<?php

require_once $_SERVER['DOCUMENT_ROOT'] . "/includes/util/functions.inc";
$app = $GLOBALS["ColdHazeApp"] = json_decode(file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/includes/app.json"), true);
$server = "account.equestria.dev";

header("Content-Type: text/plain");

if (!isset($_GET['code'])) {
    die();
}

$appdata = $GLOBALS["ColdHazeApp"];

$crl = curl_init('https://' . $server . '/hub/api/rest/oauth2/token');
curl_setopt($crl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($crl, CURLINFO_HEADER_OUT, true);
curl_setopt($crl, CURLOPT_POST, true);
curl_setopt($crl, CURLOPT_HTTPHEADER, [
    "Authorization: Basic " . base64_encode($appdata["oauth"]["id"] . ":" . $appdata["oauth"]["secret"]),
    "Content-Type: application/x-www-form-urlencoded",
    "Accept: application/json"
]);
curl_setopt($crl, CURLOPT_POSTFIELDS, "grant_type=authorization_code&redirect_uri=" . urlencode("https://ponies.equestria.horse/auth/callback") . "&code=" . $_GET['code']);

$result = curl_exec($crl);
$result = json_decode($result, true);

curl_close($crl);

if (isset($result["access_token"])) {
    $crl = curl_init('https://' . $server . '/hub/api/rest/users/me');
    curl_setopt($crl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($crl, CURLINFO_HEADER_OUT, true);
    curl_setopt($crl, CURLOPT_HTTPHEADER, [
        "Authorization: Bearer " . $result["access_token"],
        "Accept: application/json"
    ]);

    $result = $result_orig = curl_exec($crl);
    $result = json_decode($result, true);

    if (!in_array($result["id"], $appdata["oauth"]["allowed"]["admin"]) && !in_array($result["id"], $appdata["oauth"]["allowed"]["lower"])) {
        peh_error("Access denied, you are not allowed to login to this website", 403);
        die();
    }

    if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/includes/sessions")) mkdir($_SERVER['DOCUMENT_ROOT'] . "/includes/sessions");
    if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/includes/tokens")) mkdir($_SERVER['DOCUMENT_ROOT'] . "/includes/tokens");
    if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/includes/lowertokens")) mkdir($_SERVER['DOCUMENT_ROOT'] . "/includes/lowertokens");

    $token = generateToken();

    if (in_array($result["id"], $appdata["oauth"]["allowed"]["admin"])) {
        file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/includes/sessions/" . $token, json_encode([
            "created" => time(),
            "last" => time(),
            "profile" => $result,
            "addresses" => [],
            "name" => "Cold Haze Web (" . get_browser(null, true)["browser"] . " on " . str_replace("Windows dows", "Windows", str_replace("Win", "Windows ", str_replace("MacOSX", "macOS", get_browser(null, true)["platform"]))) . ")"
        ]));

        file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/includes/tokens/" . $token, $result_orig);
    } else {
        file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/includes/session/" . $token, json_encode([
            "created" => time(),
            "last" => time(),
            "profile" => $result,
            "addresses" => [],
            "name" => "Cold Haze Web (" . get_browser(null, true)["browser"] . " on " . get_browser(null, true)["platform"] . ")"
        ]));

        file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/includes/lowertokens/" . $token, $result_orig);
    }

    header("Set-Cookie: PEH2_SESSION_TOKEN=" . $token . "; SameSite=None; Path=/; Secure; HttpOnly; Expires=" . date("r", time() + (86400 * 730)));

    if (isset($_COOKIE["PEH2_RETURN_PAGE"])) {
        header("Location: " . str_replace("\n", "", str_replace("\r", "", $_COOKIE["PEH2_RETURN_PAGE"])));
    } else {
        header("Location: /");
    }

    setcookie("PEH2_RETURN_PAGE", "");
    die();
}