<?php

namespace Controller;

use Framework\Controller;
use UseCases\Command\CreatePromptCommand;
use UseCases\Command\UpdatePromptCommand;
use UseCases\Prompts\ManagePromptsUseCase;

class PromptsController extends Controller
{
    private ManagePromptsUseCase $promptsUseCase;

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

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

    public function index(): void
    {
        $this->view('prompts.index', [
            'title' => 'Prompts verwalten',
            'prompts' => array_map(fn ($dto) => $dto->toArray(), $this->promptsUseCase->getAll()),
            'stats' => $this->promptsUseCase->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();

        $command = CreatePromptCommand::fromRequest($_POST);
        $errors = $command->validate();

        if ($errors !== []) {
            $_SESSION['error'] = implode(' ', $errors);
            header('Location: /prompts/new');
            exit;
        }

        $result = $this->promptsUseCase->create(
            name: $command->name,
            version: $command->version,
            content: $command->content,
            isActive: $command->isActive
        );

        if (!$result->success) {
            $_SESSION['error'] = $result->message;
            header('Location: /prompts/new');
            exit;
        }

        $_SESSION['success'] = $result->message;
        header('Location: /prompts/' . $result->id);
        exit;
    }

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

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

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

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

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

        $command = UpdatePromptCommand::fromRequest((int) $id, $_POST);
        $errors = $command->validate();

        if ($errors !== []) {
            $_SESSION['error'] = implode(' ', $errors);
            header('Location: /prompts/' . $id . '/edit');
            exit;
        }

        $result = $this->promptsUseCase->update(
            id: $command->id,
            name: $command->name,
            version: $command->version,
            content: $command->content,
            isActive: $command->isActive
        );

        if (!$result->success) {
            $_SESSION['error'] = $result->message;
            header('Location: /prompts/' . $id . '/edit');
            exit;
        }

        $_SESSION['success'] = $result->message;
        header('Location: /prompts/' . $id);
        exit;
    }

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

        $result = $this->promptsUseCase->delete((int) $id);

        if (!$result->success) {
            $_SESSION['error'] = $result->message;
            header('Location: /prompts/' . $id);
            exit;
        }

        $_SESSION['success'] = $result->message;
        header('Location: /prompts');
        exit;
    }

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

        $result = $this->promptsUseCase->duplicate((int) $id);

        if (!$result->success) {
            $_SESSION['error'] = $result->message;
            header('Location: /prompts/' . $id);
            exit;
        }

        $_SESSION['success'] = $result->message;
        header('Location: /prompts/' . $result->id . '/edit');
        exit;
    }
}