<?php

use Illuminate\Support\Facades\Http;
use Mattitja\Analytics\Data\PageviewData;
use Mattitja\Analytics\Services\AnalyticsClient;

beforeEach(function () {
    Http::fake();
    @unlink(storage_path('framework/mattitja-analytics.paused'));
});

afterEach(function () {
    @unlink(storage_path('framework/mattitja-analytics.paused'));
});

function testPageview(): PageviewData
{
    return new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
    );
}

it('sends analytics data to the correct endpoint', function () {
    $client = new AnalyticsClient;
    $data = new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
        referrer: 'https://google.com',
    );

    $client->send($data);

    Http::assertSent(function ($request) {
        return $request->url() === 'https://analytics.mattitja.se/api/send' &&
               $request->method() === 'POST' &&
               $request->data() === [
                   'k' => 'testsiteky',
                   'u' => 'https://example.com/test',
                   'ip' => '192.168.1.1',
                   'ua' => 'Mozilla/5.0 Chrome',
                   'r' => 'https://google.com',
               ];
    });
});

it('handles API failures gracefully', function () {
    Http::fake([
        'analytics.mattitja.se/*' => Http::response('Server Error', 500),
    ]);

    $client = new AnalyticsClient;
    $data = new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
        referrer: 'https://google.com',
    );

    expect(fn () => $client->send($data))->not->toThrow(Exception::class);
});

it('sends data with correct site key', function () {
    $client = new AnalyticsClient;
    $data = new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
    );

    $client->send($data);

    Http::assertSent(function ($request) {
        return $request->data()['k'] === 'testsiteky';
    });
});

it('skips sending when required fields are empty', function () {
    $client = new AnalyticsClient;

    $client->send(new PageviewData(
        siteKey: '',
        url: 'https://example.com',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0',
    ));

    $client->send(new PageviewData(
        siteKey: 'testsiteky',
        url: '',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0',
    ));

    $client->send(new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com',
        ip: '',
        userAgent: 'Mozilla/5.0',
    ));

    Http::assertNothingSent();
});

it('skips sending when URL exceeds 512 characters', function () {
    $client = new AnalyticsClient;
    $longUrl = 'https://example.com/'.str_repeat('a', 500);

    $client->send(new PageviewData(
        siteKey: 'testsiteky',
        url: $longUrl,
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
    ));

    Http::assertNothingSent();
});

it('excludes empty referrer from payload', function () {
    $client = new AnalyticsClient;
    $data = new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
        referrer: '',
    );

    $client->send($data);

    Http::assertSent(function ($request) {
        return ! isset($request->data()['r']);
    });
});

it('excludes null referrer from payload', function () {
    $client = new AnalyticsClient;
    $data = new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
        referrer: null,
    );

    $client->send($data);

    Http::assertSent(function ($request) {
        return ! isset($request->data()['r']);
    });
});

it('sends the ingest secret as bearer token and forwards Accept-Language', function () {
    (new AnalyticsClient)->send(new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
        acceptLanguage: 'sv-SE,sv;q=0.9',
    ));

    Http::assertSent(function ($request) {
        return $request->hasHeader('Authorization', 'Bearer test-secret')
            && $request->hasHeader('Accept-Language', 'sv-SE,sv;q=0.9')
            && ! array_key_exists('acceptLanguage', $request->data());
    });
});

it('logs a warning when the API rejects the pageview', function () {
    Http::swap(new \Illuminate\Http\Client\Factory);
    Http::fake(['*' => Http::response('', 401)]);
    \Illuminate\Support\Facades\Log::spy();

    (new AnalyticsClient)->send(new PageviewData(
        siteKey: 'testsiteky',
        url: 'https://example.com/test',
        ip: '192.168.1.1',
        userAgent: 'Mozilla/5.0 Chrome',
    ));

    \Illuminate\Support\Facades\Log::shouldHaveReceived('warning')
        ->withArgs(fn ($message, $context) => str_contains($message, 'rejected') && $context['status'] === 401)
        ->once();
});

it('pauses sending after a connection failure', function () {
    Http::swap(new \Illuminate\Http\Client\Factory);
    $attempts = 0;
    Http::fake(function () use (&$attempts) {
        $attempts++;

        throw new \Illuminate\Http\Client\ConnectionException('timeout');
    });

    $client = new AnalyticsClient;
    $client->send(testPageview());
    $client->send(testPageview());

    expect($client->isPaused())->toBeTrue()
        ->and($attempts)->toBe(1);
});

it('pauses sending after a server error', function () {
    Http::swap(new \Illuminate\Http\Client\Factory);
    Http::fake(['*' => Http::response('', 503)]);

    $client = new AnalyticsClient;
    $client->send(testPageview());
    $client->send(testPageview());

    expect($client->isPaused())->toBeTrue();
    Http::assertSentCount(1);
});

it('does not pause on client errors', function () {
    Http::swap(new \Illuminate\Http\Client\Factory);
    Http::fake(['*' => Http::response('', 401)]);

    $client = new AnalyticsClient;
    $client->send(testPageview());

    expect($client->isPaused())->toBeFalse();
});

it('resumes sending after the pause expires', function () {
    touch(storage_path('framework/mattitja-analytics.paused'), time() - 120);

    $client = new AnalyticsClient;
    $client->send(testPageview());

    Http::assertSentCount(1);
    expect(file_exists(storage_path('framework/mattitja-analytics.paused')))->toBeFalse();
});