<?php

use PHPUnit\Framework\TestCase;

/**
 * OneTimeTokenTest — unit tests for the shared single-use token model.
 */
class OneTimeTokenTest extends TestCase
{
    private OneTimeToken $ot;
    private PDO $pdo;

    protected function setUp(): void
    {
        TestDatabase::resetData();
        $this->pdo = TestDatabase::getPDO();
        $this->ot  = new OneTimeToken($this->pdo);
    }

    public function testIssueReturns256BitHex(): void
    {
        $token = $this->ot->issue('test', 3600);
        $this->assertMatchesRegularExpression('/^[0-9a-f]{64}$/', $token);
    }

    public function testIssueStoresOnlyHashAndContext(): void
    {
        $token = $this->ot->issue('test', 3600, ['a' => 1]);
        $row = $this->pdo->query("SELECT * FROM one_time_tokens WHERE purpose = 'test'")->fetch();

        $this->assertNotFalse($row);
        $this->assertSame(hash('sha256', $token), $row['token_hash']);
        $this->assertNotSame($token, $row['token_hash']);
        $this->assertSame(['a' => 1], json_decode($row['context'], true));
    }

    public function testPurposeIsolation(): void
    {
        $token = $this->ot->issue('alpha', 3600);
        $this->assertFalse($this->ot->isValid('beta', $token));
    }

    public function testRedeemReturnsContextAndConsumesToken(): void
    {
        $token = $this->ot->issue('test', 3600, ['k' => 'v']);
        $this->assertSame(['k' => 'v'], $this->ot->redeem('test', $token));
        $this->assertNull($this->ot->redeem('test', $token));
    }

    public function testExpiredTokenIsInvalidAndLookupStillFindsIt(): void
    {
        $token = $this->ot->issue('test', -10, ['k' => 'v']);
        $this->assertFalse($this->ot->isValid('test', $token));
        $this->assertNull($this->ot->redeem('test', $token));

        $row = $this->ot->lookup('test', $token);
        $this->assertNotNull($row);
        $this->assertSame(['k' => 'v'], $row['context']);
    }

    public function testLookupUnknownTokenReturnsNull(): void
    {
        $this->assertNull($this->ot->lookup('test', str_repeat('ab', 32)));
    }
}