场景“目标选择面板”与“技能选择面板基本一致”

在选择技能之后应根据技能类型刷新技能可作用的对象

技能选择面板、目标选择面板、battle_scene & battle manager相互作用流程:

1.当双击技能后: 自动调用”按下使用按钮”方法->发出skill_selected信号->battle_scene将此信号绑定到此信号的处理函数“_on_skill_selected”

func _on_skill_selected(skill: SkillData) -> void:
	current_selected_skill = skill
	
	# 根据技能目标类型决定下一步操作
	match skill.target_type:
		SkillData.TargetType.SELF:
			# 自身技能无需选择目标
			battle_manager.player_select_action("skill", battle_manager.current_turn_character, skill)
		SkillData.TargetType.ENEMY_SINGLE:
			# 显示敌人目标选择菜单
			var valid_targets = battle_manager.get_valid_enemy_targets()
			if !valid_targets.is_empty():
				target_selection_menu.show_targets(valid_targets)
			else:
				update_battle_info("没有可选择的敌方目标！")
				_on_skill_selection_cancelled()		
		SkillData.TargetType.ENEMY_ALL:
			# 群体敌人技能无需选择目标
			var valid_targets = battle_manager.get_valid_enemy_targets()
			if !valid_targets.is_empty():
				battle_manager.player_select_action("skill", null, skill, valid_targets)
			else:
				update_battle_info("没有可选择的敌方目标！")
				_on_skill_selection_cancelled()
		
		SkillData.TargetType.ALLY_SINGLE:
			# 显示我方(不含自己)目标选择菜单
			var valid_targets = battle_manager.get_valid_ally_targets(false)
			if !valid_targets.is_empty():
				target_selection_menu.show_targets(valid_targets)
			else:
				update_battle_info("没有可选择的友方目标！")
				_on_skill_selection_cancelled()
		
		SkillData.TargetType.ALLY_SINGLE_INC_SELF:
			# 显示我方(含自己)目标选择菜单
			var valid_targets = battle_manager.get_valid_ally_targets(true)
			if !valid_targets.is_empty():
				target_selection_menu.show_targets(valid_targets)
			else:
				update_battle_info("没有可选择的友方目标！")
				_on_skill_selection_cancelled()
		
		SkillData.TargetType.ALLY_ALL:
			# 群体我方(不含自己)技能
			var valid_targets = battle_manager.get_valid_ally_targets(false)
			if !valid_targets.is_empty():
				battle_manager.player_select_action("skill", null, skill, valid_targets)
			else:
				update_battle_info("没有可选择的友方目标！")
				_on_skill_selection_cancelled()
		
		SkillData.TargetType.ALLY_ALL_INC_SELF:
			# 群体我方(含自己)技能
			var valid_targets = battle_manager.get_valid_ally_targets(true)
			if !valid_targets.is_empty():
				battle_manager.player_select_action("skill", null, skill, valid_targets)
			else:
				update_battle_info("没有可选择的友方目标！")
				_on_skill_selection_cancelled()
		
		_:
			update_battle_info("未处理的目标类型: " + str(skill.target_type))
			_on_skill_selection_cancelled()

2.假设选择的是“火球术‘，此时根据火球术的技能类型：敌方单体，会调用battle_manager的get_valid_enemy_targets()便利还存活的地方角色返回一个数组“valid_targets[]”.–>将此数组”valid_targets[]”通过show_targets（targets：Array[Character]）展示在目标选择面板上。

func show_targets(targets: Array[Character]) -> void:
	self.available_targets = targets
	target_list.clear()
	selected_target_index = -1
	select_button.disabled = true

	for i in range(targets.size()):
		var character = targets[i]
		if character:
			var item_text = character.character_name + " (HP: " + str(character.current_hp) + "/" + str(character.max_hp) + ")"
			target_list.add_item(item_text)
			
			# 如果目标已死亡，标记为不可选
			if character.current_hp <= 0:
				target_list.set_item_disabled(i, true)
				target_list.set_item_custom_fg_color(i, Color(0.5, 0.5, 0.5))
	
	show()
	target_list.grab_focus()
3.选择目标后容器Itemlist会返回一个Index，此时双击会发出一个信号"target_selected"(信号的参数是选择的目标对应的Index即battle_scene以及battle_manager返回的可选取对象数组对应的编号)————》target_selected会由_on_...来处理，如果判断确实使用的是单体技能就调用battle_manager的player_select_action函数

func player_select_action(action_type: String, target = null, skill_data: SkillData = null, targets : Array[Character] = []) -> void:
	print("玩家选择行动: ", action_type)
	
	# 执行选择的行动
	match action_type:
		"attack":
			if target and target is Character:
				_execute_attack(current_turn_character, target)
			else:
				# 默认选择第一个敌人作为目标
				var default_target = null
				for enemy in enemy_characters:
					if enemy.current_hp > 0:
						default_target = enemy
						break
						
				if default_target:
					_execute_attack(current_turn_character, default_target)
				else:
					print("错误：没有可用的目标")
					return
		"defend":
			_execute_defend(current_turn_character)
		"skill":
			var skill_targets : Array[Character] = targets
			if skill_targets.is_empty():
				skill_targets.append(target)
			_execute_skill(current_turn_character, skill_targets, skill_data)
		_:
			print("未知行动类型: ", action_type)
			return
	# 检查战斗是否结束
	if check_battle_end_condition():
		return # 战斗已结束
	state_manager.change_state(BattleStateManager.BattleState.TURN_END)

4.此时判断玩家使用的行动是“skill”经过判断之后执行”_execute_skill”检查mp是否足以释放技能，再判断是治疗技能还是伤害技能，在这里是伤害技能，执行“_execute_damage_skill”

5.然后调用“_calculate_skill_damage‘计算技能伤害

func _calculate_skill_damage(caster: Character, target: Character, skill: SkillData) -> int:
	# 基础伤害计算
	var base_damage = skill.power + (caster.magic_attack * 0.8)
	
	# 考虑目标防御
	var damage_after_defense = base_damage - (target.magic_defense * 0.5)
	
	# 加入随机浮动因素 (±10%)
	var random_factor = randf_range(0.9, 1.1)
	var final_damage = damage_after_defense * random_factor
	
	# 确保伤害至少为1
	return max(1, round(final_damage))

6.对选择的目标造成这个计算出的伤害（调用Character里面的take_damage）

func take_damage(base_damage: int) -> int:
var final_damage: int = base_damage
# 如果处于防御状态，则减免伤害
if _is_defending:
    final_damage = round(final_damage * 0.5)
    print(character_name + " 正在防御，伤害减半！")
    set_defending(false)    # 防御效果通常在受到一次攻击后解除

final_damage = max(1, final_damage) # 保证至少1点伤害

current_hp = max(0, current_hp - final_damage)

hp_changed.emit(current_hp, max_hp)
if current_hp == 0:
    die()

print_rich("[color=red]" + character_name + " 受到 " + str(final_damage) + " 点伤害![/color]")
return final_damage

7.再调用“spawn_damage_number”生成伤害数字

func spawn_damage_number(position: Vector2, amount: int, color : Color) -> void:
	var damage_number = DAMAGE_NUMBER_SCENE.instantiate()
	get_parent().add_child(damage_number)
	damage_number.global_position = position + Vector2(0, -50)
	damage_number.show_number(str(amount), color)