<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit;

use Brain\Monkey\Actions;
use Brain\Monkey\Filters;
use Brain\Monkey\Functions;
use LIT\MCP\Abilities\ExposurePolicy;
use LIT\MCP\Abilities\ToolAvailability;
use LIT\MCP\Admin\CompatibilityTab;
use LIT\MCP\Admin\SettingsPage;
use LIT\MCP\Compatibility\CapabilityGate;
use LIT\MCP\Compatibility\Compatibility;
use LIT\MCP\Compatibility\Profile;
use LIT\MCP\Compatibility\Tier;
use LIT\MCP\Integrations\Divi\Release\DiviFeatureGate;
use LIT\MCP\Integrations\Pods\PodsFeature;
use LIT\MCP\Integrations\Pods\PodsFieldSource;
use LIT\MCP\Integrations\WordPress\Schema\RegisteredMetaSource;
use LIT\MCP\Integrations\WordPress\Schema\SampledMetaSource;
use LIT\MCP\Integrations\Core\SiteStatusAbility;
use LIT\MCP\Access;
use ReflectionProperty;
use WP_User;
use LIT\MCP\Integrations\IntegrationRegistry;
use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
use LIT\MCP\Limits;
use LIT\MCP\Plugin;
use LIT\MCP\Tests\Support\FakeChangeLog;
use Mockery;

/** The wiring of the composition root: Plugin::integrations() and the steps Plugin::boot() takes with it. */
final class PluginTest extends TestCase
{
    private static function registry(ToolAvailability $tools = new ToolAvailability()): IntegrationRegistry
    {
        return Plugin::integrations(
            Mockery::mock(ContentSchema::class),
            FakeChangeLog::forbidden(),
            new Limits(),
            $tools
        );
    }

    /** Registry order = order of the Tools tab, the guide and the server instructions. */
    public function testIntegrationsInRegistryOrder(): void
    {
        self::assertSame(
            ['core', 'wordpress', 'media', 'divi', 'divi-library', 'divi-theme-builder', 'pods'],
            self::registry()->ids()
        );
    }

    /** Only Divi has boot steps (upgrader hook, compat listener, admin extras); a second boot registers nothing twice. */
    public function testTheBootableIntegrationsBootExactlyOnce(): void
    {
        Actions\expectAdded('upgrader_process_complete')->once();
        Actions\expectAdded('lit_mcp_compat_changed')->once();
        Filters\expectAdded(SettingsPage::TABS_FILTER)->never();
        Actions\expectAdded(CompatibilityTab::LOAD_ACTION)->once();
        Actions\expectAdded(CompatibilityTab::EXTRA_ACTION)->once();
        Filters\expectAdded(CompatibilityTab::COLUMNS_FILTER)->once();
        $registry = self::registry();

        $registry->boot();
        $registry->boot();
    }

    /**
     * No temporal coupling: building and booting the integrations never asks the Tools-tab state (an unbound
     * ToolAvailability throws when asked); bound afterwards, it answers from the bound policy.
     */
    public function testTheToolsTabStateIsAskedOnlyAfterBind(): void
    {
        Functions\stubTranslationFunctions();
        $tools = new ToolAvailability();
        $registry = self::registry($tools);
        $registry->boot();

        $tools->bind($registry, new ExposurePolicy(['@group:divi-library' => ExposurePolicy::DISABLED]));

        self::assertFalse($tools->groupEnabled('divi-library'));
        self::assertTrue($tools->groupWritable('divi-theme-builder'));
        self::assertFalse($tools->allows('lit/divi-insert'), 'no Divi in unit tests: lit/divi-insert not registered');
    }

    /** Pods has no tools: it is in the registry for its profile only and shows up as no group. */
    public function testPodsIsRegisteredWithoutBecomingAToolGroup(): void
    {
        $registry = self::registry();

        self::assertContains('pods', $registry->ids());
        self::assertArrayNotHasKey('pods', $registry->grouped());
    }

    /** lit-site-status keeps its order: Divi, Pods, The Events Calendar. */
    public function testSiteStatusListsDiviPodsAndTheEventsCalendarInThatOrder(): void
    {
        Functions\when('get_bloginfo')->justReturn('x');
        Functions\when('home_url')->justReturn('https://example.test');
        Functions\when('wp_get_current_user')->justReturn(new WP_User(1, ['administrator']));
        Functions\when('get_option')->justReturn(['administrator']);
        Functions\when('apply_filters')->returnArg(2);
        $theme = Mockery::mock();
        $theme->allows('get_template')->andReturn('twentytwentyfive');
        Functions\when('wp_get_theme')->justReturn($theme);
        $status = array_values(array_filter(
            self::registry()->abilities(),
            static fn ($ability): bool => $ability instanceof SiteStatusAbility
        ))[0];

        $components = $status->execute([])['components'];

        self::assertSame(['divi', 'pods', 'the-events-calendar'], array_column($components, 'id'));
        $pods = array_column($components, null, 'id')['pods'];
        self::assertFalse($pods['active'], 'no Pods in unit tests');
        self::assertSame([], $pods['problems']);
    }

    public function testTheCompatibilityCoversAllProfilesWithoutIdCollision(): void
    {
        $compat = self::registry()->compatibility();

        self::assertSame(['divi', 'pods'], array_map(static fn (Profile $p): string => $p->id, $compat->profiles()));
        self::assertNotNull($compat->capability('page-write'));
        self::assertNotNull($compat->capability('pods-field-read'));
        self::assertSame('divi', $compat->owner($compat->capability('page-write'))?->id);
        self::assertSame('pods', $compat->owner($compat->capability('pods-field-write'))?->id);
        self::assertNull($compat->capability('nobody-knows-me'));
    }

    /** The lock of unknown IDs lives in CapabilityGate: without it a core tool with an odd ID would run unlocked. */
    public function testBothGuardsAreWiredDiviFirst(): void
    {
        $guards = Plugin::guards(self::registry(), FakeChangeLog::forbidden());

        self::assertCount(2, $guards);
        self::assertInstanceOf(DiviFeatureGate::class, $guards[0]);
        self::assertInstanceOf(CapabilityGate::class, $guards[1]);
    }

    /** The tab "Compatibility" gets the registry's Compatibility: one section per profile, Divi and Pods. */
    public function testTheCompatibilityTabShowsEveryProfileOfTheRegistry(): void
    {
        Functions\stubEscapeFunctions();
        Functions\stubTranslationFunctions();
        $theme = Mockery::mock();
        $theme->allows('get_template')->andReturn('twentytwentyfive');
        Functions\when('wp_get_theme')->justReturn($theme);
        $tab = Plugin::compatibilityTab(self::registry(), FakeChangeLog::forbidden());

        ob_start();
        $tab->render();
        $html = (string) ob_get_clean();

        self::assertInstanceOf(CompatibilityTab::class, $tab);
        self::assertSame('compatibility', $tab->slug());
        self::assertStringContainsString('id="lit-mcp-compat-divi"', $html);
        self::assertStringContainsString('id="lit-mcp-compat-pods"', $html);
    }

    private static function readOnly(object $source): bool
    {
        return (new ReflectionProperty($source, 'readOnly'))->getValue($source);
    }

    private static function podsCompat(bool $usable): Compatibility
    {
        return new Compatibility([new Profile(
            id: 'pods',
            label: 'Pods',
            tier: Tier::LockOnFailure,
            capabilities: PodsFeature::cases(),
            active: static fn (): bool => $usable
        )]);
    }

    public function testWithoutPodsTheMetaSourcesStayWritableAndPodsIsNotASource(): void
    {
        $sources = Plugin::schemaSources(self::podsCompat(false), false);

        self::assertCount(2, $sources);
        self::assertInstanceOf(RegisteredMetaSource::class, $sources[0]);
        self::assertInstanceOf(SampledMetaSource::class, $sources[1]);
        self::assertFalse(self::readOnly($sources[0]));
        self::assertFalse(self::readOnly($sources[1]));
    }

    public function testWithUsablePodsItsSourceComesFirstAndTheMetaSourcesStayWritable(): void
    {
        $sources = Plugin::schemaSources(self::podsCompat(true), true);

        self::assertInstanceOf(PodsFieldSource::class, $sources[0]);
        self::assertFalse(self::readOnly($sources[1]));
        self::assertFalse(self::readOnly($sources[2]));
    }

    /** Pods active but its schema locked: its meta keys must not be written past Pods. */
    public function testWithActiveButLockedPodsTheMetaSourcesAreReadOnly(): void
    {
        $sources = Plugin::schemaSources(self::podsCompat(false), true);

        self::assertInstanceOf(PodsFieldSource::class, $sources[0]);
        self::assertTrue(self::readOnly($sources[1]));
        self::assertTrue(self::readOnly($sources[2]));
    }
}