var installPromptEvnt = null;

window.onload = () => {
    if ('serviceWorker' in navigator) {
        navigator.serviceWorker.register('/empty_sw.js')
            .then((reg) => console.log('SW registered:', reg.scope))
            .catch((err) => console.error('SW registration failed:', err));
    }

    window.addEventListener("beforeinstallprompt", (e) => {
        installPromptEvnt = e;
        document.getElementById("inp_bttn").disabled = false;
    });

    document.getElementById("inp_bttn").addEventListener("click", function(){
        installPromptEvnt.prompt();
        this.disabled = true;
    });

    var fetch_filmInfo = async (in_url)=>{
        // pretty good test redirect: https://share.google/mSDJehdZm6hp6vTYy
        var resp;


        //resp = await fetch("https://www.imdb.com/title/tt0245429/?ref_=nv_sr_srsg_0_tt_8_nm_0_in_0_q_spirited");
        //resp = await fetch("https://www.filmweb.pl/film/Spirited+Away%3A+W+krainie+Bog%C3%B3w-2001-33288");
        resp = await fetch(in_url);
        //console.log("Redirected:", response.redirected);
        console.log("Redirected URL:", resp.url);
        noRed_URL = resp.url;


        var api_URL = null;
        noRed_URL = new URL(noRed_URL);
        const db_host = noRed_URL.hostname;
        noRed_URL.search = '';

        switch(db_host){
            case "www.filmweb.pl":
                api_URL = `https://www.filmweb.pl/api/v1/film/${noRed_URL.href.slice(noRed_URL.href.lastIndexOf("-")+1)}/preview`;
                break;

            case "www.imdb.com":
                // https://imdbapi.dev/
                noRed_URL.hostname = "api.imdbapi.dev";
                api_URL = noRed_URL.href.replace("/title/", "/titles/").slice(0, -1);
                break;
        }
        console.log("API URL:", api_URL);


        var resp = await fetch(api_URL)
        var data = await resp.json();
        console.log("Ext info:", data);


        var film_info = null;

        switch(db_host){
            case "www.filmweb.pl":
                film_info = {};
                film_info["title_en"] = data["internationalTitle"] ? data["internationalTitle"]["title"] : data["originalTitle"]["title"];
                film_info["title_pl"] = data["title"]["title"];
                film_info["desc"] = data["plotOrDescriptionSynopsis"];
                film_info["year"] = data["year"];
                //film_info["img"] = data["coverPhoto"]["photo"]["sourcePath"];
                film_info["img"] = "https://fwcdn.pl/fpo"+data["poster"]["path"];
                //directors
                //countries
                //poster
                break;

            case "www.imdb.com":
                film_info = {};
                film_info["title_en"] = data["primaryTitle"];
                film_info["title_pl"] = null;
                film_info["desc"] = data["plot"];
                film_info["year"] = data["startYear"];
                film_info["img"] = data["primaryImage"]["url"];
                break;
        }
        console.log("Film info:", film_info);


        document.getElementById("filmInfo_title").innerHTML = film_info["title_pl"] ? film_info["title_pl"] : film_info["title_en"];
        document.getElementById("filmInfo_year").innerHTML = film_info["year"];
        document.getElementById("filmInfo_desc").innerHTML = film_info["desc"];
        document.getElementById("filmInfo_img").src = film_info["img"];
    };

    document.getElementById("inEl").addEventListener("input", function(){
        fetch_filmInfo(this.value);
    });
};