<?php
namespace App\Controllers\Admin;

use App\Models\Product;
use App\Models\Category;

class ProductController extends AdminController
{
    private function specsToJson($text): string
    {
        $out = [];
        foreach (explode("\n", $text) as $line) {
            $line = trim($line);
            if (!$line) continue;
            $p = strpos($line, '|');
            if ($p === false) { $out[] = ['k' => $line, 'v' => '']; }
            else { $out[] = ['k' => trim(substr($line, 0, $p)), 'v' => trim(substr($line, $p + 1))]; }
        }
        return json_encode($out, JSON_UNESCAPED_UNICODE);
    }

    public function index()
    {
        $product = new Product();
        return $this->view('admin/products', [
            'products' => $product->all(),
            'seg'      => $this->seg(),
        ]);
    }

    public function create()
    {
        return $this->view('admin/product_form', [
            'p'    => null,
            'cats' => (new Category())->all(),
        ]);
    }

    public function store()
    {
        if (!csrf_check()) { $this->redirect('admin/products'); }
        $product = new Product();
        $cover = $this->uploadFile('cover') ?? $this->post('cover_url', '');
        $id = $product->insert([
            'category_id' => (int)$this->post('category_id'),
            'name'        => $this->post('name'),
            'slug'        => '',
            'cover'       => $cover,
            'summary'     => $this->post('summary'),
            'description' => $this->post('description'),
            'price'       => (float)$this->post('price', 0),
            'specs'       => $this->specsToJson($this->post('specs', '')),
            'gallery'     => '[]',
            'tags'        => $this->post('tags', ''),
            'sort_order'  => (int)$this->post('sort_order', 0),
            'status'      => $this->post('status', 1) ? 1 : 0,
            'created_at'  => date('Y-m-d'),
            'layout'      => $this->post('layout', ''),
        ]);
        // URL 标识留空时按记录序号顺序生成（短、稳定）
        $slug = $this->post('slug') ? slugify($this->post('slug')) : (string)$id;
        $product->update($id, ['slug' => $slug]);
        $this->redirect('admin/products');
    }

    public function edit($id)
    {
        $product = new Product();
        $p = $product->find($id);
        if (!$p) { $this->redirect('admin/products'); }
        $specs = $product->specsArray($p);
        $specText = '';
        foreach ($specs as $s) $specText .= ($s['k'] ?? '') . '|' . ($s['v'] ?? '') . "\n";
        return $this->view('admin/product_form', [
            'p'       => $p,
            'cats'    => (new Category())->all(),
            'specText'=> $specText,
        ]);
    }

    public function update($id)
    {
        if (!csrf_check()) { $this->redirect('admin/products'); }
        $product = new Product();
        $p = $product->find($id);
        if (!$p) { $this->redirect('admin/products'); }
        $cover = $this->uploadFile('cover');
        if (!$cover && $this->post('cover_url')) $cover = $this->post('cover_url');
        if (!$cover) $cover = $p['cover'] ?? '';
        $product->update($id, [
            'category_id' => (int)$this->post('category_id'),
            'name'        => $this->post('name'),
            'slug'        => $this->post('slug') ? slugify($this->post('slug')) : (string)$id,
            'cover'       => $cover,
            'summary'     => $this->post('summary'),
            'description' => $this->post('description'),
            'price'       => (float)$this->post('price', 0),
            'specs'       => $this->specsToJson($this->post('specs', '')),
            'tags'        => $this->post('tags', ''),
            'sort_order'  => (int)$this->post('sort_order', 0),
            'status'      => $this->post('status', 1) ? 1 : 0,
            'layout'      => $this->post('layout', ''),
        ]);
        $this->redirect('admin/products');
    }

    public function delete($id)
    {
        if (csrf_check()) { (new Product())->delete($id); }
        $this->redirect('admin/products');
    }
}