<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Guides;

use LIT\MCP\Abilities\Ability;
use LIT\MCP\Abilities\ExposurePolicy;
use LIT\MCP\Guides\InstructionsBuilder;
use LIT\MCP\Integrations\Integration;
use LIT\MCP\Integrations\IntegrationRegistry;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;

final class InstructionsBuilderTest extends TestCase
{
    private function ability(string $name, bool $direct): Ability
    {
        $ability = Mockery::mock(Ability::class);
        $ability->allows('name')->andReturn($name);
        $ability->allows('isDirect')->andReturn($direct);

        return $ability;
    }

    private function coreWith(Ability ...$abilities): Integration
    {
        $core = Mockery::mock(Integration::class);
        $core->allows('id')->andReturn('core');
        $core->allows('isAvailable')->andReturn(true);
        $core->allows('abilities')->andReturn(array_values($abilities));

        return $core;
    }

    public function testNamesActiveIntegrationsAndCoreRules(): void
    {
        $core = $this->coreWith($this->ability('lit/guide', true), $this->ability('lit/menu-list', false));

        $text = (new InstructionsBuilder(new IntegrationRegistry($core)))->build();

        self::assertStringContainsString('Aktive Integrationen: core', $text);
        self::assertStringContainsString('lit-guide', $text);
        self::assertStringContainsString('Status', $text);
        self::assertLessThan(2000, strlen($text), 'Instructions must stay short – they are loaded in every conversation.');
    }

    public function testListsPostTypesWhenAProviderIsGiven(): void
    {
        $core = $this->coreWith($this->ability('lit/guide', true));

        $text = (new InstructionsBuilder(new IntegrationRegistry($core), static fn (): array => ['page', 'post']))->build();

        self::assertStringContainsString('Inhaltstypen: page, post', $text);
        self::assertStringContainsString('lit-content-types', $text);
        self::assertStringContainsString('confirm: true', $text);
    }

    public function testListsTheCurrentlyDirectToolsByToolNameAndNamesTheRestNeutrally(): void
    {
        $core = $this->coreWith(
            $this->ability('lit/guide', true),
            $this->ability('lit/menu-list', false)
        );

        $text = (new InstructionsBuilder(new IntegrationRegistry($core)))->build();

        self::assertStringContainsString('Direkt aufrufbare Tools: lit-guide', $text);
        self::assertStringContainsString('mcp-adapter-execute-ability', $text);
        self::assertStringNotContainsString('lit-menu-list', $text);
    }

    public function testDirectToolListReflectsExposurePolicyOverrides(): void
    {
        $core = $this->coreWith(
            $this->ability('lit/guide', true),
            $this->ability('lit/menu-list', false)
        );
        $policy = new ExposurePolicy(['lit/menu-list' => 'direct']);

        $text = (new InstructionsBuilder(new IntegrationRegistry($core), null, $policy))->build();

        self::assertStringContainsString('lit-menu-list', $text);
    }
}