document.addEventListener("DOMContentLoaded", () => {
    const el = document.getElementById("hv-schema");
    if (!el) return;
    wp.apiFetch({ path: "/hv/v1/schema" }).then((raw) => {
        const events = parseICS(raw.ics).slice(0, raw.antal);
        el.innerHTML = events
            .map(
                (ev) => `
     <div class='hv-item'>
       <div class='hv-kurs'>${ev.kurs}</div>
       <div class='hv-moment'>${ev.moment}</div>
       <div class='hv-datum'>${ev.datum}</div>
       <div class='hv-tid'>${ev.tid}</div>
       <div class='hv-lokal'>${ev.lokal}</div>
     </div>`,
            )
            .join("");
    });
});
function parseICS(data) {
    const lines = data.split(/\r?\n/);
    let ev = [],
        cur = null;

    for (const l of lines) {
        if (l.startsWith("BEGIN:VEVENT")) cur = {};

        if (l.startsWith("SUMMARY:")) {
            const raw = l.replace("SUMMARY:", "").trim();

            //
            // ======== KURS =========
            //
            let kurs = "";
            let kursMatch = raw.match(/Kurs\.grp:\s*([^:]+?)(?:\s+Sign:|$)/);

            if (kursMatch) {
                kurs = kursMatch[1].trim();
            }

            // ✅ Ta bort dubletter: "A A" → "A"
            kurs = kurs.replace(/^(.*)\s+\1$/, "$1").trim();

            cur.kurs = kurs;

            //
            // ======== MOMENT =========
            //
            let moment = "";
            let momentMatch = raw.match(/Moment:\s*(.+?)(?:\s+Aktivitetstyp:|$)/);

            if (momentMatch) {
                moment = momentMatch[1].trim();
            } else {
                // fallback
                const parts = raw.split(" - ");
                if (parts[1]) {
                    moment = parts[1].trim();
                }
            }

            // Rensa "Moment:" om det ligger kvar
            moment = moment.replace(/^Moment:\s*/i, "").trim();

            cur.moment = moment;
        }

        //
        // ======== DATUM & TID =========
        //
        if (l.startsWith("DTSTART:")) {
            const dt = l.replace("DTSTART:", "");
            cur.datum = dt.substring(0, 4) + "-" + dt.substring(4, 6) + "-" + dt.substring(6, 8);
            cur.tid = dt.substring(9, 11) + ":" + dt.substring(11, 13);
        }

        //
        // ======== LOKAL =========
        //
        if (l.startsWith("LOCATION:")) cur.lokal = l.replace("LOCATION:", "").trim();

        if (l.startsWith("END:VEVENT")) ev.push(cur);
    }

    return ev;
}
function parseICS(data) {
    const lines = data.split(/\r?\n/);
    let ev = [],
        cur = null;

    for (const l of lines) {
        if (l.startsWith("BEGIN:VEVENT")) cur = {};

        if (l.startsWith("SUMMARY:")) {
            const raw = l.replace("SUMMARY:", "").trim();

            //
            // ======== KURS =========
            //
            let kurs = "";
            let kursMatch = raw.match(/Kurs\.grp:\s*([^:]+?)(?:\s+Sign:|$)/);

            if (kursMatch) kurs = kursMatch[1].trim();
            kurs = kurs.replace(/^(.*)\s+\1$/, "$1").trim(); // ta bort dubletter
            cur.kurs = kurs;

            //
            // ======== MOMENT =========
            //
            let moment = "";
            let momentMatch = raw.match(/Moment:\s*(.+?)(?:\s+Aktivitetstyp:|$)/);

            if (momentMatch) {
                moment = momentMatch[1].trim();
            } else {
                const parts = raw.split(" - ");
                if (parts[1]) moment = parts[1].trim();
            }

            moment = moment.replace(/^Moment:\s*/i, "").trim();
            cur.moment = moment;
        }

        //
        // ======== DATUM & TID (MED SVERIGE-TID) ========
        //
        if (l.startsWith("DTSTART:")) {
            const dt = l.replace("DTSTART:", "");

            // Plocka ut delar ur ICS-datumet
            const year = Number(dt.substring(0, 4));
            const month = Number(dt.substring(4, 6));
            const day = Number(dt.substring(6, 8));
            const hour = Number(dt.substring(9, 11));
            const min = Number(dt.substring(11, 13));

            // Skapa en UTC-tid från ICS
            const dateUTC = new Date(Date.UTC(year, month - 1, day, hour, min));

            // Konvertera till svensk tid
            const dateLocal = new Date(
                dateUTC.toLocaleString("sv-SE", { timeZone: "Europe/Stockholm" }),
            );

            // Formatera svensk datumtext, t.ex. "2 april 2026"
            const formattedDate = new Intl.DateTimeFormat("sv-SE", {
                day: "numeric",
                month: "long",
                year: "numeric",
            }).format(dateLocal);

            // Formatera tiden, t.ex. "13:15"
            const hh = String(dateLocal.getHours()).padStart(2, "0");
            const mi = String(dateLocal.getMinutes()).padStart(2, "0");

            cur.datum = formattedDate;
            cur.tid = `${hh}:${mi}`;
        }
        //
        // ======== LOKAL =========
        //
        if (l.startsWith("LOCATION:")) cur.lokal = l.replace("LOCATION:", "").trim();

        if (l.startsWith("END:VEVENT")) ev.push(cur);
    }

    return ev;
}