<?php

namespace Controller;

use Framework\Controller;
use Infrastructure\Persistence\PromptsRepository;

class PromptsController extends Controller
{
    private PromptsRepository $promptsRepo;

    private const PROMPT_TYPES = [
        'critic' => 'Critic-Prompt',
        'generate' => 'Generierungs-Prompt',
        'revise' => 'Revisions-Prompt',
        'system' => 'System-Prompt',
        'other' => 'Sonstiges',
    ];

    public function __construct(?PromptsRepository $promptsRepo = null)
    {
        $this->promptsRepo = $promptsRepo ?? new PromptsRepository();
    }

    public function index(): void
    {
        $this->view('prompts.index', [
            'title' => 'Prompts verwalten',
            'prompts' => $this->promptsRepo->findAll(),
            'stats' => $this->promptsRepo->getStatistics(),
            'promptTypes' => self::PROMPT_TYPES,
        ]);
    }

    public function promptsNew(): void
    {
        $this->view('prompts.form', [
            'title' => 'Neuer Prompt',
            'prompt' => null,
            'promptTypes' => self::PROMPT_TYPES,
            'isEdit' => false,
        ]);
    }

    public function store(): void
    {
        $this->requireCsrf();

        $name = trim($_POST['name'] ?? '');
        $version = trim($_POST['version'] ?? '1.0');
        $content = $_POST['content'] ?? '';
        $isActive = isset($_POST['is_active']) ? 1 : 0;

        if ($name === '' || $content === '') {
            $_SESSION['error'] = 'Name und Inhalt sind erforderlich.';
            header('Location: /prompts/new');
            exit;
        }

        $id = $this->promptsRepo->create($name, $version, $content, $isActive);

        $_SESSION['success'] = 'Prompt erfolgreich erstellt.';
        header('Location: /prompts/' . $id);
        exit;
    }

    public function show(string $id): void
    {
        $prompt = $this->promptsRepo->findById((int) $id);
        if ($prompt === null) {
            $this->notFound('Prompt nicht gefunden');
        }

        $this->view('prompts.show', [
            'title' => $prompt['name'],
            'prompt' => $prompt,
            'linkedCritics' => $this->promptsRepo->findLinkedCritics((int) $id),
            'promptTypes' => self::PROMPT_TYPES,
        ]);
    }

    public function edit(string $id): void
    {
        $prompt = $this->promptsRepo->findById((int) $id);
        if ($prompt === null) {
            $this->notFound('Prompt nicht gefunden');
        }

        $this->view('prompts.form', [
            'title' => 'Bearbeiten: ' . $prompt['name'],
            'prompt' => $prompt,
            'promptTypes' => self::PROMPT_TYPES,
            'isEdit' => true,
        ]);
    }

    public function update(string $id): void
    {
        $this->requireCsrf();

        $prompt = $this->promptsRepo->findById((int) $id);
        if ($prompt === null) {
            $this->notFound('Prompt nicht gefunden');
        }

        $name = trim($_POST['name'] ?? '');
        $version = trim($_POST['version'] ?? $prompt['version']);
        $content = $_POST['content'] ?? '';
        $isActive = isset($_POST['is_active']) ? 1 : 0;

        if ($name === '' || $content === '') {
            $_SESSION['error'] = 'Name und Inhalt sind erforderlich.';
            header('Location: /prompts/' . $id . '/edit');
            exit;
        }

        $this->promptsRepo->update((int) $id, $name, $version, $content, $isActive);

        $_SESSION['success'] = 'Prompt aktualisiert.';
        header('Location: /prompts/' . $id);
        exit;
    }

    public function delete(string $id): void
    {
        $this->requireCsrf();

        $prompt = $this->promptsRepo->findById((int) $id);
        if ($prompt === null) {
            $this->notFound('Prompt nicht gefunden');
        }

        $criticCount = $this->promptsRepo->countLinkedCritics((int) $id);
        if ($criticCount > 0) {
            $_SESSION['error'] = "Kann nicht gelöscht werden: {$criticCount} Critics verknüpft.";
            header('Location: /prompts/' . $id);
            exit;
        }

        $this->promptsRepo->delete((int) $id);

        $_SESSION['success'] = 'Prompt gelöscht.';
        header('Location: /prompts');
        exit;
    }

    public function duplicate(string $id): void
    {
        $this->requireCsrf();

        $prompt = $this->promptsRepo->findById((int) $id);
        if ($prompt === null) {
            $this->notFound('Prompt nicht gefunden');
        }

        $newName = $prompt['name'] . ' (Kopie)';
        $newId = $this->promptsRepo->duplicate((int) $id, $newName, '1.0');

        $_SESSION['success'] = 'Prompt dupliziert.';
        header('Location: /prompts/' . $newId . '/edit');
        exit;
    }
}