<?php
namespace App\Helpers;

class ImageHelper {
    
    public static function resizeImage($source, $target, $maxWidth, $maxHeight, $quality = 90) {
        if (!file_exists($source)) {
            return false;
        }
        
        $imageInfo = getimagesize($source);
        if ($imageInfo === false) {
            return false;
        }
        
        list($width, $height, $type) = $imageInfo;
        
        // If image is smaller than max dimensions, just copy it
        if ($width <= $maxWidth && $height <= $maxHeight) {
            return copy($source, $target);
        }
        
        // Calculate new dimensions maintaining aspect ratio
        $ratio = min($maxWidth / $width, $maxHeight / $height);
        $newWidth = (int)($width * $ratio);
        $newHeight = (int)($height * $ratio);
        
        // Create source image resource
        $sourceImage = null;
        switch ($type) {
            case IMAGETYPE_JPEG:
                $sourceImage = imagecreatefromjpeg($source);
                break;
            case IMAGETYPE_PNG:
                $sourceImage = imagecreatefrompng($source);
                break;
            case IMAGETYPE_GIF:
                $sourceImage = imagecreatefromgif($source);
                break;
            case IMAGETYPE_WEBP:
                $sourceImage = imagecreatefromwebp($source);
                break;
            default:
                return copy($source, $target);
        }
        
        if (!$sourceImage) {
            return false;
        }
        
        // Create destination image
        $destinationImage = imagecreatetruecolor($newWidth, $newHeight);
        
        // Preserve transparency for PNG and GIF
        if ($type === IMAGETYPE_PNG || $type === IMAGETYPE_GIF) {
            imagealphablending($destinationImage, false);
            imagesavealpha($destinationImage, true);
            $transparent = imagecolorallocatealpha($destinationImage, 255, 255, 255, 127);
            imagefilledrectangle($destinationImage, 0, 0, $newWidth, $newHeight, $transparent);
        }
        
        // Resample image
        imagecopyresampled($destinationImage, $sourceImage, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
        
        // Save image
        switch ($type) {
            case IMAGETYPE_JPEG:
                return imagejpeg($destinationImage, $target, $quality);
            case IMAGETYPE_PNG:
                return imagepng($destinationImage, $target, 9);
            case IMAGETYPE_GIF:
                return imagegif($destinationImage, $target);
            case IMAGETYPE_WEBP:
                return imagewebp($destinationImage, $target, $quality);
            default:
                return false;
        }
    }
    
    public static function isImagePortrait($imagePath) {
        if (!file_exists($imagePath)) {
            return false;
        }
        
        $imageInfo = getimagesize($imagePath);
        if ($imageInfo === false) {
            return false;
        }
        
        list($width, $height) = $imageInfo;
        return $height > $width;
    }
    
    public static function isImageLandscape($imagePath) {
        if (!file_exists($imagePath)) {
            return false;
        }
        
        $imageInfo = getimagesize($imagePath);
        if ($imageInfo === false) {
            return false;
        }
        
        list($width, $height) = $imageInfo;
        return $width > $height;
    }
    
    public static function getImageOrientation($imagePath) {
        if (!file_exists($imagePath)) {
            return 'unknown';
        }
        
        $imageInfo = getimagesize($imagePath);
        if ($imageInfo === false) {
            return 'unknown';
        }
        
        list($width, $height) = $imageInfo;
        
        if ($width > $height) {
            return 'landscape';
        } elseif ($height > $width) {
            return 'portrait';
        } else {
            return 'square';
        }
    }
}