const path = require('path');

module.exports = function (context, options) {
    const { writeKey, allowedInDev = false } = options;

    return {
        name: 'docusaurus-plugin-segment',

        getClientModules() {
            return [path.resolve(__dirname, './segment')];
        },

        injectHtmlTags() {
            if (process.env.NODE_ENV !== 'production' && !allowedInDev) {
                return {};
            }

            if (!writeKey) {
                console.warn('You need to specify a Segment writeKey in the plugin options');
                return {};
            }

            return {
                headTags: [
                    {
                        tagName: 'script',
                        innerHTML: `
            !function(){var i="analytics",analytics=window[i]=window[i]||[];if(!analytics.initialize)if(analytics.invoked)window.console&&console.error&&console.error("Segment snippet included twice.");else{analytics.invoked=!0;analytics.methods=["trackSubmit","trackClick","trackLink","trackForm","pageview","identify","reset","group","track","ready","alias","debug","page","screen","once","off","on","addSourceMiddleware","addIntegrationMiddleware","setAnonymousId","addDestinationMiddleware","register"];analytics.factory=function(e){return function(){if(window[i].initialized)return window[i][e].apply(window[i],arguments);var n=Array.prototype.slice.call(arguments);if(["track","screen","alias","group","page","identify"].indexOf(e)>-1){var c=document.querySelector("link[rel='canonical']");n.push({__t:"bpc",c:c&&c.getAttribute("href")||void 0,p:location.pathname,u:location.href,s:location.search,t:document.title,r:document.referrer})}n.unshift(e);analytics.push(n);return analytics}};for(var n=0;n<analytics.methods.length;n++){var key=analytics.methods[n];analytics[key]=analytics.factory(key)}analytics.load=function(key,n){var t=document.createElement("script");t.type="text/javascript";t.async=!0;t.setAttribute("data-global-segment-analytics-key",i);t.src="https://cdn.segment.com/analytics.js/v1/" + key + "/analytics.min.js";var r=document.getElementsByTagName("script")[0];r.parentNode.insertBefore(t,r);analytics._loadOptions=n};analytics._writeKey="${writeKey}";;analytics.SNIPPET_VERSION="5.2.0";
            analytics.load("${writeKey}", { integrations: { "Segment.io": { apiHost: "analytics.apify.com/v1" } } });
            }}();
            `,
                    },
                ],
            };
        },
    };
};
