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

{% block title %}Delete Metric Definition - Hospital Management{% endblock %}

{% block content %}
<div class="content">
    <div class="container-fluid">
        <!-- Page Header -->
        <div class="row">
            <div class="col-12">
                <div class="page-header">
                    <div class="page-title">
                        <h4>Delete Metric Definition</h4>
                        <h6>Confirm metric definition deletion</h6>
                    </div>
                    <div class="page-btn">
                        <a href="{% url 'analytics:metric_definition_detail' metric.pk %}" class="btn btn-secondary">
                            <i class="fas fa-arrow-left me-1"></i>Back to Metric
                        </a>
                    </div>
                </div>
            </div>
        </div>

        <div class="row justify-content-center">
            <div class="col-lg-8">
                <!-- Warning Alert -->
                <div class="alert alert-warning alert-dismissible fade show" role="alert">
                    <div class="d-flex align-items-center">
                        <i class="fas fa-exclamation-triangle fa-2x me-3"></i>
                        <div>
                            <h5 class="alert-heading mb-1">Confirm Metric Definition Deletion</h5>
                            <p class="mb-0">This action will permanently remove the metric definition and all associated data. This cannot be undone.</p>
                        </div>
                    </div>
                </div>

                <!-- Metric Information -->
                <div class="card">
                    <div class="card-header bg-warning text-dark">
                        <h5 class="card-title mb-0">
                            <i class="fas fa-chart-line me-2"></i>Metric Definition to be Deleted
                        </h5>
                    </div>
                    <div class="card-body">
                        <div class="row">
                            <div class="col-md-8">
                                <div class="metric-info">
                                    <h4 class="text-warning">{{ metric.name }}</h4>
                                    <p class="text-muted mb-3">{{ metric.description|default:"No description provided" }}</p>
                                    
                                    <div class="row">
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Category:</label>
                                                <span class="badge bg-primary">{{ metric.get_category_display }}</span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Type:</label>
                                                <span class="badge bg-info">{{ metric.get_metric_type_display }}</span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Status:</label>
                                                {% if metric.status == 'active' %}
                                                    <span class="badge bg-success">Active</span>
                                                {% elif metric.status == 'inactive' %}
                                                    <span class="badge bg-secondary">Inactive</span>
                                                {% else %}
                                                    <span class="badge bg-warning">Draft</span>
                                                {% endif %}
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Unit:</label>
                                                <span class="text-muted">{{ metric.unit|default:"N/A" }}</span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Data Source:</label>
                                                <span class="text-muted">{{ metric.data_source.name|default:"N/A" }}</span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Last Calculated:</label>
                                                <span class="text-muted">
                                                    {% if metric.last_calculated %}
                                                        {{ metric.last_calculated|timesince }} ago
                                                    {% else %}
                                                        Never
                                                    {% endif %}
                                                </span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Created By:</label>
                                                <span class="text-muted">{{ metric.created_by|default:"System" }}</span>
                                            </div>
                                        </div>
                                        <div class="col-sm-6">
                                            <div class="info-item">
                                                <label class="form-label">Created Date:</label>
                                                <span class="text-muted">{{ metric.created_at|date:"M d, Y" }}</span>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-4">
                                <div class="metric-preview-card">
                                    <div class="preview-header">
                                        <div class="metric-icon">
                                            {% if metric.category == 'clinical' %}
                                                <i class="fas fa-heartbeat fa-2x text-danger"></i>
                                            {% elif metric.category == 'financial' %}
                                                <i class="fas fa-dollar-sign fa-2x text-success"></i>
                                            {% elif metric.category == 'operational' %}
                                                <i class="fas fa-cogs fa-2x text-primary"></i>
                                            {% elif metric.category == 'quality' %}
                                                <i class="fas fa-star fa-2x text-warning"></i>
                                            {% else %}
                                                <i class="fas fa-chart-line fa-2x text-info"></i>
                                            {% endif %}
                                        </div>
                                        <h6>{{ metric.get_category_display }}</h6>
                                    </div>
                                    <div class="preview-stats">
                                        <div class="stat-item">
                                            <span class="stat-value">{{ metric.calculation_count|default:"0" }}</span>
                                            <span class="stat-label">Calculations</span>
                                        </div>
                                        <div class="stat-item">
                                            <span class="stat-value">{{ metric.widget_count|default:"0" }}</span>
                                            <span class="stat-label">Widgets</span>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Impact Analysis -->
                <div class="card">
                    <div class="card-header">
                        <h5 class="card-title">
                            <i class="fas fa-chart-line me-2"></i>Deletion Impact
                        </h5>
                    </div>
                    <div class="card-body">
                        <div class="row">
                            <div class="col-md-6">
                                <h6 class="text-warning">What will be deleted:</h6>
                                <ul class="list-group list-group-flush">
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-chart-line text-warning me-2"></i>
                                            Metric definition
                                        </div>
                                        <span class="badge bg-warning rounded-pill">1</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-code text-warning me-2"></i>
                                            Formula and configuration
                                        </div>
                                        <span class="badge bg-warning rounded-pill">1</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-history text-warning me-2"></i>
                                            Calculation history
                                        </div>
                                        <span class="badge bg-warning rounded-pill">{{ metric.calculation_count|default:"0" }}</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-chart-bar text-warning me-2"></i>
                                            Associated widgets
                                        </div>
                                        <span class="badge bg-warning rounded-pill">{{ metric.widget_count|default:"0" }}</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-sliders-h text-warning me-2"></i>
                                            Parameters and settings
                                        </div>
                                        <span class="badge bg-warning rounded-pill">{{ metric.parameters_count|default:"0" }}</span>
                                    </li>
                                </ul>
                            </div>
                            <div class="col-md-6">
                                <h6 class="text-info">What will remain:</h6>
                                <ul class="list-group list-group-flush">
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-database text-success me-2"></i>
                                            Original data sources
                                        </div>
                                        <span class="badge bg-success rounded-pill">Safe</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-tachometer-alt text-success me-2"></i>
                                            Other dashboards
                                        </div>
                                        <span class="badge bg-success rounded-pill">Safe</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-chart-line text-success me-2"></i>
                                            Other metrics
                                        </div>
                                        <span class="badge bg-success rounded-pill">Safe</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-users text-success me-2"></i>
                                            User accounts
                                        </div>
                                        <span class="badge bg-success rounded-pill">Safe</span>
                                    </li>
                                    <li class="list-group-item d-flex justify-content-between align-items-center">
                                        <div>
                                            <i class="fas fa-cog text-success me-2"></i>
                                            System settings
                                        </div>
                                        <span class="badge bg-success rounded-pill">Safe</span>
                                    </li>
                                </ul>
                            </div>
                        </div>

                        {% if metric.widget_count > 0 %}
                        <div class="alert alert-danger mt-3">
                            <i class="fas fa-exclamation-triangle me-2"></i>
                            <strong>Warning:</strong> This metric is used by {{ metric.widget_count }} widget{{ metric.widget_count|pluralize }}. 
                            Deleting it will break these widgets and they will need to be reconfigured.
                        </div>
                        {% endif %}

                        {% if metric.status == 'active' %}
                        <div class="alert alert-warning mt-3">
                            <i class="fas fa-exclamation-triangle me-2"></i>
                            <strong>Notice:</strong> This metric is currently active and may be used in automated calculations. 
                            Consider deactivating it first before deletion.
                        </div>
                        {% endif %}
                    </div>
                </div>

                <!-- Formula Preview -->
                {% if metric.formula %}
                <div class="card">
                    <div class="card-header">
                        <h5 class="card-title">
                            <i class="fas fa-code me-2"></i>Formula to be Lost
                        </h5>
                    </div>
                    <div class="card-body">
                        <div class="formula-preview">
                            <pre class="bg-light p-3 rounded"><code>{{ metric.formula }}</code></pre>
                        </div>
                        <div class="alert alert-info mt-3">
                            <i class="fas fa-info-circle me-2"></i>
                            This formula will be permanently lost. Consider backing up the configuration before deletion.
                        </div>
                    </div>
                </div>
                {% endif %}

                <!-- Alternative Actions -->
                <div class="card">
                    <div class="card-header">
                        <h5 class="card-title">
                            <i class="fas fa-lightbulb me-2"></i>Alternative Actions
                        </h5>
                    </div>
                    <div class="card-body">
                        <p class="text-muted mb-3">Consider these alternatives before deleting the metric definition:</p>
                        
                        <div class="row">
                            <div class="col-md-6">
                                <div class="alternative-action">
                                    <div class="action-icon">
                                        <i class="fas fa-pause text-warning"></i>
                                    </div>
                                    <div class="action-content">
                                        <h6>Deactivate Metric</h6>
                                        <p class="text-muted">Temporarily disable without deleting data.</p>
                                        <button type="button" class="btn btn-outline-warning btn-sm" onclick="deactivateMetric()">
                                            <i class="fas fa-pause me-1"></i>Deactivate Instead
                                        </button>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="alternative-action">
                                    <div class="action-icon">
                                        <i class="fas fa-download text-info"></i>
                                    </div>
                                    <div class="action-content">
                                        <h6>Export Configuration</h6>
                                        <p class="text-muted">Download metric configuration for backup.</p>
                                        <button type="button" class="btn btn-outline-info btn-sm" onclick="exportConfig()">
                                            <i class="fas fa-download me-1"></i>Export First
                                        </button>
                                    </div>
                                </div>
                            </div>
                        </div>
                        
                        <div class="row mt-3">
                            <div class="col-md-6">
                                <div class="alternative-action">
                                    <div class="action-icon">
                                        <i class="fas fa-copy text-success"></i>
                                    </div>
                                    <div class="action-content">
                                        <h6>Duplicate Metric</h6>
                                        <p class="text-muted">Create a copy before deletion.</p>
                                        <button type="button" class="btn btn-outline-success btn-sm" onclick="duplicateMetric()">
                                            <i class="fas fa-copy me-1"></i>Duplicate First
                                        </button>
                                    </div>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="alternative-action">
                                    <div class="action-icon">
                                        <i class="fas fa-edit text-primary"></i>
                                    </div>
                                    <div class="action-content">
                                        <h6>Edit Metric</h6>
                                        <p class="text-muted">Modify instead of deleting.</p>
                                        <a href="{% url 'analytics:metric_definition_update' metric.pk %}" class="btn btn-outline-primary btn-sm">
                                            <i class="fas fa-edit me-1"></i>Edit Instead
                                        </a>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Confirmation Form -->
                <div class="card border-warning">
                    <div class="card-header bg-warning text-dark">
                        <h5 class="card-title mb-0">
                            <i class="fas fa-exclamation-triangle me-2"></i>Confirm Deletion
                        </h5>
                    </div>
                    <div class="card-body">
                        <form method="post" id="deleteForm">
                            {% csrf_token %}
                            
                            <div class="form-group">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="confirmUnderstand" name="confirm_understand" required>
                                    <label class="form-check-label" for="confirmUnderstand">
                                        I understand that this metric definition and all associated data will be permanently deleted.
                                    </label>
                                </div>
                            </div>

                            {% if metric.widget_count > 0 %}
                            <div class="form-group">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="confirmWidgets" name="confirm_widgets" required>
                                    <label class="form-check-label" for="confirmWidgets">
                                        I understand that {{ metric.widget_count }} widget{{ metric.widget_count|pluralize }} will be affected and may stop working.
                                    </label>
                                </div>
                            </div>
                            {% endif %}

                            {% if metric.status == 'active' %}
                            <div class="form-group">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="confirmActive" name="confirm_active" required>
                                    <label class="form-check-label" for="confirmActive">
                                        I understand that this is an active metric and automated calculations may be affected.
                                    </label>
                                </div>
                            </div>
                            {% endif %}

                            <div class="form-group">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="confirmBackup" name="confirm_backup">
                                    <label class="form-check-label" for="confirmBackup">
                                        I have considered backing up the metric configuration.
                                    </label>
                                </div>
                            </div>

                            <div class="form-group">
                                <label for="deletionReason" class="form-label">Reason for Deletion (Optional):</label>
                                <select class="form-select" id="deletionReason" name="deletion_reason">
                                    <option value="">Select a reason</option>
                                    <option value="outdated">Metric is outdated</option>
                                    <option value="duplicate">Duplicate metric</option>
                                    <option value="not_needed">No longer needed</option>
                                    <option value="incorrect">Incorrect calculation</option>
                                    <option value="replaced">Replaced by new metric</option>
                                    <option value="other">Other reason</option>
                                </select>
                            </div>

                            <div class="form-group" id="otherReasonGroup" style="display: none;">
                                <label for="otherReason" class="form-label">Please specify:</label>
                                <textarea class="form-control" id="otherReason" name="other_reason" rows="2" 
                                          placeholder="Please provide more details..."></textarea>
                            </div>

                            <div class="d-flex justify-content-between align-items-center mt-4">
                                <div class="deletion-actions">
                                    <a href="{% url 'analytics:metric_definition_detail' metric.pk %}" class="btn btn-secondary me-2">
                                        <i class="fas fa-times me-1"></i>Cancel
                                    </a>
                                    <a href="{% url 'analytics:metric_definition_list' %}" class="btn btn-outline-secondary">
                                        <i class="fas fa-list me-1"></i>Back to Metrics
                                    </a>
                                </div>
                                <button type="submit" class="btn btn-warning" id="deleteButton" disabled>
                                    <i class="fas fa-trash me-1"></i>Delete Metric
                                </button>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const confirmUnderstand = document.getElementById('confirmUnderstand');
    const confirmWidgets = document.getElementById('confirmWidgets');
    const confirmActive = document.getElementById('confirmActive');
    const deleteButton = document.getElementById('deleteButton');
    const deleteForm = document.getElementById('deleteForm');
    const deletionReason = document.getElementById('deletionReason');
    const otherReasonGroup = document.getElementById('otherReasonGroup');

    // Enable/disable delete button based on confirmations
    function updateDeleteButton() {
        const understandChecked = confirmUnderstand.checked;
        const widgetsChecked = confirmWidgets ? confirmWidgets.checked : true;
        const activeChecked = confirmActive ? confirmActive.checked : true;
        
        deleteButton.disabled = !(understandChecked && widgetsChecked && activeChecked);
    }

    confirmUnderstand.addEventListener('change', updateDeleteButton);
    if (confirmWidgets) {
        confirmWidgets.addEventListener('change', updateDeleteButton);
    }
    if (confirmActive) {
        confirmActive.addEventListener('change', updateDeleteButton);
    }

    // Show/hide other reason field
    deletionReason.addEventListener('change', function() {
        if (this.value === 'other') {
            otherReasonGroup.style.display = 'block';
        } else {
            otherReasonGroup.style.display = 'none';
        }
    });

    // Form submission with confirmation
    deleteForm.addEventListener('submit', function(e) {
        e.preventDefault();
        
        const finalConfirm = confirm(
            'Are you absolutely sure you want to delete this metric definition?\n\n' +
            'This action cannot be undone and will permanently remove:\n' +
            '- Metric definition and formula\n' +
            '- All calculation history\n' +
            '- Associated widgets\n' +
            '- Parameters and settings\n\n' +
            'Click OK to proceed or Cancel to abort.'
        );
        
        if (finalConfirm) {
            // Show loading state
            deleteButton.innerHTML = '<i class="fas fa-spinner fa-spin me-1"></i>Deleting...';
            deleteButton.disabled = true;
            
            // Simulate deletion process
            setTimeout(() => {
                alert('Metric definition deleted successfully!');
                window.location.href = "{% url 'analytics:metric_definition_list' %}";
            }, 2000);
        }
    });
});

function deactivateMetric() {
    if (confirm('Deactivate this metric instead of deleting it?')) {
        alert('Metric deactivated successfully! You can reactivate it later.');
        window.location.href = "{% url 'analytics:metric_definition_list' %}";
    }
}

function exportConfig() {
    if (confirm('Export metric configuration before deletion?')) {
        alert('Configuration export started! You will receive a download link when ready.');
    }
}

function duplicateMetric() {
    if (confirm('Create a copy of this metric before deletion?')) {
        alert('Metric duplicated successfully!');
    }
}
</script>

<style>
.info-item {
    margin-bottom: 15px;
}

.info-item label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
    color: #2c3e50;
}

.metric-preview-card {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    background: white;
    overflow: hidden;
    height: 100%;
}

.preview-header {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
}

.metric-icon {
    margin-bottom: 10px;
}

.preview-header h6 {
    margin: 0;
    font-weight: 600;
    color: #2c3e50;
}

.preview-stats {
    padding: 20px;
    display: flex;
    justify-content: space-around;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.875rem;
    color: #6c757d;
}

.alternative-action {
    display: flex;
    align-items: flex-start;
    padding: 20px;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    background: #f8f9fa;
    margin-bottom: 15px;
    height: 100%;
}

.action-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.action-content {
    flex: 1;
}

.action-content h6 {
    margin: 0 0 8px 0;
    font-weight: 600;
    color: #2c3e50;
}

.action-content p {
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.formula-preview pre {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.4;
}

.deletion-actions {
    display: flex;
    align-items: center;
}

#deleteButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .metric-preview-card {
        margin-top: 20px;
    }
    
    .alternative-action {
        flex-direction: column;
        text-align: center;
    }
    
    .action-icon {
        margin-right: 0;
        margin-bottom: 15px;
        align-self: center;
    }
    
    .deletion-actions {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }
    
    .deletion-actions .btn {
        width: 100%;
    }
    
    #deleteButton {
        width: 100%;
        margin-top: 15px;
    }
    
    .preview-stats {
        flex-direction: column;
        gap: 15px;
    }
}
</style>
{% endblock %}