// Sandbox helper: DDS Showcase gallery dedup + field fill-in + publish.

if ( ! function_exists( 'dds_cleanup_ahash' ) ) {

function dds_cleanup_ahash( $attachment_id, $size = 12 ) {
	$path = get_attached_file( $attachment_id );
	if ( ! $path || ! file_exists( $path ) ) {
		return null;
	}
	$info = @getimagesize( $path );
	if ( ! $info ) {
		return null;
	}
	$mime = $info['mime'];
	switch ( $mime ) {
		case 'image/jpeg':
			$src = @imagecreatefromjpeg( $path );
			break;
		case 'image/png':
			$src = @imagecreatefrompng( $path );
			break;
		case 'image/gif':
			$src = @imagecreatefromgif( $path );
			break;
		case 'image/webp':
			$src = function_exists( 'imagecreatefromwebp' ) ? @imagecreatefromwebp( $path ) : false;
			break;
		default:
			$src = false;
	}
	if ( ! $src ) {
		return null;
	}
	$sw = imagesx( $src );
	$sh = imagesy( $src );
	$small = imagecreatetruecolor( $size, $size );
	imagecopyresampled( $small, $src, 0, 0, 0, 0, $size, $size, $sw, $sh );
	imagedestroy( $src );

	$vals = array();
	$sum  = 0;
	for ( $y = 0; $y < $size; $y++ ) {
		for ( $x = 0; $x < $size; $x++ ) {
			$rgb = imagecolorat( $small, $x, $y );
			$r   = ( $rgb >> 16 ) & 0xFF;
			$g   = ( $rgb >> 8 ) & 0xFF;
			$b   = $rgb & 0xFF;
			$gray = (int) round( 0.299 * $r + 0.587 * $g + 0.114 * $b );
			$vals[] = $gray;
			$sum   += $gray;
		}
	}
	imagedestroy( $small );
	$avg  = $sum / count( $vals );
	$bits = '';
	foreach ( $vals as $v ) {
		$bits .= ( $v > $avg ) ? '1' : '0';
	}
	return $bits;
}

function dds_cleanup_hamming( $a, $b ) {
	if ( $a === null || $b === null || strlen( $a ) !== strlen( $b ) ) {
		return PHP_INT_MAX;
	}
	$d = 0;
	for ( $i = 0, $len = strlen( $a ); $i < $len; $i++ ) {
		if ( $a[ $i ] !== $b[ $i ] ) {
			$d++;
		}
	}
	return $d;
}

/**
 * Infer default tools from free text + fallback category rules.
 */
function dds_cleanup_infer_tools( $text, $categories ) {
	$text = strtolower( remove_accents( $text ) );
	$map  = array(
		'photoshop'        => 'Adobe Photoshop',
		'illustrator'      => 'Adobe Illustrator',
		'indesign'         => 'Adobe InDesign',
		'premier pro'      => 'Adobe Premiere Pro',
		'premiere pro'     => 'Adobe Premiere Pro',
		'after effect'     => 'Adobe After Effects',
		'aftereffect'      => 'Adobe After Effects',
		'lightroom'        => 'Adobe Lightroom',
		'adobe dimension'  => 'Adobe Dimension',
		'adobe animate'    => 'Adobe Animate',
		'adobe xd'         => 'Adobe XD',
		'firefly'          => 'Adobe Firefly',
		'figma'            => 'Figma',
		'canva'            => 'Canva',
		'coreldraw'        => 'CorelDRAW',
		'corel draw'       => 'CorelDRAW',
		'blender'          => 'Blender',
		'cinema 4d'        => 'Cinema 4D',
		'davinci'          => 'DaVinci Resolve',
		'filmora'          => 'Filmora',
		'capcut'           => 'CapCut',
		'audacity'         => 'Audacity',
		'procreate'        => 'Procreate',
		'midjourney'       => 'Midjourney',
		'leonardo'         => 'Leonardo AI',
		'runway'           => 'Runway',
		'luma'             => 'Luma AI',
		'higgsfield'       => 'Higgsfield',
		'kling'            => 'Kling AI',
		'sora'             => 'Sora',
		'veo'              => 'Google Veo',
		'pika'             => 'Pika Labs',
		'hailuo'           => 'Hailuo AI',
		'stable diffusion' => 'Stable Diffusion',
		' flux'            => 'Flux',
		'dall-e'           => "DALL·E",
		'dall e'           => "DALL·E",
		'ideogram'         => 'Ideogram',
		'krea'             => 'Krea AI',
		'magnific'         => 'Magnific AI',
		'topaz'            => 'Topaz Labs',
		'elevenlabs'       => 'ElevenLabs',
		'suno'             => 'Suno AI',
		'udio'             => 'Udio',
		'heygen'           => 'HeyGen',
		'synthesia'        => 'Synthesia',
		'descript'         => 'Descript',
		'freepik'          => 'Freepik AI',
		'recraft'          => 'Recraft',
		'chatgpt'          => 'ChatGPT',
		'voiceover'        => 'AI Voiceover',
		'ai music'         => 'AI Music Generation',
		'ai voice'         => 'AI Voiceover',
	);

	$found = array();
	foreach ( $map as $needle => $label ) {
		if ( false !== strpos( $text, $needle ) ) {
			$found[ $label ] = true;
		}
	}

	if ( $found ) {
		return array_keys( $found );
	}

	$cats = implode( '|', $categories );
	if ( false !== strpos( $cats, '3D дизајн' ) ) {
		return array( '3D моделирање' );
	}
	if ( false !== strpos( $cats, 'Векторски дизајн' ) ) {
		return array( 'Adobe Illustrator' );
	}
	if ( false !== strpos( $cats, 'UI/UX и web' ) ) {
		return array( 'Web Design' );
	}
	if ( false !== strpos( $cats, 'Видео и motion' ) ) {
		return array( 'Adobe Premiere Pro', 'Adobe After Effects' );
	}
	if ( false !== strpos( $cats, 'Лого и брендинг' ) ) {
		return array( 'Adobe Illustrator', 'Brand Identity' );
	}
	return array( 'Adobe Photoshop' );
}

function dds_cleanup_process_project( $post_id, $dry_run = true ) {
	$report = array(
		'post_id'         => $post_id,
		'title'           => get_the_title( $post_id ),
		'removed_orphans' => array(),
		'removed_dupes'   => array(),
		'kept'            => array(),
		'gallery_before'  => 0,
		'gallery_after'   => 0,
		'tools_before'    => array(),
		'tools_after'     => array(),
		'thumbnail_before'=> 0,
		'thumbnail_after' => 0,
	);

	$gallery = get_post_meta( $post_id, '_dds_showcase_gallery', true );
	$gallery = is_array( $gallery ) ? array_map( 'intval', $gallery ) : array();
	$report['gallery_before'] = count( $gallery );
	$thumb_id = (int) get_post_meta( $post_id, '_thumbnail_id', true );
	$report['thumbnail_before'] = $thumb_id;

	$valid = array();
	foreach ( $gallery as $aid ) {
		$p = get_post( $aid );
		if ( $p && 'attachment' === $p->post_type ) {
			$valid[] = $aid;
		} else {
			$report['removed_orphans'][] = $aid;
		}
	}

	$images = array();
	$others = array();
	foreach ( $valid as $aid ) {
		$mime = get_post_mime_type( $aid );
		if ( 0 === strpos( (string) $mime, 'image' ) ) {
			$images[] = $aid;
		} else {
			$others[] = $aid;
		}
	}

	$hash = array();
	$dims = array();
	foreach ( $images as $aid ) {
		$hash[ $aid ] = dds_cleanup_ahash( $aid );
		$meta = wp_get_attachment_metadata( $aid );
		$w    = isset( $meta['width'] ) ? (int) $meta['width'] : 0;
		$h    = isset( $meta['height'] ) ? (int) $meta['height'] : 0;
		$dims[ $aid ] = array( $w, $h, $w * $h );
	}

	$clusters = array();
	$next_cluster = 0;
	$order = $images;
	foreach ( $order as $i => $aid_a ) {
		if ( isset( $clusters[ $aid_a ] ) ) {
			continue;
		}
		$clusters[ $aid_a ] = $next_cluster;
		for ( $j = $i + 1; $j < count( $order ); $j++ ) {
			$aid_b = $order[ $j ];
			if ( isset( $clusters[ $aid_b ] ) ) {
				continue;
			}
			$dist = dds_cleanup_hamming( $hash[ $aid_a ], $hash[ $aid_b ] );
			if ( $dist === PHP_INT_MAX ) {
				continue;
			}
			list( $wa, $ha ) = $dims[ $aid_a ];
			list( $wb, $hb ) = $dims[ $aid_b ];
			$ratio_ok = false;
			if ( $wa > 0 && $ha > 0 && $wb > 0 && $hb > 0 ) {
				$ra = $wa / $ha;
				$rb = $wb / $hb;
				$ratio_ok = ( abs( $ra - $rb ) / max( $ra, $rb ) ) < 0.08;
			}
			if ( $dist <= 8 && $ratio_ok ) {
				$clusters[ $aid_b ] = $clusters[ $aid_a ];
			}
		}
		$next_cluster++;
	}

	$groups = array();
	foreach ( $images as $aid ) {
		$cid = $clusters[ $aid ];
		$groups[ $cid ][] = $aid;
	}

	$final_images = array();
	$removed_dupes = array();
	foreach ( $groups as $cid => $members ) {
		if ( count( $members ) === 1 ) {
			$final_images[] = $members[0];
			continue;
		}
		usort( $members, function( $a, $b ) use ( $dims ) {
			$areaCmp = $dims[ $b ][2] <=> $dims[ $a ][2];
			if ( 0 !== $areaCmp ) {
				return $areaCmp;
			}
			$fa = get_attached_file( $a );
			$fb = get_attached_file( $b );
			$sa = $fa && file_exists( $fa ) ? filesize( $fa ) : 0;
			$sb = $fb && file_exists( $fb ) ? filesize( $fb ) : 0;
			return $sb <=> $sa;
		} );
		$keeper = array_shift( $members );
		$final_images[] = $keeper;
		foreach ( $members as $dupe ) {
			$removed_dupes[] = $dupe;
		}
	}

	$order_index = array_flip( $images );
	usort( $final_images, function( $a, $b ) use ( $order_index ) {
		return $order_index[ $a ] <=> $order_index[ $b ];
	} );

	$report['removed_dupes'] = $removed_dupes;
	$report['kept'] = $final_images;

	$final_gallery = array();
	foreach ( $valid as $aid ) {
		if ( in_array( $aid, $final_images, true ) || in_array( $aid, $others, true ) ) {
			$final_gallery[] = $aid;
		}
	}
	$report['gallery_after'] = count( $final_gallery );

	$new_thumb = $thumb_id;
	if ( in_array( $thumb_id, $removed_dupes, true ) ) {
		$cid = $clusters[ $thumb_id ];
		foreach ( $final_images as $fi ) {
			if ( isset( $clusters[ $fi ] ) && $clusters[ $fi ] === $cid ) {
				$new_thumb = $fi;
				break;
			}
		}
	} elseif ( ! $thumb_id || ( ! get_post( $thumb_id ) ) ) {
		$new_thumb = ! empty( $final_images ) ? $final_images[0] : 0;
	}
	$report['thumbnail_after'] = $new_thumb;

	$tools = get_post_meta( $post_id, '_dds_showcase_tools', true );
	$tools = is_array( $tools ) ? array_filter( $tools ) : array();
	$report['tools_before'] = $tools;
	$new_tools = $tools;
	if ( empty( $tools ) ) {
		$desc = (string) get_post_meta( $post_id, '_dds_showcase_short_description', true );
		$cats = wp_get_post_terms( $post_id, 'dds_showcase_category', array( 'fields' => 'names' ) );
		$cats = is_wp_error( $cats ) ? array() : $cats;
		$new_tools = dds_cleanup_infer_tools( get_the_title( $post_id ) . ' ' . $desc, $cats );
	}
	$report['tools_after'] = $new_tools;

	$platform = (string) get_post_meta( $post_id, '_dds_showcase_platform', true );
	$src_url  = (string) get_post_meta( $post_id, '_dds_showcase_source_url', true );
	$new_platform = $platform;
	if ( '' === $platform ) {
		if ( false !== stripos( $src_url, 'freelancer.com' ) ) {
			$new_platform = 'freelancer';
		} elseif ( false !== stripos( $src_url, 'fiverr.com' ) ) {
			$new_platform = 'fiverr';
		} elseif ( false !== stripos( $src_url, 'upwork.com' ) ) {
			$new_platform = 'upwork';
		} elseif ( '' === $src_url ) {
			$new_platform = 'personal';
		} else {
			$new_platform = 'direct';
		}
	}
	$report['platform_before'] = $platform;
	$report['platform_after']  = $new_platform;

	if ( ! $dry_run ) {
		foreach ( array_unique( $removed_dupes ) as $dead ) {
			if ( get_post( $dead ) ) {
				wp_delete_attachment( $dead, true );
			}
		}
		update_post_meta( $post_id, '_dds_showcase_gallery', array_values( $final_gallery ) );
		if ( $new_thumb ) {
			update_post_meta( $post_id, '_thumbnail_id', $new_thumb );
		} else {
			delete_post_meta( $post_id, '_thumbnail_id' );
		}
		if ( $new_tools !== $tools ) {
			update_post_meta( $post_id, '_dds_showcase_tools', array_values( array_unique( $new_tools ) ) );
		}
		if ( $new_platform !== $platform ) {
			update_post_meta( $post_id, '_dds_showcase_platform', $new_platform );
		}
	}

	return $report;
}

function dds_cleanup_process_batch( $post_ids, $dry_run = true ) {
	$reports = array();
	foreach ( $post_ids as $pid ) {
		$reports[] = dds_cleanup_process_project( (int) $pid, $dry_run );
	}
	return $reports;
}

} // function_exists guard
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