<?php
namespace Game\Core;

/**
 * Web 游戏会话 - 使用完整的 Game 逻辑
 */
class GameSession
{
    private Game $game;
    private WebOutput $output;
    private string $userId;

    public function __construct(string $userId)
    {
        $this->userId = $userId;
        $this->output = new WebOutput();

        // 设置 Web 输入模式
        $webInput = WebInput::getInstance();
        $webInput->setWebMode(true);

        // 创建 Game 实例，使用 WebOutput 和用户 ID
        $this->game = new Game(null, $this->output, $userId);
    }

    /**
     * 渲染当前界面（不需要输入）
     */
    public function render(): string
    {
        $this->output->clear();

        try {
            $this->runCurrentState();
        } catch (NeedInputException $e) {
            // 正常情况，界面渲染完成，等待输入
        }

        return $this->output->getOutput();
    }

    /**
     * 处理用户输入并返回新界面（支持时间戳数据）
     */
    public function handleInput(string $input): string|array
    {
        $this->output->clear();

        // 将输入推入队列
        $webInput = WebInput::getInstance();
        $webInput->clear();
        $webInput->push($input);

        try {
            $this->runCurrentState();
        } catch (NeedInputException $e) {
            // 需要更多输入，返回当前输出
        }

        // 保存状态
        $this->game->saveState();

        // 获取当前状态信息
        $stateInfo = $this->getStateInfo();
        $output = $this->output->getOutput();

        // 返回包含状态信息的结构化数据
        return [
            'output' => $output,
            'state' => $stateInfo['state'],
            'stateName' => $stateInfo['stateName'],
            'playerInfo' => $stateInfo['playerInfo'],
        ];
    }

    /**
     * SSE 流式战斗模式
     * 当用户进入战斗时，使用SSE直接推送日志
     */
    public function streamBattle(string $input): void
    {
        // 使用SSEOutput替换普通输出
        $sseOutput = new \Game\Core\SSEOutput();

        // 替换game的output对象
        $this->game->output = $sseOutput;

        // 将输入推入队列
        $webInput = WebInput::getInstance();
        $webInput->clear();
        $webInput->push($input);

        try {
            $this->runCurrentState();
        } catch (NeedInputException $e) {
            // 战斗中可能需要更多输入
        }

        // 保存状态
        $this->game->saveState();

        // 发送完成信号
        $sseOutput->complete();
    }

    /**
     * 执行当前状态的逻辑
     */
    private function runCurrentState(): void
    {
        if ($this->game->state == 0){
            $this->game->state = 1;
        }
        switch ($this->game->state) {
            case Game::MENU:
                (new \Game\Modules\Menu($this->game))->show();
                break;
            case Game::DUNGEON_SELECT:
                (new \Game\Modules\DungeonSelectPanel($this->game))->show();
                break;
            case Game::BATTLE:
                (new \Game\Modules\Battle($this->game))->start();
                break;
            case Game::STATS:
                (new \Game\Modules\StatsPanel($this->game))->show();
                break;
            case Game::INVENTORY:
                (new \Game\Modules\InventoryPanel($this->game))->show();
                break;
            case Game::EQUIPMENT_ENHANCE:
                (new \Game\Modules\EquipmentEnhancePanel($this->game))->show();
                break;
            case Game::NPC:
                (new \Game\Modules\NpcPanel($this->game))->show();
                break;
            case Game::TALENT:
                (new \Game\Modules\TalentPanel($this->game))->show();
                break;
        }
    }

    /**
     * 获取当前游戏状态
     */
    public function getState(): int
    {
        return $this->game->state;
    }

    /**
     * 获取玩家信息
     */
    public function getPlayerInfo(): array
    {
        $stats = $this->game->player->getStats();
        return [
            'level' => $this->game->player->level,
            'hp' => $this->game->player->hp,
            'maxHp' => $stats['maxHp'],
            'mana' => $this->game->player->mana,
            'maxMana' => $stats['maxMana'],
            'spiritStones' => $this->game->player->spiritStones,
            'exp' => $this->game->player->exp,
            'maxExp' => $this->game->player->maxExp,
        ];
    }

    /**
     * 获取当前游戏状态信息
     */
    public function getStateInfo(): array
    {
        return [
            'state' => $this->game->state,
            'stateName' => $this->getStateName(),
            'playerInfo' => $this->getPlayerInfo(),
        ];
    }

    /**
     * 将状态常量转换为名称
     */
    private function getStateName(): string
    {
        return match($this->game->state) {
            Game::MENU => 'MENU',
            Game::DUNGEON_SELECT => 'DUNGEON_SELECT',
            Game::BATTLE => 'BATTLE',
            Game::STATS => 'STATS',
            Game::INVENTORY => 'INVENTORY',
            Game::EQUIPMENT_ENHANCE => 'EQUIPMENT_ENHANCE',
            Game::NPC => 'NPC',
            Game::TALENT => 'TALENT',
            Game::EXIT => 'EXIT',
            default => 'UNKNOWN'
        };
    }
}