@extends('layouts.app')

@section('title', 'Credit Notes')

@section('content')
<div id="salesCreditNoteModule">
  <div class="card mb-3" id="creditNotesTableCard">
    <div class="card-header py-2">
      <div class="row flex-between-center g-0">
        <div class="col-4 col-sm-auto d-flex align-items-center pe-0">
          <h6 class="mb-0">Credit Note</h6>
        </div>
        <div class="col-8 col-sm-auto text-end ps-2">
          <div id="table-credit-notes-replace-element">
            <button class="btn btn-falcon-default btn-sm" type="button" data-bs-toggle="collapse" data-bs-target="#creditNotesFilters">
              <span class="fas fa-filter" data-fa-transform="shrink-3 down-2"></span>
              <span class="d-none d-sm-inline-block ms-1">Filter</span>
            </button>
            @if(!empty($caps['create']))
            <button class="btn btn-primary btn-sm ms-2" type="button" id="newCreditNoteBtn">
              <span class="fas fa-plus" data-fa-transform="shrink-3 down-2"></span>
              <span class="d-none d-sm-inline-block ms-1">New</span>
            </button>
            @endif
          </div>
        </div>
      </div>
    </div>

    <div class="collapse" id="creditNotesFilters">
      <div class="card-body border-top fs-10">
        <form id="creditNotesFilterForm" class="row gy-2 gx-2 align-items-end">
          <div class="col-auto">
            <select id="filter_cn_customer" class="form-select form-select-sm" name="customer_id">
              <option value="">All Customers</option>
            </select>
          </div>
          <div class="col-auto">
            <select id="filter_cn_status" class="form-select form-select-sm" name="status">
              <option value="">Any Status</option>
              <option value="POSTED">Posted</option>
              <option value="CANCELLED">Cancelled</option>
            </select>
          </div>
          <div class="col-auto">
            <input id="filter_cn_search" type="text" class="form-control form-control-sm" placeholder="CN Number" name="search">
          </div>
          <div class="col-auto">
            <input type="date" id="filter_cn_date_from" class="form-control form-control-sm" name="date_from" placeholder="Date From">
          </div>
          <div class="col-auto">
            <input type="date" id="filter_cn_date_to" class="form-control form-control-sm" name="date_to" placeholder="Date To">
          </div>
          <div class="col-auto d-flex align-items-center">
            <button class="btn btn-primary btn-sm me-2" type="button" id="applyCreditNotesFilters"><i class="fas fa-search"></i> Apply</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" id="clearCreditNotesFilters"><i class="fas fa-times"></i> Clear</button>
          </div>
        </form>
      </div>
    </div>

    <div class="card-body p-0">
      <div class="table-responsive scrollbar js-vh-table">
        <table class="table table-sm fs-10 mb-0 overflow-hidden" id="creditNotesTable">
          <thead class="bg-200">
            <tr>
              <th class="text-900 align-middle">CN No</th>
              <th class="text-900 align-middle">Date</th>
              <th class="text-900 align-middle">Customer</th>
              <th class="text-900 align-middle">SI No</th>
              <th class="text-900 align-middle">Type</th>
              <th class="text-900 align-middle">Return Receipt No</th>
              <th class="text-900 align-middle text-end">Total</th>
              <th class="text-900 align-middle">Status</th>
            </tr>
          </thead>
          <tbody id="creditNotesTbody">
            <tr>
              <td colspan="8" class="text-center py-4 text-muted">Loading...</td>
            </tr>
          </tbody>
        </table>
      </div>
    </div>
  </div>

  <!-- Offcanvas Form (match Debit Note UI pattern) -->
  <div class="offcanvas offcanvas-end d-flex flex-column so-order-offcanvas" tabindex="-1" id="creditNoteFormOffcanvas"
    aria-labelledby="creditNoteFormOffcanvasLabel" data-bs-backdrop="static" data-bs-keyboard="false" style="width: 95vw !important; max-width: 1800px; height: 100vh;">
    <div class="offcanvas-header offcanvas-header-polished border-bottom py-2">
      <div class="d-flex align-items-center gap-2">
        <h6 class="offcanvas-title mb-0" id="creditNoteFormOffcanvasLabel">Sales Credit Note</h6>
        @if(!empty($caps['create']))
        <button type="button" class="btn btn-falcon-default btn-sm d-none" id="btnSwitchCreditNoteType">
          <i class="fas fa-exchange-alt me-1"></i>Switch
        </button>
        @endif
      </div>
      <button class="btn-close text-reset" type="button" data-bs-dismiss="offcanvas" aria-label="Close"></button>
    </div>

    <div class="offcanvas-body p-0 d-flex flex-column flex-grow-1 so-offcanvas-body" style="min-height: 0; overflow: hidden;">
      <div class="form-standard tight d-flex flex-column flex-grow-1" style="min-height: 0;">
        <div class="card border-0 shadow-sm d-flex flex-column flex-grow-1" style="min-height: 0;">
          <div class="card-body py-2 d-flex flex-column flex-grow-1" style="font-size: 0.8125rem; overflow: hidden; min-height: 0;">
            <div class="row g-3 flex-grow-1" style="overflow: hidden; min-height: 0;">
              <!-- LEFT COLUMN -->
              <div class="col-lg-8 col-xl-9 d-flex flex-column so-left-col" style="overflow: hidden; min-height: 0;">
                <form id="creditNoteForm" class="needs-validation d-flex flex-column h-100" novalidate style="overflow: hidden; min-height: 0;">
                  <div class="flex-shrink-0">

                    <div class="card border-0 mb-2" id="createFromSalesReturnReceiptCard" style="display:none;">
                      <div class="card-body p-0">
                        <div class="border rounded p-2">
                          <div class="row g-2">
                            <div class="col-md-6">
                              <label class="form-label" for="cn_customer_id">Customer</label>
                              <select id="cn_customer_id" class="form-select form-select-sm" @if(empty($caps['create'])) disabled @endif>
                                <option value="">Select Customer</option>
                              </select>
                            </div>
                            <div class="col-md-6">
                              <label class="form-label" for="cn_sales_invoice_id">Posted Sales Invoice</label><span class="fs-10 text-muted mt-1"> (Only POSTED invoices.)</span>
                              <select id="cn_sales_invoice_id" class="form-select form-select-sm" @if(empty($caps['create'])) disabled @endif data-placeholder="Type to search SI..."></select>
                            </div>
                          </div>
                          <div class="row g-2 align-items-end mt-1">
                            <div class="col-md-6">
                              <label class="form-label" for="cn_stock_receipt_header_id">Return Receipt</label>
                              <select id="cn_stock_receipt_header_id" class="form-select form-select-sm" @if(empty($caps['create'])) disabled @endif data-placeholder="Type to search Return Receipt..."></select>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted mb-1">Selected</div>
                              <div id="cnSelectedReturnReceiptTag"></div>
                            </div>
                          </div>
                        </div>

                        <div class="mt-2" id="salesReturnPreview" style="display:none;">
                          <div class="row g-2">
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">Return Receipt No</div>
                              <div class="fw-semibold" id="sr_receipt_no">-</div>
                            </div>
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">Receipt Date</div>
                              <div class="fw-semibold" id="sr_receipt_date">-</div>
                            </div>
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">Receipt Status</div>
                              <div class="fw-semibold" id="sr_receipt_status">-</div>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted">SI No</div>
                              <div class="fw-semibold" id="sr_si_no">-</div>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted">Tax Type</div>
                              <div class="fw-semibold" id="sr_tax_type">-</div>
                            </div>
                          </div>

                          <div class="table-responsive scrollbar mt-2 border rounded">
                            <table class="table table-sm fs-10 mb-0">
                              <thead class="bg-200">
                                <tr>
                                  <th>Variant</th>
                                  <th class="text-end">Qty</th>
                                  <th>UOM</th>
                                  <th class="text-end">Rate</th>
                                  <th class="text-end">Tax %</th>
                                  <th class="text-end">Amount</th>
                                </tr>
                              </thead>
                              <tbody id="sr_lines_tbody">
                                <tr><td colspan="6" class="text-center text-muted py-3">Select Return Receipt to preview lines</td></tr>
                              </tbody>
                            </table>
                          </div>
                        </div>
                      </div>
                    </div>

                    <div class="card mb-3" id="createCorrectionCreditNoteCard" style="display:none;">
                      <div class="card-body p-0">
                        <div class="border rounded p-2">
                          <div class="row g-2">
                            <div class="col-md-6">
                              <label class="form-label" for="cn_cor_customer_id">Customer</label>
                              <select id="cn_cor_customer_id" class="form-select form-select-sm" @if(empty($caps['create'])) disabled @endif>
                                <option value="">Select Customer</option>
                              </select>
                            </div>
                            <div class="col-md-6">
                              <label class="form-label" for="cn_cor_sales_invoice_id">Posted Sales Invoice</label><span class="fs-10 text-muted mt-1"> (Only POSTED invoices.)</span>
                              <select id="cn_cor_sales_invoice_id" class="form-select form-select-sm" @if(empty($caps['create'])) disabled @endif data-placeholder="Type to search SI..."></select>
                            </div>
                          </div>

                          <div class="row g-2 align-items-end mt-1">
                            <div class="col-md-6">
                              <div class="fs-10 text-muted mb-1">Selected</div>
                              <div id="cnSelectedCorrectionSiTag"></div>
                            </div>
                            <div class="col-md-6 text-end">
                              <div class="fs-10 text-muted">Correction = financial adjustment (no stock movement)</div>
                            </div>
                          </div>
                        </div>

                        <div class="mt-2" id="correctionCreditPreview" style="display:none;">
                          <div class="row g-2">
                            <div class="col-md-6">
                              <div class="fs-10 text-muted">SI No</div>
                              <div class="fw-semibold" id="cor_si_no">-</div>
                            </div>
                            <div class="col-md-3">
                              <div class="fs-10 text-muted">SI Date</div>
                              <div class="fw-semibold" id="cor_si_date">-</div>
                            </div>
                            <div class="col-md-3">
                              <div class="fs-10 text-muted">Tax Type</div>
                              <div class="fw-semibold" id="cor_si_tax_type">-</div>
                            </div>
                          </div>

                          <div class="table-responsive scrollbar mt-2 border rounded" style="max-height: 240px; overflow:auto;">
                            <table class="table table-sm fs-10 mb-0 align-middle">
                              <thead class="bg-200" style="position: sticky; top: 0; z-index: 5;">
                                <tr>
                                  <th style="width: 28px;"></th>
                                  <th>Variant</th>
                                  <th class="text-end">SI Qty</th>
                                  <th class="text-end">SI Rate</th>
                                  <th class="text-end">Correct Qty</th>
                                  <th class="text-end">Correct Rate</th>
                                  <th class="text-end">Delta</th>
                                  <th class="text-end">Tax %</th>
                                </tr>
                              </thead>
                              <tbody id="correction_cn_lines_tbody">
                                <tr><td colspan="8" class="text-center text-muted py-3">Select Posted Sales Invoice to load lines</td></tr>
                              </tbody>
                            </table>
                          </div>

                          <div class="fs-10 text-muted mt-2">
                            Tip: Enter corrected qty/rate (must be less than or equal to SI). Credit Note will be created for the difference.
                          </div>
                        </div>
                      </div>
                    </div>

                    @if(empty($caps['create']))
                    <div class="alert alert-info">You do not have permission to create credit notes.</div>
                    @endif
                  </div>

                  <div class="flex-grow-1 d-flex flex-column" style="min-height: 0; flex: 1 1 0;">
                    <label class="form-label mb-2">Preview</label>
                    <div class="table-responsive border rounded position-relative flex-grow-1" style="overflow: auto; overflow-x: hidden; min-height: 120px; flex: 1 1 0;">
                      <table class="table table-sm mb-0 align-middle" style="table-layout: fixed;">
                        <thead class="bg-100 text-900" style="position: sticky; top: 0; z-index: 5;">
                          <tr class="text-nowrap">
                            <th style="width:40%">Variant</th>
                            <th style="width:12%" class="text-end">Qty</th>
                            <th style="width:10%">UOM</th>
                            <th style="width:12%" class="text-end">Rate</th>
                            <th style="width:10%" class="text-end">Tax %</th>
                            <th style="width:16%" class="text-end">Amount</th>
                          </tr>
                        </thead>
                        <tbody id="cnPreviewLinesBody">
                          <tr><td colspan="6" class="text-center text-muted py-3">Select a source to preview</td></tr>
                        </tbody>
                      </table>
                    </div>
                  </div>
                </form>
              </div>
              <!-- END LEFT COLUMN -->

              <!-- RIGHT COLUMN: Summary -->
              <div class="col-lg-4 col-xl-3 so-right-col">
                <div class="sticky-top" style="top: 1rem;">
                  <div class="mb-3">
                    <div class="accordion accordion-flush border rounded">
                      <div class="accordion-item border-0">
                        <h2 class="accordion-header">
                          <div class="accordion-button py-2 pe-none" style="cursor: default; background-color: var(--bs-accordion-btn-bg);">
                            <i class="fas fa-calculator me-2"></i>
                            <span class="fw-semibold fs-10">Credit Note Summary</span>
                          </div>
                        </h2>
                        <div class="accordion-body p-2">
                          <div class="d-flex justify-content-between mb-1">
                            <span class="text-muted fs-10">Subtotal:</span>
                            <strong class="fs-10" id="cn_display_subtotal">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="cn_cgst_row" style="display: none;">
                            <span class="text-muted fs-10">CGST:</span>
                            <strong class="text-success fs-10" id="cn_display_cgst">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="cn_sgst_row" style="display: none;">
                            <span class="text-muted fs-10">SGST:</span>
                            <strong class="text-success fs-10" id="cn_display_sgst">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="cn_igst_row" style="display: none;">
                            <span class="text-muted fs-10">IGST:</span>
                            <strong class="text-info fs-10" id="cn_display_igst">₹0.00</strong>
                          </div>
                          <hr class="my-1">
                          <div class="d-flex justify-content-between align-items-center">
                            <strong class="fs-9">Grand Total:</strong>
                            <strong class="text-primary fs-6" id="cn_display_grand_total">₹0.00</strong>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>

                  <div class="accordion accordion-flush border rounded" id="cnAdditionalInfoAccordion">
                    <div class="accordion-item">
                      <h2 class="accordion-header" id="cnAdditionalInfoHeading">
                        <button class="accordion-button py-2" type="button" data-bs-toggle="collapse"
                          data-bs-target="#cnAdditionalInfoCollapse" aria-expanded="true" aria-controls="cnAdditionalInfoCollapse">
                          <i class="fas fa-info-circle me-2"></i>
                          <span class="fw-semibold fs-10">Additional Info</span>
                        </button>
                      </h2>
                      <div id="cnAdditionalInfoCollapse" class="accordion-collapse collapse show" aria-labelledby="cnAdditionalInfoHeading" data-bs-parent="#cnAdditionalInfoAccordion">
                        <div class="accordion-body p-2">
                          <div>
                            <label class="form-label fw-semibold fs-10" for="cn_remarks">
                              <i class="fas fa-sticky-note me-1"></i>Remarks
                            </label>
                            <textarea class="form-control form-control-sm" id="cn_remarks" rows="4" placeholder="-"></textarea>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
              <!-- END RIGHT COLUMN -->
            </div>
          </div>
        </div>
      </div>

      <!-- Sticky Footer (match Debit Note pattern) -->
      <div class="border-top px-3 py-2 bg-body-tertiary d-flex justify-content-between align-items-center mt-auto sticky-bottom-footer">
        <button type="button" class="btn btn-sm btn-light" data-bs-dismiss="offcanvas">
          <i class="fas fa-times me-1"></i>Close
        </button>
        <div>
          @if(!empty($caps['create']))
          <button type="button" class="btn btn-sm btn-primary d-none" id="btnCreateCreditNote" disabled>
            <i class="fas fa-check me-1"></i>Create Credit Note
          </button>
          <button type="button" class="btn btn-sm btn-primary d-none" id="btnCreateCreditNoteCorrection" disabled>
            <i class="fas fa-check me-1"></i>Create Credit Note
          </button>
          @endif
        </div>
      </div>
    </div>
  </div>
</div>
@endsection

@push('scripts')
<link rel="stylesheet" href="{{ asset('assets/css/forms-standard.css') }}">
<script src="{{ asset('assets/js/custom/sales/sales-credit-notes.js') }}"></script>
@endpush

@push('styles')
<style>
  .so-order-offcanvas { height: 100vh; }
  .so-order-offcanvas .so-offcanvas-body { min-height: 0; overflow: hidden; }
  @media (max-width: 991.98px) {
    .so-order-offcanvas { width: 100vw !important; max-width: 100vw !important; }
  }
</style>
@endpush