<?php

declare(strict_types=1);

namespace Magdev\WpPrometheus\Tests\Unit;

use Magdev\WpPrometheus\Installer;
use Magdev\WpPrometheus\Tests\Helpers\GlobalFunctionState;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Test;

#[CoversClass(Installer::class)]
class InstallerTest extends TestCase
{
    // ── activate() ───────────────────────────────────────────────────

    #[Test]
    public function activate_stores_activation_time(): void
    {
        Installer::activate();

        $this->assertArrayHasKey(
            'wp_prometheus_activated',
            GlobalFunctionState::$options
        );
        $this->assertIsInt(GlobalFunctionState::$options['wp_prometheus_activated']);
    }

    #[Test]
    public function activate_flushes_rewrite_rules(): void
    {
        Installer::activate();

        $this->assertGreaterThanOrEqual(
            1,
            GlobalFunctionState::getCallCount('flush_rewrite_rules')
        );
    }

    #[Test]
    public function activate_generates_auth_token_when_not_set(): void
    {
        Installer::activate();

        $this->assertArrayHasKey(
            'wp_prometheus_auth_token',
            GlobalFunctionState::$options
        );
        $this->assertNotEmpty(GlobalFunctionState::$options['wp_prometheus_auth_token']);
    }

    #[Test]
    public function activate_preserves_existing_auth_token(): void
    {
        GlobalFunctionState::$options['wp_prometheus_auth_token'] = 'existing-token';

        Installer::activate();

        $this->assertSame(
            'existing-token',
            GlobalFunctionState::$options['wp_prometheus_auth_token']
        );
    }

    #[Test]
    public function activate_enables_default_metrics(): void
    {
        Installer::activate();

        $this->assertSame(
            1,
            GlobalFunctionState::$options['wp_prometheus_enable_default_metrics']
        );
    }

    #[Test]
    public function activate_sets_default_enabled_metrics_list(): void
    {
        Installer::activate();

        $enabled = GlobalFunctionState::$options['wp_prometheus_enabled_metrics'];
        $this->assertIsArray($enabled);
        $this->assertContains('wordpress_info', $enabled);
        $this->assertContains('wordpress_users_total', $enabled);
        $this->assertContains('wordpress_posts_total', $enabled);
        $this->assertContains('wordpress_comments_total', $enabled);
        $this->assertContains('wordpress_plugins_total', $enabled);
    }

    #[Test]
    public function activate_preserves_existing_enabled_metrics(): void
    {
        $custom = ['wordpress_info', 'wordpress_users_total'];
        GlobalFunctionState::$options['wp_prometheus_enabled_metrics'] = $custom;

        Installer::activate();

        $this->assertSame(
            $custom,
            GlobalFunctionState::$options['wp_prometheus_enabled_metrics']
        );
    }

    // ── deactivate() ─────────────────────────────────────────────────

    #[Test]
    public function deactivate_flushes_rewrite_rules(): void
    {
        Installer::deactivate();

        $this->assertGreaterThanOrEqual(
            1,
            GlobalFunctionState::getCallCount('flush_rewrite_rules')
        );
    }

    // ── uninstall() ──────────────────────────────────────────────────

    #[Test]
    public function uninstall_removes_all_plugin_options(): void
    {
        // Set up options that should be cleaned.
        $expected_options = [
            'wp_prometheus_activated',
            'wp_prometheus_license_key',
            'wp_prometheus_license_server_url',
            'wp_prometheus_license_server_secret',
            'wp_prometheus_license_status',
            'wp_prometheus_license_data',
            'wp_prometheus_license_last_check',
            'wp_prometheus_auth_token',
            'wp_prometheus_enable_default_metrics',
            'wp_prometheus_enabled_metrics',
            'wp_prometheus_runtime_metrics',
            'wp_prometheus_custom_metrics',
            'wp_prometheus_isolated_mode',
            'wp_prometheus_storage_adapter',
            'wp_prometheus_redis_host',
            'wp_prometheus_redis_port',
            'wp_prometheus_redis_password',
            'wp_prometheus_redis_database',
            'wp_prometheus_redis_prefix',
            'wp_prometheus_apcu_prefix',
        ];

        foreach ($expected_options as $option) {
            GlobalFunctionState::$options[$option] = 'test_value';
        }

        Installer::uninstall();

        // Verify all options were deleted.
        foreach ($expected_options as $option) {
            $this->assertArrayNotHasKey(
                $option,
                GlobalFunctionState::$options,
                "Option '$option' was not deleted during uninstall"
            );
        }
    }

    #[Test]
    public function uninstall_removes_license_transient(): void
    {
        Installer::uninstall();

        $this->assertGreaterThanOrEqual(
            1,
            GlobalFunctionState::getCallCount('delete_transient')
        );

        // Verify the specific transient was targeted.
        $args = GlobalFunctionState::$callArgs['delete_transient'] ?? [];
        $transientNames = array_column($args, 0);
        $this->assertContains('wp_prometheus_license_check', $transientNames);
    }

    #[Test]
    public function uninstall_delete_option_call_count_matches(): void
    {
        Installer::uninstall();

        // Should call delete_option for each option in the list (20 options).
        $this->assertSame(
            20,
            GlobalFunctionState::getCallCount('delete_option')
        );
    }
}