<?php

use mystic\forum\orm\Attachment;
use mystic\forum\orm\PendingEmail;
use mystic\forum\orm\Post;
use mystic\forum\orm\Subscription;
use mystic\forum\orm\User;
use mystic\forum\utils\RequestUtils;
use Symfony\Component\Mime\Address;

/** @var string $formId */
/** @var string $topicId */
/** @var mystic\forum\orm\Topic $topic */
/** @var \mystic\forum\Database $db */
/** @var \mystic\forum\User $currentUser */

if (!$currentUser) {
    http_response_code(403);
    msg_error("You need to be logged in to add new posts!");
    exit;
}

if ($topic->isLocked) {
    http_response_code(403);
    msg_error("This topic is locked!");
    exit;
}

$attachments = reArrayFiles($_FILES["files"]);

if (count($attachments) > MAX_ATTACHMENT_COUNT)
    RequestUtils::triggerFormError(__("Too many attachments"), $formId);

// check all attachments before saving one
foreach ($attachments as $att) {
    if ($att["size"] > MAX_ATTACHMENT_SIZE) {
        RequestUtils::triggerFormError(__("Individual file size exceeded"), $formId);
    }
}

$message = trim(RequestUtils::getRequiredField("message", $formId));

if (strlen($message) < 1 || strlen($message) > 0x8000) {
    RequestUtils::triggerFormError(__("Message too short or too long!"), $formId);
}

$item = new Post();
$item->id = $db->generateId();
$item->authorId = $currentUser->id;
$item->topicId = $topicId;
$item->content = $message;
$item->postDate = new DateTimeImmutable();
$item->deleted = false;
$item->edited = false;

$db->insert($item);

foreach ($attachments as $att) {
    [
        "name" => $name,
        "type" => $type,
        "tmp_name" => $tmpName,
    ] = $att;
    $attachment = new Attachment();
    $attachment->id = $db->generateId();
    $attachment->name = $name;
    $attachment->mimeType = $type;
    $attachment->postId = $item->id;
    $attachment->contents = file_get_contents($tmpName);
    
    $db->insert($attachment);
}

if (($_POST["subscribe"] ?? null) === "on") {
    $subscription = new Subscription;
    $subscription->userId = $currentUser->id;
    $subscription->topicId = $topic->id;

    if (!$db->fetchWhere($subscription, ["user_id", "topic_id"])) {
        $subscription->id = $db->generateId();
        $db->insert($subscription);
    }
}

/** @var Subscription[] $allSubscriptions */
$allSubscriptions = $db->fetchCustom(Subscription::class, "WHERE topic_id = $1 AND user_id <> $2", [ $topicId, $currentUser->id ]);

foreach ($allSubscriptions as $subscription) {
    $subUser = new User;
    $subUser->id = $subscription->userId;
    if (!$db->fetch($subUser))
        continue;

    $email = new PendingEmail;
    $email->id = $db->generateId();
    $email->sender = env("MAILER_FROM");
    $email->recipient = (new Address($subUser->email, $subUser->displayName))->toString();
    $email->subject = __("Someone made a new post in \"%topic%\"", [
        "topic" => $topic->title,
    ]);
    $email->plaintextBody = __("Hello %name%,\n" . 
        "\n" . 
        "%otherName% has added the following post to \"%topic%\":\n" . 
        "%content%\n" . 
        "\n" . 
        "Click here to view: %link%\n", [
            "name" => $subUser->displayName,
            "otherName" => $currentUser->displayName,
            "topic" => $topic->title,
            "content" => quote_message(html_entity_decode(renderPostSummary($message))),
            "link" => env("PUBLIC_URL") . "?_action=viewtopic&topic=" . urlencode($topicId) . "#post-" . urlencode($item->id),
        ]);
    $db->insert($email);
}

header("Location: ?_action=viewtopic&topic=" . urlencode($topicId) . "#form");