<?php
require_once __DIR__ . '/../core/db.php';
require_once __DIR__ . '/../core/redis.php';


class Paste
{
    private $pdo;
    public function __construct($pdo)
    {
        $this->pdo = $pdo;
    }

    public function save($id, $encrypted_text, $iv, $expire_time, $password_hash)
    {
        if ($expire_time === null) {
            $stmt = $this->pdo->prepare("INSERT INTO pastes(id, encrypted_text, iv, expire_time, password_hash)
                                     VALUES (?, ?, ?, NULL, ?)");
            return $stmt->execute([$id, $encrypted_text, $iv, $password_hash]);
        }

        $redis = redisClient();

        $expire_time = (int)$expire_time;
        $ttl = max(1, $expire_time - time());


        $redis->setex(
            "paste:$id",
            $ttl,
            json_encode([
                'encrypted_text' => $encrypted_text,
                'iv' => $iv,
                'password_hash' => $password_hash
            ])
        );


        return true;
    }


    public function get($id)
    {
        $redis = redisClient();

        $data = $redis->get("paste:$id");
        if ($data !== false) {
            $json = json_decode($data, true);
            return [
                'encrypted_text' => $json['encrypted_text'],
                'iv' => $json['iv'],
                'password_hash' => $json['password_hash'],
                'expire_time' => time() + $redis->ttl("paste:$id")
            ];
        }

        $stmt = $this->pdo->prepare("SELECT * FROM pastes WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->fetch(PDO::FETCH_ASSOC);
    }
}