<?php

declare(strict_types=1);

namespace Steuerkram\Controllers;

use Steuerkram\Models\Supplier;
use Steuerkram\View;

class SupplierController extends BaseController
{
    public function index(array $params): void
    {
        $suppliers = Supplier::all();

        $view = new View();
        $view->render('layout/base.php', [
            'pageTitle'     => 'Lieferanten',
            'content'       => $this->renderView('suppliers/list', [
                'suppliers' => $suppliers,
            ]),
            'topbarActions' => '<a href="/suppliers/new" class="btn btn-primary">+ Lieferant anlegen</a>',
        ]);
    }

    public function create(array $params): void
    {
        $view = new View();
        $view->render('layout/base.php', [
            'pageTitle' => 'Lieferant anlegen',
            'content'   => $this->renderView('suppliers/form', [
                'supplier' => [],
                'errors'   => [],
                'action'   => '/suppliers',
            ]),
        ]);
    }

    public function store(array $params): void
    {
        $name   = trim($_POST['name'] ?? '');
        $errors = [];

        if ($name === '') {
            $errors['name'] = 'Pflichtfeld';
        } elseif (Supplier::findByName($name)) {
            $errors['name'] = 'Dieser Lieferantenname existiert bereits.';
        }

        if ($errors) {
            $view = new View();
            $view->render('layout/base.php', [
                'pageTitle' => 'Lieferant anlegen',
                'content'   => $this->renderView('suppliers/form', [
                    'supplier' => ['name' => $name],
                    'errors'   => $errors,
                    'action'   => '/suppliers',
                ]),
            ]);
            return;
        }

        Supplier::create($name);
        View::redirect('/suppliers', 'Lieferant erfolgreich angelegt.');
    }

    public function edit(array $params): void
    {
        $supplier = Supplier::find((int)$params['id']);
        if (!$supplier) { http_response_code(404); return; }

        $view = new View();
        $view->render('layout/base.php', [
            'pageTitle' => 'Lieferant bearbeiten',
            'content'   => $this->renderView('suppliers/form', [
                'supplier' => $supplier,
                'errors'   => [],
                'action'   => '/suppliers/' . $supplier['id'],
            ]),
        ]);
    }

    public function update(array $params): void
    {
        $id       = (int)$params['id'];
        $supplier = Supplier::find($id);
        if (!$supplier) { http_response_code(404); return; }

        $name   = trim($_POST['name'] ?? '');
        $errors = [];

        if ($name === '') {
            $errors['name'] = 'Pflichtfeld';
        } else {
            $existing = Supplier::findByName($name);
            if ($existing && (int)$existing['id'] !== $id) {
                $errors['name'] = 'Dieser Lieferantenname existiert bereits.';
            }
        }

        if ($errors) {
            $view = new View();
            $view->render('layout/base.php', [
                'pageTitle' => 'Lieferant bearbeiten',
                'content'   => $this->renderView('suppliers/form', [
                    'supplier' => array_merge($supplier, ['name' => $name]),
                    'errors'   => $errors,
                    'action'   => '/suppliers/' . $id,
                ]),
            ]);
            return;
        }

        Supplier::update($id, $name);
        View::redirect('/suppliers', 'Lieferant aktualisiert.');
    }

    public function destroy(array $params): void
    {
        if (!Supplier::delete((int)$params['id'])) {
            View::redirect('/suppliers', 'Lieferant kann nicht gelöscht werden (noch in Belegen verwendet).', 'error');
            return;
        }
        View::redirect('/suppliers', 'Lieferant gelöscht.');
    }

    /**
     * AJAX: Autocomplete-Liste aller Lieferanten als JSON.
     */
    public function search(array $params): void
    {
        $suppliers = Supplier::all();
        header('Content-Type: application/json');
        echo json_encode(array_map(fn($s) => ['id' => $s['id'], 'name' => $s['name']], $suppliers));
    }
}