// logs.js - Structured order viewer with text log fallback

let currentRunId = null;
let runsPage = 1;
let logPollTimer = null;
let currentFilter = 'all';
let ordersPage = 1;
let currentQmSku = '';
let currentQmOrderNumber = '';
let ordersSortColumn = 'created_at';
let ordersSortDirection = 'asc';

function esc(s) {
    if (s == null) return '';
    return String(s)
        .replace(/&/g, '&amp;').replace(/</g, '&lt;')
        .replace(/>/g, '&gt;').replace(/"/g, '&quot;')
        .replace(/'/g, '&#39;');
}

function fmtDuration(startedAt, finishedAt) {
    if (!startedAt || !finishedAt) return '-';
    const diffMs = new Date(finishedAt) - new Date(startedAt);
    if (isNaN(diffMs) || diffMs < 0) return '-';
    const secs = Math.round(diffMs / 1000);
    if (secs < 60) return secs + 's';
    return Math.floor(secs / 60) + 'm ' + (secs % 60) + 's';
}

function fmtDate(dateStr) {
    if (!dateStr) return '-';
    try {
        const d = new Date(dateStr);
        const hasTime = dateStr.includes(':');
        if (hasTime) {
            return d.toLocaleString('ro-RO', { day: '2-digit', month: '2-digit', year: 'numeric', hour: '2-digit', minute: '2-digit', second: '2-digit' });
        }
        return d.toLocaleDateString('ro-RO', { day: '2-digit', month: '2-digit', year: 'numeric' });
    } catch { return dateStr; }
}

function runStatusBadge(status) {
    switch ((status || '').toLowerCase()) {
        case 'completed': return '<span class="badge bg-success">completed</span>';
        case 'running':   return '<span class="badge bg-primary">running</span>';
        case 'failed':    return '<span class="badge bg-danger">failed</span>';
        default:          return `<span class="badge bg-secondary">${esc(status)}</span>`;
    }
}

function orderStatusBadge(status) {
    switch ((status || '').toUpperCase()) {
        case 'IMPORTED': return '<span class="badge bg-success">Importat</span>';
        case 'SKIPPED':  return '<span class="badge bg-warning text-dark">Omis</span>';
        case 'ERROR':    return '<span class="badge bg-danger">Eroare</span>';
        default:         return `<span class="badge bg-secondary">${esc(status)}</span>`;
    }
}

// ── Runs Dropdown ────────────────────────────────

async function loadRuns() {
    // Load all recent runs for dropdown
    try {
        const res = await fetch(`/api/sync/history?page=1&per_page=100`);
        if (!res.ok) throw new Error('HTTP ' + res.status);
        const data = await res.json();
        const runs = data.runs || [];

        const dd = document.getElementById('runsDropdown');
        if (runs.length === 0) {
            dd.innerHTML = '<option value="">Niciun sync run</option>';
        } else {
            dd.innerHTML = '<option value="">-- Selecteaza un run --</option>' +
                runs.map(r => {
                    const started = r.started_at ? new Date(r.started_at).toLocaleString('ro-RO', {day:'2-digit',month:'2-digit',year:'numeric',hour:'2-digit',minute:'2-digit'}) : '?';
                    const st = (r.status || '').toUpperCase();
                    const statusEmoji = st === 'COMPLETED' ? '✓' : st === 'RUNNING' ? '⟳' : '✗';
                    const imp = r.imported || 0;
                    const skip = r.skipped || 0;
                    const err = r.errors || 0;
                    const label = `${started} — ${statusEmoji} ${r.status} (${imp} imp, ${skip} skip, ${err} err)`;
                    const selected = r.run_id === currentRunId ? 'selected' : '';
                    return `<option value="${esc(r.run_id)}" ${selected}>${esc(label)}</option>`;
                }).join('');
        }
    } catch (err) {
        const dd = document.getElementById('runsDropdown');
        dd.innerHTML = `<option value="">Eroare: ${esc(err.message)}</option>`;
    }
}

// ── Run Selection ────────────────────────────────

async function selectRun(runId) {
    if (logPollTimer) { clearInterval(logPollTimer); logPollTimer = null; }

    currentRunId = runId;
    currentFilter = 'all';
    ordersPage = 1;

    const url = new URL(window.location);
    if (runId) { url.searchParams.set('run', runId); } else { url.searchParams.delete('run'); }
    history.replaceState(null, '', url);

    // Sync dropdown selection
    const dd = document.getElementById('runsDropdown');
    if (dd && dd.value !== runId) dd.value = runId;

    if (!runId) {
        document.getElementById('logViewerSection').style.display = 'none';
        return;
    }

    document.getElementById('logViewerSection').style.display = '';
    document.getElementById('logRunId').textContent = runId;
    document.getElementById('logStatusBadge').innerHTML = '<span class="badge bg-secondary">...</span>';
    document.getElementById('textLogSection').style.display = 'none';

    await loadRunOrders(runId, 'all', 1);

    // Also load text log in background
    fetchTextLog(runId);
}

// ── Per-Order Filtering (R1) ─────────────────────

async function loadRunOrders(runId, statusFilter, page) {
    if (statusFilter != null) currentFilter = statusFilter;
    if (page != null) ordersPage = page;

    // Update filter button styles
    document.querySelectorAll('#orderFilterBtns button').forEach(btn => {
        btn.className = btn.className.replace(' btn-primary', ' btn-outline-primary')
            .replace(' btn-success', ' btn-outline-success')
            .replace(' btn-warning', ' btn-outline-warning')
            .replace(' btn-danger', ' btn-outline-danger');
    });

    try {
        const res = await fetch(`/api/sync/run/${encodeURIComponent(runId)}/orders?status=${currentFilter}&page=${ordersPage}&per_page=50&sort_by=${ordersSortColumn}&sort_dir=${ordersSortDirection}`);
        if (!res.ok) throw new Error('HTTP ' + res.status);
        const data = await res.json();

        const counts = data.counts || {};
        document.getElementById('countAll').textContent = counts.total || 0;
        document.getElementById('countImported').textContent = counts.imported || 0;
        document.getElementById('countSkipped').textContent = counts.skipped || 0;
        document.getElementById('countError').textContent = counts.error || 0;

        // Highlight active filter
        const filterMap = { 'all': 0, 'IMPORTED': 1, 'SKIPPED': 2, 'ERROR': 3 };
        const btns = document.querySelectorAll('#orderFilterBtns button');
        const idx = filterMap[currentFilter] || 0;
        if (btns[idx]) {
            const colorMap = ['primary', 'success', 'warning', 'danger'];
            btns[idx].className = btns[idx].className.replace(`btn-outline-${colorMap[idx]}`, `btn-${colorMap[idx]}`);
        }

        const tbody = document.getElementById('runOrdersBody');
        const orders = data.orders || [];

        if (orders.length === 0) {
            tbody.innerHTML = '<tr><td colspan="6" class="text-center text-muted py-3">Nicio comanda</td></tr>';
        } else {
            tbody.innerHTML = orders.map((o, i) => {
                const dateStr = fmtDate(o.order_date);
                return `<tr style="cursor:pointer" onclick="openOrderDetail('${esc(o.order_number)}')">
                    <td>${(ordersPage - 1) * 50 + i + 1}</td>
                    <td>${dateStr}</td>
                    <td><code>${esc(o.order_number)}</code></td>
                    <td>${esc(o.customer_name)}</td>
                    <td>${o.items_count || 0}</td>
                    <td>${orderStatusBadge(o.status)}</td>
                </tr>`;
            }).join('');
        }

        // Orders pagination
        const totalPages = data.pages || 1;
        const infoEl = document.getElementById('ordersPageInfo');
        infoEl.textContent = `${data.total || 0} comenzi | Pagina ${ordersPage} din ${totalPages}`;

        const pagDiv = document.getElementById('ordersPagination');
        if (totalPages > 1) {
            pagDiv.innerHTML = `
                <button class="btn btn-sm btn-outline-secondary" ${ordersPage <= 1 ? 'disabled' : ''} onclick="loadRunOrders('${esc(runId)}', null, ${ordersPage - 1})"><i class="bi bi-chevron-left"></i></button>
                <small class="text-muted">${ordersPage} / ${totalPages}</small>
                <button class="btn btn-sm btn-outline-secondary" ${ordersPage >= totalPages ? 'disabled' : ''} onclick="loadRunOrders('${esc(runId)}', null, ${ordersPage + 1})"><i class="bi bi-chevron-right"></i></button>
            `;
        } else {
            pagDiv.innerHTML = '';
        }

        // Update run status badge
        const runRes = await fetch(`/api/sync/run/${encodeURIComponent(runId)}`);
        const runData = await runRes.json();
        if (runData.run) {
            document.getElementById('logStatusBadge').innerHTML = runStatusBadge(runData.run.status);
        }
    } catch (err) {
        document.getElementById('runOrdersBody').innerHTML =
            `<tr><td colspan="6" class="text-center text-danger">${esc(err.message)}</td></tr>`;
    }
}

function filterOrders(status) {
    loadRunOrders(currentRunId, status, 1);
}

function sortOrdersBy(col) {
    if (ordersSortColumn === col) {
        ordersSortDirection = ordersSortDirection === 'asc' ? 'desc' : 'asc';
    } else {
        ordersSortColumn = col;
        ordersSortDirection = 'asc';
    }
    // Update sort icons
    document.querySelectorAll('#logViewerSection .sort-icon').forEach(span => {
        const c = span.dataset.col;
        span.textContent = c === ordersSortColumn ? (ordersSortDirection === 'asc' ? '\u2191' : '\u2193') : '';
    });
    loadRunOrders(currentRunId, null, 1);
}

// ── Text Log (collapsible) ──────────────────────

function toggleTextLog() {
    const section = document.getElementById('textLogSection');
    section.style.display = section.style.display === 'none' ? '' : 'none';
    if (section.style.display !== 'none' && currentRunId) {
        fetchTextLog(currentRunId);
    }
}

async function fetchTextLog(runId) {
    // Clear any existing poll timer to prevent accumulation
    if (logPollTimer) { clearInterval(logPollTimer); logPollTimer = null; }

    try {
        const res = await fetch(`/api/sync/run/${encodeURIComponent(runId)}/text-log`);
        if (!res.ok) throw new Error('HTTP ' + res.status);
        const data = await res.json();

        document.getElementById('logContent').textContent = data.text || '(log gol)';

        if (!data.finished) {
            if (document.getElementById('autoRefreshToggle')?.checked) {
                logPollTimer = setInterval(async () => {
                    try {
                        const r = await fetch(`/api/sync/run/${encodeURIComponent(runId)}/text-log`);
                        const d = await r.json();
                        if (currentRunId !== runId) { clearInterval(logPollTimer); return; }
                        document.getElementById('logContent').textContent = d.text || '(log gol)';
                        const el = document.getElementById('logContent');
                        el.scrollTop = el.scrollHeight;
                        if (d.finished) {
                            clearInterval(logPollTimer);
                            logPollTimer = null;
                            loadRuns();
                            loadRunOrders(runId, currentFilter, ordersPage);
                        }
                    } catch (e) { console.error('Poll error:', e); }
                }, 2500);
            }
        }
    } catch (err) {
        document.getElementById('logContent').textContent = 'Eroare: ' + err.message;
    }
}

// ── Multi-CODMAT helper (D1) ─────────────────────

function renderCodmatCell(item) {
    if (!item.codmat_details || item.codmat_details.length === 0) {
        return `<code>${esc(item.codmat || '-')}</code>`;
    }
    if (item.codmat_details.length === 1) {
        const d = item.codmat_details[0];
        return `<code>${esc(d.codmat)}</code>`;
    }
    // Multi-CODMAT: compact list
    return item.codmat_details.map(d =>
        `<div class="small"><code>${esc(d.codmat)}</code> <span class="text-muted">\xd7${d.cantitate_roa} (${d.procent_pret}%)</span></div>`
    ).join('');
}

// ── Order Detail Modal (R9) ─────────────────────

async function openOrderDetail(orderNumber) {
    document.getElementById('detailOrderNumber').textContent = '#' + orderNumber;
    document.getElementById('detailCustomer').textContent = '...';
    document.getElementById('detailDate').textContent = '';
    document.getElementById('detailStatus').innerHTML = '';
    document.getElementById('detailIdComanda').textContent = '-';
    document.getElementById('detailIdPartener').textContent = '-';
    document.getElementById('detailIdAdresaFact').textContent = '-';
    document.getElementById('detailIdAdresaLivr').textContent = '-';
    document.getElementById('detailItemsBody').innerHTML = '<tr><td colspan="8" class="text-center">Se incarca...</td></tr>';
    document.getElementById('detailError').style.display = 'none';

    const modalEl = document.getElementById('orderDetailModal');
    const existing = bootstrap.Modal.getInstance(modalEl);
    if (existing) { existing.show(); } else { new bootstrap.Modal(modalEl).show(); }

    try {
        const res = await fetch(`/api/sync/order/${encodeURIComponent(orderNumber)}`);
        const data = await res.json();

        if (data.error) {
            document.getElementById('detailError').textContent = data.error;
            document.getElementById('detailError').style.display = '';
            return;
        }

        const order = data.order || {};
        document.getElementById('detailCustomer').textContent = order.customer_name || '-';
        document.getElementById('detailDate').textContent = fmtDate(order.order_date);
        document.getElementById('detailStatus').innerHTML = orderStatusBadge(order.status);
        document.getElementById('detailIdComanda').textContent = order.id_comanda || '-';
        document.getElementById('detailIdPartener').textContent = order.id_partener || '-';
        document.getElementById('detailIdAdresaFact').textContent = order.id_adresa_facturare || '-';
        document.getElementById('detailIdAdresaLivr').textContent = order.id_adresa_livrare || '-';

        if (order.error_message) {
            document.getElementById('detailError').textContent = order.error_message;
            document.getElementById('detailError').style.display = '';
        }

        const items = data.items || [];
        if (items.length === 0) {
            document.getElementById('detailItemsBody').innerHTML = '<tr><td colspan="8" class="text-center text-muted">Niciun articol</td></tr>';
            return;
        }

        document.getElementById('detailItemsBody').innerHTML = items.map(item => {
            let statusBadge;
            switch (item.mapping_status) {
                case 'mapped':  statusBadge = '<span class="badge bg-success">Mapat</span>'; break;
                case 'direct':  statusBadge = '<span class="badge bg-info">Direct</span>'; break;
                case 'missing': statusBadge = '<span class="badge bg-warning text-dark">Lipsa</span>'; break;
                default:        statusBadge = '<span class="badge bg-secondary">?</span>';
            }

            const action = item.mapping_status === 'missing'
                ? `<a href="#" class="btn-map-icon" onclick="openQuickMap('${esc(item.sku)}', '${esc(item.product_name || '')}', '${esc(orderNumber)}'); return false;" title="Mapeaza"><i class="bi bi-link-45deg"></i></a>`
                : '';

            return `<tr>
                <td><code>${esc(item.sku)}</code></td>
                <td>${esc(item.product_name || '-')}</td>
                <td>${item.quantity || 0}</td>
                <td>${item.price != null ? Number(item.price).toFixed(2) : '-'}</td>
                <td>${item.vat != null ? Number(item.vat).toFixed(2) : '-'}</td>
                <td>${renderCodmatCell(item)}</td>
                <td>${statusBadge}</td>
                <td>${action}</td>
            </tr>`;
        }).join('');
    } catch (err) {
        document.getElementById('detailError').textContent = err.message;
        document.getElementById('detailError').style.display = '';
    }
}

// ── Quick Map Modal (from order detail) ──────────

let qmAcTimeout = null;

function openQuickMap(sku, productName, orderNumber) {
    currentQmSku = sku;
    currentQmOrderNumber = orderNumber;
    document.getElementById('qmSku').textContent = sku;
    document.getElementById('qmProductName').textContent = productName || '-';
    document.getElementById('qmPctWarning').style.display = 'none';

    // Reset CODMAT lines
    const container = document.getElementById('qmCodmatLines');
    container.innerHTML = '';
    addQmCodmatLine();

    // Show quick map on top of order detail (modal stacking)
    new bootstrap.Modal(document.getElementById('quickMapModal')).show();
}

function addQmCodmatLine() {
    const container = document.getElementById('qmCodmatLines');
    const idx = container.children.length;
    const div = document.createElement('div');
    div.className = 'border rounded p-2 mb-2 qm-line';
    div.innerHTML = `
        <div class="mb-2 position-relative">
            <label class="form-label form-label-sm mb-1">CODMAT (Articol ROA)</label>
            <input type="text" class="form-control form-control-sm qm-codmat" placeholder="Cauta codmat sau denumire..." autocomplete="off">
            <div class="autocomplete-dropdown d-none qm-ac-dropdown"></div>
            <small class="text-muted qm-selected"></small>
        </div>
        <div class="row">
            <div class="col-5">
                <label class="form-label form-label-sm mb-1">Cantitate ROA</label>
                <input type="number" class="form-control form-control-sm qm-cantitate" value="1" step="0.001" min="0.001">
            </div>
            <div class="col-5">
                <label class="form-label form-label-sm mb-1">Procent Pret (%)</label>
                <input type="number" class="form-control form-control-sm qm-procent" value="100" step="0.01" min="0" max="100">
            </div>
            <div class="col-2 d-flex align-items-end">
                ${idx > 0 ? `<button type="button" class="btn btn-sm btn-outline-danger" onclick="this.closest('.qm-line').remove()"><i class="bi bi-x"></i></button>` : ''}
            </div>
        </div>
    `;
    container.appendChild(div);

    // Setup autocomplete on the new input
    const input = div.querySelector('.qm-codmat');
    const dropdown = div.querySelector('.qm-ac-dropdown');
    const selected = div.querySelector('.qm-selected');

    input.addEventListener('input', () => {
        clearTimeout(qmAcTimeout);
        qmAcTimeout = setTimeout(() => qmAutocomplete(input, dropdown, selected), 250);
    });
    input.addEventListener('blur', () => {
        setTimeout(() => dropdown.classList.add('d-none'), 200);
    });
}

async function qmAutocomplete(input, dropdown, selectedEl) {
    const q = input.value;
    if (q.length < 2) { dropdown.classList.add('d-none'); return; }

    try {
        const res = await fetch(`/api/articles/search?q=${encodeURIComponent(q)}`);
        const data = await res.json();
        if (!data.results || data.results.length === 0) { dropdown.classList.add('d-none'); return; }

        dropdown.innerHTML = data.results.map(r =>
            `<div class="autocomplete-item" onmousedown="qmSelectArticle(this, '${esc(r.codmat)}', '${esc(r.denumire)}${r.um ? ' (' + esc(r.um) + ')' : ''}')">
                <span class="codmat">${esc(r.codmat)}</span> — <span class="denumire">${esc(r.denumire)}</span>${r.um ? ` <small class="text-muted">(${esc(r.um)})</small>` : ''}
            </div>`
        ).join('');
        dropdown.classList.remove('d-none');
    } catch { dropdown.classList.add('d-none'); }
}

function qmSelectArticle(el, codmat, label) {
    const line = el.closest('.qm-line');
    line.querySelector('.qm-codmat').value = codmat;
    line.querySelector('.qm-selected').textContent = label;
    line.querySelector('.qm-ac-dropdown').classList.add('d-none');
}

async function saveQuickMapping() {
    const lines = document.querySelectorAll('.qm-line');
    const mappings = [];

    for (const line of lines) {
        const codmat = line.querySelector('.qm-codmat').value.trim();
        const cantitate = parseFloat(line.querySelector('.qm-cantitate').value) || 1;
        const procent = parseFloat(line.querySelector('.qm-procent').value) || 100;
        if (!codmat) continue;
        mappings.push({ codmat, cantitate_roa: cantitate, procent_pret: procent });
    }

    if (mappings.length === 0) { alert('Selecteaza cel putin un CODMAT'); return; }

    // Validate percentage sum for multi-line
    if (mappings.length > 1) {
        const totalPct = mappings.reduce((s, m) => s + m.procent_pret, 0);
        if (Math.abs(totalPct - 100) > 0.01) {
            document.getElementById('qmPctWarning').textContent = `Suma procentelor trebuie sa fie 100% (actual: ${totalPct.toFixed(2)}%)`;
            document.getElementById('qmPctWarning').style.display = '';
            return;
        }
    }
    document.getElementById('qmPctWarning').style.display = 'none';

    try {
        let res;
        if (mappings.length === 1) {
            res = await fetch('/api/mappings', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ sku: currentQmSku, codmat: mappings[0].codmat, cantitate_roa: mappings[0].cantitate_roa, procent_pret: mappings[0].procent_pret })
            });
        } else {
            res = await fetch('/api/mappings/batch', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ sku: currentQmSku, mappings })
            });
        }
        const data = await res.json();
        if (data.success) {
            bootstrap.Modal.getInstance(document.getElementById('quickMapModal')).hide();
            // Refresh order detail items in the still-open modal
            if (currentQmOrderNumber) openOrderDetail(currentQmOrderNumber);
            // Refresh orders view
            loadRunOrders(currentRunId, currentFilter, ordersPage);
        } else {
            alert('Eroare: ' + (data.error || 'Unknown'));
        }
    } catch (err) {
        alert('Eroare: ' + err.message);
    }
}

// ── Init ────────────────────────────────────────

document.addEventListener('DOMContentLoaded', () => {
    loadRuns();

    const preselected = document.getElementById('preselectedRun');
    const urlParams = new URLSearchParams(window.location.search);
    const runFromUrl = urlParams.get('run') || (preselected ? preselected.value : '');
    if (runFromUrl) {
        selectRun(runFromUrl);
    }

    document.getElementById('autoRefreshToggle')?.addEventListener('change', (e) => {
        if (e.target.checked) {
            // Resume polling if we have an active run
            if (currentRunId) fetchTextLog(currentRunId);
        } else {
            // Pause polling
            if (logPollTimer) { clearInterval(logPollTimer); logPollTimer = null; }
        }
    });
});