@extends('layouts.master')

@section('title', isset($kso) ? 'Edit Penjualan KSO' : 'Buat Penjualan KSO')

@section('styles')
<link rel="stylesheet" href="{{ asset('build/assets/libs/flatpickr/flatpickr.min.css') }}">
<style>
    .s2-barang .select2-selection--single { height:auto !important; min-height:30px !important; position:relative !important; }
    .s2-barang .select2-selection__rendered { white-space:normal !important; word-break:break-word !important; line-height:1.4 !important; font-size:.82rem !important; padding:4px 44px 4px 8px !important; }
    .s2-barang .select2-selection__arrow { position:absolute !important; right:4px !important; top:50% !important; transform:translateY(-50%) !important; height:20px !important; }
    #tblItems { font-size:.83rem; }
    #tblItems thead th { background:#f8f5ff; color:#7c3aed; border:1px solid #e9d5ff; white-space:nowrap; vertical-align:middle; padding:7px 10px; }
    #tblItems tbody td { border:1px solid #f0e8ff; vertical-align:middle; padding:6px 8px; }
    #tblItems tfoot td { background:#faf5ff; font-weight:600; border:1px solid #e9d5ff; padding:7px 10px; }
    #trInlineAdd td { background:#fdfaff; border:1px solid #e9d5ff; padding:6px 6px; }
    .inline-ctrl { font-size:.8rem !important; padding:3px 7px !important; height:30px; }
    .inline-ctrl-right { text-align:right; }
    .chip-info { display:inline-block; font-size:.75rem; color:#6c757d; }
    .chip-stok { display:inline-block; font-size:.72rem; padding:1px 6px; border-radius:10px; white-space:nowrap; }
    .chip-stok-ok   { background:#d1fae5; color:#065f46; }
    .chip-stok-warn { background:#fee2e2; color:#991b1b; }
    .chip-stok-none { background:#f3f4f6; color:#6b7280; }
    .chip-lot { display:inline-block; font-size:.72rem; padding:1px 7px; border-radius:10px; cursor:pointer; white-space:nowrap; border:1px solid transparent; }
    .chip-lot-unset     { background:#f3f4f6; color:#6b7280; border-color:#d1d5db; }
    .chip-lot-confirmed { background:#d1fae5; color:#065f46; border-color:#6ee7b7; }
    #tblModalLots { font-size:.83rem; }
    #tblModalLots thead th { background:#f8f5ff; color:#7c3aed; border:1px solid #e9d5ff; }
    #tblModalLots tbody td { border:1px solid #f0e8ff; vertical-align:middle; }
    .lot-qty-input { width:70px; text-align:center; font-size:.82rem; padding:2px 4px; height:28px; }
    #lotTotalBar { font-size:.85rem; }
</style>
@endsection

@section('content')
<div class="container-fluid">
    <div class="d-md-flex d-block align-items-center justify-content-between my-4 page-header-breadcrumb">
        <div>
            <p class="fw-semibold fs-18 mb-0">{{ isset($kso) ? 'Edit Penjualan KSO' : 'Buat Penjualan KSO' }}</p>
            <span class="fs-13 text-muted">Penjualan &rarr; KSO &rarr; {{ isset($kso) ? 'Edit' : 'Buat Baru' }}</span>
        </div>
        <a href="{{ route('penjualan-kso.index') }}" class="btn btn-secondary btn-sm mt-2 mt-md-0">
            <i class="bx bx-arrow-back me-1"></i> Kembali
        </a>
    </div>

    <form id="formKso" autocomplete="off">
    @csrf

    {{-- Header --}}
    <div class="card custom-card mb-3">
        <div class="card-header">
            <div class="card-title mb-0"><i class="bx bx-receipt me-2 text-primary"></i>Informasi Penjualan KSO</div>
        </div>
        <div class="card-body">
            <div class="row g-3">
                <div class="col-md-2">
                    <label class="form-label fw-semibold">Nomor KSO</label>
                    <input type="text" class="form-control form-control-sm bg-light" value="{{ $nomor }}" readonly>
                    <small class="text-muted">Digenerate otomatis</small>
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">Tgl. Transaksi</label>
                    <input type="text" class="form-control form-control-sm bg-light"
                           value="{{ isset($kso) ? $kso->tanggal_transaksi->format('d-m-Y') : now()->format('d-m-Y') }}" readonly>
                </div>
                <div class="col-md-4">
                    <label class="form-label fw-semibold">Faskes KSO <span class="text-danger">*</span></label>
                    <select id="selectFaskes" class="form-select form-select-sm" required>
                        <option value="">-- Pilih Faskes KSO --</option>
                        @foreach($faskesList as $f)
                        <option value="{{ $f->id }}" {{ isset($kso) && $kso->faskes_id == $f->id ? 'selected' : '' }}>{{ $f->nama }}</option>
                        @endforeach
                    </select>
                    <div class="invalid-feedback" id="err_faskes_id"></div>
                </div>
                <div class="col-md-4">
                    <label class="form-label fw-semibold">Nama Pasien <span class="text-danger">*</span></label>
                    <input type="text" id="inputNamaPasien" class="form-control form-control-sm"
                           placeholder="Nama lengkap pasien" maxlength="255"
                           value="{{ $kso->nama_pasien ?? '' }}">
                    <div class="invalid-feedback" id="err_nama_pasien"></div>
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">Tgl. Pemakaian <span class="text-danger">*</span></label>
                    <input type="text" id="tglPemakaian" class="form-control form-control-sm flatpickr"
                           placeholder="dd-mm-yyyy"
                           value="{{ isset($kso) && $kso->tgl_pemakaian ? $kso->tgl_pemakaian->format('d-m-Y') : '' }}">
                    <div class="invalid-feedback" id="err_tgl_pemakaian"></div>
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">No. Transaksi</label>
                    <input type="text" id="inputNoTransaksi" class="form-control form-control-sm"
                           placeholder="(opsional)" maxlength="50"
                           value="{{ $kso->no_transaksi ?? '' }}">
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">No. PO</label>
                    <input type="text" id="inputNomorPo" class="form-control form-control-sm"
                           placeholder="(opsional)" maxlength="50"
                           value="{{ $kso->nomor_po ?? '' }}">
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">Tgl. Penjualan</label>
                    <input type="text" id="tanggalPenjualan" class="form-control form-control-sm flatpickr"
                           placeholder="dd-mm-yyyy"
                           value="{{ isset($kso) && $kso->tanggal_penjualan ? $kso->tanggal_penjualan->format('d-m-Y') : '' }}">
                </div>
                <div class="col-md-2">
                    <label class="form-label fw-semibold">Jatuh Tempo</label>
                    <input type="text" id="tanggalJatuhTempo" class="form-control form-control-sm flatpickr"
                           placeholder="dd-mm-yyyy"
                           value="{{ isset($kso) && $kso->tanggal_jatuh_tempo ? $kso->tanggal_jatuh_tempo->format('d-m-Y') : '' }}">
                </div>
                <div class="col-md-4">
                    <label class="form-label fw-semibold">Catatan</label>
                    <textarea id="inputCatatan" class="form-control form-control-sm" rows="2"
                              placeholder="Catatan tambahan (opsional)">{{ $kso->catatan ?? '' }}</textarea>
                </div>
            </div>
        </div>
    </div>

    {{-- Tabel Barang --}}
    <div class="card custom-card mb-3">
        <div class="card-header">
            <div class="card-title mb-0"><i class="bx bx-package me-2 text-primary"></i>Daftar Barang</div>
        </div>
        <div class="card-body p-0">
            <div class="table-responsive">
                <table id="tblItems" class="table mb-0" style="width:100%">
                    <thead>
                        <tr>
                            <th class="text-center" style="width:36px">No</th>
                            <th style="min-width:180px">Barang</th>
                            <th style="width:70px">Ukuran</th>
                            <th class="text-center" style="width:60px">Satuan</th>
                            <th class="text-center" style="width:68px">Qty</th>
                            <th style="width:130px">Harga Jual</th>
                            <th class="text-end" style="width:140px">Subtotal</th>
                            <th class="text-center" style="width:120px">Stok KSO / Lot</th>
                            <th class="text-center" style="width:42px">Aksi</th>
                        </tr>
                    </thead>
                    <tbody id="tbodyItems"></tbody>
                    <tbody id="tbodyInline">
                        <tr id="trInlineAdd">
                            <td class="text-center text-muted" style="width:36px">+</td>
                            <td>
                                <select id="inlineBarang" class="form-select select2-barang" style="width:100%">
                                    <option value="">Ketik kode atau nama barang...</option>
                                </select>
                            </td>
                            <td><span id="inlineUkuran" class="chip-info">—</span></td>
                            <td class="text-center"><span id="inlineSatuan" class="chip-info">—</span></td>
                            <td>
                                <input type="number" id="inlineQty" class="form-control inline-ctrl text-center" min="1" value="1" style="width:60px">
                            </td>
                            <td>
                                <div class="d-flex align-items-center gap-1">
                                    <input type="text" id="inlineHarga" class="form-control inline-ctrl inline-ctrl-right" placeholder="0" style="width:105px">
                                    <span id="inlineHargaWarn" class="text-warning small d-none" title="Tidak ada harga terdaftar">⚠</span>
                                </div>
                            </td>
                            <td></td>
                            <td class="text-center">
                                <span id="inlineStokChip" class="chip-stok chip-stok-none">—</span>
                            </td>
                            <td class="text-center">
                                <button type="button" class="btn btn-primary btn-sm px-2" onclick="tambahItem()" title="Tambahkan">
                                    <i class="bx bx-plus"></i>
                                </button>
                            </td>
                        </tr>
                    </tbody>
                    <tfoot>
                        <tr>
                            <td colspan="6" class="text-end pe-3 text-muted">Subtotal</td>
                            <td id="tdSubtotal" class="text-end pe-3 text-muted">Rp 0</td>
                            <td colspan="2"></td>
                        </tr>
                        <tr>
                            <td colspan="6" class="text-end pe-3 text-muted">DPP (11/12 × Subtotal)</td>
                            <td id="tdDpp" class="text-end pe-3 text-muted">Rp 0</td>
                            <td colspan="2"></td>
                        </tr>
                        <tr>
                            <td colspan="6" class="text-end pe-3 text-muted">PPN 12%</td>
                            <td id="tdPpn" class="text-end pe-3 text-muted">Rp 0</td>
                            <td colspan="2"></td>
                        </tr>
                        <tr class="fw-semibold">
                            <td colspan="6" class="text-end pe-3">
                                Total Harga
                                <button type="button" id="btnResetTotal" class="btn btn-link btn-sm p-0 ms-2 text-muted d-none"
                                        onclick="resetTotal()" title="Kembalikan ke kalkulasi otomatis" style="font-size:.75rem">↺ otomatis</button>
                            </td>
                            <td class="text-end pe-2">
                                <input type="text" id="inputTotal" class="form-control form-control-sm text-end fw-semibold"
                                       style="width:130px;margin-left:auto" placeholder="0"
                                       oninput="onTotalInput(this.value)" onblur="onTotalBlur(this.value)">
                            </td>
                            <td colspan="2"></td>
                        </tr>
                    </tfoot>
                </table>
            </div>
            <div id="alertItemsEmpty" class="alert alert-warning m-3 d-none">
                <i class="bx bx-error-circle me-2"></i> Belum ada barang. Pilih barang lalu klik <strong>+</strong>.
            </div>
        </div>
    </div>

    <div class="d-flex gap-2 justify-content-end mb-4">
        <a href="{{ route('penjualan-kso.index') }}" class="btn btn-secondary">Batal</a>
        <button type="button" class="btn btn-primary" onclick="submitForm()">
            <i class="bx bx-save me-1"></i> Simpan
        </button>
    </div>
    </form>
</div>

{{-- Modal Lot --}}
<div class="modal fade" id="modalLot" tabindex="-1" data-bs-backdrop="static">
    <div class="modal-dialog modal-lg modal-dialog-scrollable">
        <div class="modal-content">
            <div class="modal-header py-2">
                <div>
                    <h6 class="modal-title mb-0" id="modalLotTitle">Detail Lot Stok KSO</h6>
                    <div class="text-muted small" id="modalLotSubtitle"></div>
                </div>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body p-0">
                <div class="table-responsive">
                    <table id="tblModalLots" class="table table-bordered mb-0">
                        <thead>
                            <tr>
                                <th style="width:110px">No. Lot</th>
                                <th style="width:130px">Tgl. Kedaluwarsa</th>
                                <th class="text-center" style="width:90px">Tersedia</th>
                                <th class="text-center" style="width:100px">Qty Ambil</th>
                            </tr>
                        </thead>
                        <tbody id="tbodyModalLots"></tbody>
                    </table>
                </div>
                <div class="px-3 py-2 border-top d-flex align-items-center gap-3" id="lotTotalBar">
                    <span>Total diambil: <strong id="lotTotalAmbil">0</strong> / <strong id="lotQtyTarget">0</strong></span>
                    <span id="lotStatusOk"    class="badge bg-success d-none">✓ Sesuai</span>
                    <span id="lotStatusKurang" class="badge bg-warning text-dark d-none">Kurang</span>
                    <span id="lotStatusLebih"  class="badge bg-danger d-none">Melebihi</span>
                </div>
            </div>
            <div class="modal-footer py-2">
                <button type="button" class="btn btn-sm btn-outline-secondary" id="btnResetFEFO">
                    <i class="bx bx-refresh me-1"></i> Reset ke FEFO
                </button>
                <button type="button" class="btn btn-sm btn-secondary" data-bs-dismiss="modal">Batal</button>
                <button type="button" class="btn btn-sm btn-success" id="btnKonfirmasiLot" disabled>
                    <i class="bx bx-check me-1"></i> Konfirmasi
                </button>
            </div>
        </div>
    </div>
</div>
@endsection

@section('scripts')
<script src="{{ asset('build/assets/libs/flatpickr/flatpickr.min.js') }}"></script>
<script>
@php
$existingItems = isset($kso) ? $kso->items->map(fn($i) => [
    'barang_id'   => $i->barang_id,
    'kode_barang' => $i->kode_barang,
    'nama_barang' => $i->nama_barang,
    'ukuran'      => $i->ukuran,
    'satuan'      => $i->satuan,
    'qty'         => $i->qty,
    'harga_jual'  => (float) $i->harga_jual,
    'stok_total'  => null,
    'stok_lots'   => [],
    'lots'        => $i->itemStoks->map(fn($s) => [
        'stok_id'             => $s->stok_id,
        'no_lot'              => $s->no_lot,
        'tanggal_kedaluwarsa' => $s->tanggal_kedaluwarsa?->format('d-m-Y'),
        'tanggal_kedaluwarsa_iso' => $s->tanggal_kedaluwarsa?->format('Y-m-d'),
        'qty_ambil'           => $s->qty_ambil,
        'qty_tersedia'        => $s->stok?->qty ?? 0,
    ])->values()->all(),
    'lot_confirmed' => $i->itemStoks->isNotEmpty(),
])->values()->all() : [];
@endphp

const BASE_URL       = "{{ url('/') }}";
const CSRF           = "{{ csrf_token() }}";
const IS_EDIT        = {{ isset($kso) ? 'true' : 'false' }};
const KSO_ID         = {{ $kso->id ?? 'null' }};
const EXISTING_ITEMS = @json($existingItems);
const EXISTING_TOTAL = {{ isset($kso) ? (float) $kso->total_harga : 'null' }};
const ROUTE_STORE    = '{{ route("penjualan-kso.store") }}';
const ROUTE_UPDATE   = IS_EDIT ? `{{ url("penjualan-kso") }}/${KSO_ID}` : null;
const ROUTE_BARANG   = '{{ route("penjualan-kso.cari-barang") }}';
const ROUTE_HARGA    = '{{ route("penjualan-kso.harga-jual") }}';
const ROUTE_STOK     = '{{ route("penjualan-kso.stok-tersedia") }}';
const DEFAULT_JT     = {{ $defaultJatuhTempo ?? 'null' }};

let items       = [];
let totalManual = false;
let modalIdx    = -1;
let modalLots   = [];

$(function () {
    const fpJatuhTempo = flatpickr('#tanggalJatuhTempo', { dateFormat: 'd-m-Y' });
    flatpickr('#tglPemakaian', { dateFormat: 'd-m-Y' });
    flatpickr('#tanggalPenjualan', {
        dateFormat: 'd-m-Y',
        onChange: function (sel) {
            if (!DEFAULT_JT || !sel.length) return;
            const d = new Date(sel[0]);
            d.setDate(d.getDate() + DEFAULT_JT);
            fpJatuhTempo.setDate(d);
        },
    });

    $('#selectFaskes').select2({
        dropdownParent: $('body'), placeholder: '-- Pilih Faskes KSO --', allowClear: true, width: '100%',
    }).on('select2:select select2:clear', function () {
        // Reset barang yang sedang dipilih di inline (karena list barang berubah per faskes)
        $('#inlineBarang').val(null).trigger('change');
        document.getElementById('inlineUkuran').textContent = '—';
        document.getElementById('inlineSatuan').textContent = '—';
        document.getElementById('inlineStokChip').className = 'chip-stok chip-stok-none';
        document.getElementById('inlineStokChip').textContent = '—';
        // Re-fetch stok tersedia untuk semua item karena gudang KSO berubah
        if (items.length) refetchAllStokAndHarga();
    });

    $('#inlineBarang').select2({
        dropdownParent: $('body'), placeholder: 'Ketik kode atau nama barang...', allowClear: false,
        minimumInputLength: 0, width: '100%', containerCssClass: 's2-barang',
        templateResult: (item) => {
            if (item.loading) return item.text;
            const merek = item.raw?.merek && item.raw.merek !== '-'
                ? `<span style="color:#aaa;font-size:.78rem"> — ${item.raw.merek}</span>` : '';
            return $(`<span>${item.text}${merek}</span>`);
        },
        templateSelection: (item) => item.text,
        ajax: {
            url: ROUTE_BARANG, dataType: 'json', delay: 300,
            data: p => ({ q: p.term ?? '', faskes_id: $('#selectFaskes').val() ?? '' }),
            processResults: data => ({ results: data.map(b => ({ id: b.id, text: b.nama, raw: b })) }),
            cache: false,
        },
    }).on('select2:select', function (e) {
        const b = e.params.data.raw;
        document.getElementById('inlineUkuran').textContent = b.ukuran || '—';
        document.getElementById('inlineSatuan').textContent = b.satuan || '—';
        fetchStokKso(b.id, function (data) {
            renderInlineStokChip(data.total, data.satuan, parseInt($('#inlineQty').val()) || 1);
        });
        fetchHarga(b.id, function (harga) {
            if (harga) {
                document.getElementById('inlineHarga').value = formatRp(harga);
                document.getElementById('inlineHargaWarn').classList.add('d-none');
            } else {
                document.getElementById('inlineHarga').value = '';
                document.getElementById('inlineHargaWarn').classList.toggle('d-none', !$('#selectFaskes').val());
            }
        });
        setTimeout(() => { $('#inlineQty').focus(); document.getElementById('inlineQty').select(); }, 50);
    }).on('select2:clear', function () {
        document.getElementById('inlineUkuran').textContent = '—';
        document.getElementById('inlineSatuan').textContent = '—';
        const c = document.getElementById('inlineStokChip');
        c.className = 'chip-stok chip-stok-none';
        c.textContent = '—';
    }).on('select2:open', function () {
        setTimeout(() => { const s = document.querySelector('.select2-container--open .select2-search__field'); if (s) s.focus(); }, 30);
    });

    $('#inlineQty').on('input', function () {
        const sel = $('#inlineBarang').select2('data')[0];
        if (!sel || !sel.id) return;
        const el = document.getElementById('inlineStokChip');
        renderInlineStokChip(parseInt(el.dataset.total ?? 0) || 0, el.dataset.satuan ?? '', parseInt(this.value) || 1);
    });

    $('#inlineHarga').on('input', function () {
        let v = $(this).val().replace(/\D/g, '');
        $(this).val(v ? parseInt(v, 10).toLocaleString('id-ID') : '');
    });

    $('#inlineQty').on('keydown',  e => { if (e.key === 'Enter') { e.preventDefault(); $('#inlineHarga').focus().select(); } });
    $('#inlineHarga').on('keydown', e => { if (e.key === 'Enter') { e.preventDefault(); tambahItem(); } });

    if (IS_EDIT && EXISTING_ITEMS.length) {
        items = EXISTING_ITEMS.map(i => ({ ...i }));
        const faskesId = $('#selectFaskes').val();
        items.forEach((item, idx) => {
            if (faskesId) {
                fetchStokKso(item.barang_id, function (data) {
                    items[idx].stok_total = data.total;
                    items[idx].stok_lots  = data.lots;
                    renderItems();
                });
            }
        });
    }
    renderItems();

    if (IS_EDIT && EXISTING_TOTAL !== null) {
        const subtotal  = items.reduce((s, i) => s + i.harga_jual * i.qty, 0);
        const autoTotal = subtotal + (subtotal * 11 / 12 * 0.12);
        if (Math.abs(EXISTING_TOTAL - autoTotal) > 0.01) {
            totalManual = true;
            document.getElementById('inputTotal').value = EXISTING_TOTAL.toLocaleString('id-ID', { maximumFractionDigits: 2 });
            document.getElementById('btnResetTotal').classList.remove('d-none');
        }
    }

    document.getElementById('btnResetFEFO').addEventListener('click', applyFEFO);
    document.getElementById('btnKonfirmasiLot').addEventListener('click', konfirmasiLot);
    $(document).on('input', '.lot-qty-input', updateLotTotal);
});

// ── Stok KSO ─────────────────────────────────────────────────────────────────
function fetchStokKso(barangId, cb) {
    const faskesId = $('#selectFaskes').val();
    if (!faskesId) { cb({ total: 0, satuan: '', lots: [] }); return; }
    $.get(ROUTE_STOK, { barang_id: barangId, faskes_id: faskesId }, cb);
}

function fetchHarga(barangId, cb) {
    const faskesId = $('#selectFaskes').val();
    if (!faskesId) { cb(null); return; }
    $.get(ROUTE_HARGA, { faskes_id: faskesId, barang_id: barangId }, d => cb(d.harga));
}

function renderInlineStokChip(total, satuan, qty) {
    const el = document.getElementById('inlineStokChip');
    el.dataset.total  = total;
    el.dataset.satuan = satuan;
    if (total === 0) {
        el.className   = 'chip-stok chip-stok-none'; el.textContent = 'Tdk ada stok';
    } else if (total < qty) {
        el.className   = 'chip-stok chip-stok-warn'; el.textContent = `Tersedia: ${total} ${satuan}`;
    } else {
        el.className   = 'chip-stok chip-stok-ok'; el.textContent = `Tersedia: ${total} ${satuan}`;
    }
}

function refetchAllStokAndHarga() {
    const faskesId = $('#selectFaskes').val();
    if (!faskesId) return;
    items.forEach((item, idx) => {
        fetchStokKso(item.barang_id, function (data) {
            items[idx].stok_total = data.total;
            items[idx].stok_lots  = data.lots;
            // Reset lot confirmation saat faskes berubah
            items[idx].lots = suggestiFEFO(data.lots, item.qty);
            items[idx].lot_confirmed = false;
            renderItems();
        });
        $.get(ROUTE_HARGA, { faskes_id: faskesId, barang_id: item.barang_id }, d => {
            if (d.harga) { items[idx].harga_jual = parseFloat(d.harga); renderItems(); }
        });
    });
}

// ── Tambah item ───────────────────────────────────────────────────────────────
function tambahItem() {
    const sel  = $('#inlineBarang').select2('data')[0];
    const qty  = parseInt(document.getElementById('inlineQty').value) || 0;
    const hRaw = document.getElementById('inlineHarga').value.replace(/\./g, '');
    const harga = parseFloat(hRaw) || 0;

    if (!sel || !sel.id) { toast('Pilih barang terlebih dahulu.'); return; }
    if (qty < 1)          { toast('Qty minimal 1.'); return; }
    if (harga <= 0)       { toast('Harga jual harus diisi.'); return; }
    if (!$('#selectFaskes').val()) { toast('Pilih Faskes KSO terlebih dahulu.'); return; }

    const b = sel.raw;
    if (!b) { toast('Data barang tidak lengkap, pilih ulang.'); return; }

    const stokEl = document.getElementById('inlineStokChip');
    const newItem = {
        barang_id : b.id, kode_barang: b.kode, nama_barang: b.nama,
        ukuran    : document.getElementById('inlineUkuran').textContent.replace('—',''),
        satuan    : b.satuan, qty, harga_jual: harga,
        stok_total: parseInt(stokEl.dataset.total ?? 0) || 0,
        stok_lots : [], lots: [], lot_confirmed: false,
    };
    items.push(newItem);
    const idx = items.length - 1;

    fetchStokKso(b.id, function (data) {
        items[idx].stok_total = data.total;
        items[idx].stok_lots  = data.lots;
        items[idx].lots = suggestiFEFO(data.lots, qty);
        renderItems();
    });

    $('#inlineBarang').val(null).trigger('change');
    document.getElementById('inlineUkuran').textContent = '—';
    document.getElementById('inlineSatuan').textContent = '—';
    document.getElementById('inlineQty').value   = 1;
    document.getElementById('inlineHarga').value = '';
    document.getElementById('inlineHargaWarn').classList.add('d-none');
    document.getElementById('inlineStokChip').className = 'chip-stok chip-stok-none';
    document.getElementById('inlineStokChip').textContent = '—';
    renderItems();
    setTimeout(() => $('#inlineBarang').select2('open'), 100);
}

function suggestiFEFO(lots, qtyTarget) {
    const result = [];
    let sisa = qtyTarget;
    for (const lot of lots) {
        if (sisa <= 0) break;
        const ambil = Math.min(lot.qty, sisa);
        if (ambil > 0) {
            result.push({ stok_id: lot.id, no_lot: lot.no_lot, tanggal_kedaluwarsa: lot.tanggal_kedaluwarsa,
                tanggal_kedaluwarsa_iso: lot.tanggal_kedaluwarsa_iso, qty_ambil: ambil, qty_tersedia: lot.qty });
            sisa -= ambil;
        }
    }
    return result;
}

// ── Render items ──────────────────────────────────────────────────────────────
function renderItems() {
    const tbody = document.getElementById('tbodyItems');
    if (!items.length) {
        tbody.innerHTML = '';
        document.getElementById('alertItemsEmpty').classList.remove('d-none');
        ['tdSubtotal','tdDpp','tdPpn'].forEach(id => document.getElementById(id).textContent = 'Rp 0');
        resetTotal();
        return;
    }
    document.getElementById('alertItemsEmpty').classList.add('d-none');
    tbody.innerHTML = items.map((item, idx) => {
        let stokChip = '';
        if (item.stok_total === null || item.stok_total === undefined) stokChip = `<span class="chip-stok chip-stok-none">—</span>`;
        else if (item.stok_total === 0) stokChip = `<span class="chip-stok chip-stok-warn">Tdk ada stok</span>`;
        else if (item.stok_total < item.qty) stokChip = `<span class="chip-stok chip-stok-warn">Tersedia: ${item.stok_total}</span>`;
        else stokChip = `<span class="chip-stok chip-stok-ok">Tersedia: ${item.stok_total}</span>`;

        const lotTotal = item.lots.reduce((s, l) => s + (l.qty_ambil || 0), 0);
        let lotChip = '';
        if (!item.stok_lots || !item.stok_lots.length) {
            lotChip = `<span class="chip-lot chip-lot-unset" style="font-size:.7rem">Tdk ada lot</span>`;
        } else if (item.lot_confirmed) {
            lotChip = `<button type="button" class="chip-lot chip-lot-confirmed" onclick="bukaModalLot(${idx})">✓ ${lotTotal} dikonfirmasi</button>`;
        } else {
            const label = item.lots.length ? `${lotTotal} (saran FEFO)` : 'Lihat lot';
            lotChip = `<button type="button" class="chip-lot chip-lot-unset" onclick="bukaModalLot(${idx})">📋 ${label}</button>`;
        }
        return `
        <tr>
            <td class="text-center">${idx + 1}</td>
            <td><div class="fw-semibold">${esc(item.nama_barang)}</div><div class="text-muted" style="font-size:.78rem">${esc(item.kode_barang)}</div></td>
            <td>${esc(item.ukuran || '—')}</td>
            <td class="text-center">${esc(item.satuan)}</td>
            <td class="text-center">
                <input type="number" class="form-control inline-ctrl text-center" min="1"
                       value="${item.qty}" onchange="updateQty(${idx}, this.value)" style="width:60px;margin:0 auto">
            </td>
            <td>
                <input type="text" class="form-control inline-ctrl inline-ctrl-right"
                       value="${formatRp(item.harga_jual)}" onchange="updateHarga(${idx}, this.value)" style="width:115px">
            </td>
            <td class="text-end pe-2 fw-semibold">${formatRpStr(item.harga_jual * item.qty)}</td>
            <td class="text-center">
                <div class="d-flex flex-column align-items-center gap-1">${stokChip}${lotChip}</div>
            </td>
            <td class="text-center">
                <button type="button" class="btn btn-danger btn-sm px-2" onclick="hapusItem(${idx})"><i class="bx bx-trash"></i></button>
            </td>
        </tr>`;
    }).join('');
    updateTotal();
}

function updateQty(idx, val) {
    items[idx].qty = Math.max(1, parseInt(val) || 1);
    if (items[idx].stok_lots?.length) {
        items[idx].lots = suggestiFEFO(items[idx].stok_lots, items[idx].qty);
        items[idx].lot_confirmed = false;
    }
    renderItems();
}
function updateHarga(idx, val) { items[idx].harga_jual = parseFloat(val.replace(/\./g,'').replace(',','.')) || 0; renderItems(); }
function hapusItem(idx) { items.splice(idx, 1); renderItems(); }

// ── Modal Lot ─────────────────────────────────────────────────────────────────
function bukaModalLot(idx) {
    modalIdx = idx;
    const item = items[idx];
    document.getElementById('modalLotTitle').textContent    = item.nama_barang;
    document.getElementById('modalLotSubtitle').textContent =
        `Stok KSO tersedia: ${item.stok_total ?? '?'} ${item.satuan} | Diminta: ${item.qty} ${item.satuan}`;
    document.getElementById('lotQtyTarget').textContent = item.qty;

    if (!item.stok_lots || !item.stok_lots.length) {
        fetchStokKso(item.barang_id, function (data) {
            items[idx].stok_total = data.total; items[idx].stok_lots = data.lots;
            modalLots = data.lots; renderModalLots(items[idx].lots);
        });
    } else {
        modalLots = item.stok_lots; renderModalLots(item.lots);
    }
    bootstrap.Modal.getOrCreateInstance(document.getElementById('modalLot')).show();
}

function renderModalLots(currentLots) {
    const tbody = document.getElementById('tbodyModalLots');
    const lotMap = {};
    (currentLots || []).forEach(l => { if (l.stok_id) lotMap[l.stok_id] = l.qty_ambil || 0; });
    if (!modalLots.length) {
        tbody.innerHTML = '<tr><td colspan="4" class="text-center text-muted py-3">Tidak ada stok KSO tersedia.</td></tr>';
        updateLotTotal(); return;
    }
    tbody.innerHTML = modalLots.map(lot => {
        const ambil = lotMap[lot.id] || 0;
        return `
        <tr>
            <td>${lot.no_lot || '<span class="text-muted fst-italic">—</span>'}</td>
            <td>${lot.tanggal_kedaluwarsa || '<span class="text-muted">—</span>'}</td>
            <td class="text-center fw-semibold">${lot.qty} <small class="text-muted">${lot.satuan}</small></td>
            <td class="text-center">
                <input type="number" class="form-control lot-qty-input"
                       min="0" max="${lot.qty}" value="${ambil}"
                       data-stok-id="${lot.id}" data-no-lot="${lot.no_lot ?? ''}"
                       data-ed="${lot.tanggal_kedaluwarsa ?? ''}" data-ed-iso="${lot.tanggal_kedaluwarsa_iso ?? ''}"
                       data-tersedia="${lot.qty}">
            </td>
        </tr>`;
    }).join('');
    updateLotTotal();
}

function updateLotTotal() {
    const target = items[modalIdx]?.qty ?? 0;
    let total = 0;
    document.querySelectorAll('.lot-qty-input').forEach(inp => {
        const max = parseInt(inp.dataset.tersedia) || 0;
        if ((parseInt(inp.value)||0) > max) inp.value = max;
        total += parseInt(inp.value) || 0;
    });
    document.getElementById('lotTotalAmbil').textContent = total;
    document.getElementById('lotQtyTarget').textContent  = target;
    const ok = total === target;
    document.getElementById('lotStatusOk').classList.toggle('d-none', !ok);
    document.getElementById('lotStatusKurang').classList.toggle('d-none', total >= target);
    document.getElementById('lotStatusLebih').classList.toggle('d-none', total <= target);
    document.getElementById('btnKonfirmasiLot').disabled = !ok;
}

function applyFEFO() {
    let sisa = items[modalIdx]?.qty ?? 0;
    document.querySelectorAll('.lot-qty-input').forEach(inp => {
        const t = parseInt(inp.dataset.tersedia) || 0;
        const a = Math.min(t, sisa);
        inp.value = a; sisa -= a;
    });
    updateLotTotal();
}

function konfirmasiLot() {
    const lots = [];
    document.querySelectorAll('.lot-qty-input').forEach(inp => {
        const a = parseInt(inp.value) || 0;
        if (a > 0) lots.push({ stok_id: parseInt(inp.dataset.stokId), no_lot: inp.dataset.noLot || null,
            tanggal_kedaluwarsa: inp.dataset.ed || null, tanggal_kedaluwarsa_iso: inp.dataset.edIso || null,
            qty_ambil: a, qty_tersedia: parseInt(inp.dataset.tersedia) || 0 });
    });
    items[modalIdx].lots = lots; items[modalIdx].lot_confirmed = true;
    bootstrap.Modal.getInstance(document.getElementById('modalLot')).hide();
    renderItems();
}

// ── Total ─────────────────────────────────────────────────────────────────────
function fmtRp(n)    { return 'Rp ' + n.toLocaleString('id-ID', { maximumFractionDigits:2 }); }
function formatRp(n)    { return Math.round(n).toLocaleString('id-ID'); }
function formatRpStr(n) { return 'Rp ' + Math.round(n).toLocaleString('id-ID'); }

function updateTotal() {
    const subtotal = items.reduce((s, i) => s + i.harga_jual * i.qty, 0);
    const dpp = subtotal * 11 / 12;
    const ppn = dpp * 0.12;
    const auto = subtotal + ppn;
    document.getElementById('tdSubtotal').textContent = fmtRp(subtotal);
    document.getElementById('tdDpp').textContent      = fmtRp(dpp);
    document.getElementById('tdPpn').textContent      = fmtRp(ppn);
    if (!totalManual) document.getElementById('inputTotal').value = auto.toLocaleString('id-ID', { maximumFractionDigits: 2 });
}
function onTotalInput(val) {
    totalManual = val.replace(/\./g,'').replace(',','') !== '';
    document.getElementById('btnResetTotal').classList.toggle('d-none', !totalManual);
}
function onTotalBlur(val) {
    const raw = parseFloat(val.replace(/\./g,'').replace(',','.'));
    if (!isNaN(raw)) document.getElementById('inputTotal').value = raw.toLocaleString('id-ID', { maximumFractionDigits: 2 });
}
function resetTotal() { totalManual = false; document.getElementById('btnResetTotal').classList.add('d-none'); updateTotal(); }
function getTotalValue() { return parseFloat(document.getElementById('inputTotal').value.replace(/\./g,'').replace(',','.')) || 0; }

// ── Submit ────────────────────────────────────────────────────────────────────
function submitForm() {
    document.querySelectorAll('[id^="err_"]').forEach(el => el.textContent = '');
    const faskesId   = $('#selectFaskes').val();
    const namaPasien = document.getElementById('inputNamaPasien').value.trim();
    const tglPemakaian = document.getElementById('tglPemakaian').value;
    const errors = {};
    if (!faskesId)     errors.faskes_id   = 'Faskes wajib dipilih.';
    if (!namaPasien)   errors.nama_pasien = 'Nama pasien wajib diisi.';
    if (!tglPemakaian) errors.tgl_pemakaian = 'Tgl. pemakaian wajib diisi.';
    if (Object.keys(errors).length) {
        for (const [k, msg] of Object.entries(errors)) { const el = document.getElementById('err_' + k); if (el) el.textContent = msg; }
        return;
    }
    if (!items.length) { Swal.fire('Peringatan', 'Belum ada barang yang ditambahkan.', 'warning'); return; }

    Swal.fire({
        title: IS_EDIT ? 'Simpan perubahan?' : 'Simpan penjualan KSO?',
        icon: 'question', showCancelButton: true,
        confirmButtonColor: '#7c3aed', cancelButtonColor: '#6c757d',
        confirmButtonText: 'Ya, simpan', cancelButtonText: 'Batal',
    }).then(res => {
        if (!res.isConfirmed) return;
        const payload = {
            _token              : CSRF,
            faskes_id           : faskesId,
            nama_pasien         : namaPasien,
            no_transaksi        : document.getElementById('inputNoTransaksi').value || null,
            tgl_pemakaian       : dmy2iso(tglPemakaian),
            nomor_po            : document.getElementById('inputNomorPo').value || null,
            tanggal_penjualan   : dmy2iso(document.getElementById('tanggalPenjualan').value),
            tanggal_jatuh_tempo : dmy2iso(document.getElementById('tanggalJatuhTempo').value),
            catatan             : document.getElementById('inputCatatan').value,
            total_harga         : getTotalValue(),
            items: items.map(i => ({ barang_id: i.barang_id, qty: i.qty, harga_jual: i.harga_jual, lots: i.lots || [] })),
        };
        if (IS_EDIT) payload._method = 'PUT';

        $.ajax({
            url: IS_EDIT ? ROUTE_UPDATE : ROUTE_STORE, method: 'POST',
            contentType: 'application/json', data: JSON.stringify(payload),
            success: r => {
                if (r.success) Swal.fire({ icon:'success', title:'Berhasil', text:'Disimpan.', timer:1800, showConfirmButton:false })
                    .then(() => window.location.href = r.redirect ?? BASE_URL + '/penjualan-kso');
            },
            error: xhr => {
                const errs = xhr.responseJSON?.errors ?? {};
                for (const [k, msgs] of Object.entries(errs)) {
                    const el = document.getElementById('err_' + k.replace(/\./g,'_'));
                    if (el) el.textContent = msgs[0];
                }
                Swal.fire('Validasi Gagal', xhr.responseJSON?.message ?? 'Periksa kembali isian.', 'error');
            },
        });
    });
}

function esc(s) { if (s == null) return '—'; return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;'); }
function dmy2iso(s) { if (!s) return ''; const [d,m,y] = s.split('-'); return `${y}-${m}-${d}`; }
function toast(msg) { Swal.fire({ icon:'warning', title:'Perhatian', text:msg, timer:2000, showConfirmButton:false }); }
</script>
@endsection