function itTabSwitch(tab) {
    document.querySelectorAll('.it-panel').forEach(function (panel) {
        panel.style.display = panel.id === 'it-panel-' + tab ? '' : 'none';
    });
    document.querySelectorAll('.it-tab-btn').forEach(function (btn) {
        var active = btn.getAttribute('data-tab') === tab;
        btn.classList.toggle('it-tab-active', active);
        btn.style.background = active ? 'var(--color-card)' : 'transparent';
        btn.style.color = active ? 'var(--color-card-foreground)' : 'var(--color-muted-foreground)';
        btn.style.boxShadow = active ? '0 1px 2px rgb(0 0 0/0.08)' : '';
    });
}

function itToggleRow(key) {
    var row = document.getElementById('it-row-' + key);
    var toggle = document.getElementById('it-toggle-' + key);
    if (!row) return;
    var opening = row.style.display === 'none';
    row.style.display = opening ? 'table-row' : 'none';
    if (toggle) toggle.style.transform = opening ? 'rotate(90deg)' : '';
}

function itIsModal(panel) {
    return panel && panel.getAttribute('role') === 'dialog';
}

function itPanelOpen(id) {
    var panel = document.getElementById(id);
    if (!panel) return;
    if (itIsModal(panel)) {
        panel.style.display = 'flex';
        document.body.style.overflow = 'hidden';
        if (typeof initSearchableSelects === 'function') initSearchableSelects(panel);
        return;
    }
    var overlay = document.getElementById(id + '-overlay');
    if (overlay) overlay.style.display = 'block';
    panel.style.transform = 'translateX(0)';
    document.body.style.overflow = 'hidden';
}

function itPanelClose(id) {
    var panel = document.getElementById(id);
    if (!panel) return;
    if (itIsModal(panel)) {
        panel.style.display = 'none';
        document.body.style.overflow = '';
        return;
    }
    var overlay = document.getElementById(id + '-overlay');
    if (overlay) overlay.style.display = 'none';
    panel.style.transform = 'translateX(100%)';
    document.body.style.overflow = '';
}

var IT_EQ_DRAFT_KEY = 'it-equipment-draft';

function itEquipmentDraftSave() {
    var form = document.querySelector('#it-equipment-panel form');
    if (!form || !window.sessionStorage) return;
    var data = {};
    form.querySelectorAll('input, textarea, select').forEach(function (el) {
        if (!el.name || el.name === 'csrfmiddlewaretoken') return;
        if (el.type === 'checkbox' || el.type === 'radio') {
            data[el.name] = el.checked ? (el.value || '1') : '';
            data['__checked__' + el.name] = el.checked;
        } else {
            data[el.name] = el.value;
        }
    });
    try { sessionStorage.setItem(IT_EQ_DRAFT_KEY, JSON.stringify(data)); } catch (e) {}
}

function itEquipmentDraftRestore() {
    if (!window.sessionStorage) return;
    var raw;
    try { raw = sessionStorage.getItem(IT_EQ_DRAFT_KEY); } catch (e) { return; }
    if (!raw) return;
    var data;
    try { data = JSON.parse(raw); } catch (e) { return; }
    var form = document.querySelector('#it-equipment-panel form');
    if (!form) return;
    Object.keys(data).forEach(function (name) {
        if (name.indexOf('__checked__') === 0) return;
        var el = form.querySelector('[name="' + name + '"]');
        if (!el) return;
        if (el.type === 'checkbox' || el.type === 'radio') {
            el.checked = !!data['__checked__' + name];
        } else {
            el.value = data[name] || '';
            if (el.tagName === 'SELECT') {
                el.dispatchEvent(new Event('change', { bubbles: true }));
            }
        }
    });
    var model = document.getElementById('it-equipment-model-select');
    if (model && model.value && typeof itSetSearchableSelectValue === 'function') {
        itSetSearchableSelectValue('it-equipment-model-select', model.value);
    }
}

function itEquipmentDraftClear() {
    try { sessionStorage.removeItem(IT_EQ_DRAFT_KEY); } catch (e) {}
}

function itModelsOpenCatalog() {
    var ret = document.getElementById('it-models-return-to');
    if (ret) ret.value = '';
    itPanelOpen('it-equipment-models-panel');
}

function itModelsOpenFromEquipment() {
    itEquipmentDraftSave();
    var ret = document.getElementById('it-models-return-to');
    if (ret) ret.value = 'equipment';
    itPanelClose('it-equipment-panel');
    itPanelOpen('it-equipment-models-panel');
}

function itModelsDismiss() {
    var ret = document.getElementById('it-models-return-to');
    var back = ret && ret.value === 'equipment';
    itPanelClose('it-equipment-models-panel');
    if (back) {
        itPanelOpen('it-equipment-panel');
        itEquipmentDraftRestore();
    }
}

function itModalsInit(root) {
    if (!root) return;
    if (root.getAttribute('data-it-models-open') === '1') {
        itPanelOpen('it-equipment-models-panel');
        return;
    }
    if (root.getAttribute('data-it-equipment-open') === '1') {
        itPanelOpen('it-equipment-panel');
        itEquipmentDraftRestore();
        var mid = root.getAttribute('data-it-select-model-id');
        if (mid) itSetSearchableSelectValue('it-equipment-model-select', mid);
        itEquipmentDraftClear();
    }
    if (root.getAttribute('data-it-worklog-open') === '1') itPanelOpen('it-worklog-panel');
}

function itContractServiceToggle(serviceTypeCode) {
    var block = document.getElementById('it-contract-ip-block');
    if (!block) return;
    var show = serviceTypeCode === 'internet';
    block.style.display = show ? '' : 'none';
    if (!show) {
        var checkbox = block.querySelector('input[name=dedicated_ip]');
        var ipField = document.getElementById('it-contract-ip-field');
        if (checkbox) checkbox.checked = false;
        if (ipField) ipField.style.display = 'none';
    }
}

function itContractFrameworkToggle(isFramework) {
    var parentWrap = document.getElementById('it-contract-parent-wrap');
    var locationWrap = document.getElementById('it-contract-location-wrap');
    var locationSelect = document.getElementById('it-contract-location-select');
    var locationRequired = document.getElementById('it-contract-location-required');

    if (parentWrap) {
        parentWrap.style.display = isFramework ? 'none' : '';
    }
    if (isFramework) {
        var sel = document.getElementById('it-contract-parent-select');
        if (sel) sel.value = '';
    }

    if (locationWrap) {
        locationWrap.style.display = isFramework ? 'none' : '';
    }
    if (locationSelect) {
        locationSelect.required = !isFramework;
        if (isFramework) locationSelect.value = '';
    }
    if (locationRequired) {
        locationRequired.style.display = isFramework ? 'none' : '';
    }
}

function itContractFilterParents() {
    var providerSelect = document.getElementById('it-contract-provider-select');
    var parentSelect = document.getElementById('it-contract-parent-select');
    if (!providerSelect || !parentSelect) return;
    var providerId = providerSelect.value;
    Array.prototype.forEach.call(parentSelect.options, function (opt) {
        if (!opt.value) {
            opt.hidden = false;
            return;
        }
        opt.hidden = providerId && opt.getAttribute('data-provider') !== providerId;
    });
    if (parentSelect.selectedOptions[0] && parentSelect.selectedOptions[0].hidden) {
        parentSelect.value = '';
    }
}

// --- Масовий вибір екземплярів обладнання ---
// --- Выдача оборудования: тип → список ---
function itAssignTargetChanged(selectEl) {
    var root = selectEl.closest('[data-assign-widget]');
    if (!root) return;
    var target = selectEl.value || '';
    root.querySelectorAll('[data-assign-pick]').forEach(function (pick) {
        var match = pick.getAttribute('data-assign-pick') === target;
        pick.style.display = match ? '' : 'none';
        pick.querySelectorAll('select').forEach(function (inp) {
            inp.disabled = !match;
            if (!match) {
                inp.value = '';
                // searchable-select слушает change
                inp.dispatchEvent(new Event('change', { bubbles: true }));
            }
        });
    });
}

function itBulkToggleAll(headerCheckbox) {
    document.querySelectorAll('.it-equip-check').forEach(function (cb) {
        cb.checked = headerCheckbox.checked;
    });
    itBulkUpdate();
}

function itBulkUpdate() {
    var checked = Array.prototype.slice.call(document.querySelectorAll('.it-equip-check:checked'));
    var panel = document.getElementById('it-equipment-bulk-assign');
    var countEl = document.getElementById('it-bulk-assign-count');
    var inputs = document.getElementById('it-bulk-assign-inputs');
    if (!panel) return;
    if (checked.length) {
        panel.style.display = 'block';
        if (countEl) countEl.textContent = checked.length;
        if (inputs) {
            // переносимо id відмічених у hidden-поля всередині форми видачі
            inputs.innerHTML = '';
            checked.forEach(function (cb) {
                var hidden = document.createElement('input');
                hidden.type = 'hidden';
                hidden.name = 'equipment_ids';
                hidden.value = cb.value;
                inputs.appendChild(hidden);
            });
        }
    } else {
        panel.style.display = 'none';
    }
}

function itBulkClearSelection() {
    document.querySelectorAll('.it-equip-check').forEach(function (cb) { cb.checked = false; });
    var headerAll = document.querySelector('th input[onclick^="itBulkToggleAll"]');
    if (headerAll) headerAll.checked = false;
    itBulkUpdate();
}

function itEquipmentOpenLabels() {
    var checked = Array.prototype.slice.call(document.querySelectorAll('.it-equip-check:checked'));
    if (!checked.length) return;
    var ids = checked.map(function (cb) { return cb.value; });
    // Печать строго по сохранённому шаблону (все блоки из layout)
    var url = '/it-manager/equipment/labels/?ids=' + encodeURIComponent(ids.join(','));
    window.open(url, '_blank', 'noopener');
}

/** EAN-13 check digit + тело 200 + pk(9) — как на сервере. */
function itEquipmentEan13(pk) {
    var body = '200' + String(pk).padStart(9, '0');
    var sum = 0;
    for (var i = 0; i < 12; i++) {
        var d = parseInt(body.charAt(i), 10);
        sum += (i % 2 === 0) ? d : d * 3;
    }
    var check = (10 - (sum % 10)) % 10;
    return body + String(check);
}

function itFillInventoryEan(btn, pk) {
    var input = document.getElementById('it-inv-' + pk);
    var flag = document.getElementById('it-auto-inv-' + pk);
    if (!input) return;
    input.value = itEquipmentEan13(pk);
    if (flag) flag.value = '1';
    input.focus();
}

function itSetSearchableSelectValue(selectId, value) {
    var select = document.getElementById(selectId);
    if (!select) return;
    select.value = value || '';
    select.dispatchEvent(new Event('change', { bubbles: true }));
    var widget = select.closest('.searchable-select');
    if (widget && widget._search) {
        var opt = select.options[select.selectedIndex];
        widget._search.value = (opt && opt.value) ? opt.textContent : '';
        if (typeof widget._updateClear === 'function') widget._updateClear();
        else if (widget._clear) widget._clear.style.display = select.value ? 'flex' : 'none';
    }
}

function itWorkCatalogData() {
    var el = document.getElementById('it-work-catalog-data');
    if (!el) return { categories: [], works: [], detail_labels: {} };
    try {
        return JSON.parse(el.textContent || '{}');
    } catch (e) {
        return { categories: [], works: [], detail_labels: {} };
    }
}

function itWorklogCategoryChanged() {
    var cat = document.getElementById('it-worklog-category');
    var work = document.getElementById('it-worklog-work');
    if (!work) return;
    var catId = cat ? cat.value : '';
    var data = itWorkCatalogData();
    var works = (data.works || []).filter(function (w) {
        return !catId || String(w.category_id) === String(catId);
    });
    work.innerHTML = '';
    var empty = document.createElement('option');
    empty.value = '';
    empty.textContent = catId ? '— Выберите работу —' : '— Сначала выберите категорию —';
    work.appendChild(empty);
    works.forEach(function (w) {
        var opt = document.createElement('option');
        opt.value = String(w.id);
        opt.textContent = w.name;
        work.appendChild(opt);
    });
    itWorklogWorkChanged();
}

function itWorklogWorkChanged() {
    var workSelect = document.getElementById('it-worklog-work');
    var detailsBox = document.getElementById('it-worklog-details');
    var notesEl = document.getElementById('it-worklog-work-notes');
    if (!detailsBox) return;
    var data = itWorkCatalogData();
    var labels = data.detail_labels || {};
    var workId = workSelect ? workSelect.value : '';
    var work = (data.works || []).find(function (w) { return String(w.id) === String(workId); });
    detailsBox.innerHTML = '';
    if (!work || !(work.required_details || []).length) {
        detailsBox.style.display = 'none';
    } else {
        detailsBox.style.display = 'flex';
        (work.required_details || []).forEach(function (key) {
            var wrap = document.createElement('div');
            var label = document.createElement('label');
            label.style.cssText = 'display:block;font-size:0.8125rem;font-weight:500;color:var(--color-foreground);margin-bottom:0.375rem;';
            label.textContent = labels[key] || key;
            var star = document.createElement('span');
            star.style.color = 'var(--color-destructive)';
            star.textContent = ' *';
            label.appendChild(star);
            var input = document.createElement('input');
            input.type = 'text';
            input.name = 'detail_' + key;
            input.required = true;
            input.className = 'input';
            input.style.width = '100%';
            wrap.appendChild(label);
            wrap.appendChild(input);
            detailsBox.appendChild(wrap);
        });
    }
    if (notesEl) {
        if (work && work.notes) {
            notesEl.style.display = '';
            notesEl.textContent = work.notes;
        } else {
            notesEl.style.display = 'none';
            notesEl.textContent = '';
        }
    }
}

function itWorklogRowCategoryChanged(logPk) {
    var cat = document.getElementById('it-worklog-row-cat-' + logPk);
    var work = document.getElementById('it-worklog-row-work-' + logPk);
    if (!work) return;
    var catId = cat ? cat.value : '';
    var data = itWorkCatalogData();
    var works = (data.works || []).filter(function (w) {
        return catId && String(w.category_id) === String(catId);
    });
    work.innerHTML = '';
    var empty = document.createElement('option');
    empty.value = '';
    empty.textContent = catId ? '— Выберите работу —' : '—';
    work.appendChild(empty);
    works.forEach(function (w) {
        var opt = document.createElement('option');
        opt.value = String(w.id);
        opt.textContent = w.name;
        work.appendChild(opt);
    });
    itWorklogRowWorkChanged(logPk, false);
}

function itWorklogRowWorkChanged(logPk, submit) {
    var workSelect = document.getElementById('it-worklog-row-work-' + logPk);
    var detailsBox = document.getElementById('it-worklog-row-details-' + logPk);
    if (!detailsBox || !workSelect) return;
    var data = itWorkCatalogData();
    var labels = data.detail_labels || {};
    var workId = workSelect.value;
    var work = (data.works || []).find(function (w) { return String(w.id) === String(workId); });
    var formId = 'worklog-form-' + logPk;
    detailsBox.innerHTML = '';
    if (work && (work.required_details || []).length) {
        (work.required_details || []).forEach(function (key) {
            var label = document.createElement('label');
            label.style.cssText = 'font-size:0.6875rem;color:var(--color-muted-foreground);';
            label.textContent = (labels[key] || key) + ' ';
            var input = document.createElement('input');
            input.type = 'text';
            input.name = 'detail_' + key;
            input.setAttribute('form', formId);
            input.className = 'input';
            input.style.cssText = 'width:100%;font-size:0.75rem;padding:0.2rem 0.35rem;margin-top:0.1rem;';
            input.onchange = function () {
                if (input.form) input.form.requestSubmit();
            };
            label.appendChild(document.createElement('br'));
            label.appendChild(input);
            detailsBox.appendChild(label);
        });
    }
    if (submit && workId && workSelect.form) {
        workSelect.form.requestSubmit();
    }
}

function itWorklogFromTicket(ticket) {
    if (!ticket || !ticket.id) return;
    itTabSwitch('worklog');
    itPanelOpen('it-worklog-panel');

    itSetSearchableSelectValue('it-worklog-ticket', String(ticket.id));
    if (ticket.locationId) {
        itSetSearchableSelectValue('it-worklog-location', String(ticket.locationId));
    }
    var equipment = document.getElementById('it-worklog-equipment');
    if (equipment && ticket.equipmentId) {
        equipment.value = String(ticket.equipmentId);
    }
    var description = document.getElementById('it-worklog-description');
    if (description && !description.value) {
        description.value = 'Работа по заявке ' + ticket.number + (ticket.title ? ': ' + ticket.title : '');
    }
    var hint = document.getElementById('it-worklog-ticket-hint');
    if (hint) {
        hint.style.display = '';
        hint.textContent = 'Заявка ' + ticket.number + (ticket.title ? ' — ' + ticket.title : '');
    }
    var catSelect = document.getElementById('it-worklog-category');
    if (catSelect) catSelect.focus();
}

function itWorklogTicketChanged() {
    var select = document.getElementById('it-worklog-ticket');
    if (!select) return;
    var opt = select.options[select.selectedIndex];
    var hint = document.getElementById('it-worklog-ticket-hint');
    if (!opt || !opt.value) {
        if (hint) {
            hint.style.display = 'none';
            hint.textContent = '';
        }
        return;
    }
    var locationId = opt.getAttribute('data-location') || '';
    var equipmentId = opt.getAttribute('data-equipment') || '';
    if (locationId) itSetSearchableSelectValue('it-worklog-location', locationId);
    var equipment = document.getElementById('it-worklog-equipment');
    if (equipment && equipmentId) equipment.value = equipmentId;
    if (hint) {
        hint.style.display = '';
        hint.textContent = opt.textContent.trim();
    }
}

document.addEventListener('change', function (ev) {
    if (ev.target && ev.target.id === 'it-worklog-ticket') {
        itWorklogTicketChanged();
    }
});

function itReportPreviewOpen(url, title) {
    var overlay = document.getElementById('it-report-preview-overlay');
    var modal = document.getElementById('it-report-preview-modal');
    var frame = document.getElementById('it-report-preview-frame');
    var subtitle = document.getElementById('it-report-preview-subtitle');
    var openTab = document.getElementById('it-report-preview-open-tab');
    if (!overlay || !modal || !frame) return;

    if (subtitle) subtitle.textContent = title || '';
    if (openTab) openTab.href = url;
    frame.src = url;
    overlay.style.display = 'block';
    modal.style.display = 'flex';
    document.body.style.overflow = 'hidden';
}

function itReportPreviewClose() {
    var overlay = document.getElementById('it-report-preview-overlay');
    var modal = document.getElementById('it-report-preview-modal');
    var frame = document.getElementById('it-report-preview-frame');
    if (overlay) overlay.style.display = 'none';
    if (modal) modal.style.display = 'none';
    if (frame) frame.src = 'about:blank';
    document.body.style.overflow = '';
}

document.addEventListener('keydown', function (ev) {
    if (ev.key !== 'Escape') return;
    var preview = document.getElementById('it-report-preview-modal');
    if (preview && preview.style.display === 'flex') {
        itReportPreviewClose();
        return;
    }
    var models = document.getElementById('it-equipment-models-panel');
    if (models && models.style.display === 'flex') {
        itModelsDismiss();
        return;
    }
    document.querySelectorAll('[id^="it-"][role="dialog"]').forEach(function (el) {
        if (el.id === 'it-equipment-models-panel' || el.id === 'it-report-preview-modal') return;
        if (el.style.display === 'flex') itPanelClose(el.id);
    });
});

function itPageAfterLoad(scope) {
    var root = (scope || document).querySelector('[data-it-active-tab]');
    if (!root) return;
    if (typeof itTabSwitch === 'function') {
        itTabSwitch(root.getAttribute('data-it-active-tab') || 'equipment');
    }
    if (typeof initSearchableSelects === 'function') {
        initSearchableSelects(scope || document);
    }
    itModalsInit(root);
}

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', function () { itPageAfterLoad(document); });
} else {
    itPageAfterLoad(document);
}

document.addEventListener('htmx:afterSwap', function (ev) {
    var target = ev.detail && ev.detail.target;
    if (!target || target.id !== 'main-content') return;
    itPageAfterLoad(target);
});