document.addEventListener('DOMContentLoaded', function() {

    var resultEl = document.getElementById('contact_result');

    function showResult( type, message ){
        if ( !resultEl ) return;
        resultEl.classList.remove('success', 'error');
        resultEl.classList.add(type);
        resultEl.innerHTML = message;
        resultEl.style.display = '';
    }

    function setSubmitting( isSubmitting ){
        var btn = document.getElementById('contact_submit');
        if ( !btn ) return;
        if ( isSubmitting ){
            btn.style.pointerEvents = 'none';
            btn.style.opacity = '0.6';
            btn.innerHTML = '<i class="fa fa-spinner fa-spin"></i> Sender...';
        } else {
            btn.style.pointerEvents = '';
            btn.style.opacity = '';
            btn.innerHTML = 'Send forespørsel <i class="fa fa-arrow-right"></i>';
        }
    }

    function isEmail( s ){
        return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test( s );
    }

    function fieldVal( id ){
        var el = document.getElementById( id );
        return el ? ( el.value || '' ) : '';
    }

    var submitBtn = document.getElementById('contact_submit');
    if ( submitBtn ){
        submitBtn.addEventListener('click', function(){
            var form     = document.getElementById('contact_form');
            var honeypot = form ? form.querySelector('input[name="website"]') : null;

            var payload = {
                firstName: fieldVal('contact_firstname').trim(),
                lastName:  fieldVal('contact_lastname').trim(),
                email:     fieldVal('contact_email').trim(),
                phone:     fieldVal('contact_phone').trim(),
                message:   fieldVal('contact_message').trim(),
                website:   ( honeypot ? honeypot.value : '' ) || ''  // honeypot
            };

            // Klient-side validering
            if ( !payload.email || !isEmail( payload.email ) ){
                showResult('error', 'Skriv inn en gyldig e-postadresse.');
                var emailEl = document.getElementById('contact_email');
                if ( emailEl ) emailEl.focus();
                return;
            }
            if ( !payload.message ){
                showResult('error', 'Skriv en melding f&oslash;r du sender.');
                var msgEl = document.getElementById('contact_message');
                if ( msgEl ) msgEl.focus();
                return;
            }

            setSubmitting(true);
            if ( resultEl ) resultEl.style.display = 'none';

            ajaxCall( root_url + '/api/v1/contact', 'POST', JSON.stringify(payload), function( data ){
                setSubmitting(false);
                if ( data.status && data.status.code === 200 ){
                    showResult('success', 'Takk! Vi har mottatt henvendelsen din og svarer s&aring; raskt vi kan p&aring; e-post.');
                    if ( form ){
                        form.querySelectorAll('input, textarea').forEach(function( el ){ el.value = ''; });
                    }
                } else {
                    var msg = (data.status && data.status.message) || 'Kunne ikke sende henvendelsen. Pr&oslash;v igjen senere.';
                    showResult('error', msg);
                }
            });
        });
    }
});