<?php

use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;

it('returns plausible script from cache', function () {
    Cache::put('plausible_script_js', 'console.log("Cached script");', now()->addHours(6));

    $response = $this->get('/js/script.js');

    $response->assertStatus(200)
        ->assertHeader('Content-Type', 'application/javascript')
        ->assertSee('Cached script');
});

it('fetches plausible script if not cached', function () {
    Http::fake([
        config('plausible-proxy.domain').'/js/script.js' => Http::response('console.log("Plausible script");', 200),
    ]);

    $response = $this->get('/js/script.js');

    $response->assertStatus(200)
        ->assertHeader('Content-Type', 'application/javascript')
        ->assertSee('Plausible script');

    expect(Cache::get('plausible_script_js'))->toBe('console.log("Plausible script");');
});

it('handles failed script fetch', function () {
    Http::fake([
        config('plausible-proxy.domain').'/js/script.js' => Http::response('', 500),
    ]);

    $response = $this->get('/js/script.js');

    $response->assertStatus(500)
        ->assertSee('Error fetching Plausible script');
});

it('rejects invalid event data', function () {
    $response = $this->postJson('/api/event', [
        'n' => 'pageview',
        'u' => 'invalid-url',
        'd' => 'example.com',
    ]);

    $response->assertStatus(422)
        ->assertJsonValidationErrors(['u' => 'The u field must be a valid URL.']);
});

it('forwards only user agent and client ip to plausible', function () {
    config()->set('plausible-proxy.domain', 'https://plausible.io');

    Http::fake([
        'https://plausible.io/api/event' => Http::response('ok', 202),
    ]);

    $response = $this->withServerVariables(['REMOTE_ADDR' => '203.0.113.7'])
        ->postJson('/api/event', [
            'n' => 'pageview',
            'u' => 'https://example.com/page',
            'd' => 'example.com',
        ], [
            'User-Agent' => 'TestAgent',
            'Cookie' => 'laravel_session=secret',
            'Authorization' => 'Bearer secret',
        ]);

    $response->assertStatus(202);
    expect($response->getContent())->toBe('ok');

    Http::assertSentCount(1);

    Http::assertSent(function ($request) {
        return $request->url() === 'https://plausible.io/api/event'
            && $request->header('User-Agent') === ['TestAgent']
            && $request->header('X-Forwarded-For') === ['203.0.113.7']
            && ! $request->hasHeader('Cookie')
            && ! $request->hasHeader('Authorization')
            && $request['n'] === 'pageview'
            && $request['u'] === 'https://example.com/page'
            && $request['d'] === 'example.com';
    });
});

it('forwards additional plausible fields', function () {
    config()->set('plausible-proxy.domain', 'https://plausible.io');

    Http::fake([
        'https://plausible.io/api/event' => Http::response('ok', 202),
    ]);

    $this->postJson('/api/event', [
        'n' => 'Purchase',
        'u' => 'https://example.com/checkout',
        'd' => 'example.com',
        'i' => false,
        'p' => '{"plan":"pro"}',
        '$' => ['amount' => '9.99', 'currency' => 'EUR'],
    ])->assertStatus(202);

    Http::assertSent(function ($request) {
        return $request['i'] === false
            && $request['p'] === '{"plan":"pro"}'
            && $request['$'] === ['amount' => '9.99', 'currency' => 'EUR'];
    });
});

it('rejects invalid props', function () {
    $this->postJson('/api/event', [
        'n' => 'pageview',
        'u' => 'https://example.com/page',
        'd' => 'example.com',
        'p' => 'not-json',
    ])->assertStatus(422)->assertJsonValidationErrors(['p']);
});