package app

import "fmt"
import "strings"
import "github.com/seaweedfs/seaweedfs/weed/admin/dash"

templ Topics(data dash.TopicsData) {
    <div class="container-fluid">
        <div class="row">
            <div class="col-12">
                <div class="d-flex justify-content-between align-items-center mb-4">
                    <h1 class="h3 mb-0">Message Queue Topics</h1>
                    <small class="text-muted">Last updated: {data.LastUpdated.Format("2006-01-02 15:04:05")}</small>
                </div>

                <!-- Summary Cards -->
                <div class="row mb-4">
                    <div class="col-md-6">
                        <div class="card text-center">
                            <div class="card-body">
                                <h5 class="card-title">Total Topics</h5>
                                <h3 class="text-primary">{fmt.Sprintf("%d", data.TotalTopics)}</h3>
                            </div>
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="card text-center">
                            <div class="card-body">
                                <h5 class="card-title">Available Topics</h5>
                                <h3 class="text-info">{fmt.Sprintf("%d", len(data.Topics))}</h3>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Topics Table -->
                <div class="card">
                    <div class="card-header d-flex justify-content-between align-items-center">
                        <h5 class="mb-0">Topics</h5>
                        <div>
                            <button class="btn btn-sm btn-primary me-2" onclick="showCreateTopicModal()">
                                <i class="fas fa-plus me-1"></i>Create Topic
                            </button>
                            <button class="btn btn-sm btn-outline-secondary" onclick="exportTopicsCSV()">
                                <i class="fas fa-download me-1"></i>Export CSV
                            </button>
                        </div>
                    </div>
                    <div class="card-body">
                        if len(data.Topics) == 0 {
                            <div class="text-center py-4">
                                <i class="fas fa-list-alt fa-3x text-muted mb-3"></i>
                                <h5>No Topics Found</h5>
                                <p class="text-muted">No message queue topics are currently configured.</p>
                            </div>
                        } else {
                            <div class="table-responsive">
                                <table class="table table-striped" id="topicsTable">
                                    <thead>
                                        <tr>
                                            <th>Namespace</th>
                                            <th>Topic Name</th>
                                            <th>Partitions</th>
                                            <th>Retention</th>
                                            <th>Actions</th>
                                        </tr>
                                    </thead>
                                    <tbody>
                                        for _, topic := range data.Topics {
                                            <tr class="topic-row" data-topic-name={topic.Name} style="cursor: pointer;">
                                                <td>
                                                    <span class="badge bg-secondary">{func() string {
                                                        idx := strings.LastIndex(topic.Name, ".")
                                                        if idx == -1 {
                                                            return "default"
                                                        }
                                                        return topic.Name[:idx]
                                                    }()}</span>
                                                </td>
                                                <td>
                                                    <strong>{func() string {
                                                        idx := strings.LastIndex(topic.Name, ".")
                                                        if idx == -1 {
                                                            return topic.Name
                                                        }
                                                        return topic.Name[idx+1:]
                                                    }()}</strong>
                                                </td>
                                                <td>
                                                    <span class="badge bg-info">{fmt.Sprintf("%d", topic.Partitions)}</span>
                                                </td>
                                                <td>
                                                    if topic.Retention.Enabled {
                                                        <span class="badge bg-success">
                                                            <i class="fas fa-clock me-1"></i>
                                                            {fmt.Sprintf("%d %s", topic.Retention.DisplayValue, topic.Retention.DisplayUnit)}
                                                        </span>
                                                    } else {
                                                        <span class="badge bg-secondary">
                                                            <i class="fas fa-times me-1"></i>Disabled
                                                        </span>
                                                    }
                                                </td>
                                                <td>
                                                    <button class="btn btn-sm btn-outline-primary" data-action="view-topic-details" data-topic-name={ topic.Name }>
                                                        <i class="fas fa-eye"></i>
                                                    </button>
                                                </td>
                                            </tr>
                                            <tr class="topic-details-row" id={ fmt.Sprintf("details-%s", strings.ReplaceAll(topic.Name, ".", "_")) } style="display: none;">
                                                <td colspan="5">
                                                    <div class="topic-details-content">
                                                        <div class="text-center py-3">
                                                            <i class="fas fa-spinner fa-spin"></i> Loading topic details...
                                                        </div>
                                                    </div>
                                                </td>
                                            </tr>
                                        }
                                    </tbody>
                                </table>
                            </div>
                        }
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Create Topic Modal -->
    <div class="modal fade" id="createTopicModal" tabindex="-1" role="dialog">
        <div class="modal-dialog modal-lg" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">
                        <i class="fas fa-plus me-2"></i>Create New Topic
                    </h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="createTopicForm">
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label for="topicNamespace" class="form-label">Namespace *</label>
                                    <input type="text" class="form-control" id="topicNamespace" name="namespace" required 
                                           placeholder="e.g., default">
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label for="topicName" class="form-label">Topic Name *</label>
                                    <input type="text" class="form-control" id="topicName" name="name" required 
                                           placeholder="e.g., user-events">
                                </div>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-6">
                                <div class="mb-3">
                                    <label for="partitionCount" class="form-label">Partition Count *</label>
                                    <input type="number" class="form-control" id="partitionCount" name="partitionCount" 
                                           required min="1" max="100" value="6">
                                </div>
                            </div>
                        </div>
                        
                        <!-- Retention Configuration -->
                        <div class="card mt-3">
                            <div class="card-header">
                                <h6 class="mb-0">
                                    <i class="fas fa-clock me-2"></i>Retention Policy
                                </h6>
                            </div>
                            <div class="card-body">
                                <div class="form-check mb-3">
                                    <input class="form-check-input" type="checkbox" id="enableRetention" 
                                           name="enableRetention" onchange="toggleRetentionFields()">
                                    <label class="form-check-label" for="enableRetention">
                                        Enable data retention
                                    </label>
                                </div>
                                <div id="retentionFields" style="display: none;">
                                    <div class="row">
                                        <div class="col-md-6">
                                            <div class="mb-3">
                                                <label for="retentionValue" class="form-label">Retention Duration</label>
                                                <input type="number" class="form-control" id="retentionValue" 
                                                       name="retentionValue" min="1" value="7">
                                            </div>
                                        </div>
                                        <div class="col-md-6">
                                            <div class="mb-3">
                                                <label for="retentionUnit" class="form-label">Unit</label>
                                                <select class="form-control" id="retentionUnit" name="retentionUnit">
                                                    <option value="hours">Hours</option>
                                                    <option value="days" selected>Days</option>
                                                </select>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="alert alert-info">
                                        <i class="fas fa-info-circle me-2"></i>
                                        Data older than this duration will be automatically purged to save storage space.
                                    </div>
                                </div>
                            </div>
                        </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="createTopic()">
                        <i class="fas fa-plus me-1"></i>Create Topic
                    </button>
                </div>
            </div>
        </div>
    </div>

    <script type="text/javascript">
        // Topic management functions
        function showCreateTopicModal() {
            var modal = new bootstrap.Modal(document.getElementById('createTopicModal'));
            modal.show();
        }

        function toggleRetentionFields() {
            var enableRetention = document.getElementById('enableRetention').checked;
            var retentionFields = document.getElementById('retentionFields');
            
            if (enableRetention) {
                retentionFields.style.display = 'block';
            } else {
                retentionFields.style.display = 'none';
            }
        }

        function createTopic() {
            var form = document.getElementById('createTopicForm');
            var formData = new FormData(form);
            
            if (!form.checkValidity()) {
                form.classList.add('was-validated');
                return;
            }
            
            var namespace = formData.get('namespace');
            var name = formData.get('name');
            var partitionCount = formData.get('partitionCount');
            var enableRetention = formData.get('enableRetention');
            var retentionValue = enableRetention === 'on' ? parseInt(formData.get('retentionValue')) : 0;
            var retentionUnit = enableRetention === 'on' ? formData.get('retentionUnit') : 'hours';
            
            // Convert retention to seconds
            var retentionSeconds = 0;
            if (enableRetention === 'on' && retentionValue > 0) {
                if (retentionUnit === 'hours') {
                    retentionSeconds = retentionValue * 3600;
                } else if (retentionUnit === 'days') {
                    retentionSeconds = retentionValue * 86400;
                }
            }
            
            var topicData = {
                namespace: namespace,
                name: name,
                partition_count: parseInt(partitionCount),
                retention: {
                    enabled: enableRetention === 'on',
                    retention_seconds: retentionSeconds
                }
            };
            
            // Create the topic
            fetch('/api/mq/topics/create', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify(topicData)
            })
            .then(response => {
                if (response.ok) {
                    return response.json();
                }
                throw new Error('Failed to create topic');
            })
            .then(data => {
                // Hide modal and refresh page
                var modal = bootstrap.Modal.getInstance(document.getElementById('createTopicModal'));
                modal.hide();
                location.reload();
            })
            .catch(error => {
                console.error('Error:', error);
                alert('Error creating topic: ' + error.message);
            });
        }

        function exportTopicsCSV() {
            var csvContent = 'Namespace,Topic Name,Partitions,Retention Enabled,Retention Value,Retention Unit\n';
            
            var rows = document.querySelectorAll('#topicsTable tbody tr.topic-row');
            rows.forEach(function(row) {
                var cells = row.querySelectorAll('td');
                var namespace = cells[0].textContent.trim();
                var topicName = cells[1].textContent.trim();
                var partitions = cells[2].textContent.trim();
                var retention = cells[3].textContent.trim();
                
                var retentionEnabled = retention !== 'Disabled';
                var retentionValue = retentionEnabled ? retention.split(' ')[0] : '';
                var retentionUnit = retentionEnabled ? retention.split(' ')[1] : '';
                
                csvContent += namespace + ',' + topicName + ',' + partitions + ',' + retentionEnabled + ',' + retentionValue + ',' + retentionUnit + '\n';
            });
            
            var blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
            var link = document.createElement('a');
            var url = URL.createObjectURL(blob);
            link.setAttribute('href', url);
            link.setAttribute('download', 'topics_export.csv');
            link.style.visibility = 'hidden';
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        }

        // Topic details functionality
        document.addEventListener('DOMContentLoaded', function() {
            // Handle view topic details buttons
            document.querySelectorAll('[data-action="view-topic-details"]').forEach(function(button) {
                button.addEventListener('click', function(e) {
                    e.stopPropagation();
                    var topicName = this.getAttribute('data-topic-name');
                    var detailsRow = document.getElementById('details-' + topicName.replace(/\./g, '_'));
                    
                    if (detailsRow.style.display === 'none') {
                        detailsRow.style.display = 'table-row';
                        this.innerHTML = '<i class="fas fa-eye-slash"></i>';
                        
                        // Load topic details
                        loadTopicDetails(topicName);
                    } else {
                        detailsRow.style.display = 'none';
                        this.innerHTML = '<i class="fas fa-eye"></i>';
                    }
                });
            });
        });

        function loadTopicDetails(topicName) {
            var detailsRow = document.getElementById('details-' + topicName.replace(/\./g, '_'));
            var contentDiv = detailsRow.querySelector('.topic-details-content');
            
            fetch('/admin/topics/' + encodeURIComponent(topicName) + '/details')
                .then(response => response.json())
                .then(data => {
                    var html = '<div class="row">';
                    html += '<div class="col-md-6">';
                    html += '<h6>Topic Configuration</h6>';
                    html += '<ul class="list-unstyled">';
                    html += '<li><strong>Full Name:</strong> ' + data.name + '</li>';
                    html += '<li><strong>Partitions:</strong> ' + data.partitions + '</li>';
                    html += '<li><strong>Created:</strong> ' + (data.created || 'N/A') + '</li>';
                    html += '</ul>';
                    html += '</div>';
                    html += '<div class="col-md-6">';
                    html += '<h6>Retention Policy</h6>';
                    if (data.retention && data.retention.enabled) {
                        html += '<p><i class="fas fa-check-circle text-success"></i> Enabled</p>';
                        html += '<p><strong>Duration:</strong> ' + data.retention.value + ' ' + data.retention.unit + '</p>';
                    } else {
                        html += '<p><i class="fas fa-times-circle text-danger"></i> Disabled</p>';
                    }
                    html += '</div>';
                    html += '</div>';
                    
                    contentDiv.innerHTML = html;
                })
                .catch(error => {
                    console.error('Error loading topic details:', error);
                    contentDiv.innerHTML = '<div class="alert alert-danger">Failed to load topic details</div>';
                });
        }
    </script>
}