<?php
/**
 * Admin Controller for AddLivePhoto Module
 */

class AdminAddLivePhotoController extends ModuleAdminController
{
    public function __construct()
    {
        $this->bootstrap = true;
        $this->display = 'view'; // Force custom view
        parent::__construct();
    }

    public function initContent()
    {
        // Не викликаємо parent::initContent(), бо нам не потрібен стандартний список
        // Але нам потрібен header і footer адмінки
        $this->context->smarty->assign([
            'content' => $this->renderView(), // Це вставить наш tpl
        ]);
        
        // Викликаємо батьківський метод для відображення структури адмінки
        parent::initContent();
    }

    public function renderView()
    {
        $ajax_url = $this->context->link->getAdminLink(
            'AdminAddLivePhoto',
            true,
            [],
            ['ajax' => 1]
        );

        $this->context->smarty->assign([
            'ajax_url' => $ajax_url,
            'module_dir' => _MODULE_DIR_ . $this->module->name . '/',
        ]);

        return $this->context->smarty->fetch($this->module->getLocalPath() . 'views/templates/admin/uploader.tpl');
    }

    public function ajaxProcess()
    {
        $action = Tools::getValue('action');
        
        try {
            switch ($action) {
                case 'searchProduct':
                    $this->processSearchProduct();
                    break;
                case 'uploadImage':
                    $this->processUploadImage();
                    break;
                case 'deleteImage':
                    $this->processDeleteFreshImage();
                    break;
                default:
                    throw new Exception('Unknown action');
            }
        } catch (Exception $e) {
            $this->jsonResponse(['success' => false, 'message' => $e->getMessage()]);
        }
        exit;
    }

    protected function processSearchProduct()
    {
        $identifier = trim(Tools::getValue('identifier'));
        if (empty($identifier)) {
            throw new Exception($this->trans('Please enter a barcode or ID.', [], 'Modules.Addlivephoto.Admin'));
        }

        $id_product = 0;
        // 1. Спробуємо знайти по EAN13
        $sql = 'SELECT id_product FROM `' . _DB_PREFIX_ . 'product` WHERE ean13 = "'.pSQL($identifier).'"';
        $id_by_ean = Db::getInstance()->getValue($sql);

        if ($id_by_ean) {
            $id_product = (int)$id_by_ean;
        } elseif (is_numeric($identifier)) {
            // 2. Якщо це число, пробуємо як ID
            $id_product = (int)$identifier;
        }

        $product = new Product($id_product, false, $this->context->language->id);
        
        if (!Validate::isLoadedObject($product)) {
            throw new Exception($this->trans('Product not found.', [], 'Modules.Addlivephoto.Admin'));
        }

        // Отримуємо існуючі фото
        $existing_photos = $this->getLivePhotos($product->id);

        $this->jsonResponse([
            'success' => true,
            'data' => [
                'id_product' => $product->id,
                'name' => $product->name,
                'reference' => $product->reference,
                'ean13' => $product->ean13,
                'existing_photos' => $existing_photos
            ]
        ]);
    }

    protected function processUploadImage()
    {
        $id_product = (int)Tools::getValue('id_product');
        $rawImage = Tools::getValue('imageData'); // base64 string
        $imageType = Tools::getValue('image_type'); // expiry або packaging

        if (!$id_product || !$rawImage) {
            throw new Exception('Missing ID or Image Data');
        }

        if (!in_array($imageType, ['expiry', 'packaging'])) {
            $imageType = 'expiry'; // Fallback
        }

        // Clean Base64
        if (preg_match('/^data:image\/(\w+);base64,/', $rawImage, $type)) {
            $rawImage = substr($rawImage, strpos($rawImage, ',') + 1);
            $type = strtolower($type[1]); // jpg, png, webp
            
            if (!in_array($type, ['jpg', 'jpeg', 'png', 'webp'])) {
                throw new Exception('Invalid image type');
            }
            
            $rawImage = base64_decode($rawImage);
            if ($rawImage === false) {
                throw new Exception('Base64 decode failed');
            }
        } else {
             throw new Exception('Did not match data URI with image data');
        }

        // Generate Filename
        $filename = uniqid() . '.webp'; // Save as WebP usually
        $path = $this->module->getProductImageServerPath($id_product);
        
        if (!$path) {
            throw new Exception('Could not create directory');
        }

        // Save File
        if (!file_put_contents($path . $filename, $rawImage)) {
            throw new Exception('Failed to write file to disk');
        }

        // Save to DB
        $res = Db::getInstance()->insert('add_live_photo', [
            'id_product' => $id_product,
            'image_name' => pSQL($filename),
            'image_type' => pSQL($imageType),
            'date_add' => date('Y-m-d H:i:s'),
        ]);

        if (!$res) {
            @unlink($path . $filename); // Cleanup
            throw new Exception('Database insert error');
        }

        $photoUrl = $this->module->getProductImageUri($id_product, $filename);

        $this->jsonResponse([
            'success' => true, 
            'message' => 'Saved successfully!',
            'photo' => [
                'name' => $filename,
                'url' => $photoUrl,
                'type' => $imageType
            ]
        ]);
    }

    protected function processDeleteFreshImage()
    {
        $id_product = (int)Tools::getValue('id_product');
        $image_name = Tools::getValue('image_name');

        if ($this->module->deleteProductImage($id_product, $image_name)) {
            $this->jsonResponse(['success' => true, 'message' => 'Deleted']);
        } else {
            throw new Exception('Delete failed');
        }
    }

    private function getLivePhotos($id_product)
    {
        $sql = new DbQuery();
        $sql->select('*');
        $sql->from('add_live_photo');
        $sql->where('id_product = ' . (int)$id_product);
        $sql->orderBy('date_add DESC');
        
        $res = Db::getInstance()->executeS($sql);
        $photos = [];
        if ($res) {
            foreach($res as $row) {
                $photos[] = [
                    'name' => $row['image_name'],
                    'type' => isset($row['image_type']) ? $row['image_type'] : 'expiry',
                    'url' => $this->module->getProductImageUri($id_product, $row['image_name'])
                ];
            }
        }
        return $photos;
    }

    private function jsonResponse($data)
    {
        header('Content-Type: application/json');
        echo json_encode($data);
        exit;
    }
}