'use strict';

// ── Lieferanten-Autospeicherung ─────────────────────────────────
document.addEventListener('DOMContentLoaded', function() {
    const _sup = document.getElementById('supplier-persistent-input');
    if (!_sup) return;
    const _bar = _sup.closest('[data-beleg-id]');
    async function _saveSupplier() {
        const newValue = _sup.value.trim();
        if (!_bar) return;
        const body = new URLSearchParams({
            rechnungs_nr:  _bar.dataset.rechnungsNr  || '',
            belegtyp:      _bar.dataset.belegtyp     || '',
            beleg_datum:   _bar.dataset.belegDatum   || '',
            betrag_brutto: _bar.dataset.betragBrutto || '',
            supplier_name: newValue,
        });
        try {
            const res = await fetch('/belege/' + _bar.dataset.belegId + '/meta', {
                method: 'POST',
                headers: {'X-Requested-With': 'XMLHttpRequest', 'Content-Type': 'application/x-www-form-urlencoded'},
                body: body.toString(),
            });
            if (!res.ok) throw new Error();
            if (newValue) {
                _bar.dataset.supplierName = newValue;
                // Hidden-Metaformular synchron halten
                const hiddenInput = document.getElementById('supplier_name_input');
                if (hiddenInput) hiddenInput.value = newValue;
                // Persistentes Input durch Inline-Trigger ersetzen (= visuelle Bestätigung)
                const span = document.createElement('span');
                span.className   = 'inline-edit-trigger';
                span.id          = 'supplier-inline-trigger';
                span.dataset.field = 'supplier_name';
                span.dataset.type  = 'text';
                span.dataset.raw   = newValue;
                span.title       = 'Klicken zum Bearbeiten';
                span.textContent = newValue;
                _sup.replaceWith(span);
            }
        } catch (_) {
            // Speichern fehlgeschlagen – Feld bleibt editierbar
        }
    }
    _sup.addEventListener('blur', _saveSupplier);
    _sup.addEventListener('keydown', function(e) {
        if (e.key === 'Enter') { e.preventDefault(); _sup.blur(); }
    });
});

// ── Verschiebbarer Trenner (Split-Pane) ──────────────────────────
(function () {
    const STORAGE_KEY = 'beleg_split_width';
    const layout  = document.getElementById('beleg-split-layout');
    const preview = document.getElementById('beleg-preview-pane');
    const handle  = document.getElementById('beleg-split-handle');
    if (!layout || !preview || !handle) return;

    function applyWidth(px) {
        preview.style.width = px + 'px';
        preview.style.setProperty('--beleg-preview-width', px + 'px');
    }

    function savedWidth() {
        const stored = parseInt(localStorage.getItem(STORAGE_KEY), 10);
        if (!isNaN(stored) && stored > 0) return stored;
        return Math.round(layout.offsetWidth * 0.55);
    }

    applyWidth(savedWidth());

    let dragging = false;
    let startX   = 0;
    let startW   = 0;

    handle.addEventListener('mousedown', function (e) {
        e.preventDefault();
        dragging = true;
        startX   = e.clientX;
        startW   = preview.offsetWidth;
        handle.classList.add('dragging');
        document.body.style.cursor      = 'col-resize';
        document.body.style.userSelect  = 'none';
    });

    document.addEventListener('mousemove', function (e) {
        if (!dragging) return;
        const delta  = e.clientX - startX;
        const total  = layout.offsetWidth;
        const minR   = 320;
        const maxW   = total - minR - handle.offsetWidth;
        const newW   = Math.max(200, Math.min(maxW, startW + delta));
        applyWidth(newW);
    });

    document.addEventListener('mouseup', function () {
        if (!dragging) return;
        dragging = false;
        handle.classList.remove('dragging');
        document.body.style.cursor     = '';
        document.body.style.userSelect = '';
        localStorage.setItem(STORAGE_KEY, preview.offsetWidth);
    });
}());

// ── Bildzoom ──────────────────────────────────────────────────
(function () {
    const ZOOM_KEY = 'beleg_img_zoom';
    const STEP     = 1.25;
    const MIN      = 0.25;
    const MAX      = 5;

    const img  = document.getElementById('beleg-img');
    const wrap = document.getElementById('img-zoom-wrap');
    const lvl  = document.getElementById('img-zoom-level');
    if (!img || !wrap) return;

    let scale = 1;

    function applyScale(s) {
        scale = Math.max(MIN, Math.min(MAX, s));
        img.style.width = Math.round(scale * 100) + '%';
        if (lvl) lvl.textContent = Math.round(scale * 100) + ' %';
        wrap.style.cursor = scale > 1 ? 'grab' : 'zoom-in';
        localStorage.setItem(ZOOM_KEY, scale);
    }

    window.imgZoom      = function (dir) { applyScale(dir > 0 ? scale * STEP : scale / STEP); };
    window.imgZoomReset = function ()    { applyScale(1); };

    const saved = parseFloat(localStorage.getItem(ZOOM_KEY));
    if (!isNaN(saved) && saved > 0) applyScale(saved);

    wrap.addEventListener('wheel', function (e) {
        if (!e.ctrlKey) return;
        e.preventDefault();
        applyScale(e.deltaY < 0 ? scale * STEP : scale / STEP);
    }, { passive: false });

    document.addEventListener('keydown', function (e) {
        if (!e.ctrlKey || !document.getElementById('beleg-img')) return;
        if (e.key === '+' || e.key === '=') { e.preventDefault(); imgZoom(+1); }
        if (e.key === '-')                  { e.preventDefault(); imgZoom(-1); }
        if (e.key === '0')                  { e.preventDefault(); imgZoomReset(); }
    });
}());