<?php

require 'vendor/autoload.php';

const NUM_OF_COMMENTS = 200;
const NUM_OF_POSTS = 100;
const NUM_OF_TAGS_CANDIDATE = 30;
const NUM_OF_USERS = 10;
const USER_PASSWORD = '1234';

$config = (new Core\Config)->get('database');
$db = new Core\Database\QueryBuilder(
    new PDO(
        "{$config['connection']};charset=utf8",
        $config['username'],
        $config['password'],
        $config['options']
    )
);
$schema = file_get_contents('schema.sql');
$sql = $db->prepare($schema);
$sql->execute();

$faker = Faker\Factory::create();

$rows = [];
$holders = [];
$usernames = [];

for ($i = 0; $i < NUM_OF_USERS; $i += 1) {
    array_push($usernames, $faker->unique()->userName);
}

for ($i = 0; $i < NUM_OF_USERS; $i += 1) {
    array_push(
        $rows,
        $usernames[$i],
        $faker->unique()->freeEmail,
        password_hash(USER_PASSWORD, PASSWORD_DEFAULT)
    );
    array_push($holders, '(NULL,?,?,?)');
}

$sql = $db->prepare('INSERT INTO users VALUES ' . implode(', ', $holders));
$sql->execute($rows);

$rows = [];
$holders = [];
$datetimes = [];
$from = NUM_OF_POSTS + 3;

for ($i = 0; $i < NUM_OF_POSTS; $i += 1) {
    array_push(
        $datetimes,
        $faker->unique()
              ->dateTimeBetween("-{$from} days", '-3 days')
              ->format('Y-m-d H:i:s')
    );
}

sort($datetimes);

$mh = curl_multi_init();
for ($i = 0; $i < NUM_OF_POSTS; $i += 1) {
    $fetchURL = 'https://jaspervdj.be/lorem-markdownum/markdown.txt';
    $multiCurl[$i] = curl_init();
    curl_setopt($multiCurl[$i], CURLOPT_URL, $fetchURL);
    curl_setopt($multiCurl[$i], CURLOPT_HEADER, 0);
    curl_setopt($multiCurl[$i], CURLOPT_RETURNTRANSFER, 1);
    curl_multi_add_handle($mh, $multiCurl[$i]);
}

$index = null;
do {
    curl_multi_exec($mh, $index);
} while ($index > 0);

for ($i = 0; $i < NUM_OF_POSTS; $i += 1) {
    $r = $faker->numberBetween(0, 9);
    array_push(
        $rows,
        implode(' ', array_slice(explode(' ', $faker->unique()->realText()), 0, 6)),
        curl_multi_getcontent($multiCurl[$i]),
        $usernames[$r],
        $datetimes[$i],
        $datetimes[$i]
    );
    array_push($holders, '(NULL,?,?,?,?,?)');
    curl_multi_remove_handle($mh, $multiCurl[$i]);
}
curl_multi_close($mh);

$sql = $db->prepare('INSERT INTO posts VALUES ' . implode(', ', $holders));
$sql->execute($rows);

$rows = [];
$holders = [];
$cdatetimes = [];
$cposts = [];

for ($i = 0; $i < NUM_OF_COMMENTS; $i += 1) {
    $p = $faker->numberBetween(0, NUM_OF_POSTS - 1);
    $d = $faker->numberBetween(0, 1);
    $h = $faker->numberBetween(0, 23);
    $m = $faker->numberBetween(0, 59);
    $s = $faker->numberBetween(0, 59);
    array_push(
        $cdatetimes,
        date_create_from_format('Y-m-d H:i:s', $datetimes[$p])
            ->add(new DateInterval("P{$d}DT{$h}H{$m}M{$s}S"))
            ->format('Y-m-d H:i:s')
    );
    array_push($cposts, $p + 1);
}

array_multisort($cdatetimes, $cposts);

for ($i = 0; $i < NUM_OF_COMMENTS; $i += 1) {
    $r = $faker->numberBetween(0, NUM_OF_USERS - 1);
    array_push(
        $rows,
        $faker->unique()->realText(100, 1),
        $usernames[$r],
        $cdatetimes[$i],
        $cdatetimes[$i],
        $cposts[$i]
    );
    array_push($holders, '(NULL,?,?,?,?,?)');
}

$sql = $db->prepare('INSERT INTO comments VALUES ' . implode(', ', $holders));
$sql->execute($rows);

$rows = [];
$holders = [];
$tags = array_values(array_unique($faker->words(NUM_OF_TAGS_CANDIDATE)));
$num_of_tags = count($tags);

for ($i = 0; $i < $num_of_tags; $i += 1) {
    array_push($rows, null, $tags[$i]);
    array_push($holders, '(?,?)');
}

$sql = $db->prepare('INSERT INTO tags VALUES ' . implode(', ', $holders));
$sql->execute($rows);

$rows = [];
$holders = [];
$links = [];

for ($i = 0; $i < 4 * NUM_OF_POSTS; $i += 1) {
    $p = $faker->numberBetween(1, NUM_OF_POSTS);
    $t = $faker->numberBetween(1, $num_of_tags);
    array_push($links, [$p, $t]);
}

$rows = array_values(array_unique($links, SORT_REGULAR));

sort($rows);

for ($i = 0; $i < count($rows); $i += 1) {
    array_push($holders, '(?,?)');
}

$sql = $db->prepare('INSERT INTO post_tag VALUES ' . implode(', ', $holders));
$sql->execute(call_user_func_array('array_merge', $rows));

echo "Done!\n";