<?php
namespace Game\System;

use Game\Database\NPCRepository;
use Game\Database\QuestRepository; // ⭐ Add Import
use Game\Event\Event;
use Game\Event\EventListenerInterface;
use Game\Event\EventDispatcher;
use Game\Model\NPC;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Helper\QuestionHelper;
use Symfony\Component\Console\Question\Question;

/**
 * InteractionSystem: 负责处理玩家与 NPC 的对话和交互流程。
 */
class InteractionSystem implements EventListenerInterface {

    private EventDispatcher $dispatcher;
    private StateManager $stateManager;
    private NPCRepository $npcRepository; // ⭐ 新增属性
    private QuestRepository $questRepository; // ⭐ 新增
    private DialogueService $dialogueService; // ⭐ 新增
    // 输入依赖
    private InputInterface $input;
    private OutputInterface $output;
    private QuestionHelper $helper;

// ⭐ 修正构造函数：注入 NPCRepository
    public function __construct(
        EventDispatcher $dispatcher,
        StateManager $stateManager,
        NPCRepository $npcRepository,
        QuestRepository $questRepository, // ⭐ 参数
        DialogueService $dialogueService, // ⭐ 参数
        InputInterface $input,
        OutputInterface $output,
        QuestionHelper $helper
    ) {
        $this->dispatcher = $dispatcher;
        $this->stateManager = $stateManager;
        $this->npcRepository = $npcRepository; // ⭐ 赋值
        $this->questRepository = $questRepository; // ⭐ 赋值
        $this->dialogueService = $dialogueService; // ⭐ 赋值
        $this->input = $input;
        $this->output = $output;
        $this->helper = $helper;
    }

    public function handleEvent(Event $event): void {
        switch ($event->getType()) {
            case 'AttemptInteractEvent':
                $npcId = $event->getPayload()['npcId'];
                $this->startInteraction($npcId);
                break;
            // ⭐ 修正事件名称
            case 'StartInteractionEvent':
                $npcId = $event->getPayload()['npcId'];
                $this->startInteraction($npcId);
                break;
        }
    }

    /**
     * 1. 初始化 NPC 交互
     */
    private function startInteraction(string $npcId): void {
        // ⭐ 修正：使用 Repository 加载 NPC
        $npc = $this->npcRepository->createNPC($npcId);

        if (!$npc) {
            $this->dispatcher->dispatch(new Event('SystemMessage', ['message' => "这里没有人可以交谈 ({$npcId} 不存在)。"]));
            // ⭐ 切换回地图模式
            $this->stateManager->setMode(StateManager::MODE_MAP);
            return;
        }

        $this->dispatcher->dispatch(new Event('SystemMessage', [
            'message' => "👤 你走近了 <fg=cyan;options=bold>{$npc->getName()}</>。"
        ]));

        // ⭐ 直接尝试触发任务对话
        $player = $this->stateManager->getPlayer();
        $questIds = $this->questRepository->getQuestsByNpc($npc->id);
        $foundQuest = false;
        
        // ⭐ 优先检查是否有已完成的任务可以提交
        foreach ($questIds as $questId) {
            $activeQuests = $player->getActiveQuests();
            if (isset($activeQuests[$questId]) && $activeQuests[$questId]->isCompleted()) {
                // 找到已完成的任务，提示玩家交任务
                $this->dispatcher->dispatch(new Event('QuestTurnInPrompt', [
                    'questId' => $questId,
                    'npcId' => $npc->id
                ]));
                $foundQuest = true;
                break;
            }
        }
        
        // 如果没有已完成的任务，检查是否有新任务
        if (!$foundQuest) {
            foreach ($questIds as $questId) {
                // 检查任务状态：未接受 或 进行中
                if (!$player->isQuestCompleted($questId) && !isset($player->getActiveQuests()[$questId])) {
                    // 找到了一个新任务！
                    $questData = $this->questRepository->find($questId);
                    if ($questData && !empty($questData['dialogue'])) {
                        // ⭐ 使用新版对话系统
                        $this->dialogueService->startDialogue($questData['dialogue']);
                        $foundQuest = true;
                        break;
                    }
                }
            }
        }

        if (!$foundQuest) {
            // 如果没有新任务，显示 NPC 默认闲聊
            $defaultMsg = is_array($npc->dialogue) ? ($npc->dialogue['greeting'] ?? '...') : '...';
            $this->dispatcher->dispatch(new Event('SystemMessage', [
                'message' => "<fg=cyan>{$npc->getName()}</><fg=white>{$defaultMsg}</>"
            ]));
            
            // ⭐ 检查NPC是否有商店
            if ($npc->hasShop) {
                $this->dispatcher->dispatch(new Event('SystemMessage', [
                    'message' => "\n🛍️  <fg=yellow>{$npc->getName()}</> 还经营着一家商店。"
                ]));
                $this->dispatcher->dispatch(new Event('SystemMessage', [
                    'message' => "<fg=gray>输入 [S] 打开商店，[X] 离开</>"
                ]));
                
                // 设置待处理的商店NPC
                $this->stateManager->setPendingShopNpc($npc);
            } else {
                // ⭐ 没有任务也没有商店时切换回地图模式
                $this->stateManager->setMode(StateManager::MODE_MAP);
                $this->dispatcher->dispatch(new Event('ShowMenuEvent'));
            }
        }
    }
}