<?php

$basedir = "/home/crowd/pictures/";

$framename = basename($_GET['i']);
$outputnr = (int) $_GET['nr'];
$params = explode(',',$_GET['params']);

$availableParams = array("smile",
	"innerBrowRaise",
	"browRaise",
	"browFurrow",
	"noseWrinkle",
	"upperLipRaise",
	"lipCornerDepressor",
	"chinRaise",
	"lipPucker",
	"lipPress",
	"lipSuck",
	"mouthOpen",
	"smirk",
	"eyeClosure",
	"eyeWiden",
	"cheekRaise",
	"lidTighten",
	"dimpler",
	"lipStretch",
	"jawDrop"
);

foreach($params as $param) {
	if(!in_array($param, $availableParams)) {
		throw new Exception("Invalid param" . $param);
	}
}

$framefile = $basedir ."/".$outputnr ."/".$framename.".jpg";
$framejson  = $basedir ."/".$outputnr ."/".$framename.".json";

$im = imagecreatefromjpeg($framefile);
$json = json_decode(file_get_contents($framejson), true);

$colorFg = imagecolorallocate($im, 255,255,255);

$avg = [];
foreach($params as $param) {
	$values = array_map(function($f) use($param){return $f[$param];}, $json['faces']);
	$avg[$param] = array_sum($values) / count($values);
}

foreach($json['faces'] as &$face) {
	$face['diff'] = 0;
	foreach($params as $param) {
		$face['diff'] += abs($avg[$param] - $face[$param]);
	}
	$face['diff'] = sqrt($face['diff']);
}

usort($json['faces'], function ($f1, $f2) {
    if ($f1['diff'] == $f2['diff']) return 0;
    return $f1['diff'] > $f2['diff'] ? -1 : 1;
});

$targetIm = imagecreatetruecolor(1920, 1080);
$white = imagecolorallocate($targetIm, 255, 255, 255);
imagefill($targetIm, 0, 0, $white);

$i = 0;
$faceDim = 120;
$faceMargin = 20;
$itemsPerRow = (int) 1080 / ($faceDim + $faceMargin);
$maxDiff = sqrt(count($params) * 100);
foreach($json['faces'] as $face) {
	$posX = $i % $itemsPerRow;
	$posY = (int) ($i / $itemsPerRow);
	
	$destX = $posX * ($faceDim + $faceMargin);
	$destY = $posY * ($faceDim + $faceMargin);
	
	imagecopyresampled ( $targetIm , $im , $destX , $destY , (int) $face['rect']['x'] , (int) $face['rect']['y'] , $faceDim , $faceDim , (int) $face['rect']['w'], (int) $face['rect']['h']);
	
	
	$score = ($face['diff'] /  $maxDiff) * 255; // score on 0-100 -> 255 scale for color:
	$colorBg = imagecolorallocate($im, (int) $score, (int) 255 - $score, 0);
    imagettftext($targetIm, 12, 0, $destX, $destY + $faceDim + $faceMargin/1.2, $colorBg, "/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf", round($face['diff'],2));
	$i++;
}

$im = $targetIm;

/*
foreach($json['faces'] as $face) {
	// Draw a rectangle in color representing score on params
	imagecolorallocate($im, 200,200,200);
	$total = 0;
	foreach($params as $param) {
		$total += $face[$param];
	}
	$score = ($total /  count($params)) * 2.55; // score on 0-100 -> 255 scale for color:
	
	$colorBg = imagecolorallocate($im, (int) 255 - $score, (int) $score, 0);
	//~ var_dump($face['rect']);
	//~ imagefilledrectangle($im, $face['rect']['x'], $face['rect']['y'], $face['rect']['x']+$face['rect']['width'], $face['rect']['y']+$face['rect']['height'], $colorBg);
	$face['rect']['x2'] = round($face['rect']['x'] + $face['rect']['w']);
	$face['rect']['y2'] = round($face['rect']['y'] + $face['rect']['h']);
	$face['rect']['x'] = round($face['rect']['x']);
	$face['rect']['y'] = round($face['rect']['y']);
	imagefilledrectangle($im, $face['rect']['x'], $face['rect']['y'], $face['rect']['x2'], $face['rect']['y2'], $colorBg);
}
$im = imagescale($im, 1920, 1080); 
*/

header("Content-Type: image/jpeg");
// Save the image
imagejpeg($im, NULL, 80);
//~ imagedestroy($im);