<?php

namespace Tests\Unit;

use App\Models\Article;
use App\Models\Ticket;
use App\Services\AppSettingsService;
use App\Services\SupportReplyService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\Fakes\FakeLlmClient;
use Tests\Fakes\FakeTicketProcessingLoggerService;
use Tests\TestCase;

class SupportReplyServiceTest extends TestCase
{
    use RefreshDatabase;

    public function test_it_returns_llm_response_when_available(): void
    {
        $llm = new FakeLlmClient;
        $llm->responses = ['1. Doe X'];

        $service = new SupportReplyService(
            $this->fakeSettings(),
            $llm,
            new FakeTicketProcessingLoggerService
        );

        $ticket = Ticket::query()->create(['message' => 'vraag', 'normalized_message' => 'vraag']);
        $article = Article::query()->create(['title' => 'DNS', 'content' => 'steps']);

        $reply = $service->build($ticket, $article, 'relevant');

        $this->assertSame('1. Doe X', $reply);
        $this->assertStringContainsString('Gebruikersvraag (genormaliseerd): vraag', $llm->generatedPrompts[0]['prompt']);
        $this->assertStringContainsString('spreek de klant consequent informeel aan met je/jij/jouw', $llm->generatedPrompts[0]['prompt']);
    }

    public function test_it_falls_back_when_llm_returns_empty(): void
    {
        $llm = new FakeLlmClient;
        $llm->responses = [''];

        $service = new SupportReplyService(
            $this->fakeSettings(),
            $llm,
            new FakeTicketProcessingLoggerService
        );

        $ticket = Ticket::query()->create(['message' => 'vraag']);
        $article = Article::query()->create(['title' => 'DNS', 'content' => 'steps']);

        $reply = $service->build($ticket, $article, 'relevant');

        $this->assertStringContainsString('Gebruik het kennisbankartikel', $reply);
    }

    public function test_it_includes_formal_addressing_instruction_when_configured(): void
    {
        $llm = new FakeLlmClient;
        $llm->responses = ['1. Doe X'];

        $service = new SupportReplyService(
            $this->fakeSettings('u'),
            $llm,
            new FakeTicketProcessingLoggerService
        );

        $ticket = Ticket::query()->create(['message' => 'vraag', 'normalized_message' => 'vraag']);
        $article = Article::query()->create(['title' => 'DNS', 'content' => 'steps']);

        $service->build($ticket, $article, 'relevant');

        $this->assertStringContainsString('spreek de klant consequent formeel aan met u/uw', $llm->generatedPrompts[0]['prompt']);
        $this->assertStringContainsString('Gebruik geen je/jij/jouw', $llm->generatedPrompts[0]['prompt']);
    }

    private function fakeSettings(string $tone = 'je'): AppSettingsService
    {
        return new class($tone) extends AppSettingsService
        {
            public function __construct(private readonly string $tone) {}

            public function get(string $key, ?string $default = null): ?string
            {
                if ($key === 'tone_addressing') {
                    return $this->tone;
                }

                return $default;
            }

            public function getPrompt(string $key, ?string $default = null): ?string
            {
                return 'Prompt';
            }
        };
    }
}