<?php

namespace app\common\model\ai;

use app\common\model\BaseModel;
use app\common\model\user\User;

class AiUnlock extends BaseModel
{
    /**
     * 检查用户是否已解锁某场比赛
     */
    public static function isUnlocked(int $userId, int $matchId): bool
    {
        return self::where('user_id', $userId)->where('match_id', $matchId)->count() > 0;
    }

    /**
     * 解锁比赛（扣次数 + 写记录）
     * @return array ['ok' => bool, 'msg' => string]
     */
    public static function unlock(int $userId, int $matchId): array
    {
        // 已解锁则直接返回
        if (self::isUnlocked($userId, $matchId)) {
            return ['ok' => true, 'msg' => '已解锁'];
        }

        // 检查今日剩余次数
        $user = User::findOrEmpty($userId);
        if ($user->isEmpty()) {
            return ['ok' => false, 'msg' => '用户不存在'];
        }

        // VIP用户不限次数
        if ($user->is_vip && $user->vip_expire_time > time()) {
            self::create([
                'user_id' => $userId,
                'match_id' => $matchId,
            ]);
            return ['ok' => true, 'msg' => 'VIP解锁'];
        }

        // 重置每日次数（跨天时）
        $today = date('Y-m-d');
        if ($user->ai_free_date !== $today) {
            $user->ai_free_count = 3;
            $user->ai_free_date = $today;
            $user->save();
        }

        if ($user->ai_free_count <= 0) {
            return ['ok' => false, 'msg' => '今日免费次数已用完，升级VIP可无限使用'];
        }

        // 扣次数 + 写解锁记录
        $user->ai_free_count = $user->ai_free_count - 1;
        $user->save();

        self::create([
            'user_id' => $userId,
            'match_id' => $matchId,
        ]);

        return ['ok' => true, 'msg' => '解锁成功', 'remain' => $user->ai_free_count];
    }

    /**
     * 获取用户今日剩余次数
     */
    public static function getRemainCount(int $userId): int
    {
        $user = User::findOrEmpty($userId);
        if ($user->isEmpty()) {
            return 0;
        }
        // VIP不限
        if ($user->is_vip && $user->vip_expire_time > time()) {
            return 999;
        }
        $today = date('Y-m-d');
        if ($user->ai_free_date !== $today) {
            return 3;
        }
        return max(0, (int)$user->ai_free_count);
    }
}