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

{% block title %}Delete Template - Communications{% endblock %}

{% block content %}
<div class="container-fluid">
    <!-- Breadcrumb -->
    <div class="row">
        <div class="col-12">
            <div class="page-title-box d-sm-flex align-items-center justify-content-between">
                <h4 class="mb-sm-0">Delete Template</h4>
                <div class="page-title-right">
                    <ol class="breadcrumb m-0">
                        <li class="breadcrumb-item"><a href="{% url 'core:dashboard' %}">Dashboard</a></li>
                        <li class="breadcrumb-item"><a href="{% url 'communications:dashboard' %}">Communications</a></li>
                        <li class="breadcrumb-item"><a href="{% url 'communications:notification_template_list' %}">Templates</a></li>
                        <li class="breadcrumb-item active">Delete</li>
                    </ol>
                </div>
            </div>
        </div>
    </div>

    <div class="row justify-content-center">
        <div class="col-lg-8">
            <div class="card">
                <div class="card-header bg-danger text-white">
                    <h5 class="card-title mb-0">
                        <i class="fas fa-exclamation-triangle me-2"></i>
                        Confirm Template Deletion
                    </h5>
                </div>
                <div class="card-body">
                    <!-- Warning Message -->
                    <div class="alert alert-warning" role="alert">
                        <div class="d-flex">
                            <div class="flex-shrink-0">
                                <i class="fas fa-exclamation-triangle fa-2x"></i>
                            </div>
                            <div class="flex-grow-1 ms-3">
                                <h5 class="alert-heading">Warning: Permanent Action</h5>
                                <p class="mb-0">
                                    You are about to permanently delete this notification template. This action cannot be undone.
                                    Any messages currently using this template may be affected.
                                </p>
                            </div>
                        </div>
                    </div>

                    <!-- Template Details -->
                    <div class="card bg-light">
                        <div class="card-body">
                            <h6 class="card-title">Template to be deleted:</h6>
                            <div class="row">
                                <div class="col-md-6">
                                    <div class="table-responsive">
                                        <table class="table table-borderless table-sm">
                                            <tr>
                                                <td class="fw-bold text-muted">Template Name:</td>
                                                <td>{{ object.template_name }}</td>
                                            </tr>
                                            <tr>
                                                <td class="fw-bold text-muted">Category:</td>
                                                <td>
                                                    <span class="badge bg-{% if object.category == 'APPOINTMENT' %}primary{% elif object.category == 'REMINDER' %}warning{% elif object.category == 'ALERT' %}danger{% else %}info{% endif %}">
                                                        {{ object.get_category_display }}
                                                    </span>
                                                </td>
                                            </tr>
                                            <tr>
                                                <td class="fw-bold text-muted">Message Type:</td>
                                                <td>
                                                    <span class="badge bg-{% if object.message_type == 'EMAIL' %}info{% elif object.message_type == 'SMS' %}success{% elif object.message_type == 'PUSH' %}warning{% else %}secondary{% endif %}">
                                                        {{ object.get_message_type_display }}
                                                    </span>
                                                </td>
                                            </tr>
                                        </table>
                                    </div>
                                </div>
                                <div class="col-md-6">
                                    <div class="table-responsive">
                                        <table class="table table-borderless table-sm">
                                            <tr>
                                                <td class="fw-bold text-muted">Status:</td>
                                                <td>
                                                    <span class="badge bg-{% if object.is_active %}success{% else %}secondary{% endif %}">
                                                        {% if object.is_active %}Active{% else %}Inactive{% endif %}
                                                    </span>
                                                </td>
                                            </tr>
                                            <tr>
                                                <td class="fw-bold text-muted">Usage Count:</td>
                                                <td>{{ object.usage_count|default:0 }} times</td>
                                            </tr>
                                            <tr>
                                                <td class="fw-bold text-muted">Created:</td>
                                                <td>{{ object.created_at|date:"M d, Y" }}</td>
                                            </tr>
                                        </table>
                                    </div>
                                </div>
                            </div>
                            
                            <!-- Template Content Preview -->
                            <div class="mt-3">
                                <h6 class="text-muted">Subject Template:</h6>
                                <div class="bg-white p-2 rounded border">
                                    <code>{{ object.subject_template }}</code>
                                </div>
                            </div>
                            
                            <div class="mt-3">
                                <h6 class="text-muted">Body Preview:</h6>
                                <div class="bg-white p-3 rounded border">
                                    {{ object.body_template|truncatewords:30|linebreaks }}
                                    {% if object.body_template|wordcount > 30 %}
                                        <small class="text-muted">[Content truncated...]</small>
                                    {% endif %}
                                </div>
                            </div>
                        </div>
                    </div>

                    <!-- Impact Assessment -->
                    <div class="mt-4">
                        <h6 class="text-muted mb-3">Deletion Impact:</h6>
                        <div class="row">
                            <div class="col-md-3">
                                <div class="text-center p-3 bg-light rounded">
                                    <i class="fas fa-envelope fa-2x text-primary mb-2"></i>
                                    <h6>{{ messages_using_template|default:0 }}</h6>
                                    <small class="text-muted">Messages using template</small>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="text-center p-3 bg-light rounded">
                                    <i class="fas fa-code fa-2x text-info mb-2"></i>
                                    <h6>{{ object.variables.count|default:0 }}</h6>
                                    <small class="text-muted">Template variables</small>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="text-center p-3 bg-light rounded">
                                    <i class="fas fa-language fa-2x text-success mb-2"></i>
                                    <h6>{{ object.languages.count|default:1 }}</h6>
                                    <small class="text-muted">Language versions</small>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="text-center p-3 bg-light rounded">
                                    <i class="fas fa-chart-line fa-2x text-warning mb-2"></i>
                                    <h6>All</h6>
                                    <small class="text-muted">Usage statistics</small>
                                </div>
                            </div>
                        </div>
                    </div>

                    <!-- Alternative Actions -->
                    <div class="mt-4">
                        <h6 class="text-muted mb-3">Consider these alternatives:</h6>
                        <div class="list-group">
                            <div class="list-group-item">
                                <div class="d-flex w-100 justify-content-between">
                                    <h6 class="mb-1">Deactivate Template</h6>
                                    <small>Recommended</small>
                                </div>
                                <p class="mb-1">Keep the template but mark it as inactive so it can't be used for new messages.</p>
                                <button class="btn btn-sm btn-outline-warning" onclick="deactivateTemplate()">
                                    <i class="fas fa-pause me-1"></i>Deactivate Instead
                                </button>
                            </div>
                            
                            <div class="list-group-item">
                                <div class="d-flex w-100 justify-content-between">
                                    <h6 class="mb-1">Archive Template</h6>
                                    <small>Alternative</small>
                                </div>
                                <p class="mb-1">Move the template to archived status for future reference.</p>
                                <button class="btn btn-sm btn-outline-secondary" onclick="archiveTemplate()">
                                    <i class="fas fa-archive me-1"></i>Archive Instead
                                </button>
                            </div>
                            
                            <div class="list-group-item">
                                <div class="d-flex w-100 justify-content-between">
                                    <h6 class="mb-1">Export Template</h6>
                                    <small>Backup</small>
                                </div>
                                <p class="mb-1">Download template data before deletion for your records.</p>
                                <button class="btn btn-sm btn-outline-info" onclick="exportTemplate()">
                                    <i class="fas fa-download me-1"></i>Export First
                                </button>
                            </div>
                            
                            <div class="list-group-item">
                                <div class="d-flex w-100 justify-content-between">
                                    <h6 class="mb-1">Create Copy</h6>
                                    <small>Safe Option</small>
                                </div>
                                <p class="mb-1">Create a duplicate of this template before deletion.</p>
                                <button class="btn btn-sm btn-outline-success" onclick="duplicateTemplate()">
                                    <i class="fas fa-copy me-1"></i>Duplicate First
                                </button>
                            </div>
                        </div>
                    </div>

                    <!-- Dependent Messages Warning -->
                    {% if messages_using_template > 0 %}
                    <div class="mt-4">
                        <div class="alert alert-danger" role="alert">
                            <div class="d-flex">
                                <div class="flex-shrink-0">
                                    <i class="fas fa-exclamation-circle fa-2x"></i>
                                </div>
                                <div class="flex-grow-1 ms-3">
                                    <h6 class="alert-heading">Active Dependencies Found!</h6>
                                    <p class="mb-2">
                                        This template is currently being used by <strong>{{ messages_using_template }}</strong> message(s).
                                        Deleting this template may cause issues with:
                                    </p>
                                    <ul class="mb-0">
                                        <li>Scheduled messages that reference this template</li>
                                        <li>Automated workflows using this template</li>
                                        <li>Message history and audit trails</li>
                                    </ul>
                                </div>
                            </div>
                        </div>
                    </div>
                    {% endif %}

                    <!-- Confirmation Form -->
                    <form method="post" class="mt-4">
                        {% csrf_token %}
                        
                        <!-- Confirmation Checkboxes -->
                        <div class="form-check mb-3">
                            <input class="form-check-input" type="checkbox" id="confirmUnderstand" required>
                            <label class="form-check-label fw-bold text-danger" for="confirmUnderstand">
                                I understand that this action is permanent and cannot be undone
                            </label>
                        </div>

                        {% if messages_using_template > 0 %}
                        <div class="form-check mb-3">
                            <input class="form-check-input" type="checkbox" id="confirmDependencies" required>
                            <label class="form-check-label fw-bold text-danger" for="confirmDependencies">
                                I acknowledge that {{ messages_using_template }} message(s) are using this template and may be affected
                            </label>
                        </div>
                        {% endif %}

                        <!-- Reason for Deletion -->
                        <div class="mb-3">
                            <label for="deletionReason" class="form-label">Reason for deletion (required):</label>
                            <select class="form-select" id="deletionReason" name="deletion_reason" required>
                                <option value="">Select a reason...</option>
                                <option value="duplicate">Duplicate template</option>
                                <option value="outdated">Outdated content</option>
                                <option value="incorrect">Incorrect template</option>
                                <option value="unused">No longer needed</option>
                                <option value="compliance">Compliance requirement</option>
                                <option value="restructure">System restructure</option>
                                <option value="other">Other</option>
                            </select>
                        </div>

                        <!-- Additional Comments -->
                        <div class="mb-4">
                            <label for="deletionComments" class="form-label">Additional comments (optional):</label>
                            <textarea class="form-control" id="deletionComments" name="deletion_comments" rows="3" 
                                      placeholder="Provide additional context for this deletion..."></textarea>
                        </div>

                        <!-- Action Buttons -->
                        <div class="d-flex gap-2 justify-content-end">
                            <a href="{% url 'communications:notification_template_detail' object.pk %}" class="btn btn-secondary">
                                <i class="fas fa-arrow-left me-1"></i>
                                Cancel
                            </a>
                            <a href="{% url 'communications:notification_template_list' %}" class="btn btn-outline-secondary">
                                <i class="fas fa-list me-1"></i>
                                Back to List
                            </a>
                            <button type="submit" class="btn btn-danger" id="deleteButton" disabled>
                                <i class="fas fa-trash me-1"></i>
                                Delete Template Permanently
                            </button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block js %}
<script>
// Enable delete button only when all confirmations are checked
function updateDeleteButton() {
    const confirmUnderstand = document.getElementById('confirmUnderstand').checked;
    const confirmDependencies = document.getElementById('confirmDependencies');
    const dependenciesChecked = !confirmDependencies || confirmDependencies.checked;
    const reasonSelected = document.getElementById('deletionReason').value !== '';
    
    document.getElementById('deleteButton').disabled = !(confirmUnderstand && dependenciesChecked && reasonSelected);
}

document.getElementById('confirmUnderstand').addEventListener('change', updateDeleteButton);
document.getElementById('deletionReason').addEventListener('change', updateDeleteButton);

{% if messages_using_template > 0 %}
document.getElementById('confirmDependencies').addEventListener('change', updateDeleteButton);
{% endif %}

// Alternative action functions
function deactivateTemplate() {
    if (confirm('Deactivate this template instead of deleting it?')) {
        fetch(`{% url 'communications:notification_template_detail' object.pk %}toggle/`, {
            method: 'POST',
            headers: {
                'X-CSRFToken': document.querySelector('[name=csrfmiddlewaretoken]').value,
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({ active: false })
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                window.location.href = '{% url "communications:notification_template_list" %}';
            } else {
                alert('Error deactivating template: ' + data.error);
            }
        });
    }
}

function archiveTemplate() {
    if (confirm('Archive this template instead of deleting it?')) {
        fetch(`{% url 'communications:notification_template_detail' object.pk %}archive/`, {
            method: 'POST',
            headers: {
                'X-CSRFToken': document.querySelector('[name=csrfmiddlewaretoken]').value,
                'Content-Type': 'application/json',
            }
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                window.location.href = '{% url "communications:notification_template_list" %}';
            } else {
                alert('Error archiving template: ' + data.error);
            }
        });
    }
}

function exportTemplate() {
    window.open(`{% url 'communications:notification_template_detail' object.pk %}export/`, '_blank');
}

function duplicateTemplate() {
    if (confirm('Create a copy of this template before deletion?')) {
        window.location.href = '{% url "communications:notification_template_create" %}?duplicate={{ object.id }}';
    }
}

// Form submission with additional validation
document.querySelector('form').addEventListener('submit', function(e) {
    const reason = document.getElementById('deletionReason').value;
    
    if (!reason) {
        e.preventDefault();
        alert('Please select a reason for deletion.');
        return;
    }
    
    const finalConfirm = confirm(
        'FINAL CONFIRMATION:\n\n' +
        'Are you absolutely sure you want to delete this template?\n\n' +
        'Template: {{ object.template_name|escapejs }}\n' +
        'Category: {{ object.get_category_display|escapejs }}\n' +
        {% if messages_using_template > 0 %}'Messages affected: {{ messages_using_template }}\n' +{% endif %}
        '\nThis action CANNOT be undone!'
    );
    
    if (!finalConfirm) {
        e.preventDefault();
    }
});
</script>
{% endblock %}