/**
 * Discount inline editor for discount_setting Tabular.
 * Scans discount cells after render and enables click-to-edit.
 */
(function() {
    var PROCESSED_CELLS = new WeakSet();
    var SETUP_INTERVAL = 300;

    function findTabular() {
        if (typeof bricks === 'undefined') return null;
        try {
            return bricks.getWidgetById('product_discount_tbl', bricks.app.root);
        } catch(e) {
            return null;
        }
    }

    function setupCell(cell) {
        if (PROCESSED_CELLS.has(cell)) return;
        var text = cell.textContent.trim();
        if (text === '' || isNaN(parseFloat(text))) return;
        PROCESSED_CELLS.add(cell);

        cell.style.cursor = 'pointer';
        cell.title = '点击编辑折扣';

        cell.addEventListener('click', function(e) {
            e.stopPropagation();
            if (cell.querySelector('input')) return;

            var oldVal = cell.textContent.trim();
            var inp = document.createElement('input');
            inp.type = 'number';
            inp.step = '0.01';
            inp.min = '0';
            inp.max = '1';
            inp.value = oldVal;
            inp.style.cssText = 'width:100%;box-sizing:border-box;text-align:center;background:#1E293B;color:#F1F5F9;border:1px solid #3B82F6;border-radius:4px;padding:2px 4px;font-size:12px;';

            cell.textContent = '';
            cell.appendChild(inp);
            inp.focus();
            inp.select();

            var saved = false;
            var saveFn = async function() {
                if (saved) return;
                saved = true;
                var newVal = inp.value.trim();
                inp.disabled = true;

                if (newVal === oldVal) {
                    cell.textContent = oldVal;
                    return;
                }

                try {
                    var url = new URL(window.location.href);
                    var discountid = url.searchParams.get('discountid') || '';
                    var rowEl = cell.closest('.tabular-row');
                    var productId = '';
                    var detailId = '';
                    var dv = findTabular();
                    if (dv && dv.scrollpanel) {
                        for (var i = 0; i < dv.scrollpanel.children.length; i++) {
                            var r = dv.scrollpanel.children[i];
                            if (r.dom_element === rowEl && r.user_data) {
                                productId = r.user_data.productid || '';
                                detailId = r.user_data.detail_id || '';
                                break;
                            }
                        }
                    }

                    var resp = await fetch(
                        url.origin + url.pathname.replace(/\/[^\/]*$/, '/save_discount.dspy'),
                        {
                            method: 'POST',
                            headers: {'Content-Type': 'application/json'},
                            body: JSON.stringify({
                                discountid: discountid,
                                productid: productId,
                                detail_id: detailId,
                                discount: newVal
                            })
                        }
                    );

                    if (resp.ok) {
                        cell.textContent = parseFloat(newVal).toString();
                    } else {
                        cell.textContent = oldVal;
                    }
                } catch(ex) {
                    cell.textContent = oldVal;
                }
            };

            inp.addEventListener('blur', saveFn);
            inp.addEventListener('keydown', function(ev) {
                if (ev.key === 'Enter') { ev.preventDefault(); inp.blur(); }
                if (ev.key === 'Escape') { cell.textContent = oldVal; }
            });
        });
    }

    function scan() {
        var dv = findTabular();
        if (!dv || !dv.scrollpanel || !dv.scrollpanel.dom_element) return;
        var cells = dv.scrollpanel.dom_element.querySelectorAll('.tabular-cell');
        cells.forEach(setupCell);
    }

    // Keep scanning for new cells after each render
    setInterval(scan, SETUP_INTERVAL);
})();