@extends('layouts.app')

@section('title', 'Purchase Orders')

@section('content')
<div class="" id="purchaseOrderModule">
  <div class="card mb-3" id="ordersTableCard">
    <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">Purchase Orders</h6>
        </div>
        <div class="col-8 col-sm-auto text-end ps-2">
          <div class="d-none" id="table-orders-actions">
            <div class="d-flex">
              <select class="form-select form-select-sm" aria-label="Bulk actions">
                <option selected>Bulk actions</option>
                <option value="submit">Submit Selected</option>
                <option value="approve">Approve Selected</option>
                <option value="cancel">Cancel Selected</option>
                <option value="delete">Delete</option>
                <option value="export">Export Selected</option>
              </select>
              <button class="btn btn-falcon-default btn-sm ms-2" type="button">Apply</button>
            </div>
          </div>
          <div id="table-orders-replace-element">
            <select id="filter_show_deleted" class="form-select form-select-sm d-inline-block me-2" style="width: 160px;" aria-label="Include deleted">
              <option value="">Active Only</option>
              <option value="with">Include Deleted</option>
              <option value="only">Deleted Only</option>
            </select>
            <button class="btn btn-falcon-default btn-sm" type="button" data-bs-toggle="collapse"
              data-bs-target="#ordersFilters">
              <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>
            @can('purchase.view')
            <button class="btn btn-falcon-default btn-sm mx-2" type="button" id="exportOrders">
              <span class="fas fa-external-link-alt" data-fa-transform="shrink-3 down-2"></span>
              <span class="d-none d-sm-inline-block ms-1">Export</span>
            </button>
            @endcan
            @can('purchase.view')
            <button class="btn btn-primary btn-sm" type="button" id="newOrderBtn">
              <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>
            @endcan
          </div>
        </div>
      </div>
    </div>

    <!-- Advanced Filters (Collapsible) -->
    <div class="collapse" id="ordersFilters">
      <div class="card-body border-top fs-10">
        <div class="row g-3">
          <form id="ordersFilterForm" 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_vendor" class="form-select form-select-sm" name="vendor_id">
                <option value="">All Vendors</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="SUBMITTED">Submitted</option>
                <option value="PARTIAL">Partially Received</option>
                <option value="COMPLETED">Completed</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="PO Number / Reference" 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="applyOrdersFilters"><i
                  class="fas fa-search"></i> Apply</button>
              <button class="btn btn-outline-secondary btn-sm" type="button" id="clearOrdersFilters"><i
                  class="fas fa-times"></i> Clear</button>
            </div>
          </form>
        </div>
      </div>
    </div>

    <!-- Table -->
    <div class="card-body p-0">
      <div class="table-responsive scrollbar js-vh-table" style="overflow:auto;">
        <table class="table table-sm fs-10 mb-0 overflow-hidden" id="ordersTable">
          <thead class="bg-200">
            <tr>
              <th class="text-900 sort align-middle" data-sort="po_number">PO Number</th>
              <th class="text-900 sort align-middle" data-sort="po_date">PO Date</th>
              <th class="text-900 sort align-middle" data-sort="vendor">Vendor</th>
              <th class="text-900 sort align-middle" data-sort="tax_type">Tax Type</th>
              <th class="text-900 sort align-middle" data-sort="lines">Lines</th>
              <th class="text-900 sort align-middle" data-sort="grand_total">Grand Total</th>
              <th class="text-900 sort align-middle" data-sort="status">Status</th>
              <th class="text-900 sort align-middle">Operations</th>
              <th class="text-900 align-middle text-end">Actions</th>
            </tr>
          </thead>
          <tbody class="list" id="ordersTbody">
            <tr>
              <td colspan="9" class="text-center py-4">
                <div class="spinner-border spinner-border-sm text-primary" role="status">
                  <span class="visually-hidden">Loading...</span>
                </div>
                <p class="text-muted mb-0 mt-2">Loading purchase orders...</p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
    </div>

  </div>
</div>

<!-- Offcanvas Form -->
<div class="offcanvas offcanvas-end d-flex flex-column so-order-offcanvas" tabindex="-1" id="orderFormOffcanvas"
  aria-labelledby="orderFormOffcanvasLabel" 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="orderFormOffcanvasLabel">New Purchase Order</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="orderForm" class="needs-validation d-flex flex-column h-100" novalidate style="overflow: hidden; min-height: 0;">
                <input type="hidden" id="order_id" name="id">

            <!-- Scrollable form fields container -->
            <div class="flex-shrink-0">
            <!-- Company GSTIN | Customer | Customer GSTIN in one row -->
            <div class="row g-2 mb-2">
              <div class="col-md-4">
                <label class="form-label required" for="company_gst_id">Company GSTIN</label>
                <select id="company_gst_id" name="company_gst_id" class="form-select form-select-sm" required>
                  <option value="">Select company GSTIN...</option>
                </select>
                <div class="invalid-feedback">Please select company GSTIN.</div>
              </div>
              <div class="col-md-4">
                <label class="form-label required" for="vendor_id">Vendor</label>
                <select id="vendor_id" name="vendor_id" class="form-select form-select-sm" required>
                  <option value="">Select vendor...</option>
                </select>
                <div class="invalid-feedback">Please select a vendor.</div>
              </div>
              <div class="col-md-4">
                <label class="form-label" for="vendor_gstin_id">
                  Vendor GSTIN 
                  <span class="text-warning">(Leave blank for exempted tax type)</span>
                </label>
                <select id="vendor_gstin_id" name="vendor_gstin_id" class="form-select form-select-sm">
                  <option value="">Select vendor GSTIN (optional)...</option>
                </select>
              </div>
            </div>

            <!-- Tax Type Display -->
            <div class="row g-2 mb-2" id="taxTypeDisplay" style="display: none;">
              <div class="col-12">
                <div class="alert alert-info mb-0 d-flex align-items-center">
                  <i class="fas fa-info-circle me-2"></i>
                  <div>
                    <strong>Tax Type:</strong>
                    <span id="taxTypeBadge" class="badge rounded-pill ms-2"></span>
                    <span id="taxTypeDescription" class="ms-2 fs-10"></span>
                  </div>
                </div>
              </div>
            </div>

            <!-- SO Details -->
            <div class="row g-2 mb-2">
              <div class="col-md-4">
                <label class="form-label required" for="po_date">PO Date</label>
                <input type="date" id="po_date" name="po_date" class="form-control form-control-sm" value="{{ date('Y-m-d') }}" required>
                <div class="invalid-feedback">Please enter PO date.</div>
              </div>
              <div class="col-md-4">
                <label class="form-label required" for="delivery_date">Est. Delivery Date</label>
                <input type="date" id="delivery_date" name="delivery_date" class="form-control form-control-sm" required>
                <div class="invalid-feedback">Please enter delivery date.</div>
              </div>
              <div class="col-md-4">
                <label class="form-label" for="reference_number">Vendor Reference</label>
                <input type="text" id="reference_number" name="reference_number" class="form-control form-control-sm"
                  placeholder="Customer PO / Reference">
              </div>
            </div>

            <!-- Addresses -->
            <input type="hidden" id="billing_address_id" name="billing_address_id">
            <input type="hidden" id="shipping_address_id" name="shipping_address_id">
            
            <div class="row g-2 mb-2">
              <div class="col-md-6">
                <label class="form-label required" for="billing_address">Billing Address</label>
                <textarea id="billing_address" name="billing_address" class="form-control form-control-sm" rows="3" required
                  placeholder="Select vendor GSTIN to auto-fill address" readonly style="background-color: #f8f9fa;"></textarea>
                <div class="invalid-feedback">Please select vendor GSTIN to populate billing address.</div>
              </div>
              <div class="col-md-6">
                <div class="d-flex align-items-center justify-content-between mb-2">
                  <label class="form-label mb-0" for="shipping_address">Shipping Address</label>
                  <div class="mb-0" style="padding-left: 0;">
                    <input class="" type="checkbox" id="same_as_billing" name="same_as_billing" style="margin-bottom: -10px;">
                    <label class="text-primary" for="same_as_billing" style="cursor: pointer;margin-bottom: -10px;" >Same as billing</label>
                  </div>
                </div>
                <textarea id="shipping_address" name="shipping_address" class="form-control form-control-sm" rows="3"
                  placeholder="Enter shipping address or check 'Same as billing'"></textarea>
              </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" id="addLineBtn" style="margin-right: 5px;">
                  <i class="fas fa-plus me-1"></i>Add Line
                </button>
              </div>

              <!-- Lines Table with Loading Overlay -->
              <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">
                <!-- Loading overlay -->
                <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 <span class="text-danger">*</span></th>
                      <th style="width:10%"><i class="fas fa-cube me-1"></i>Qty <span class="text-danger">*</span></th>
                      <th style="width:9%"><i class="fas fa-balance-scale me-1"></i>UOM <span class="text-danger">*</span></th>
                      <th style="width:10%"><i class="fas fa-tag me-1"></i>Rate <span class="text-danger">*</span></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">
                    <!-- Dynamic rows will be added here -->
                  </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;">
                <!-- Calculation Summary Card -->
                <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">Order 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>

                <!-- Additional Information - Collapsible -->
                <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 class="mb-2">
                          <label class="form-label fw-semibold fs-10" for="notes">
                            <i class="fas fa-sticky-note me-1"></i>Notes
                          </label>
                          <textarea id="notes" name="notes" class="form-control form-control-sm" rows="3"
                            placeholder="Internal notes..."></textarea>
                        </div>
                        <div>
                          <label class="form-label fw-semibold fs-10" for="terms_conditions">
                            <i class="fas fa-file-contract me-1"></i>Terms
                          </label>
                          <textarea id="terms_conditions" name="terms_conditions" class="form-control form-control-sm" rows="3"
                            placeholder="Terms & Conditions..."></textarea>
                        </div>

                        <div class="mt-2 d-none" id="deletion_reason_wrap">
                          <label class="form-label fw-semibold fs-10" for="deletion_reason">
                            <i class="fas fa-user-times me-1"></i>Deletion Reason
                          </label>
                          <textarea id="deletion_reason" class="form-control form-control-sm" rows="3" readonly
                            placeholder="-"></textarea>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <!-- END RIGHT COLUMN -->
          </div>
          <!-- END ROW -->
        </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>
          <button type="button" class="btn btn-sm btn-secondary d-none" id="resetOrderBtn">
            <i class="fas fa-undo me-1"></i>Reset
          </button>
          <button type="button" class="btn btn-sm btn-primary d-none" id="editOrderBtn">
            <i class="fas fa-edit me-1"></i>Edit
          </button>
          <button type="button" class="btn btn-sm btn-primary" id="saveOrderBtn">
            <i class="fas fa-save me-1"></i><span id="saveBtnText">Save as Draft</span>
          </button>
        </div>
      </div>
    </div>
  </div>
</div>

<!-- Line Template -->
<template id="lineTemplate">
  <tr class="line-row" data-line-index="__INDEX__" style="transition: background-color 0.15s ease;">
    <td class="ps-2" style="vertical-align: middle;">
      <select class="form-select form-select-sm variant-select" name="lines[__INDEX__][product_variant_id]" required style="min-height: 32px;">
        <option value="">Select variant...</option>
      </select>
    </td>
    <td style="vertical-align: middle;">
      <input type="number" step="0.0001" min="0.0001" class="form-control form-control-sm qty-input" name="lines[__INDEX__][qty]" placeholder="Qty" required style="min-height: 32px;">
    </td>
    <td style="vertical-align: middle;">
      <select class="form-select form-select-sm uom-select" name="lines[__INDEX__][uom_id]" required style="min-height: 32px;">
        <option value="">UOM...</option>
      </select>
    </td>
    <td style="vertical-align: middle;">
      <input type="number" step="0.0001" min="0" class="form-control form-control-sm rate-input" name="lines[__INDEX__][rate]" placeholder="Rate" required style="min-height: 32px;">
    </td>
    <td style="vertical-align: middle;">
      <div class="d-flex align-items-center gap-1">
        <input type="number" step="0.0001" min="0.0001" class="form-control form-control-sm base-rate-input" style="min-height: 32px; font-size: 0.8rem; max-width: 100px;" placeholder="Auto/Manual">
        <small class="text-muted base-uom-label" style="font-size: 0.75rem; white-space: nowrap;">-</small>
      </div>
    </td>
    <td class="ps-2" style="vertical-align: middle; padding: 0.5rem;">
      <span class="hsn-display text-dark" style="font-size: 0.8rem;">-</span>
    </td>
    <td class="ps-2" style="vertical-align: middle; padding: 0.5rem;">
      <span class="tax-display text-dark fw-semibold" style="font-size: 0.8rem;">-</span>
    </td>
    <td class="ps-2" style="vertical-align: middle; padding: 0.5rem;">
      <strong class="amount-display" style="font-size: 0.875rem;">₹0.00</strong>
    </td>
    <td class="text-center" style="vertical-align: middle; width: 48px; padding-left: 0.25rem; padding-right: 0.25rem;">
      <button class="btn btn-sm btn-link p-1 text-danger remove-line" type="button" title="Remove line" style="line-height: 1;">
        <i class="fas fa-trash-alt"></i>
      </button>
    </td>
  </tr>
</template>
@endsection

@push('scripts')
<link rel="stylesheet" href="{{ asset('assets/css/forms-standard.css') }}">
<script src="{{ asset('assets/js/common/uom-rate-converter.js') }}"></script>
<script src="{{ asset('assets/js/custom/purchase/purchase-orders.js') }}"></script>
@endpush

@push('styles')
<style>
  /* Scope: Sales Order offcanvas */
  .so-order-offcanvas {
    height: 100vh;
  }

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

  /* Ensure the line-items table becomes the scrolling region */
  .so-order-offcanvas .so-left-col,
  .so-order-offcanvas form#orderForm,
  .so-order-offcanvas #linesTableContainer {
    min-height: 0;
  }

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

  /* On smaller screens: use full-width offcanvas and disable sticky sidebar */
  @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