<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Updater;

use Brain\Monkey\Filters;
use Brain\Monkey\Functions;
use LIT\MCP\Tests\Unit\TestCase;
use LIT\MCP\Updater\GiteaUpdater;
use Mockery;
use WP_Error;

final class GiteaUpdaterTest extends TestCase
{
    private const BASENAME = 'wp-lit-mcp/wp-lit-mcp.php';
    private const ZIP_NAME = 'wp-lit-mcp-1.0.0.zip';
    private const ZIP = GiteaUpdater::REPOSITORY_URL . '/releases/download/v1.0.0/' . self::ZIP_NAME;

    private string $logFile = '';
    private string|false $previousLog = '';

    protected function setUp(): void
    {
        parent::setUp();
        // error_log() is a PHP internal and cannot be stubbed; redirect it to a temp file instead.
        $this->logFile = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
        $this->previousLog = ini_set('error_log', $this->logFile);
    }

    protected function tearDown(): void
    {
        ini_set('error_log', (string) $this->previousLog);
        unlink($this->logFile);
        parent::tearDown();
    }

    public function testRegistersItselfForTheGiteaHost(): void
    {
        $updater = $this->updater();
        Filters\expectAdded('update_plugins_' . GiteaUpdater::HOST)->once()->with([$updater, 'offer'], 10, 3);

        $updater->register();
    }

    public function testLatestReleaseIsOfferedWithItsPackage(): void
    {
        $this->givenRelease(200, self::releaseBody('v1.0.0', self::ZIP_NAME, self::ZIP));

        $update = $this->updater()->offer(false, [], self::BASENAME);

        self::assertSame('1.0.0', $update['version']);
        self::assertSame(self::ZIP, $update['package']);
        self::assertSame('wp-lit-mcp', $update['slug']);
        self::assertSame('', $this->log());
    }

    /** @dataProvider reportedAddresses */
    public function testPackageAddressIsBuiltHereNotTakenFromTheAnswer(string $reported): void
    {
        $this->givenRelease(200, self::releaseBody('v1.0.0', self::ZIP_NAME, $reported));

        $update = $this->updater()->offer(false, [], self::BASENAME);

        self::assertSame(self::ZIP, $update['package']);
    }

    /** @return array<string, array{string}> */
    public static function reportedAddresses(): array
    {
        return [
            'http, as Gitea behind a TLS proxy reports it' => [
                'http://' . GiteaUpdater::HOST . '/janniclas.loosen/WP-LIT-MCP/releases/download/v1.0.0/'
                . self::ZIP_NAME,
            ],
            'another host' => ['https://evil.example/' . self::ZIP_NAME],
        ];
    }

    public function testOtherPluginsAreLeftAlone(): void
    {
        Functions\expect('wp_remote_get')->never();

        self::assertFalse($this->updater()->offer(false, [], 'anderes/anderes.php'));
    }

    public function testGitCheckoutIsNeverOffered(): void
    {
        $dir = sys_get_temp_dir() . '/lit-mcp-checkout-' . uniqid();
        mkdir($dir . '/.git', 0777, true);
        Functions\expect('wp_remote_get')->never();

        try {
            self::assertFalse((new GiteaUpdater(self::BASENAME, $dir))->offer(false, [], self::BASENAME));
        } finally {
            rmdir($dir . '/.git');
            rmdir($dir);
        }
    }

    public function testUnreachableGiteaOffersNothingAndLogsWhy(): void
    {
        Functions\when('wp_remote_get')->justReturn(new WP_Error('http_request_failed', 'cURL error 28'));

        self::assertFalse($this->updater()->offer(false, [], self::BASENAME));
        self::assertStringContainsString('update check failed: cURL error 28', $this->log());
    }

    public function testHttpErrorOffersNothingAndLogsTheStatus(): void
    {
        $this->givenRelease(404, '{"message":"not found"}');

        self::assertFalse($this->updater()->offer(false, [], self::BASENAME));
        self::assertStringContainsString('update check failed: HTTP 404', $this->log());
    }

    /** @dataProvider unusableReleases */
    public function testUnusableReleaseOffersNothingAndLogsIt(string $body): void
    {
        $this->givenRelease(200, $body);

        self::assertFalse($this->updater()->offer(false, [], self::BASENAME));
        self::assertStringContainsString('update check failed', $this->log());
    }

    /** @return array<string, array{string}> */
    public static function unusableReleases(): array
    {
        return [
            'no JSON' => ['<html>'],
            'tag is no version' => [self::releaseBody('latest', self::ZIP_NAME, self::ZIP)],
            'pre-release tag' => [self::releaseBody('v1.0.0-rc1', self::ZIP_NAME, self::ZIP)],
            'tag with trailing newline' => [self::releaseBody("v1.0.0\n", self::ZIP_NAME, self::ZIP)],
            'asset missing' => [self::releaseBody('v1.0.0', 'other.zip', self::ZIP)],
            'release without assets' => ['{"tag_name":"v1.0.0"}'],
            'asset of another version' => [self::releaseBody('v1.0.0', 'wp-lit-mcp-0.9.0.zip', self::ZIP)],
        ];
    }

    private function updater(): GiteaUpdater
    {
        // __DIR__ has no .git folder.
        return new GiteaUpdater(self::BASENAME, __DIR__);
    }

    private function log(): string
    {
        return (string) file_get_contents($this->logFile);
    }

    private function givenRelease(int $status, string $body): void
    {
        $latestRelease = Mockery::pattern('#^https://git\.loosen-it\.de/api/v1/repos/.+/releases/latest$#');
        Functions\expect('wp_remote_get')->once()
            ->with($latestRelease, Mockery::type('array'))
            ->andReturn(['body' => $body]);
        Functions\when('wp_remote_retrieve_response_code')->justReturn($status);
        Functions\when('wp_remote_retrieve_body')->justReturn($body);
    }

    private static function releaseBody(string $tag, string $assetName, string $url): string
    {
        // Data providers run before setUp(), so the wp_json_encode() stub does not exist yet.
        return (string) json_encode([ // phpcs:ignore WordPress.WP.AlternativeFunctions.json_encode_json_encode
            'tag_name' => $tag,
            'assets' => [['name' => $assetName, 'browser_download_url' => $url]],
        ]);
    }
}