<?php
declare(strict_types=1);

final class BearerRepository {
    public static function hashToken(string $token): string {
        return hash('sha256', $token);
    }

    /** @return array<string,mixed>|null */
    public static function findByToken(string $token): ?array {
        $pdo = Database::pdo();
        $stmt = $pdo->prepare(
            'SELECT * FROM bearer_tokens WHERE token_hash = ? AND revoked_at IS NULL LIMIT 1'
        );
        $stmt->execute([self::hashToken($token)]);
        $row = $stmt->fetch();
        return $row === false ? null : $row;
    }

    public static function isTrusted(array $bearer): bool {
        return (int) ($bearer['trusted'] ?? 0) === 1;
    }

    public static function canTemporary(array $bearer): bool {
        return (int) ($bearer['can_temporary'] ?? 0) === 1;
    }

    public static function canPermanent(array $bearer): bool {
        return (int) ($bearer['can_permanent'] ?? 0) === 1;
    }

    public static function rateLimitPerHour(array $bearer): int {
        return max(1, (int) ($bearer['rate_limit_per_hour'] ?? 1000));
    }

    public static function countCreatesLastHour(int $bearerId): int {
        $pdo = Database::pdo();
        $stmt = $pdo->prepare(
            'SELECT COUNT(*) AS c FROM links WHERE bearer_id = ? AND created_at >= (NOW() - INTERVAL 1 HOUR)'
        );
        $stmt->execute([$bearerId]);
        $row = $stmt->fetch();
        return (int) ($row['c'] ?? 0);
    }

    /** @return array{token: string, id: int} */
    public static function createTrusted(
        string $label,
        bool $canTemporary = true,
        bool $canPermanent = false,
        int $rateLimit = 1000
    ): array {
        $token = bin2hex(random_bytes(24));
        $pdo = Database::pdo();
        $stmt = $pdo->prepare(
            'INSERT INTO bearer_tokens (token_hash, label, trusted, can_temporary, can_permanent, rate_limit_per_hour)
             VALUES (?, ?, 1, ?, ?, ?)'
        );
        $stmt->execute([
            self::hashToken($token),
            $label,
            $canTemporary ? 1 : 0,
            $canPermanent ? 1 : 0,
            $rateLimit,
        ]);
        return ['token' => $token, 'id' => (int) $pdo->lastInsertId()];
    }
}