#!/usr/bin/env php
<?php
/*
 * lilybin v0.2
 * Copyright (c)2017
 * contributors:
 * Sven Axelsson <address@hidden>
 * Martin Tarenskeen <address@hidden>
*/

function do_curl($url, $opts)
{
    $curl = curl_init($url);
    curl_setopt_array($curl, $opts);
    $result = curl_exec($curl);
    curl_close($curl);

    return $result;
}

$VERSION = "lilybin v0.2 (2017-03-27)" . PHP_EOL;
$opts = getopt('dhuv', $argv);
$sep = array_search('--', $argv);
$files = array_slice($argv, $sep ? ++$sep : count($opts) + 1);
$download = isset($opts['d']);
$unstable = isset($opts['u']);
$help = "Usage:" . PHP_EOL .
    "\tlilybin [-u] INFILE.ly OUTFILE.pdf" . PHP_EOL .
    "\tlilybin [-u] INFILE.ly OUTFILE.mid" . PHP_EOL .
    "\t\t=> Download and directly save result" . PHP_EOL .
    "\tlilybin [-u] INFILE.ly" . PHP_EOL .
    "\t\t=> Only print ID for download" . PHP_EOL .
    "\tlilybin -d (ID.pdf|ID.midi)" . PHP_EOL .
    "\t\t=> Download result from remote server" . PHP_EOL .
    "Other options:" . PHP_EOL .
    "\t-h print this Help message" . PHP_EOL .
    "\t-u use Unstable lilypond-devel version" . PHP_EOL;

if (count($files) === 0 || count($files) > 2) {
    echo $VERSION;
    die($help);
}

if (count($files) == 2) {
    $all = True;
    $ext = "." . pathinfo($files[1])['extension'];
    if ($ext == ".mid") {
        $ext = ".midi";
    }
} else {
    $all = False;
}

if ($unstable) {
    $stable = 'unstable';
} else {
    $stable = 'stable';
}

if ($all || !$download) {
    $url = 'https://7icpm9qr6a.execute-api.us-west-2.amazonaws.com/prod/prepare_preview/' . $stable;
    $result = json_decode(do_curl($url, [
        CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
        CURLOPT_POST => 1,
        CURLOPT_POSTFIELDS => json_encode(['code' =>
file_get_contents($files[0])]),
        CURLOPT_RETURNTRANSFER => true,
    ]));
    if (!$result->id) {
        echo "ERROR:", PHP_EOL, $result->stderr;
        exit(1);
    }
    if ($all) {
        $files[0] = $result->id . $ext;
    } else {
        echo $argv[0], ' -d ', $result->id, ".(pdf|midi)", PHP_EOL;
        exit;
    }
}

if ($all || $download) {
    $url = 'https://s3-us-west-2.amazonaws.com/lilybin-scores/' . $files[0];
    $file = fopen(@$files[1] ?: $files[0], 'w');
    do_curl($url, [CURLOPT_FILE => $file]);
    fclose($file);
}