<?php

/**
 * Horospire's own engine at the study's moments.
 *
 * Horospire ephemeris accuracy study, version 1.0. MIT licence (LICENSE-CODE.txt).
 *
 * Usage: php house_engine.php PATH_TO_HOROSPIRE MOMENTS_JSON OUT_JSON
 *
 * This harness needs Horospire's source, which version 1.0 does not publish:
 * App\Services\Pro\EphemerisEngine at commit dfb56ab71, called through
 * Composer's autoloader with no framework boot. It is published so a reader
 * can see exactly how the engine was asked: getPlanetLongitude() with the
 * civil time as given, for each of the ten bodies. The engine reads that time
 * as its dynamical time (it applies no Delta T), and its error therefore
 * includes Delta T, as an application's would.
 */
[$self, $root, $in, $out] = $argv;
require $root.'/vendor/autoload.php';

use App\Services\Pro\EphemerisEngine;
use Carbon\Carbon;

$bodies = ['sun', 'moon', 'mercury', 'venus', 'mars', 'jupiter', 'saturn', 'uranus', 'neptune', 'pluto'];
$engine = new EphemerisEngine;
$rows = [];
foreach (json_decode((string) file_get_contents($in), true, flags: JSON_THROW_ON_ERROR) as $civil) {
    $when = Carbon::parse($civil);
    $rows[] = array_map(fn (string $body): float => (float) $engine->getPlanetLongitude($when, $body)['longitude'], $bodies);
}
file_put_contents($out, json_encode(['engine' => 'Horospire EphemerisEngine', 'lon' => $rows]));
fwrite(STDOUT, count($rows)." moments\n");