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

{% block title %}Blood Unit Management{% endblock %}

{% block extra_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" />
{% endblock %}

{% block content %}
<!-- BEGIN breadcrumb -->
<ol class="breadcrumb float-xl-end">
    <li class="breadcrumb-item"><a href="{% url 'core:dashboard' %}">Home</a></li>
    <li class="breadcrumb-item"><a href="{% url 'blood_bank:dashboard' %}">Blood Bank</a></li>
    <li class="breadcrumb-item active">Blood Units</li>
</ol>
<!-- END breadcrumb -->

<!-- BEGIN page-header -->
<h1 class="page-header">Blood Unit Management <small>track and manage blood inventory</small></h1>
<!-- END page-header -->

<!-- BEGIN panel -->
<div class="panel panel-inverse">
    <div class="panel-heading">
        <h4 class="panel-title">Blood Unit Inventory</h4>
        <div class="panel-heading-btn">
            <a href="{% url 'blood_bank:blood_unit_create' %}" class="btn btn-primary btn-sm">
                <i class="fa fa-plus"></i> Register Blood Unit
            </a>
        </div>
    </div>
    <div class="panel-body">
        <!-- BEGIN search and filter form -->
        <form method="get" class="mb-4">
            <div class="row">
                <div class="col-md-3">
                    <div class="form-group">
                        <label for="blood_group">Blood Group</label>
                        {{ form.blood_group }}
                    </div>
                </div>
                <div class="col-md-3">
                    <div class="form-group">
                        <label for="component">Component</label>
                        {{ form.component }}
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="form-group">
                        <label for="status">Status</label>
                        {{ form.status }}
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="form-group">
                        <label for="expiry_days">Expiring in (days)</label>
                        {{ form.expiry_days }}
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="form-group">
                        <label>&nbsp;</label>
                        <div class="d-grid">
                            <button type="submit" class="btn btn-primary">
                                <i class="fa fa-search"></i> Filter
                            </button>
                        </div>
                    </div>
                </div>
            </div>
        </form>
        <!-- END search and filter form -->

        <!-- BEGIN summary cards -->
        <div class="row mb-4">
            <div class="col-md-3">
                <div class="card bg-primary text-white">
                    <div class="card-body">
                        <div class="d-flex justify-content-between">
                            <div>
                                <h6 class="card-title">Available Units</h6>
                                <h3 class="mb-0">{{ page_obj.paginator.count }}</h3>
                            </div>
                            <div class="align-self-center">
                                <i class="fa fa-tint fa-2x"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-md-3">
                <div class="card bg-success text-white">
                    <div class="card-body">
                        <div class="d-flex justify-content-between">
                            <div>
                                <h6 class="card-title">Fresh Units</h6>
                                <h3 class="mb-0">
                                    {{ page_obj.object_list|length }}
                                </h3>
                            </div>
                            <div class="align-self-center">
                                <i class="fa fa-check-circle fa-2x"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-md-3">
                <div class="card bg-warning text-white">
                    <div class="card-body">
                        <div class="d-flex justify-content-between">
                            <div>
                                <h6 class="card-title">Expiring Soon</h6>
                                <h3 class="mb-0" id="expiringSoonCount">0</h3>
                            </div>
                            <div class="align-self-center">
                                <i class="fa fa-exclamation-triangle fa-2x"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-md-3">
                <div class="card bg-danger text-white">
                    <div class="card-body">
                        <div class="d-flex justify-content-between">
                            <div>
                                <h6 class="card-title">Expired Units</h6>
                                <h3 class="mb-0" id="expiredCount">0</h3>
                            </div>
                            <div class="align-self-center">
                                <i class="fa fa-times-circle fa-2x"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <!-- END summary cards -->

        <!-- BEGIN table -->
        <div class="table-responsive">
            <table id="bloodUnitTable" class="table table-striped table-bordered align-middle">
                <thead>
                    <tr>
                        <th>Unit Number</th>
                        <th>Donor</th>
                        <th>Blood Group</th>
                        <th>Component</th>
                        <th>Collection Date</th>
                        <th>Expiry Date</th>
                        <th>Volume (ml)</th>
                        <th>Status</th>
                        <th>Location</th>
                        <th>Days to Expiry</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    {% for unit in page_obj %}
                    <tr data-unit-id="{{ unit.id }}" data-days-to-expiry="{{ unit.days_to_expiry }}" data-status="{{ unit.status }}">
                        <td>
                            <a href="{% url 'blood_bank:blood_unit_detail' unit.id %}" class="text-decoration-none">
                                <strong>{{ unit.unit_number }}</strong>
                            </a>
                        </td>
                        <td>
                            <a href="{% url 'blood_bank:donor_detail' unit.donor.id %}" class="text-decoration-none">
                                {{ unit.donor.full_name }}
                            </a>
                            <br>
                            <small class="text-muted">{{ unit.donor.donor_id }}</small>
                        </td>
                        <td>
                            <span class="badge bg-primary fs-6">{{ unit.blood_group.display_name }}</span>
                        </td>
                        <td>{{ unit.component.get_name_display }}</td>
                        <td>{{ unit.collection_date|date:"M d, Y H:i" }}</td>
                        <td>
                            {{ unit.expiry_date|date:"M d, Y" }}
                            {% if unit.days_to_expiry <= 3 and unit.status == 'available' %}
                                <br><span class="badge bg-danger">Expiring Soon</span>
                            {% elif unit.is_expired %}
                                <br><span class="badge bg-danger">Expired</span>
                            {% endif %}
                        </td>
                        <td>{{ unit.volume_ml }}</td>
                        <td>
                            {% if unit.status == 'available' %}
                                <span class="badge bg-success">{{ unit.get_status_display }}</span>
                            {% elif unit.status == 'expired' %}
                                <span class="badge bg-danger">{{ unit.get_status_display }}</span>
                            {% elif unit.status == 'issued' %}
                                <span class="badge bg-info">{{ unit.get_status_display }}</span>
                            {% elif unit.status == 'transfused' %}
                                <span class="badge bg-primary">{{ unit.get_status_display }}</span>
                            {% elif unit.status == 'discarded' %}
                                <span class="badge bg-dark">{{ unit.get_status_display }}</span>
                            {% else %}
                                <span class="badge bg-warning">{{ unit.get_status_display }}</span>
                            {% endif %}
                        </td>
                        <td>{{ unit.location }}</td>
                        <td>
                            {% if unit.is_expired %}
                                <span class="text-danger fw-bold">Expired</span>
                            {% elif unit.days_to_expiry <= 3 %}
                                <span class="text-warning fw-bold">{{ unit.days_to_expiry }} days</span>
                            {% else %}
                                <span class="text-success">{{ unit.days_to_expiry }} days</span>
                            {% endif %}
                        </td>
                        <td>
                            <div class="btn-group" role="group">
                                <a href="{% url 'blood_bank:blood_unit_detail' unit.id %}" 
                                   class="btn btn-outline-primary btn-sm" title="View Details">
                                    <i class="fa fa-eye"></i>
                                </a>
                                {% if unit.status == 'collected' or unit.status == 'testing' %}
                                <a href="{% url 'blood_bank:blood_test_create' unit.id %}" 
                                   class="btn btn-outline-success btn-sm" title="Add Test">
                                    <i class="fa fa-flask"></i>
                                </a>
                                {% endif %}
                                {% if unit.status == 'available' %}
                                <button type="button" class="btn btn-outline-warning btn-sm" 
                                        onclick="moveUnit({{ unit.id }})" title="Move Location">
                                    <i class="fa fa-arrows-alt"></i>
                                </button>
                                {% endif %}
                            </div>
                        </td>
                    </tr>
                    {% empty %}
                    <tr>
                        <td colspan="11" class="text-center">
                            <div class="py-4">
                                <i class="fa fa-tint fa-3x text-muted mb-3"></i>
                                <h5 class="text-muted">No blood units found</h5>
                                <p class="text-muted">Try adjusting your search criteria or register a new blood unit.</p>
                                <a href="{% url 'blood_bank:blood_unit_create' %}" class="btn btn-primary">
                                    <i class="fa fa-plus"></i> Register Blood Unit
                                </a>
                            </div>
                        </td>
                    </tr>
                    {% endfor %}
                </tbody>
            </table>


        </div>
        <!-- END table -->

        <!-- BEGIN pagination -->
     {% if is_paginated %}
            {% include 'partial/pagination.html' %}
    {% endif %}
        <!-- END pagination -->

        <!-- BEGIN summary -->
        <div class="row mt-3">

            <div class="col-md-6 text-end">
                <div class="btn-group" role="group">
                    <button type="button" class="btn btn-outline-secondary btn-sm" onclick="window.print()">
                        <i class="fa fa-print"></i> Print
                    </button>
                    <button type="button" class="btn btn-outline-secondary btn-sm" onclick="exportToCSV()">
                        <i class="fa fa-download"></i> Export
                    </button>
                    <button type="button" class="btn btn-outline-info btn-sm" onclick="showExpiryReport()">
                        <i class="fa fa-chart-bar"></i> Expiry Report
                    </button>
                </div>
            </div>
        </div>
        <!-- END summary -->
    </div>
</div>
<!-- END panel -->

<!-- BEGIN move unit modal -->
<div class="modal fade" id="moveUnitModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Move Blood Unit</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <form id="moveUnitForm">
                    <div class="mb-3">
                        <label for="newLocation" class="form-label">New Location</label>
                        <select class="form-select" id="newLocation" required>
                            <option value="">Select Location</option>
                            <option value="Refrigerator A">Refrigerator A</option>
                            <option value="Refrigerator B">Refrigerator B</option>
                            <option value="Freezer 1">Freezer 1</option>
                            <option value="Platelet Agitator">Platelet Agitator</option>
                            <option value="Quarantine">Quarantine</option>
                        </select>
                    </div>
                    <div class="mb-3">
                        <label for="moveReason" class="form-label">Reason for Move</label>
                        <textarea class="form-control" id="moveReason" rows="3"></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="confirmMoveUnit()">Move Unit</button>
            </div>
        </div>
    </div>
</div>
<!-- END move unit modal -->
{% endblock %}

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

<script>
$(document).ready(function() {
    // Initialize Select2 for filters
    $('.form-select').select2({
        theme: 'bootstrap-5',
        width: '100%'
    });

    // Initialize DataTable
    $('#bloodUnitTable').DataTable({
        responsive: true,
        pageLength: 25,
        order: [[4, 'desc']], // Sort by collection date
        columnDefs: [
            { orderable: false, targets: [10] } // Actions column
        ]
    });

    // Calculate summary statistics
    calculateSummaryStats();
});

function calculateSummaryStats() {
    var expiringSoon = 0;
    var expired = 0;
    
    $('tr[data-unit-id]').each(function() {
        var daysToExpiry = parseInt($(this).data('days-to-expiry'));
        var status = $(this).data('status');
        
        if (status === 'expired' || daysToExpiry === 0) {
            expired++;
        } else if (daysToExpiry <= 7 && status === 'available') {
            expiringSoon++;
        }
    });
    
    $('#expiringSoonCount').text(expiringSoon);
    $('#expiredCount').text(expired);
}

var currentUnitId = null;

function moveUnit(unitId) {
    currentUnitId = unitId;
    $('#moveUnitModal').modal('show');
}

function confirmMoveUnit() {
    var newLocation = $('#newLocation').val();
    var reason = $('#moveReason').val();
    
    if (!newLocation) {
        Swal.fire({
            icon: 'error',
            title: 'Missing Information',
            text: 'Please select a new location.',
            confirmButtonText: 'OK'
        });
        return;
    }
    
    // Here you would make an AJAX call to update the unit location
    // For now, we'll just show a success message
    Swal.fire({
        icon: 'success',
        title: 'Unit Moved',
        text: 'Blood unit has been moved to ' + newLocation,
        confirmButtonText: 'OK'
    }).then(() => {
        $('#moveUnitModal').modal('hide');
        location.reload(); // Refresh the page
    });
}

function exportToCSV() {
    var csv = [];
    var rows = document.querySelectorAll("#bloodUnitTable tr");
    
    for (var i = 0; i < rows.length; i++) {
        var row = [], cols = rows[i].querySelectorAll("td, th");
        
        for (var j = 0; j < cols.length - 1; j++) { // Exclude actions column
            row.push(cols[j].innerText.replace(/,/g, ';'));
        }
        
        csv.push(row.join(","));
    }
    
    var csvFile = new Blob([csv.join("\n")], {type: "text/csv"});
    var downloadLink = document.createElement("a");
    downloadLink.download = "blood_units.csv";
    downloadLink.href = window.URL.createObjectURL(csvFile);
    downloadLink.style.display = "none";
    document.body.appendChild(downloadLink);
    downloadLink.click();
}

function showExpiryReport() {
    var expiryData = {};
    
    $('tr[data-unit-id]').each(function() {
        var daysToExpiry = parseInt($(this).data('days-to-expiry'));
        var status = $(this).data('status');
        
        if (status === 'available') {
            if (daysToExpiry <= 0) {
                expiryData['Expired'] = (expiryData['Expired'] || 0) + 1;
            } else if (daysToExpiry <= 3) {
                expiryData['1-3 days'] = (expiryData['1-3 days'] || 0) + 1;
            } else if (daysToExpiry <= 7) {
                expiryData['4-7 days'] = (expiryData['4-7 days'] || 0) + 1;
            } else if (daysToExpiry <= 14) {
                expiryData['8-14 days'] = (expiryData['8-14 days'] || 0) + 1;
            } else {
                expiryData['15+ days'] = (expiryData['15+ days'] || 0) + 1;
            }
        }
    });
    
    var reportHtml = '<table class="table table-sm"><thead><tr><th>Expiry Range</th><th>Count</th></tr></thead><tbody>';
    
    Object.keys(expiryData).forEach(function(range) {
        reportHtml += '<tr><td>' + range + '</td><td>' + expiryData[range] + '</td></tr>';
    });
    
    reportHtml += '</tbody></table>';
    
    Swal.fire({
        title: 'Blood Unit Expiry Report',
        html: reportHtml,
        width: '500px',
        confirmButtonText: 'Close'
    });
}
</script>
{% endblock %}