"""
测试事件系统和烟幕管理器
"""
import pytest
from kards_battle.core.battle_engine import BattleEngine
from kards_battle.units.unit_loader import load_unit
from kards_battle.core.enums import LineType
from kards_battle.events.event_system import (
    EventType, GameEvent, EventBus, EventSubscriber, 
    publish_event, subscribe_to_events
)
from kards_battle.events.managers.smokescreen_manager import SmokescreenManager


class MockEventSubscriber(EventSubscriber):
    """测试用事件订阅者"""
    
    def __init__(self):
        self.received_events = []
    
    def get_subscribed_events(self):
        return [EventType.UNIT_DEPLOYED, EventType.UNIT_MOVED, EventType.UNIT_ATTACKED]
    
    def handle_event(self, event):
        self.received_events.append(event)


class TestEventSystem:
    """事件系统测试"""
    
    def test_event_bus_basic_functionality(self):
        """测试事件总线基本功能"""
        bus = EventBus()
        subscriber = MockEventSubscriber()
        
        # 订阅事件
        bus.subscribe(subscriber)
        assert bus.get_subscriber_count(EventType.UNIT_DEPLOYED) == 1
        
        # 发布事件
        event = GameEvent(EventType.UNIT_DEPLOYED, data={"test": "data"})
        bus.publish(event)
        
        # 检查是否收到事件
        assert len(subscriber.received_events) == 1
        assert subscriber.received_events[0].event_type == EventType.UNIT_DEPLOYED
        assert subscriber.received_events[0].data["test"] == "data"
    
    def test_event_cancellation(self):
        """测试事件取消功能"""
        bus = EventBus()
        
        class CancellingSubscriber(EventSubscriber):
            def get_subscribed_events(self):
                return [EventType.BEFORE_ATTACK_CHECK]
            
            def handle_event(self, event):
                if event.cancellable:
                    event.cancel("Test cancellation")
        
        subscriber = CancellingSubscriber()
        bus.subscribe(subscriber)
        
        # 发布可取消事件
        event = GameEvent(
            EventType.BEFORE_ATTACK_CHECK, 
            cancellable=True
        )
        bus.publish(event)
        
        # 检查事件是否被取消
        assert event.cancelled
        assert event.cancel_reason == "Test cancellation"


class TestSmokescreenManager:
    """烟幕管理器测试"""
    
    def setup_method(self):
        """每个测试前的设置"""
        self.engine = BattleEngine('Germany', 'USA', debug_mode=True)
    
    def test_smokescreen_deployment_and_activation(self):
        """测试烟幕部署和激活"""
        unit = load_unit('ger_infantry_grenadier')
        unit.add_keyword('SMOKESCREEN')
        
        # 部署到支援线应该激活烟幕
        self.engine.deploy_unit_to_support(unit, 0)
        
        assert unit.has_keyword('SMOKESCREEN')
        assert unit.position[0] == LineType.PLAYER1_SUPPORT
    
    def test_smokescreen_removed_on_move(self):
        """测试移动时移除烟幕"""
        unit = load_unit('ger_infantry_grenadier')
        unit.add_keyword('SMOKESCREEN')
        
        self.engine.deploy_unit_to_support(unit, 0)
        assert unit.has_keyword('SMOKESCREEN')
        
        # 模拟下一回合允许移动
        unit.start_new_turn()
        self.engine.debug_set_kredits(0, kredits=5)
        
        # 移动到前线应该移除烟幕
        result = self.engine.move_unit(unit.id, (LineType.FRONT, 0), 0)
        
        assert result['success']
        assert not unit.has_keyword('SMOKESCREEN')
    
    def test_smokescreen_removed_on_attack(self):
        """测试攻击时移除烟幕"""
        attacker = load_unit('ger_infantry_grenadier')
        attacker.add_keyword('SMOKESCREEN')
        target = load_unit('usa_infantry_gi')
        
        # 部署单位
        self.engine.deploy_unit_to_support(attacker, 0)
        self.engine.end_turn()
        self.engine.deploy_unit_to_support(target, 1)
        
        # 移动攻击者到前线
        attacker.start_new_turn()
        self.engine.debug_set_kredits(0, kredits=5)
        self.engine.move_unit(attacker.id, (LineType.FRONT, 0), 0)
        
        # 重新添加烟幕（因为移动时被移除了）
        attacker.add_keyword('SMOKESCREEN')
        assert attacker.has_keyword('SMOKESCREEN')
        
        # 切换回德军回合并攻击
        self.engine.end_turn()
        attacker.start_new_turn()
        result = self.engine.attack_target(attacker.id, target.id, 0)
        
        if result['success']:
            # 如果攻击成功，烟幕应该被移除
            assert not attacker.has_keyword('SMOKESCREEN')
    
    def test_smokescreen_blocks_attacks(self):
        """测试烟幕阻止攻击"""
        defender = load_unit('ger_infantry_grenadier')
        defender.add_keyword('SMOKESCREEN')
        attacker = load_unit('usa_infantry_gi')
        
        # 部署单位
        self.engine.deploy_unit_to_support(defender, 0)
        self.engine.end_turn()
        self.engine.deploy_unit_to_support(attacker, 1)
        
        # 移动攻击者到前线
        attacker.start_new_turn()
        self.engine.debug_set_kredits(1, kredits=5)
        self.engine.move_unit(attacker.id, (LineType.FRONT, 0), 1)
        
        # 尝试攻击有烟幕的单位
        attacker.start_new_turn()
        result = self.engine.attack_target(attacker.id, defender.id, 1)
        
        assert not result['success']
        assert "Protected by SMOKESCREEN" in result['reason']
        assert defender.has_keyword('SMOKESCREEN')  # 烟幕应该还在
    
    def test_smokescreen_removed_on_front_line(self):
        """测试单位在前线时失去烟幕"""
        unit = load_unit('ger_infantry_grenadier')
        unit.add_keyword('SMOKESCREEN')
        
        self.engine.deploy_unit_to_support(unit, 0)
        assert unit.has_keyword('SMOKESCREEN')
        
        # 移动到前线
        unit.start_new_turn()
        self.engine.debug_set_kredits(0, kredits=5)
        result = self.engine.move_unit(unit.id, (LineType.FRONT, 0), 0)
        
        assert result['success']
        assert unit.position[0] == LineType.FRONT
        assert not unit.has_keyword('SMOKESCREEN')
    
    def test_smokescreen_removed_with_guard(self):
        """测试获得GUARD关键词时失去烟幕"""
        unit = load_unit('ger_infantry_grenadier')
        unit.add_keyword('SMOKESCREEN')
        
        self.engine.deploy_unit_to_support(unit, 0)
        assert unit.has_keyword('SMOKESCREEN')
        
        # 添加GUARD关键词应该移除烟幕
        unit.add_keyword('GUARD')
        
        # 发布关键词添加事件来触发管理器
        publish_event(GameEvent(
            event_type=EventType.KEYWORD_ADDED,
            target=unit,
            data={'keyword': 'GUARD'}
        ))
        
        # 烟幕应该被移除（可能需要等待事件处理）
        # 这个测试可能需要调整，取决于事件处理的具体实现


class TestIntegratedEventSystem:
    """集成事件系统测试"""
    
    def setup_method(self):
        """每个测试前的设置"""
        self.engine = BattleEngine('Germany', 'USA', debug_mode=True)
    
    def test_event_system_deployment_and_movement(self):
        """测试事件系统的部署和移动事件发布"""
        subscriber = MockEventSubscriber()
        subscribe_to_events(subscriber)
        
        # 创建和部署单位
        ger_unit = load_unit('ger_infantry_grenadier')
        
        self.engine.deploy_unit_to_support(ger_unit, 0)
        
        # 检查部署事件
        deployed_events = [e for e in subscriber.received_events 
                          if e.event_type == EventType.UNIT_DEPLOYED]
        assert len(deployed_events) == 1
        assert deployed_events[0].source == ger_unit
        
        # 移动单位（在新回合）
        ger_unit.start_new_turn()
        self.engine.debug_set_kredits(0, kredits=5)
        result = self.engine.move_unit(ger_unit.id, (LineType.FRONT, 0), 0)
        
        # 检查移动是否成功
        assert result['success']
        
        # 检查移动事件
        moved_events = [e for e in subscriber.received_events 
                       if e.event_type == EventType.UNIT_MOVED]
        assert len(moved_events) == 1
        assert moved_events[0].source == ger_unit
        
        # 验证事件数据完整性
        move_event = moved_events[0]
        assert 'old_position' in move_event.data
        assert 'new_position' in move_event.data
        assert 'player_id' in move_event.data