<?php

namespace Tests\Unit;

use App\Services\IntegrationCache;
use Illuminate\Support\Facades\Cache;
use RuntimeException;
use Tests\TestCase;

class IntegrationCacheTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        Cache::flush();
    }

    public function test_fresh_values_are_served_without_calling_the_api_again(): void
    {
        $cache = new IntegrationCache;
        $calls = 0;
        $fetch = function () use (&$calls): array {
            $calls++;

            return ['call' => $calls];
        };

        $this->assertSame(['call' => 1], $cache->remember('orders', 60, $fetch));
        $this->assertSame(['call' => 1], $cache->remember('orders', 60, $fetch));
        $this->assertSame(['call' => 2], $cache->remember('orders', 60, $fetch, true));
        $this->assertSame(2, $calls);
    }

    public function test_last_good_value_is_served_when_the_api_fails_after_expiry(): void
    {
        $cache = new IntegrationCache;
        $cache->remember('orders', 0, fn (): array => ['ok' => true]);

        $this->assertSame(['ok' => true], $cache->remember('orders', 0, function (): never {
            throw new RuntimeException('API down');
        }));
    }

    public function test_failures_with_no_cached_value_are_not_retried_during_cooldown(): void
    {
        $cache = new IntegrationCache;
        $calls = 0;
        $failing = function () use (&$calls): never {
            $calls++;

            throw new RuntimeException('API down');
        };

        foreach (range(1, 3) as $attempt) {
            try {
                $cache->remember('orders', 60, $failing);
            } catch (RuntimeException) {
            }
        }

        $this->assertSame(1, $calls);
    }

    public function test_refresh_flag_bypasses_fresh_entries(): void
    {
        $cache = new IntegrationCache;
        $cache->remember('orders', 60, fn (): array => ['v' => 1]);
        $cache->forceRefresh = true;

        $this->assertSame(['v' => 2], $cache->remember('orders', 60, fn (): array => ['v' => 2]));
    }
}