@extends('layouts.app')

@section('title', 'Sales Invoices')

@section('content')
<div id="salesInvoiceModule">
  <div class="card mb-3" id="invoicesTableCard">
    <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">Sales Invoices</h6>
        </div>
        <div class="col-8 col-sm-auto text-end ps-2">
          <div id="table-invoices-replace-element">
            <button class="btn btn-falcon-default btn-sm" type="button" data-bs-toggle="collapse" data-bs-target="#invoicesFilters">
              <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>
            <button class="btn btn-primary btn-sm ms-2" type="button" id="newInvoiceBtn">
              <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>
          </div>
        </div>
      </div>
    </div>

    <div class="collapse" id="invoicesFilters">
      <div class="card-body border-top fs-10">
        <form id="invoicesFilterForm" class="row gy-2 gx-2 align-items-end">
          <div class="col-auto">
            <select id="filter_company" class="form-select form-select-sm" name="company_id">
              <option value="">All Companies</option>
            </select>
          </div>
          <div class="col-auto">
            <select id="filter_customer" class="form-select form-select-sm" name="customer_id">
              <option value="">All Customers</option>
            </select>
          </div>
          <div class="col-auto">
            <select id="filter_status" class="form-select form-select-sm" name="status">
              <option value="">Any Status</option>
              <option value="DRAFT">Draft</option>
              <option value="POSTED">Posted</option>
              <option value="CANCELLED">Cancelled</option>
            </select>
          </div>
          <div class="col-auto">
            <input id="filter_search" type="text" class="form-control form-control-sm" placeholder="Invoice Number" name="search">
          </div>
          <div class="col-auto">
            <input type="date" id="filter_date_from" class="form-control form-control-sm" name="date_from" placeholder="Date From">
          </div>
          <div class="col-auto">
            <input type="date" id="filter_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="applyInvoicesFilters"><i class="fas fa-search"></i> Apply</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" id="clearInvoicesFilters"><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="invoicesTable">
          <thead class="bg-200">
            <tr>
              <th class="text-900 sort align-middle" data-sort="invoice_number">Invoice No</th>
              <th class="text-900 sort align-middle" data-sort="invoice_date">Date</th>
              <th class="text-900 sort align-middle" data-sort="customer">Customer</th>
              <th class="text-900 sort align-middle" data-sort="tax_type">Tax Type</th>
              <th class="text-900 sort align-middle" data-sort="total_amount">Total</th>
              <th class="text-900 sort align-middle" data-sort="status">Status</th>
              <th class="text-900 align-middle text-end">Actions</th>
            </tr>
          </thead>
          <tbody class="list" id="invoicesTbody">
            <tr>
              <td colspan="7" class="text-center py-4 text-muted">Loading...</td>
            </tr>
          </tbody>
        </table>
      </div>
    </div>
  </div>

  <!-- Offcanvas Form (match Sales Order + Purchase Order UI) -->
  <div class="offcanvas offcanvas-end d-flex flex-column so-order-offcanvas" tabindex="-1" id="invoiceFormOffcanvas"
    aria-labelledby="invoiceFormOffcanvasLabel" 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">
      <h6 class="offcanvas-title mb-0" id="invoiceFormOffcanvasLabel">Sales Invoice</h6>
      <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;">


            <!-- 2 Column Layout: Form on Left | Summary on Right -->
            <div class="row g-3 flex-grow-1" style="overflow: hidden; min-height: 0;">
              <!-- LEFT COLUMN: Form Fields -->
              <div class="col-lg-8 col-xl-9 d-flex flex-column so-left-col" style="overflow: hidden; min-height: 0;">
                <form id="invoiceForm" class="needs-validation d-flex flex-column h-100" novalidate style="overflow: hidden; min-height: 0;">
                  <input type="hidden" id="invoice_id" name="id">

                  <!-- Scrollable form fields container -->
                  <div class="flex-shrink-0">
                    <!-- Phase 2: Create from Stock Issue (DN) -->
                    <div class="card mb-3" id="createFromStockIssueCard" style="display:none;">
                      <div class="card-header py-2">
                        <h6 class="mb-0">Create From Stock Issue (DN)</h6>
                      </div>
                      <div class="card-body">
                        <div class="border rounded p-2">
                          <div class="row g-2 align-items-end">
                            <div class="col-md-6">
                              <label class="form-label" for="si_stock_issue_ids">Stock Issue No</label>
                              <select class="form-select form-select-sm" id="si_stock_issue_ids" multiple="multiple" data-placeholder="Type to search DN No..."></select>
                              <div class="fs-10 text-muted mt-1">Select one or more Delivery Notes (DN). Details load automatically.</div>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted mb-1">Selected</div>
                              <div id="selectedStockIssuesTags"></div>
                            </div>
                          </div>
                        </div>

                        <div class="mt-3" id="stockIssuePreview" style="display:none;">
                          <div class="row g-2">
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">DN No</div>
                              <div class="fw-semibold" id="si_dn_no">-</div>
                            </div>
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">DN Date</div>
                              <div class="fw-semibold" id="si_dn_date">-</div>
                            </div>
                            <div class="col-md-4">
                              <div class="fs-10 text-muted">DN Status</div>
                              <div class="fw-semibold" id="si_dn_status">-</div>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted">SO No</div>
                              <div class="fw-semibold" id="si_so_no">-</div>
                            </div>
                            <div class="col-md-6">
                              <div class="fs-10 text-muted">Customer</div>
                              <div class="fw-semibold" id="si_customer">-</div>
                            </div>
                          </div>

                          <div class="table-responsive scrollbar mt-3 border rounded">
                            <table class="table table-sm fs-10 mb-0">
                              <thead class="bg-200">
                                <tr>
                                  <th>DN</th>
                                  <th>Variant</th>
                                  <th class="text-end">Issued</th>
                                  <th class="text-end">Already Invoiced</th>
                                  <th class="text-end">Remaining</th>
                                </tr>
                              </thead>
                              <tbody id="si_lines_tbody">
                                <tr><td colspan="5" class="text-center text-muted py-3">Select Stock Issue(s) to preview lines</td></tr>
                              </tbody>
                            </table>
                          </div>
                        </div>
                      </div>
                    </div>

                    <!-- Invoice Details (match SO/PO field spacing) -->
                    <div class="row g-2 mb-2">
                      <div class="col-md-4">
                        <label class="form-label" for="inv_invoice_number">Invoice No</label>
                        <input type="text" class="form-control form-control-sm" id="inv_invoice_number" readonly>
                      </div>
                      <div class="col-md-4">
                        <label class="form-label" for="inv_invoice_date">Invoice Date</label>
                        <input type="date" class="form-control form-control-sm" id="inv_invoice_date" readonly>
                      </div>
                      <div class="col-md-4">
                        <label class="form-label" for="inv_status">Status</label>
                        <input type="text" class="form-control form-control-sm" id="inv_status" readonly>
                      </div>
                    </div>

                    <div class="row g-2 mb-2">
                      <div class="col-md-6">
                        <label class="form-label" for="inv_customer">Customer</label>
                        <input type="text" class="form-control form-control-sm" id="inv_customer" readonly>
                      </div>
                      <div class="col-md-6">
                        <label class="form-label" for="inv_tax_type">Tax Type</label>
                        <input type="text" class="form-control form-control-sm" id="inv_tax_type" readonly>
                      </div>
                    </div>
                  </div>
                  <!-- End scrollable form fields -->

                  <!-- Line Items Section - Flex grow to fill space -->
                  <div class="flex-grow-1 d-flex flex-column" style="min-height: 0; flex: 1 1 0;">
                    <div class="d-flex justify-content-between align-items-center mb-2">
                      <label class="form-label mb-0 required">Line Items</label>
                      <button type="button" class="btn btn-sm btn-falcon-primary d-none" id="addLineBtn" style="margin-right: 5px;">
                        <i class="fas fa-plus me-1"></i>Add Line
                      </button>
                    </div>

                    <!-- Lines Table with Loading Overlay (same markup as SO/PO) -->
                    <div class="table-responsive border rounded position-relative flex-grow-1 so-lines-table" style="overflow: auto; overflow-x: hidden; min-height: 0; flex: 1 1 0;"
                      id="linesTableContainer">
                      <div class="position-absolute top-0 start-0 w-100 h-100 bg-white bg-opacity-75 d-none align-items-center justify-content-center"
                        style="z-index: 10; backdrop-filter: blur(2px);" id="linesLoadingOverlay">
                        <div class="text-center">
                          <div class="spinner-border text-primary mb-2" role="status">
                            <span class="visually-hidden">Loading...</span>
                          </div>
                          <div class="fs-10 text-muted">
                            Loading line items... <span id="overlayLoadedCount">0</span>/<span id="overlayTotalCount">0</span>
                            (<span id="overlayProgressPercent">0</span>%)
                          </div>
                          <div class="progress mt-2" style="height: 4px; width: 200px;">
                            <div class="progress-bar" role="progressbar" id="overlayProgressBar" style="width: 0%"></div>
                          </div>
                        </div>
                      </div>

                      <table class="table table-sm mb-0 align-middle" id="linesTable" 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:28%"><i class="fas fa-box-open me-1"></i>Variant</th>
                            <th style="width:10%"><i class="fas fa-cube me-1"></i>Qty</th>
                            <th style="width:9%"><i class="fas fa-balance-scale me-1"></i>UOM</th>
                            <th style="width:10%"><i class="fas fa-tag me-1"></i>Rate</th>
                            <th style="width:11%"><i class="fas fa-calculator me-1"></i>Base Rate</th>
                            <th style="width:8%"><i class="fas fa-barcode me-1"></i>HSN</th>
                            <th style="width:8%"><i class="fas fa-percent me-1"></i>Tax %</th>
                            <th style="width:10%"><i class="fas fa-rupee-sign me-1"></i>Amount</th>
                            <th style="width:48px" class="text-center"><i class="fas fa-cog"></i></th>
                          </tr>
                        </thead>
                        <tbody id="linesBody">
                          <tr><td colspan="9" class="text-center text-muted py-3">No lines</td></tr>
                        </tbody>
                      </table>
                    </div>
                  </div>
                </form>
              </div>
              <!-- END LEFT COLUMN -->

              <!-- RIGHT COLUMN: Summary & Notes -->
              <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">Invoice 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="display_subtotal">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="cgst_row" style="display: none;">
                            <span class="text-muted fs-10">CGST:</span>
                            <strong class="text-success fs-10" id="display_cgst">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="sgst_row" style="display: none;">
                            <span class="text-muted fs-10">SGST:</span>
                            <strong class="text-success fs-10" id="display_sgst">₹0.00</strong>
                          </div>
                          <div class="d-flex justify-content-between mb-1" id="igst_row" style="display: none;">
                            <span class="text-muted fs-10">IGST:</span>
                            <strong class="text-info fs-10" id="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="display_grand_total">₹0.00</strong>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>

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

          <!-- Sticky Footer -->
          <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>
              <!-- Create from Stock Issue Mode -->
              <button type="button" class="btn btn-sm btn-primary d-none" id="btnCreateFromStockIssue" disabled>
                <i class="fas fa-magic me-1"></i>Create Draft Invoice
              </button>
              <button type="button" class="btn btn-sm btn-success d-none" id="btnCreateInvoice" disabled>
                <i class="fas fa-check me-1"></i>Create Invoice
              </button>

              <!-- View/Edit Mode Action Buttons -->
              <button type="button" class="btn btn-sm btn-warning d-none" id="btnEditInvoice">
                <i class="fas fa-edit me-1"></i>Edit
              </button>
              <button type="button" class="btn btn-sm btn-primary d-none" id="btnSaveInvoice">
                <i class="fas fa-save me-1"></i>Save Changes
              </button>
              <button type="button" class="btn btn-sm btn-danger d-none" id="btnDeleteInvoice">
                <i class="fas fa-trash me-1"></i>Delete
              </button>
              <button type="button" class="btn btn-sm btn-success d-none" id="btnPostInvoice">
                <i class="fas fa-check-circle me-1"></i>Post
              </button>
              <button type="button" class="btn btn-sm btn-info d-none" id="btnPrintInvoice">
                <i class="fas fa-print me-1"></i>Print
              </button>
              <button type="button" class="btn btn-sm btn-danger d-none" id="btnCancelInvoice">
                <i class="fas fa-ban me-1"></i>Cancel Invoice
              </button>
            </div>
          </div>
        </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-invoices.js') }}"></script>
@endpush

@push('styles')
<style>
  /* Scope: Offcanvas UX (same rules as SO/PO) */
  .so-order-offcanvas {
    height: 100vh;
  }

  .so-order-offcanvas .so-offcanvas-body {
    min-height: 0;
    overflow: hidden;
  }

  .so-order-offcanvas .so-left-col,
  .so-order-offcanvas form#invoiceForm,
  .so-order-offcanvas #linesTableContainer {
    min-height: 0;
  }

  .so-order-offcanvas .so-lines-table {
    overflow-y: auto;
    overflow-x: hidden;
  }

  @media (max-width: 991.98px) {
    .so-order-offcanvas {
      width: 100vw !important;
      max-width: 100vw !important;
    }

    .so-order-offcanvas .so-right-col .sticky-top {
      position: static;
      top: auto;
    }
  }
</style>
@endpush