOVE
+var slot : BattleSlot #qui agit
+var move : MoveData
+var move_slot : MoveSlot #null pour Lutte
+var chosen_target : BattleSlot = null #cible choisie (null = automatique)
+var switch_to : PokemonInstance
+
+#calcules par Battle au moment de trier les actions
+var priority : int = 0
+var speed : float = 0.0
+var tiebreak : float = 0.0
+
+static func use_move(p_slot : BattleSlot, p_move_slot : MoveSlot, p_target : BattleSlot = null) -> BattleAction:
+	var a := BattleAction.new()
+	a.type = Type.MOVE
+	a.slot = p_slot
+	a.move_slot = p_move_slot
+	a.move = p_move_slot.move
+	a.chosen_target = p_target
+	return a
+
+static func use_struggle(p_slot : BattleSlot) -> BattleAction:
+	#plus aucune capacite utilisable : Lutte
+	var a := BattleAction.new()
+	a.type = Type.MOVE
+	a.slot = p_slot
+	a.move = Battle.make_struggle()
+	return a
+
+static func switch_pokemon(p_slot : BattleSlot, p_pokemon : PokemonInstance) -> BattleAction:
+	var a := BattleAction.new()
+	a.type = Type.SWITCH
+	a.slot = p_slot
+	a.switch_to = p_pokemon
+	return a
+
+static func flee(p_slot : BattleSlot) -> BattleAction:
+	var a := BattleAction.new()
+	a.type = Type.FLEE
+	a.slot = p_slot
+	return a
diff --git a/game/battle/battle_action.gd.uid b/game/battle/battle_action.gd.uid
new file mode 100644
index 0000000..8539461
--- /dev/null
+++ b/game/battle/battle_action.gd.uid
@@ -0,0 +1 @@
+uid://hispkfk8qdt6
diff --git a/game/battle/battle_ai.gd b/game/battle/battle_ai.gd
new file mode 100644
index 0000000..ec1a735
--- /dev/null
+++ b/game/battle/battle_ai.gd
@@ -0,0 +1,143 @@
+class_name BattleAI
+extends BattleController
+
+#IA simple :
+#- attaque : choisit la capacite et la cible qui font le plus de degats attendus
+#  (achever un adversaire est favorise, taper un allie est penalise)
+#- changement volontaire : si son pokemon est tres desavantage (types) et a peu de PV, elle peut
+#  le remplacer par un pokemon du banc qui a un meilleur rapport de types face aux adversaires
+
+var randomness : float = 0.15 #chance de jouer un coup au hasard, pour ne pas etre previsible
+
+var can_switch : bool = true #false : ne change jamais volontairement (ex. un pokemon sauvage n'a de toute facon pas de banc)
+var switch_chance : float = 0.6 #quand les conditions sont reunies, probabilite de vraiment changer
+var hp_threshold : float = 0.4 #ne change que si ses PV sont sous ce ratio
+var matchup_threshold : float = -1.0 #ne change que si le rapport de types est pire que cette valeur
+var min_improvement : float = 1.0 #le remplacant doit etre meilleur d'au moins cette valeur
+var min_replacement_hp : float = 0.3 #ne fait pas entrer un pokemon quasi K.O.
+
+const KILL_SCORE : float = 20.0 #bonus de score d'une attaque qui acheve un adversaire (cf. _score)
+
+var _claimed : Array[PokemonInstance] = [] #remplacants deja choisis ce tour (evite 2 emplacements sur le meme)
+var _claimed_turn : int = -1
+
+func choose_action(battle : Battle, slot : BattleSlot) -> BattleAction:
+	if _claimed_turn != battle.turn:
+		_claimed.clear()
+		_claimed_turn = battle.turn
+	
+	var usable : Array[MoveSlot] = battle.get_usable_moves(slot.mon)
+	
+	#options d'attaque = [MoveSlot, cible (BattleSlot ou null), score]
+	var options : Array = []
+	for move_slot in usable:
+		var move : MoveData = move_slot.move
+		var candidates : Array = [null]
+		if TargetResolver.needs_selection(battle, slot, move):
+			candidates = TargetResolver.get_selectable_targets(battle, slot, move)
+		for candidate in candidates:
+			options.append([move_slot, candidate, _score(battle, slot, move, candidate) + battle.rng.randf() * 0.01])
+	
+	var best : Array = []
+	for option in options:
+		if best.is_empty() or option[2] > best[2]: best = option
+	
+	#changement volontaire ?
+	var best_score : float = best[2] if !best.is_empty() else -1.0
+	var swap : BattleAction = _consider_switch(battle, slot, best_score, usable.is_empty())
+	if swap != null: return swap
+	
+	if options.is_empty(): return BattleAction.use_struggle(slot)
+	
+	var chosen : Array = options.pick_random() if battle.rng.randf() < randomness else best
+	return BattleAction.use_move(slot, chosen[0], chosen[1])
+
+func choose_replacement(battle : Battle, slot : BattleSlot) -> PokemonInstance:
+	#remplacement force (pokemon K.O.) : le meilleur rapport de types face aux adversaires
+	var options : Array[PokemonInstance] = battle.get_replacement_options(slot)
+	if options.is_empty(): return null
+	var opponents : Array[BattleSlot] = battle.get_opponents(slot)
+	var best : PokemonInstance = options[0]
+	var best_value : float = -INF
+	for p in options:
+		var value : float = _matchup(_types_of(p), opponents)
+		if value > best_value:
+			best = p
+			best_value = value
+	return best
+
+#---------- changement volontaire ----------
+
+func _consider_switch(battle : Battle, slot : BattleSlot, best_attack_score : float, no_usable_move : bool) -> BattleAction:
+	if !can_switch: return null
+	
+	var bench : Array[PokemonInstance] = []
+	for p in battle.get_replacement_options(slot):
+		if !_claimed.has(p): bench.append(p)
+	if bench.is_empty(): return null
+	
+	var opponents : Array[BattleSlot] = battle.get_opponents(slot)
+	var current : float = _matchup(slot.mon.get_types(), opponents)
+	
+	if !no_usable_move:
+		if best_attack_score >= KILL_SCORE: return null #peut achever un adversaire : on attaque
+		var hp_ratio : float = float(slot.mon.pokemon.current_hp) / float(slot.mon.pokemon.get_max_hp())
+		if hp_ratio > hp_threshold or current > matchup_threshold: return null
+		if battle.rng.randf() > switch_chance: return null
+	
+	var best : PokemonInstance = null
+	var best_value : float = -INF
+	for p in bench:
+		if !no_usable_move and float(p.current_hp) / float(p.get_max_hp()) < min_replacement_hp: continue
+		var value : float = _matchup(_types_of(p), opponents)
+		if value > best_value:
+			best = p
+			best_value = value
+	if best == null: return null
+	if !no_usable_move and best_value < current + min_improvement: return null
+	
+	_claimed.append(best)
+	return BattleAction.switch_pokemon(slot, best)
+
+func _matchup(my_types : Array[String], opponents : Array[BattleSlot]) -> float:
+	#rapport de types moyen face aux adversaires : (meilleure efficacite offensive) - (meilleure efficacite defensive subie)
+	#positif = avantage, negatif = desavantage
+	if opponents.is_empty(): return 0.0
+	var total : float = 0.0
+	for opponent in opponents:
+		var their_types : Array[String] = opponent.mon.get_types()
+		var offense : float = 0.0
+		for t in my_types:
+			offense = maxf(offense, TypeChart.get_multiplier(t, their_types))
+		var defense : float = 0.0
+		for t in their_types:
+			defense = maxf(defense, TypeChart.get_multiplier(t, my_types))
+		total += offense - defense
+	return total / opponents.size()
+
+func _types_of(pokemon : PokemonInstance) -> Array[String]:
+	var result : Array[String] = []
+	for t in pokemon.species.types:
+		result.append(TypeChart.type_name(t))
+	return result
+
+#---------- attaque ----------
+
+func _score(battle : Battle, slot : BattleSlot, move : MoveData, candidate : Variant) -> float:
+	var targets : Array[BattleSlot] = TargetResolver.resolve(battle, slot, move, candidate)
+	if targets.is_empty(): return -1.0
+	if move.power <= 0 or move.category == "status": return 0.1 #pas d'effet implemente : dernier recours
+	
+	var accuracy : float = 1.0 if move.accuracy <= 0 else move.accuracy / 100.0
+	var spread : bool = targets.size() > 1
+	var score : float = 0.0
+	for t in targets:
+		var damage : int = DamageCalculator.estimate(slot.mon, t.mon, move, spread)
+		var remaining : int = t.mon.pokemon.current_hp
+		var value : float = float(mini(damage, remaining)) * accuracy
+		if t.side == slot.side:
+			score -= value
+		else:
+			score += value
+			if damage >= remaining: score += KILL_SCORE
+	return score
diff --git a/game/battle/battle_ai.gd.uid b/game/battle/battle_ai.gd.uid
new file mode 100644
index 0000000..97c04be
--- /dev/null
+++ b/game/battle/battle_ai.gd.uid
@@ -0,0 +1 @@
+uid://dbkfxdanlrke1
diff --git a/game/battle/battle_controller.gd b/game/battle/battle_controller.gd
new file mode 100644
index 0000000..edb557a
--- /dev/null
+++ b/game/battle/battle_controller.gd
@@ -0,0 +1,11 @@
+class_name BattleController
+extends RefCounted
+
+#decide pour un participant : IA (BattleAI) ou joueur (menus, a venir).
+#les deux fonctions peuvent utiliser "await" (le joueur attend un choix dans l'interface).
+
+func choose_action(_battle : Battle, _slot : BattleSlot) -> BattleAction:
+	return null
+
+func choose_replacement(_battle : Battle, _slot : BattleSlot) -> PokemonInstance:
+	return null
diff --git a/game/battle/battle_controller.gd.uid b/game/battle/battle_controller.gd.uid
new file mode 100644
index 0000000..8170771
--- /dev/null
+++ b/game/battle/battle_controller.gd.uid
@@ -0,0 +1 @@
+uid://cw4o36nfqrbh8
diff --git a/game/battle/battle_debug.gd b/game/battle/battle_debug.gd
new file mode 100644
index 0000000..026c47d
--- /dev/null
+++ b/game/battle/battle_debug.gd
@@ -0,0 +1,49 @@
+class_name BattleDebug
+extends Node
+
+#banc d'essai : simule un combat complet IA contre IA et ecrit tout dans la console.
+#ajoute ce node a une scene, regle le format dans l'inspecteur, lance la scene.
+#utilise des equipes aleatoires (par defaut) : n'abime pas ton equipe de jeu.
+
+@export var run_on_ready : bool = true
+@export_range(1, 3) var player_slots : int = 1 #emplacements du joueur
+@export_range(1, 5) var enemy_count : int = 1 #nombre d'adversaires (chacun est un participant)
+@export_range(1, 3) var enemy_slots_each : int = 1 #emplacements de chaque adversaire
+@export_range(1, 6) var team_size : int = 3
+@export_range(1, 100) var level : int = 10
+@export var use_game_team : bool = false #true : utilise GameData.player_team (qui sera modifiee !)
+
+func _ready() -> void:
+	if run_on_ready:
+		await get_tree().create_timer(0.5).timeout
+		run_test()
+
+func run_test() -> void:
+	var player_team : PokemonTeam = GameData.player_team if use_game_team else _random_team(maxi(team_size, player_slots))
+	
+	var setup := BattleSetup.new()
+	setup.add(BattleSetup.player_participant(player_team, player_slots, null, BattleAI.new()))
+	for i in enemy_count:
+		var team : PokemonTeam = _random_team(enemy_slots_each + 1)
+		var participant := BattleParticipant.new("Adversaire %d" % (i + 1), team, 1, BattleAI.new(), enemy_slots_each)
+		setup.add(participant)
+	
+	if !setup.is_valid():
+		push_error("BattleDebug : combat invalide (une equipe n'a aucun pokemon apte)")
+		return
+	
+	print("===== Combat : %d contre %d =====" % [player_slots, enemy_count * enemy_slots_each])
+	var battle := Battle.new(setup, BattlePrintPresenter.new())
+	var outcome : Battle.Outcome = await battle.run()
+	print("===== Resultat : %s apres %d tours =====" % [Battle.Outcome.keys()[outcome], battle.turn])
+
+func _random_team(size : int) -> PokemonTeam:
+	var team := PokemonTeam.new()
+	var ids : Array = Pokedex.all_ids()
+	if ids.is_empty():
+		push_error("BattleDebug : le Pokedex ne contient aucun pokemon")
+		return team
+	for i in size:
+		var species : PokemonData = Pokedex.get_pokemon(ids.pick_random())
+		if species: team.add_pokemon(PokemonInstance.create(species, level))
+	return team
diff --git a/game/battle/battle_debug.gd.uid b/game/battle/battle_debug.gd.uid
new file mode 100644
index 0000000..ebd1267
--- /dev/null
+++ b/game/battle/battle_debug.gd.uid
@@ -0,0 +1 @@
+uid://ulemh0n2lfft
diff --git a/game/battle/battle_event.gd b/game/battle/battle_event.gd
new file mode 100644
index 0000000..ca3aa79
--- /dev/null
+++ b/game/battle/battle_event.gd
@@ -0,0 +1,55 @@
+class_name BattleEvent
+extends RefCounted
+
+#ce qui se passe pendant un combat. La logique les emet ; la presentation (texte, animations 3D,
+#barres de PV) les lit un par un. Les emplacements sont identifies par leur id.
+
+enum Type {
+	BATTLE_START, BATTLE_END, TURN_START,
+	SENT_OUT, WITHDRAWN,
+	MOVE_USED, MOVE_MISSED, DAMAGE, CRITICAL,
+	SUPER_EFFECTIVE, NOT_VERY_EFFECTIVE, NO_EFFECT,
+	FAINTED, FLED, MESSAGE,
+}
+
+var type : Type = Type.MESSAGE
+var source_slot : int = -1
+var target_slot : int = -1
+var source_name : String = ""
+var target_name : String = ""
+var move : MoveData = null
+var amount : int = 0 #degats, numero de tour...
+var hp : int = 0 #PV restants de la cible
+var max_hp : int = 0
+var text : String = ""
+
+static func make(p_type : Type, p_source : BattleSlot = null, p_target : BattleSlot = null) -> BattleEvent:
+	var e := BattleEvent.new()
+	e.type = p_type
+	if p_source != null:
+		e.source_slot = p_source.id
+		if p_source.mon != null: e.source_name = p_source.mon.display_name()
+	if p_target != null:
+		e.target_slot = p_target.id
+		if p_target.mon != null: e.target_name = p_target.mon.display_name()
+	return e
+
+func describe() -> String:
+	#texte par defaut (boite de dialogue, journal de debug)
+	match type:
+		Type.BATTLE_START: return "Le combat commence !"
+		Type.BATTLE_END: return text
+		Type.TURN_START: return "— Tour %d —" % amount
+		Type.SENT_OUT: return "%s entre en combat !" % source_name
+		Type.WITHDRAWN: return "%s est rappelé !" % source_name
+		Type.MOVE_USED: return "%s utilise %s !" % [source_name, move.get_display_name() if move else "?"]
+		Type.MOVE_MISSED: return "%s évite l'attaque !" % target_name
+		Type.DAMAGE: return "%s perd %d PV (%d/%d)" % [target_name, amount, hp, max_hp]
+		Type.CRITICAL: return "Coup critique !"
+		Type.SUPER_EFFECTIVE: return "C'est super efficace !"
+		Type.NOT_VERY_EFFECTIVE: return "Ce n'est pas très efficace..."
+		Type.NO_EFFECT: return "Ça n'affecte pas %s..." % target_name
+		Type.FAINTED: return "%s est K.O. !" % source_name
+		Type.FLED: return "Vous prenez la fuite !"
+		Type.MESSAGE: return text
+	return ""
diff --git a/game/battle/battle_event.gd.uid b/game/battle/battle_event.gd.uid
new file mode 100644
index 0000000..4103835
--- /dev/null
+++ b/game/battle/battle_event.gd.uid
@@ -0,0 +1 @@
+uid://dxdhsdh0y2fxr
diff --git a/game/battle/battle_mon.gd b/game/battle/battle_mon.gd
new file mode 100644
index 0000000..2a38594
--- /dev/null
+++ b/game/battle/battle_mon.gd
@@ -0,0 +1,33 @@
+class_name BattleMon
+extends RefCounted
+
+#un pokemon en combat : enveloppe autour du PokemonInstance qui porte l'etat TEMPORAIRE du combat.
+#les PV et le K.O. s'appliquent directement au PokemonInstance (ils persistent apres le combat).
+
+var pokemon : PokemonInstance
+var slot_id : int = -1
+var stages : Dictionary = {} #PokemonNature.Stat -> -6..6 (boosts/malus ; appliques par les effets, V2)
+
+func _init(p_pokemon : PokemonInstance) -> void:
+	pokemon = p_pokemon
+
+func display_name() -> String:
+	return pokemon.get_display_name()
+
+func is_fainted() -> bool:
+	return pokemon.is_fainted()
+
+func get_types() -> Array[String]:
+	var result : Array[String] = []
+	for t in pokemon.species.types:
+		result.append(TypeChart.type_name(t))
+	return result
+
+func get_stage(stat : PokemonNature.Stat) -> int:
+	return int(stages.get(stat, 0))
+
+func get_stat(stat : PokemonNature.Stat) -> float:
+	#stat effective = stat du pokemon x multiplicateur de boost
+	var stage : int = get_stage(stat)
+	var multiplier : float = (2.0 + stage) / 2.0 if stage >= 0 else 2.0 / (2.0 - stage)
+	return pokemon.get_stat(stat) * multiplier
diff --git a/game/battle/battle_mon.gd.uid b/game/battle/battle_mon.gd.uid
new file mode 100644
index 0000000..af5342a
--- /dev/null
+++ b/game/battle/battle_mon.gd.uid
@@ -0,0 +1 @@
+uid://5ja6agfwkfku
diff --git a/game/battle/battle_participant.gd b/game/battle/battle_participant.gd
new file mode 100644
index 0000000..219c221
--- /dev/null
+++ b/game/battle/battle_participant.gd
@@ -0,0 +1,36 @@
+class_name BattleParticipant
+extends RefCounted
+
+#qui prend part au combat : joueur, dresseur ou pokemon sauvage.
+#il possede une equipe (le "banc"), un controleur, et pilote slot_count emplacements.
+
+var name : String = ""
+var team : PokemonTeam
+var side : int = 0
+var slot_count : int = 1
+var controller : BattleController
+var lead : Array[PokemonInstance] = [] #pokemon a envoyer en premier (ex. celui lance par le joueur)
+var is_player : bool = false
+
+func _init(p_name : String, p_team : PokemonTeam, p_side : int, p_controller : BattleController = null, p_slot_count : int = 1) -> void:
+	name = p_name
+	team = p_team
+	side = p_side
+	slot_count = maxi(p_slot_count, 1)
+	controller = p_controller if p_controller != null else BattleAI.new()
+
+func pick_starters() -> Array[PokemonInstance]:
+	#d'abord les "lead" (aptes), puis l'ordre de l'equipe, jusqu'a slot_count
+	var result : Array[PokemonInstance] = []
+	for p in lead:
+		if result.size() >= slot_count: break
+		if p != null and !p.is_fainted() and team.members.has(p) and !result.has(p):
+			result.append(p)
+	for p in team.members:
+		if result.size() >= slot_count: break
+		if !p.is_fainted() and !result.has(p):
+			result.append(p)
+	return result
+
+func has_able_pokemon() -> bool:
+	return team.has_able_pokemon()
diff --git a/game/battle/battle_participant.gd.uid b/game/battle/battle_participant.gd.uid
new file mode 100644
index 0000000..160ee26
--- /dev/null
+++ b/game/battle/battle_participant.gd.uid
@@ -0,0 +1 @@
+uid://sxqh5bfin87t
diff --git a/game/battle/battle_presenter.gd b/game/battle/battle_presenter.gd
new file mode 100644
index 0000000..c9fd3fb
--- /dev/null
+++ b/game/battle/battle_presenter.gd
@@ -0,0 +1,8 @@
+class_name BattlePresenter
+extends RefCounted
+
+#la presentation d'un combat (texte, animations 3D, barres de PV...) herite de cette classe.
+#present() peut utiliser "await" : le combat attend la fin de l'animation avant l'evenement suivant.
+
+func present(_event : BattleEvent) -> void:
+	pass
diff --git a/game/battle/battle_presenter.gd.uid b/game/battle/battle_presenter.gd.uid
new file mode 100644
index 0000000..681102b
--- /dev/null
+++ b/game/battle/battle_presenter.gd.uid
@@ -0,0 +1 @@
+uid://c1ibvn41p4rxv
diff --git a/game/battle/battle_print_presenter.gd b/game/battle/battle_print_presenter.gd
new file mode 100644
index 0000000..dddd72e
--- /dev/null
+++ b/game/battle/battle_print_presenter.gd
@@ -0,0 +1,8 @@
+class_name BattlePrintPresenter
+extends BattlePresenter
+
+#presentation de debug : ecrit les evenements dans la console
+
+func present(event : BattleEvent) -> void:
+	var line : String = event.describe()
+	if line != "": print(line)
diff --git a/game/battle/battle_print_presenter.gd.uid b/game/battle/battle_print_presenter.gd.uid
new file mode 100644
index 0000000..55438c4
--- /dev/null
+++ b/game/battle/battle_print_presenter.gd.uid
@@ -0,0 +1 @@
+uid://ddehrcr54nu2i
diff --git a/game/battle/battle_setup.gd b/game/battle/battle_setup.gd
new file mode 100644
index 0000000..3f2c3b0
--- /dev/null
+++ b/game/battle/battle_setup.gd
@@ -0,0 +1,38 @@
+class_name BattleSetup
+extends RefCounted
+
+#description complete d'un combat, construite par le monde avant de le lancer.
+#le format (1v1, 2v2, 1 contre plusieurs, plusieurs contre 1) vient simplement du nombre
+#de participants par camp et du nombre d'emplacements (slot_count) de chacun.
+
+var participants : Array[BattleParticipant] = []
+var can_flee : bool = true #false pour un combat de dresseur
+var seed_value : int = 0 #0 = hasard ; autre valeur = combat reproductible (tests)
+
+func add(participant : BattleParticipant) -> BattleSetup:
+	participants.append(participant)
+	return self
+
+func is_valid() -> bool:
+	var sides : Dictionary = {}
+	for p in participants:
+		if p.team != null and p.team.has_able_pokemon(): sides[p.side] = true
+	return sides.has(0) and sides.has(1)
+
+#---------- fabriques ----------
+
+static func player_participant(team : PokemonTeam, slot_count : int = 1, thrown : PokemonInstance = null, controller : BattleController = null) -> BattleParticipant:
+	#joueur qui initie : le pokemon lance passe en premier, puis l'ordre de l'equipe
+	#joueur defie (thrown = null) : l'ordre de l'equipe (le 1er, puis le 2e pour un duo...)
+	var p := BattleParticipant.new("Joueur", team, 0, controller, slot_count)
+	p.is_player = true
+	if thrown != null: p.lead.append(thrown)
+	return p
+
+static func wild_participant(pokemon : PokemonInstance, controller : BattleController = null) -> BattleParticipant:
+	var team := PokemonTeam.new()
+	team.add_pokemon(pokemon)
+	return BattleParticipant.new(pokemon.get_display_name(), team, 1, controller, 1)
+
+static func trainer_participant(trainer : TrainerData, slot_count : int = 1, controller : BattleController = null) -> BattleParticipant:
+	return BattleParticipant.new(trainer.get_display_name(), trainer.create_team(), 1, controller, slot_count)
diff --git a/game/battle/battle_setup.gd.uid b/game/battle/battle_setup.gd.uid
new file mode 100644
index 0000000..69a6253
--- /dev/null
+++ b/game/battle/battle_setup.gd.uid
@@ -0,0 +1 @@
+uid://wmyjd47h18dh
diff --git a/game/battle/battle_slot.gd b/game/battle/battle_slot.gd
new file mode 100644
index 0000000..61fd5b9
--- /dev/null
+++ b/game/battle/battle_slot.gd
@@ -0,0 +1,25 @@
+class_name BattleSlot
+extends RefCounted
+
+#un emplacement actif sur le terrain. Contient un BattleMon ou reste vide.
+
+var id : int = 0 #unique dans le combat
+var side : int = 0 #0 = camp du joueur, 1 = camp adverse
+var index : int = 0 #position dans son camp (0, 1, 2...)
+var participant : BattleParticipant
+var mon : BattleMon = null
+
+func is_occupied() -> bool:
+	return mon != null
+
+func is_active() -> bool:
+	#occupe par un pokemon encore apte au combat
+	return mon != null and !mon.is_fainted()
+
+func set_pokemon(pokemon : PokemonInstance) -> BattleMon:
+	mon = BattleMon.new(pokemon)
+	mon.slot_id = id
+	return mon
+
+func clear() -> void:
+	mon = null
diff --git a/game/battle/battle_slot.gd.uid b/game/battle/battle_slot.gd.uid
new file mode 100644
index 0000000..4a7907d
--- /dev/null
+++ b/game/battle/battle_slot.gd.uid
@@ -0,0 +1 @@
+uid://daogeyd6po2en
diff --git a/game/battle/damage_calculator.gd b/game/battle/damage_calculator.gd
new file mode 100644
index 0000000..f4bd8b5
--- /dev/null
+++ b/game/battle/damage_calculator.gd
@@ -0,0 +1,40 @@
+class_name DamageCalculator
+extends RefCounted
+
+const CRIT_CHANCE : float = 1.0 / 24.0
+const CRIT_MULTIPLIER : float = 1.5
+const STAB_MULTIPLIER : float = 1.5
+const SPREAD_MULTIPLIER : float = 0.75 #capacite touchant plusieurs cibles
+
+static func calculate(attacker : BattleMon, defender : BattleMon, move : MoveData, rng : RandomNumberGenerator = null, spread : bool = false, deterministic : bool = false) -> Dictionary:
+	#renvoie {"damage": int, "effectiveness": float, "critical": bool}
+	var result : Dictionary = {"damage": 0, "effectiveness": 1.0, "critical": false}
+	if move.power <= 0 or move.category == "status": return result
+	
+	var effectiveness : float = TypeChart.get_multiplier(move.type, defender.get_types())
+	result["effectiveness"] = effectiveness
+	if effectiveness == 0.0: return result
+	
+	var physical : bool = move.category == "physical"
+	var attack : float = attacker.get_stat(PokemonNature.Stat.ATTACK if physical else PokemonNature.Stat.SP_ATTACK)
+	var defense : float = defender.get_stat(PokemonNature.Stat.DEFENSE if physical else PokemonNature.Stat.SP_DEFENSE)
+	var level : int = attacker.pokemon.level
+	
+	#formule officielle
+	var damage : float = floorf(floorf(floorf(2.0 * level / 5.0 + 2.0) * move.power * attack / maxf(defense, 1.0)) / 50.0) + 2.0
+	
+	var critical : bool = !deterministic and rng != null and rng.randf() < CRIT_CHANCE
+	var roll : float = 0.925 if (deterministic or rng == null) else rng.randi_range(85, 100) / 100.0
+	var stab : float = STAB_MULTIPLIER if attacker.get_types().has(move.type.to_lower()) else 1.0
+	
+	damage *= roll * stab * effectiveness
+	if critical: damage *= CRIT_MULTIPLIER
+	if spread: damage *= SPREAD_MULTIPLIER
+	
+	result["critical"] = critical
+	result["damage"] = maxi(1, floori(damage))
+	return result
+
+static func estimate(attacker : BattleMon, defender : BattleMon, move : MoveData, spread : bool = false) -> int:
+	#degats attendus, sans hasard (utilise par l'IA)
+	return int(calculate(attacker, defender, move, null, spread, true)["damage"])
diff --git a/game/battle/damage_calculator.gd.uid b/game/battle/damage_calculator.gd.uid
new file mode 100644
index 0000000..8664bc3
--- /dev/null
+++ b/game/battle/damage_calculator.gd.uid
@@ -0,0 +1 @@
+uid://d2o31jkem2b5l
diff --git a/game/battle/target_resolver.gd b/game/battle/target_resolver.gd
new file mode 100644
index 0000000..99a5289
--- /dev/null
+++ b/game/battle/target_resolver.gd
@@ -0,0 +1,67 @@
+class_name TargetResolver
+extends RefCounted
+
+#convertit MoveData.target (valeurs PokeAPI) + le choix du joueur en liste d'emplacements.
+
+const SELECTABLE : Array[String] = ["selected-pokemon", "selected-pokemon-me-first", "specific-move", "ally", "user-or-ally"]
+
+static func get_target_type(move : MoveData) -> String:
+	return move.target if move.target != "" else "selected-pokemon"
+
+static func get_selectable_targets(battle : Battle, actor : BattleSlot, move : MoveData) -> Array[BattleSlot]:
+	#emplacements parmi lesquels le joueur peut choisir (ordre : par camp puis par position)
+	var result : Array[BattleSlot] = []
+	match get_target_type(move):
+		"ally":
+			result = battle.get_allies(actor)
+		"user-or-ally":
+			result = battle.get_allies(actor)
+			result.append(actor)
+		_:
+			for s in battle.get_active_slots():
+				if s != actor: result.append(s)
+	return result
+
+static func needs_selection(battle : Battle, actor : BattleSlot, move : MoveData) -> bool:
+	#une etape "choisir la cible" n'est utile que s'il y a vraiment un choix
+	return SELECTABLE.has(get_target_type(move)) and get_selectable_targets(battle, actor, move).size() > 1
+
+static func resolve(battle : Battle, actor : BattleSlot, move : MoveData, chosen : BattleSlot) -> Array[BattleSlot]:
+	#liste finale des cibles au moment ou la capacite est utilisee (cible K.O. entre-temps : redirigee)
+	var opponents : Array[BattleSlot] = battle.get_opponents(actor)
+	var allies : Array[BattleSlot] = battle.get_allies(actor)
+	var result : Array[BattleSlot] = []
+	
+	match get_target_type(move):
+		"user":
+			result.append(actor)
+		"all-opponents":
+			result = opponents
+		"random-opponent":
+			if !opponents.is_empty(): result.append(opponents.pick_random())
+		"all-other-pokemon":
+			result.append_array(opponents)
+			result.append_array(allies)
+		"all-pokemon", "entire-field":
+			result.append_array(opponents)
+			result.append_array(allies)
+			result.append(actor)
+		"all-allies", "user-and-allies":
+			result = allies
+			result.append(actor)
+		"ally", "user-or-ally":
+			if chosen != null and chosen.is_active() and (allies.has(chosen) or chosen == actor):
+				result.append(chosen)
+			elif !allies.is_empty():
+				result.append(allies.pick_random())
+			elif get_target_type(move) == "user-or-ally":
+				result.append(actor)
+		"users-field", "opponents-field", "fainting-pokemon":
+			pass #effets de terrain : plus tard
+		_:
+			#cible choisie ; si elle est K.O. ou absente, redirection vers un adversaire au hasard
+			if chosen != null and chosen != actor and chosen.is_active():
+				result.append(chosen)
+			elif !opponents.is_empty():
+				result.append(opponents.pick_random())
+	return result
diff --git a/game/battle/target_resolver.gd.uid b/game/battle/target_resolver.gd.uid
new file mode 100644
index 0000000..d726524
--- /dev/null
+++ b/game/battle/target_resolver.gd.uid
@@ -0,0 +1 @@
+uid://bum2it3yoslcj
diff --git a/game/battle/type_chart.gd b/game/battle/type_chart.gd
new file mode 100644
index 0000000..72cdf4d
--- /dev/null
+++ b/game/battle/type_chart.gd
@@ -0,0 +1,41 @@
+class_name TypeChart
+extends RefCounted
+
+#table d'efficacite des types (generation 6+, avec Fee). Seules les valeurs differentes de 1 sont listees.
+#point de remplacement unique si tu veux la deriver plus tard des TypeData importes.
+
+const CHART : Dictionary = {
+	"normal": {"rock": 0.5, "steel": 0.5, "ghost": 0.0},
+	"fire": {"fire": 0.5, "water": 0.5, "grass": 2.0, "ice": 2.0, "bug": 2.0, "rock": 0.5, "dragon": 0.5, "steel": 2.0},
+	"water": {"fire": 2.0, "water": 0.5, "grass": 0.5, "ground": 2.0, "rock": 2.0, "dragon": 0.5},
+	"electric": {"water": 2.0, "electric": 0.5, "grass": 0.5, "ground": 0.0, "flying": 2.0, "dragon": 0.5},
+	"grass": {"fire": 0.5, "water": 2.0, "grass": 0.5, "poison": 0.5, "ground": 2.0, "flying": 0.5, "bug": 0.5, "rock": 2.0, "dragon": 0.5, "steel": 0.5},
+	"ice": {"fire": 0.5, "water": 0.5, "grass": 2.0, "ice": 0.5, "ground": 2.0, "flying": 2.0, "dragon": 2.0, "steel": 0.5},
+	"fighting": {"normal": 2.0, "ice": 2.0, "poison": 0.5, "flying": 0.5, "psychic": 0.5, "bug": 0.5, "rock": 2.0, "ghost": 0.0, "dark": 2.0, "steel": 2.0, "fairy": 0.5},
+	"poison": {"grass": 2.0, "poison": 0.5, "ground": 0.5, "rock": 0.5, "ghost": 0.5, "steel": 0.0, "fairy": 2.0},
+	"ground": {"fire": 2.0, "electric": 2.0, "grass": 0.5, "poison": 2.0, "flying": 0.0, "bug": 0.5, "rock": 2.0, "steel": 2.0},
+	"flying": {"electric": 0.5, "grass": 2.0, "fighting": 2.0, "bug": 2.0, "rock": 0.5, "steel": 0.5},
+	"psychic": {"fighting": 2.0, "poison": 2.0, "psychic": 0.5, "dark": 0.0, "steel": 0.5},
+	"bug": {"fire": 0.5, "grass": 2.0, "fighting": 0.5, "poison": 0.5, "flying": 0.5, "psychic": 2.0, "ghost": 0.5, "dark": 2.0, "steel": 0.5, "fairy": 0.5},
+	"rock": {"fire": 2.0, "ice": 2.0, "fighting": 0.5, "ground": 0.5, "flying": 2.0, "bug": 2.0, "steel": 0.5},
+	"ghost": {"normal": 0.0, "psychic": 2.0, "ghost": 2.0, "dark": 0.5},
+	"dragon": {"dragon": 2.0, "steel": 0.5, "fairy": 0.0},
+	"dark": {"fighting": 0.5, "psychic": 2.0, "ghost": 2.0, "dark": 0.5, "fairy": 0.5},
+	"steel": {"fire": 0.5, "water": 0.5, "electric": 0.5, "ice": 2.0, "rock": 2.0, "steel": 0.5, "fairy": 2.0},
+	"fairy": {"fire": 0.5, "fighting": 2.0, "poison": 0.5, "dragon": 2.0, "dark": 2.0, "steel": 0.5},
+}
+
+static func get_multiplier(attack_type : String, defender_types : Array[String]) -> float:
+	var row : Dictionary = CHART.get(attack_type.to_lower(), {})
+	var multiplier : float = 1.0
+	for t in defender_types:
+		multiplier *= float(row.get(t, 1.0))
+	return multiplier
+
+static func type_name(type_data : Resource) -> String:
+	#nom d'API du type ("electric"...) ; A ADAPTER si TypeData utilise un autre champ.
+	#a defaut, on utilise le nom du fichier (ton Pokedex charge les types par "<nom>.tres")
+	var n : Variant = type_data.get("api_name")
+	if n == null or str(n) == "":
+		n = type_data.resource_path.get_file().get_basename()
+	return str(n).to_lower()
diff --git a/game/battle/type_chart.gd.uid b/game/battle/type_chart.gd.uid
new file mode 100644
index 0000000..95c23f7
--- /dev/null
+++ b/game/battle/type_chart.gd.uid
@@ -0,0 +1 @@
+uid://bmlmqh38u8hpu
diff --git a/game/world/battle.tscn b/game/world/battle.tscn
new file mode 100644
index 0000000..264c155
--- /dev/null
+++ b/game/world/battle.tscn
@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://cu5ednry26cds"]
+
+[ext_resource type="Script" uid="uid://ulemh0n2lfft" path="res://game/battle/battle_debug.gd" id="1_5bjgp"]
+
+[node name="Battle" type="Node" unique_id=520840168]
+script = ExtResource("1_5bjgp")