<?php
declare(strict_types=1);

namespace ImageResizer\Lib;

use ImageResizer\Models\Image;
use ImageResizer\Models\ResizeParams;

class SqliteImageDb implements ImageDb {
    public function __construct(
        private readonly \PDO $db
    ) {
        $this->up();
    }

    private function up() {
        $this->db->exec('CREATE TABLE IF NOT EXISTS images (
            id INTEGER PRIMARY KEY,
            path TEXT NOT NULL,
            width INTEGER NULLABLE,
            height INTEGER NULLABLE,
            quality INTEGER NULLABLE,
            content TEXT NOT NULL
        )');
    }

    public function findImage(string $path, ResizeParams $params): Image | null {
        $stmt = $this->db->prepare('SELECT * FROM images WHERE path = :path AND width = :width AND height = :height AND quality = :quality');
        $stmt->execute([
            ':path' => $path,
            ':width' => $params->width,
            ':height' => $params->height,
            ':quality' => $params->quality
        ]);

        $result = $stmt->fetchObject();

        return $result ? Image::fromString(base64_decode($result->content)) : null;
    }

    public function saveImage(
        string $path,
        ResizeParams $params,
        string $content,
    ): void {
        $stmt = $this->db->prepare("INSERT INTO images (path, width, height, quality, content) VALUES (:path, :width, :height, :quality, :content)"
);
        $stmt->execute([
            ':path' => $path,
            ':width' => $params->width,
            ':height' => $params->height,
            ':quality' => $params->quality,
            ':content' => $content
        ]);
    }
}