import _ from 'lodash';
import { strings } from '@strapi/utils';
import { isIP } from 'node:net';

const getConfigUrls = (config, forAdminBuild = false)=>{
    const serverConfig = config.server;
    const adminConfig = config.admin;
    // Defines serverUrl value
    let serverUrl = _.get(serverConfig, 'url', '');
    serverUrl = _.trim(serverUrl, '/ ');
    if (typeof serverUrl !== 'string') {
        throw new Error('Invalid server url config. Make sure the url is a string.');
    }
    if (serverUrl.startsWith('http')) {
        try {
            serverUrl = _.trim(new URL(serverConfig.url).toString(), '/');
        } catch (e) {
            throw new Error('Invalid server url config. Make sure the url defined in server.js is valid.');
        }
    } else if (serverUrl !== '') {
        serverUrl = `/${serverUrl}`;
    }
    // Defines adminUrl value
    let adminUrl = _.get(adminConfig, 'url', '/admin');
    adminUrl = _.trim(adminUrl, '/ ');
    if (typeof adminUrl !== 'string') {
        throw new Error('Invalid admin url config. Make sure the url is a non-empty string.');
    }
    if (adminUrl.startsWith('http')) {
        try {
            adminUrl = _.trim(new URL(adminUrl).toString(), '/');
        } catch (e) {
            throw new Error('Invalid admin url config. Make sure the url defined in server.js is valid.');
        }
    } else {
        adminUrl = `${serverUrl}/${adminUrl}`;
    }
    // Defines adminPath value
    let adminPath = adminUrl;
    if (serverUrl.startsWith('http') && adminUrl.startsWith('http') && new URL(adminUrl).origin === new URL(serverUrl).origin && !forAdminBuild) {
        adminPath = adminUrl.replace(strings.getCommonPath(serverUrl, adminUrl), '');
        adminPath = `/${_.trim(adminPath, '/')}`;
    } else if (adminUrl.startsWith('http')) {
        adminPath = new URL(adminUrl).pathname;
    }
    return {
        serverUrl,
        adminUrl,
        adminPath
    };
};
const getAbsoluteUrl = (adminOrServer)=>(config, forAdminBuild = false)=>{
        const { serverUrl, adminUrl } = getConfigUrls(config, forAdminBuild);
        const url = adminOrServer === 'server' ? serverUrl : adminUrl;
        if (url.startsWith('http')) {
            return url;
        }
        const serverConfig = config.server;
        const isLocalhost = config.environment === 'development' && [
            '127.0.0.1',
            '0.0.0.0',
            '::1',
            '::'
        ].includes(serverConfig.host);
        if (isLocalhost) {
            return `http://localhost:${serverConfig.port}${url}`;
        }
        if (isIP(serverConfig.host) === 6) {
            return `http://[${serverConfig.host}]:${serverConfig.port}${url}`;
        }
        return `http://${serverConfig.host}:${serverConfig.port}${url}`;
    };
const getAbsoluteAdminUrl = getAbsoluteUrl('admin');
const getAbsoluteServerUrl = getAbsoluteUrl('server');

export { getAbsoluteAdminUrl, getAbsoluteServerUrl, getConfigUrls };
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