<?php

use Intervention\Image\ImageManager;

class ImageProcessor {
    private $manager;
    private $uploadPath;

    public function __construct() {
        $this->manager = new ImageManager(['driver' => 'gd']);
        $this->uploadPath = __DIR__ . '/../uploads';
    }

    public function process($file, $type = 'product', $width = 800, $height = null) {
        // Validate file
        if (!isset($file['tmp_name']) || !is_uploaded_file($file['tmp_name'])) {
            throw new Exception('No file uploaded');
        }

        // Create type directory if it doesn't exist
        $targetDir = $this->uploadPath . '/' . $type;
        if (!file_exists($targetDir)) {
            mkdir($targetDir, 0755, true);
        }

        // Generate unique filename
        $filename = uniqid() . '_' . time() . '.' . pathinfo($file['name'], PATHINFO_EXTENSION);
        $targetPath = $targetDir . '/' . $filename;

        // Process image
        $image = $this->manager->make($file['tmp_name']);

        // Resize image
        if ($height) {
            $image->fit($width, $height, function ($constraint) {
                $constraint->aspectRatio();
                $constraint->upsize();
            });
        } else {
            $image->resize($width, null, function ($constraint) {
                $constraint->aspectRatio();
                $constraint->upsize();
            });
        }

        // Optimize and save
        $image->save($targetPath, 85);

        // Create thumbnail
        $this->createThumbnail($image, $type, $filename);

        return [
            'filename' => $filename,
            'path' => $type . '/' . $filename,
            'thumbnail' => $type . '/thumbnails/' . $filename
        ];
    }

    private function createThumbnail($image, $type, $filename) {
        $thumbDir = $this->uploadPath . '/' . $type . '/thumbnails';
        if (!file_exists($thumbDir)) {
            mkdir($thumbDir, 0755, true);
        }

        $image->fit(200, 200, function ($constraint) {
            $constraint->aspectRatio();
        })->save($thumbDir . '/' . $filename, 85);
    }

    public function delete($path) {
        $fullPath = $this->uploadPath . '/' . $path;
        if (file_exists($fullPath)) {
            unlink($fullPath);

            // Delete thumbnail if exists
            $thumbPath = dirname($fullPath) . '/thumbnails/' . basename($fullPath);
            if (file_exists($thumbPath)) {
                unlink($thumbPath);
            }
            return true;
        }
        return false;
    }
}