{% extends 'base.html' %}
{% load static %}

{% block title %}Insurance Claims Management{% endblock %}

{% block css %}
<link href="{% static 'plugins/datatables.net-bs5/css/dataTables.bootstrap5.min.css' %}" rel="stylesheet" />
<link href="{% static 'plugins/datatables.net-responsive-bs5/css/responsive.bootstrap5.min.css' %}" rel="stylesheet" />
<link href="{% static 'plugins/select2/dist/css/select2.min.css' %}" rel="stylesheet" />
<style>
    .stats-card {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border: none;
        color: white;
        transition: transform 0.3s ease;
    }
    .stats-card:hover {
        transform: translateY(-5px);
    }
    .stats-card .card-body {
        padding: 1.5rem;
    }
    .stats-icon {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.2);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
    }
    .filter-card {
        background: #f8f9fa;
        border: 1px solid #e9ecef;
        border-radius: 10px;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    .claim-status-badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
        border-radius: 50px;
    }
    .priority-indicator {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        display: inline-block;
        margin-right: 5px;
    }
    .priority-low { background-color: #28a745; }
    .priority-normal { background-color: #17a2b8; }
    .priority-high { background-color: #ffc107; }
    .priority-urgent { background-color: #fd7e14; }
    .priority-emergency { background-color: #dc3545; }
    .action-buttons .btn {
        margin-right: 5px;
        margin-bottom: 5px;
    }
    .table-responsive {
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    }
    .bulk-actions {
        background: #fff;
        padding: 1rem;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        margin-bottom: 1rem;
        display: none;
    }
    .bulk-actions.show {
        display: block;
    }
</style>
{% endblock %}

{% block content %}
<div id="content" class="app-content">
    <!-- Page Header -->
    <div class="d-flex align-items-center mb-3">
        <div>
            <ol class="breadcrumb">
                <li class="breadcrumb-item"><a href="{% url 'core:dashboard' %}">Dashboard</a></li>
                <li class="breadcrumb-item"><a href="{% url 'patients:patient_list' %}">Patients</a></li>
                <li class="breadcrumb-item active">Insurance Claims</li>
            </ol>
            <h1 class="page-header mb-0">Insurance Claims Management</h1>
        </div>
        <div class="ms-auto">
            <div class="btn-group">
                <a href="{% url 'patients:claims_dashboard' %}" class="btn btn-info">
                    <i class="fas fa-chart-bar me-2"></i>Dashboard
                </a>
                <a href="{% url 'patients:insurance_claim_create' %}" class="btn btn-primary">
                    <i class="fas fa-plus me-2"></i>New Claim
                </a>
            </div>
        </div>
    </div>

    <!-- Statistics Cards -->
    <div class="row mb-4">
        <div class="col-xl-3 col-md-6">
            <div class="card stats-card">
                <div class="card-body d-flex align-items-center">
                    <div class="stats-icon me-3">
                        <i class="fas fa-file-medical"></i>
                    </div>
                    <div>
                        <div class="fs-6 text-white-75">Total Claims</div>
                        <div class="fs-3 fw-bold">{{ stats.total_claims|default:0 }}</div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-xl-3 col-md-6">
            <div class="card stats-card">
                <div class="card-body d-flex align-items-center">
                    <div class="stats-icon me-3">
                        <i class="fas fa-money-bill-wave"></i>
                    </div>
                    <div>
                        <div class="fs-6 text-white-75">Total Billed</div>
                        <div class="fs-3 fw-bold">{{ stats.total_billed|floatformat:0|default:0 }} SAR</div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-xl-3 col-md-6">
            <div class="card stats-card">
                <div class="card-body d-flex align-items-center">
                    <div class="stats-icon me-3">
                        <i class="fas fa-check-circle"></i>
                    </div>
                    <div>
                        <div class="fs-6 text-white-75">Total Approved</div>
                        <div class="fs-3 fw-bold">{{ stats.total_approved|floatformat:0|default:0 }} SAR</div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-xl-3 col-md-6">
            <div class="card stats-card">
                <div class="card-body d-flex align-items-center">
                    <div class="stats-icon me-3">
                        <i class="fas fa-calculator"></i>
                    </div>
                    <div>
                        <div class="fs-6 text-white-75">Average Claim</div>
                        <div class="fs-3 fw-bold">{{ stats.avg_amount|floatformat:0|default:0 }} SAR</div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Filters -->
    <div class="filter-card">
        <form method="get" id="filterForm">
            <div class="row g-3">
                <div class="col-md-3">
                    <label class="form-label">Search Claims</label>
                    <input type="text" class="form-control" name="search" value="{{ search_query }}" 
                           placeholder="Claim number, patient name, provider...">
                </div>
                <div class="col-md-2">
                    <label class="form-label">Status</label>
                    <select class="form-select" name="status">
                        <option value="">All Statuses</option>
                        {% for value, label in status_choices %}
                        <option value="{{ value }}" {% if status_filter == value %}selected{% endif %}>{{ label }}</option>
                        {% endfor %}
                    </select>
                </div>
                <div class="col-md-2">
                    <label class="form-label">Type</label>
                    <select class="form-select" name="type">
                        <option value="">All Types</option>
                        {% for value, label in type_choices %}
                        <option value="{{ value }}" {% if type_filter == value %}selected{% endif %}>{{ label }}</option>
                        {% endfor %}
                    </select>
                </div>
                <div class="col-md-2">
                    <label class="form-label">Priority</label>
                    <select class="form-select" name="priority">
                        <option value="">All Priorities</option>
                        {% for value, label in priority_choices %}
                        <option value="{{ value }}" {% if priority_filter == value %}selected{% endif %}>{{ label }}</option>
                        {% endfor %}
                    </select>
                </div>
                <div class="col-md-1">
                    <label class="form-label">From</label>
                    <input type="date" class="form-control" name="date_from" value="{{ date_from }}">
                </div>
                <div class="col-md-1">
                    <label class="form-label">To</label>
                    <input type="date" class="form-control" name="date_to" value="{{ date_to }}">
                </div>
                <div class="col-md-1 d-flex align-items-end">
                    <button type="submit" class="btn btn-primary me-2">
                        <i class="fas fa-search"></i>
                    </button>
                    <a href="{% url 'patients:insurance_claims_list' %}" class="btn btn-outline-secondary">
                        <i class="fas fa-times"></i>
                    </a>
                </div>
            </div>
        </form>
    </div>

    <!-- Bulk Actions -->
    <div class="bulk-actions" id="bulkActions">
        <div class="d-flex align-items-center justify-content-between">
            <div>
                <span class="fw-bold">Selected: <span id="selectedCount">0</span> claims</span>
            </div>
            <div class="btn-group">
                <button type="button" class="btn btn-sm btn-outline-primary" onclick="updateBulkStatus('SUBMITTED')">
                    <i class="fas fa-paper-plane me-1"></i>Submit
                </button>
                <button type="button" class="btn btn-sm btn-outline-success" onclick="updateBulkStatus('APPROVED')">
                    <i class="fas fa-check me-1"></i>Approve
                </button>
                <button type="button" class="btn btn-sm btn-outline-danger" onclick="updateBulkStatus('DENIED')">
                    <i class="fas fa-times me-1"></i>Deny
                </button>
                <button type="button" class="btn btn-sm btn-outline-info" onclick="exportSelected()">
                    <i class="fas fa-download me-1"></i>Export
                </button>
                <button type="button" class="btn btn-sm btn-outline-secondary" onclick="clearSelection()">
                    <i class="fas fa-times me-1"></i>Clear
                </button>
            </div>
        </div>
    </div>

    <!-- Claims Table -->
    <div class="card">
        <div class="card-body">
            <div class="table-responsive">
                <table class="table table-striped table-hover" id="claimsTable">
                    <thead class="table-dark">
                        <tr>
                            <th width="30">
                                <input type="checkbox" id="selectAll" class="form-check-input">
                            </th>
                            <th>Claim Number</th>
                            <th>Patient</th>
                            <th>Type</th>
                            <th>Status</th>
                            <th>Priority</th>
                            <th>Service Date</th>
                            <th>Provider</th>
                            <th>Billed Amount</th>
                            <th>Approved Amount</th>
                            <th>Actions</th>
                        </tr>
                    </thead>
                    <tbody>
                        {% for claim in claims %}
                        <tr>
                            <td>
                                <input type="checkbox" class="form-check-input claim-checkbox" value="{{ claim.id }}">
                            </td>
                            <td>
                                <a href="{% url 'patients:insurance_claim_detail' claim.id %}" class="text-decoration-none fw-bold">
                                    {{ claim.claim_number }}
                                </a>
                            </td>
                            <td>
                                <div class="d-flex align-items-center">
                                    <div class="avatar avatar-sm me-2">
                                        <i class="fas fa-user-circle fa-2x text-muted"></i>
                                    </div>
                                    <div>
                                        <div class="fw-bold">{{ claim.patient.get_full_name }}</div>
                                        <small class="text-muted">{{ claim.patient.mrn }}</small>
                                    </div>
                                </div>
                            </td>
                            <td>
                                <span class="badge bg-info">{{ claim.get_claim_type_display }}</span>
                            </td>
                            <td>
                                {% if claim.status == 'DRAFT' %}
                                    <span class="badge bg-secondary claim-status-badge">{{ claim.get_status_display }}</span>
                                {% elif claim.status == 'SUBMITTED' %}
                                    <span class="badge bg-primary claim-status-badge">{{ claim.get_status_display }}</span>
                                {% elif claim.status == 'UNDER_REVIEW' %}
                                    <span class="badge bg-warning claim-status-badge">{{ claim.get_status_display }}</span>
                                {% elif claim.status == 'APPROVED' or claim.status == 'PARTIALLY_APPROVED' %}
                                    <span class="badge bg-success claim-status-badge">{{ claim.get_status_display }}</span>
                                {% elif claim.status == 'DENIED' %}
                                    <span class="badge bg-danger claim-status-badge">{{ claim.get_status_display }}</span>
                                {% elif claim.status == 'PAID' %}
                                    <span class="badge bg-dark claim-status-badge">{{ claim.get_status_display }}</span>
                                {% else %}
                                    <span class="badge bg-light text-dark claim-status-badge">{{ claim.get_status_display }}</span>
                                {% endif %}
                            </td>
                            <td>
                                <span class="priority-indicator priority-{{ claim.priority|lower }}"></span>
                                {{ claim.get_priority_display }}
                            </td>
                            <td>{{ claim.service_date|date:"M d, Y" }}</td>
                            <td>
                                <div>
                                    <div class="fw-bold">{{ claim.service_provider|truncatechars:30 }}</div>
                                    <small class="text-muted">{{ claim.facility_name|truncatechars:25 }}</small>
                                </div>
                            </td>
                            <td class="text-end">
                                <span class="fw-bold">{{ claim.billed_amount|floatformat:2 }} SAR</span>
                            </td>
                            <td class="text-end">
                                <span class="fw-bold text-success">{{ claim.approved_amount|floatformat:2 }} SAR</span>
                            </td>
                            <td>
                                <div class="action-buttons">
                                    <a href="{% url 'patients:insurance_claim_detail' claim.id %}" 
                                       class="btn btn-sm btn-outline-primary" title="View Details">
                                        <i class="fas fa-eye"></i>
                                    </a>
                                    <a href="{% url 'patients:insurance_claim_edit' claim.id %}" 
                                       class="btn btn-sm btn-outline-secondary" title="Edit">
                                        <i class="fas fa-edit"></i>
                                    </a>
                                    <button type="button" class="btn btn-sm btn-outline-info" 
                                            onclick="showStatusModal({{ claim.id }}, '{{ claim.status }}')" title="Update Status">
                                        <i class="fas fa-sync"></i>
                                    </button>
                                    <a href="{% url 'patients:insurance_claim_delete' claim.id %}" 
                                       class="btn btn-sm btn-outline-danger" title="Delete">
                                        <i class="fas fa-trash"></i>
                                    </a>
                                </div>
                            </td>
                        </tr>
                        {% empty %}
                        <tr>
                            <td colspan="11" class="text-center py-5">
                                <div class="text-muted">
                                    <i class="fas fa-file-medical fa-3x mb-3"></i>
                                    <h5>No claims found</h5>
                                    <p>No insurance claims match your current filters.</p>
                                    <a href="{% url 'patients:insurance_claim_create' %}" class="btn btn-primary">
                                        <i class="fas fa-plus me-2"></i>Create First Claim
                                    </a>
                                </div>
                            </td>
                        </tr>
                        {% endfor %}
                    </tbody>
                </table>
            </div>

            <!-- Pagination -->
            {% if claims.has_other_pages %}
            <nav aria-label="Claims pagination" class="mt-4">
                <ul class="pagination justify-content-center">
                    {% if claims.has_previous %}
                        <li class="page-item">
                            <a class="page-link" href="?page={{ claims.previous_page_number }}{% if search_query %}&search={{ search_query }}{% endif %}{% if status_filter %}&status={{ status_filter }}{% endif %}{% if type_filter %}&type={{ type_filter }}{% endif %}{% if priority_filter %}&priority={{ priority_filter }}{% endif %}{% if date_from %}&date_from={{ date_from }}{% endif %}{% if date_to %}&date_to={{ date_to }}{% endif %}">
                                <i class="fas fa-chevron-left"></i>
                            </a>
                        </li>
                    {% endif %}
                    
                    {% for num in claims.paginator.page_range %}
                        {% if claims.number == num %}
                            <li class="page-item active">
                                <span class="page-link">{{ num }}</span>
                            </li>
                        {% elif num > claims.number|add:'-3' and num < claims.number|add:'3' %}
                            <li class="page-item">
                                <a class="page-link" href="?page={{ num }}{% if search_query %}&search={{ search_query }}{% endif %}{% if status_filter %}&status={{ status_filter }}{% endif %}{% if type_filter %}&type={{ type_filter }}{% endif %}{% if priority_filter %}&priority={{ priority_filter }}{% endif %}{% if date_from %}&date_from={{ date_from }}{% endif %}{% if date_to %}&date_to={{ date_to }}{% endif %}">{{ num }}</a>
                            </li>
                        {% endif %}
                    {% endfor %}
                    
                    {% if claims.has_next %}
                        <li class="page-item">
                            <a class="page-link" href="?page={{ claims.next_page_number }}{% if search_query %}&search={{ search_query }}{% endif %}{% if status_filter %}&status={{ status_filter }}{% endif %}{% if type_filter %}&type={{ type_filter }}{% endif %}{% if priority_filter %}&priority={{ priority_filter }}{% endif %}{% if date_from %}&date_from={{ date_from }}{% endif %}{% if date_to %}&date_to={{ date_to }}{% endif %}">
                                <i class="fas fa-chevron-right"></i>
                            </a>
                        </li>
                    {% endif %}
                </ul>
            </nav>
            {% endif %}
        </div>
    </div>
</div>

<!-- Status Update Modal -->
<div class="modal fade" id="statusModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Update Claim Status</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <form id="statusForm">
                    <input type="hidden" id="claimId" name="claim_id">
                    <div class="mb-3">
                        <label class="form-label">New Status</label>
                        <select class="form-select" id="newStatus" name="status" required>
                            {% for value, label in status_choices %}
                            <option value="{{ value }}">{{ label }}</option>
                            {% endfor %}
                        </select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Reason (Optional)</label>
                        <textarea class="form-control" name="reason" rows="3" 
                                  placeholder="Enter reason for status change..."></textarea>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" onclick="updateStatus()">Update Status</button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block js %}
<script src="{% static 'plugins/datatables.net/js/dataTables.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-bs5/js/dataTables.bootstrap5.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-responsive/js/dataTables.responsive.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-responsive-bs5/js/responsive.bootstrap5.min.js' %}"></script>
<script src="{% static 'plugins/select2/dist/js/select2.min.js' %}"></script>

<script>
$(document).ready(function() {
    // Initialize DataTable
    $('#claimsTable').DataTable({
        responsive: true,
        pageLength: 20,
        order: [[1, 'desc']],
        columnDefs: [
            { orderable: false, targets: [0, 10] }
        ]
    });

    // Select all functionality
    $('#selectAll').change(function() {
        $('.claim-checkbox').prop('checked', this.checked);
        updateBulkActions();
    });

    // Individual checkbox change
    $('.claim-checkbox').change(function() {
        updateBulkActions();
        
        // Update select all checkbox
        const totalCheckboxes = $('.claim-checkbox').length;
        const checkedCheckboxes = $('.claim-checkbox:checked').length;
        $('#selectAll').prop('checked', totalCheckboxes === checkedCheckboxes);
    });

    // Auto-submit filter form on change
    $('#filterForm select, #filterForm input[type="date"]').change(function() {
        $('#filterForm').submit();
    });
});

function updateBulkActions() {
    const selectedCount = $('.claim-checkbox:checked').length;
    $('#selectedCount').text(selectedCount);
    
    if (selectedCount > 0) {
        $('#bulkActions').addClass('show');
    } else {
        $('#bulkActions').removeClass('show');
    }
}

function showStatusModal(claimId, currentStatus) {
    $('#claimId').val(claimId);
    $('#newStatus').val(currentStatus);
    $('#statusModal').modal('show');
}

function updateStatus() {
    const claimId = $('#claimId').val();
    const formData = new FormData($('#statusForm')[0]);
    
    $.ajaxSetup({
        beforeSend: function(xhr, settings) {
            if (!this.crossDomain) {
                xhr.setRequestHeader("X-CSRFToken", $('[name=csrfmiddlewaretoken]').val());
            }
        }
    });
    
    $.ajax({
        url: `/patients/claims/${claimId}/update-status/`,
        method: 'POST',
        data: formData,
        processData: false,
        contentType: false,
        success: function(response) {
            if (response.success) {
                $('#statusModal').modal('hide');
                location.reload();
            } else {
                alert('Error: ' + response.error);
            }
        },
        error: function() {
            alert('Error updating status. Please try again.');
        }
    });
}

function updateBulkStatus(status) {
    const selectedIds = $('.claim-checkbox:checked').map(function() {
        return this.value;
    }).get();
    
    if (selectedIds.length === 0) {
        alert('Please select claims to update.');
        return;
    }
    
    if (!confirm(`Are you sure you want to update ${selectedIds.length} claims to ${status}?`)) {
        return;
    }
    
    $.ajaxSetup({
        beforeSend: function(xhr, settings) {
            if (!this.crossDomain) {
                xhr.setRequestHeader("X-CSRFToken", $('[name=csrfmiddlewaretoken]').val());
            }
        }
    });
    
    $.ajax({
        url: '{% url "patients:bulk_claim_actions" %}',
        method: 'POST',
        data: {
            action: 'update_status',
            new_status: status,
            claim_ids: selectedIds
        },
        success: function(response) {
            if (response.success) {
                location.reload();
            } else {
                alert('Error: ' + response.error);
            }
        },
        error: function() {
            alert('Error updating claims. Please try again.');
        }
    });
}

function exportSelected() {
    const selectedIds = $('.claim-checkbox:checked').map(function() {
        return this.value;
    }).get();
    
    if (selectedIds.length === 0) {
        alert('Please select claims to export.');
        return;
    }
    
    // Create form and submit
    const form = $('<form>', {
        method: 'POST',
        action: '{% url "patients:bulk_claim_actions" %}'
    });
    
    form.append($('<input>', {
        type: 'hidden',
        name: 'csrfmiddlewaretoken',
        value: $('[name=csrfmiddlewaretoken]').val()
    }));
    
    form.append($('<input>', {
        type: 'hidden',
        name: 'action',
        value: 'export'
    }));
    
    selectedIds.forEach(function(id) {
        form.append($('<input>', {
            type: 'hidden',
            name: 'claim_ids',
            value: id
        }));
    });
    
    $('body').append(form);
    form.submit();
    form.remove();
}

function clearSelection() {
    $('.claim-checkbox, #selectAll').prop('checked', false);
    updateBulkActions();
}
</script>
{% endblock %}