<?php
use Misuzu\Application;
use Misuzu\Database;
use Misuzu\IO\File;

define('MSZ_USER_PERM_EDIT_PROFILE', 1);
define('MSZ_USER_PERM_CHANGE_AVATAR', 1 << 1);

define('MSZ_USER_PERM_MANAGE_USERS', 1 << 20);
define('MSZ_USER_PERM_MANAGE_ROLES', 1 << 21);
define('MSZ_USER_PERM_MANAGE_PERMS', 1 << 22);
define('MSZ_USER_PERM_MANAGE_REPORTS', 1 << 23);
define('MSZ_USER_PERM_MANAGE_RESTRICTIONS', 1 << 24);
define('MSZ_USER_PERM_MANAGE_BLACKLISTS', 1 << 25);

define('MSZ_USERS_PASSWORD_HASH_ALGO', PASSWORD_ARGON2I);

function user_create(
    string $username,
    string $password,
    string $email,
    string $ipAddress
): int {
    $dbc = Database::connection();
    $createUser = $dbc->prepare('
        INSERT INTO `msz_users`
            (
                `username`, `password`, `email`, `register_ip`,
                `last_ip`, `user_country`, `created_at`, `display_role`
            )
        VALUES
            (
                :username, :password, LOWER(:email), INET6_ATON(:register_ip),
                INET6_ATON(:last_ip), :user_country, NOW(), 1
            )
    ');
    $createUser->bindValue('username', $username);
    $createUser->bindValue('password', user_password_hash($password));
    $createUser->bindValue('email', $email);
    $createUser->bindValue('register_ip', $ipAddress);
    $createUser->bindValue('last_ip', $ipAddress);
    $createUser->bindValue('user_country', get_country_code($ipAddress));

    return $createUser->execute() ? (int)$dbc->lastInsertId() : 0;
}

function user_password_hash(string $password): string
{
    return password_hash($password, MSZ_USERS_PASSWORD_HASH_ALGO);
}

// Temporary key generation for chat login.
// Should eventually be replaced with a callback login system.
function user_generate_chat_key(int $userId): string
{
    $chatKey = bin2hex(random_bytes(16));

    $setChatKey = Database::connection()->prepare('
        UPDATE `msz_users`
        SET `user_chat_key` = :user_chat_key
        WHERE `user_id` = :user_id
    ');
    $setChatKey->bindValue('user_chat_key', $chatKey);
    $setChatKey->bindValue('user_id', $userId);

    return $setChatKey->execute() ? $chatKey : '';
}

define('MSZ_USER_AVATAR_FORMAT', '%d.msz');

function user_avatar_delete(int $userId): void
{
    $app = Application::getInstance();
    $avatarFileName = sprintf(MSZ_USER_AVATAR_FORMAT, $userId);

    $deleteThis = [
        $app->getStore('avatars/original')->filename($avatarFileName),
        $app->getStore('avatars/200x200')->filename($avatarFileName),
    ];

    foreach ($deleteThis as $deleteAvatar) {
        if (File::exists($deleteAvatar)) {
            File::delete($deleteAvatar);
        }
    }
}

define('MSZ_USER_AVATAR_TYPE_PNG', IMAGETYPE_PNG);
define('MSZ_USER_AVATAR_TYPE_JPG', IMAGETYPE_JPEG);
define('MSZ_USER_AVATAR_TYPE_GIF', IMAGETYPE_GIF);
define('MSZ_USER_AVATAR_TYPES', [
    MSZ_USER_AVATAR_TYPE_PNG,
    MSZ_USER_AVATAR_TYPE_JPG,
    MSZ_USER_AVATAR_TYPE_GIF,
]);

function user_avatar_is_allowed_type(int $type): bool
{
    return in_array($type, MSZ_USER_AVATAR_TYPES, true);
}

define('MSZ_USER_AVATAR_OPTIONS', [
    'max_width' => 4000,
    'max_height' => 4000,
    'max_size' => 1000000,
]);

define('MSZ_USER_AVATAR_NO_ERRORS', 0);
define('MSZ_USER_AVATAR_ERROR_INVALID_IMAGE', 1);
define('MSZ_USER_AVATAR_ERROR_PROHIBITED_TYPE', 2);
define('MSZ_USER_AVATAR_ERROR_DIMENSIONS_TOO_LARGE', 3);
define('MSZ_USER_AVATAR_ERROR_DATA_TOO_LARGE', 4);
define('MSZ_USER_AVATAR_ERROR_TMP_FAILED', 5);
define('MSZ_USER_AVATAR_ERROR_STORE_FAILED', 6);
define('MSZ_USER_AVATAR_ERROR_FILE_NOT_FOUND', 7);

function user_avatar_set_from_path(int $userId, string $path, array $options = []): int
{
    if (!file_exists($path)) {
        return MSZ_USER_AVATAR_ERROR_FILE_NOT_FOUND;
    }

    $options = array_merge(MSZ_USER_AVATAR_OPTIONS, $options);

    // 0 => width, 1 => height, 2 => type
    $imageInfo = getimagesize($path);

    if ($imageInfo === false
        || count($imageInfo) < 3
        || $imageInfo[0] < 1
        || $imageInfo[1] < 1) {
        return MSZ_USER_AVATAR_ERROR_INVALID_IMAGE;
    }

    if (!user_avatar_is_allowed_type($imageInfo[2])) {
        return MSZ_USER_AVATAR_ERROR_PROHIBITED_TYPE;
    }

    if ($imageInfo[0] > $options['max_width']
        || $imageInfo[1] > $options['max_height']) {
        return MSZ_USER_AVATAR_ERROR_DIMENSIONS_TOO_LARGE;
    }

    if (filesize($path) > $options['max_size']) {
        return MSZ_USER_AVATAR_ERROR_DATA_TOO_LARGE;
    }

    user_avatar_delete($userId);

    $fileName = sprintf(MSZ_USER_AVATAR_FORMAT, $userId);
    $avatarPath = Application::getInstance()->getStore('avatars/original')->filename($fileName);

    if (!copy($path, $avatarPath)) {
        return MSZ_USER_AVATAR_ERROR_STORE_FAILED;
    }

    return MSZ_USER_AVATAR_NO_ERRORS;
}

function user_avatar_set_from_data(int $userId, string $data, array $options = []): int
{
    $tmp = tempnam(sys_get_temp_dir(), 'msz');

    if ($tmp === false || !file_exists($tmp)) {
        return MSZ_USER_AVATAR_ERROR_TMP_FAILED;
    }

    chmod($tmp, 644);
    file_put_contents($tmp, $data);
    $result = user_avatar_set_from_path($userId, $tmp, $options);
    unlink($tmp);

    return $result;
}