#!/usr/bin/php

<?php

/* Old Nvidia drivers do not have a JSON with supported models,
 * but JSONs of newer drivers specify GPUs supported by older drivers.
 * This scripts takes a JSON from a newer driver and converts it
 * into a JSON for an older driver which does not ship a native JSON. */

define("EXIT_CODE_EINPUT", 10);
define("EXIT_CODE_PARSEERROR", 20);

$FILE = getenv("FILE");
if (empty($FILE)) {
	fwrite(STDERR, "Env FILE is not set! Set FILE=supported-gpus.json" . PHP_EOL);
	exit(EXIT_CODE_EINPUT);
}

$BRANCH = getenv("BRANCH");
if (empty($BRANCH)) {
	fwrite(STDERR, "Env BRANCH is not set! Set e.g. ENV=390 to generate JSON for branch 390.xx" . PHP_EOL);
	exit(EXIT_CODE_EINPUT);
}	

$data = file_get_contents($FILE);
$array = json_decode($data);

if (empty($array)) {
	fwrite(STDERR, "Error decoding JSON from file " . $FILE . " !" . PHP_EOL);
	exit(EXIT_CODE_EINPUT);
}

$chips_arr = array();

foreach($array->chips as $chip) {
	if (empty($chip->legacybranch))
		continue;
	// php 8+ has str_starts_with()
	if (!(strpos($chip->legacybranch, $BRANCH . ".", 0) === 0))
		continue;
	// devid (Device ID) cannot be empty, other params can be empty
	if (empty($chip->devid)) {
		fwrite(STDERR, "Device ID cannot be empty!" . PHP_EOL);
		exit(EXIT_CODE_PARSEERROR);
	}
	$arr = array("devid" => $chip->devid,
				 "subdevid" => $chip->subdevid,
				 "subvendorid" => $chip->subvendorid,
				 "name" => $chip->name,
				 "features" => $chip->features);
	array_push($chips_arr, $arr);
}

$chips_arr = array("chips" => $chips_arr);
echo json_encode($chips_arr);

?>