<?php
require_once __DIR__ . '/../../db/config.php';

class CategoryController {

    public function index() {
        $pdo = db();
        $stmt = $pdo->query("SELECT * FROM categories ORDER BY name");
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    public function store($name) {
        $slug = $this->slugify($name);
        $pdo = db();
        try {
            $stmt = $pdo->prepare("INSERT INTO categories (name, slug) VALUES (?, ?)");
            $stmt->execute([$name, $slug]);
            return ['success' => true];
        } catch (PDOException $e) {
            if ($e->errorInfo[1] == 1062) { // Duplicate entry
                return ['success' => false, 'message' => 'Uma categoria com este nome ou slug já existe.'];
            }
            return ['success' => false, 'message' => 'Erro ao criar categoria.'];
        }
    }

    public function show($id) {
        $pdo = db();
        $stmt = $pdo->prepare("SELECT * FROM categories WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->fetch(PDO::FETCH_ASSOC);
    }

    public function update($id, $name) {
        $slug = $this->slugify($name);
        $pdo = db();
        try {
            $stmt = $pdo->prepare("UPDATE categories SET name = ?, slug = ? WHERE id = ?");
            $stmt->execute([$name, $slug, $id]);
            return ['success' => true];
        } catch (PDOException $e) {
            if ($e->errorInfo[1] == 1062) {
                return ['success' => false, 'message' => 'Uma categoria com este nome ou slug já existe.'];
            }
            return ['success' => false, 'message' => 'Erro ao atualizar categoria.'];
        }
    }

    public function destroy($id) {
        $pdo = db();
        $stmt = $pdo->prepare("DELETE FROM categories WHERE id = ?");
        $stmt->execute([$id]);
        return ['success' => true];
    }

    private function slugify($text) {
        $text = preg_replace('~[\pL\d]+~u', '-', $text);
        $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
        $text = preg_replace('~[^\w]+~u', '-', $text);
        $text = trim($text, '-');
        $text = preg_replace('~-~', '-', $text);
        $text = strtolower($text);
        if (empty($text)) {
            return 'n-a';
        }
        return $text;
    }
}