#!/usr/bin/env php
<?php declare(strict_types=1);
$repositories = [
    'bebbo/amiga-gcc' => 'master',
    'bebbo/amiga-netinclude' => 'master',
    'bebbo/binutils-gdb' => 'amiga',
    'bebbo/clib2' => 'master',
    'bebbo/fd2pragma' => 'master',
    'cahirwpz/fd2sfd' => 'master',
    'bebbo/gcc' => 'gcc-6-branch',
    'bebbo/ira' => 'master',
    'bebbo/ixemul' => 'master',
    'jca02266/lha' => 'master',
    'bebbo/libdebug' => 'master',
    'bebbo/libnix' => 'master',
    'AmigaPorts/libSDL12' => 'master',
    'bebbo/newlib-cygwin' => 'amiga',
    'adtools/sfdc' => 'master',
    'leffmann/vasm' => 'master',
    'bebbo/vbcc' => 'master',
    'leffmann/vlink' => 'master',
    'bebbo/aros-stuff' => 'master',
];

foreach ($repositories as $repository => $branch) {
    printf(
        'Checking %-26s ',
        $repository . ' ...'
    );

    $file    = __DIR__ . '/.revisions/' . $repository;
    $old     = trim(file_get_contents($file));
    $commits = fetch_commits($repository, $branch);
    $new     = $commits['0']['sha'];

    if ($old === $new) {
        print 'not updated' . PHP_EOL;

        continue;
    }

    file_put_contents($file, $new);

    $numberOfCommitsSinceOld = 0;
    $updatedPrinted          = false;

    foreach ($commits as $commit) {
        $numberOfCommitsSinceOld++;

        if ($old === $commit['sha']) {
            printf(
                'updated (%d new commits)%s',
                $numberOfCommitsSinceOld,
                PHP_EOL
            );

            $updatedPrinted = true;

            break;
        }
    }

    if (!$updatedPrinted) {
        print 'updated' . PHP_EOL;
    }
}

function fetch_commits(string $repository, string $branch): array
{
    $options = [
        'http' => [
            'user_agent' => 'PHP ' . PHP_VERSION
        ]
    ];

    $context = stream_context_create($options);

    return json_decode(
        file_get_contents(
            sprintf(
                'https://api.github.com/repos/%s/commits?sha=%s',
                $repository,
                $branch
            ),
            false,
            $context
        ),
        true
    );
}