/**
 * Medical Datasets Manager JavaScript
 * Handles medical datasets functionality
 */

class MedicalDatasetsManager {
    constructor() {
        this.datasets = [];
        this.loadedDatasets = new Set();
        this.systemInfo = {};
        this.init();
    }

    init() {
        this.loadDatasets();
        this.loadSystemInfo();
        this.setupEventListeners();
        this.setupDatabaseManagement();

        // Refresh system info every 30 seconds
        setInterval(() => this.loadSystemInfo(), 30000);
    }

    setupEventListeners() {
        // Dataset loading modal events
        document.getElementById('load-dataset-btn').addEventListener('click', () => {
            this.loadSelectedDataset();
        });
    }

    async loadDatasets() {
        try {
            const response = await fetch('/api/medical-datasets');
            const data = await response.json();
            
            if (response.ok) {
                this.datasets = data.datasets;
                this.renderDatasets();
            } else {
                this.showError('فشل في تحميل قواعد البيانات');
            }
        } catch (error) {
            console.error('Error loading datasets:', error);
            this.showError('خطأ في الاتصال بالخادم');
        }
    }

    async loadSystemInfo() {
        try {
            const response = await fetch('/api/system/performance');
            const data = await response.json();
            
            if (response.ok) {
                this.systemInfo = data;
                this.updateSystemInfo();
            }
        } catch (error) {
            console.error('Error loading system info:', error);
        }
    }

    updateSystemInfo() {
        const memoryElement = document.getElementById('memory-usage');
        const cpuElement = document.getElementById('cpu-cores');
        const datasetsElement = document.getElementById('loaded-datasets');
        const tokenElement = document.getElementById('active-token');

        if (this.systemInfo.memory) {
            const memoryPercent = this.systemInfo.memory.process_memory_percent || 0;
            memoryElement.textContent = `${memoryPercent.toFixed(1)}%`;

            // Update color based on usage
            memoryElement.className = memoryPercent > 80 ? 'h5 text-danger' :
                                     memoryPercent > 60 ? 'h5 text-warning' : 'h5 text-primary';
        }

        if (this.systemInfo.cpu_cores) {
            cpuElement.textContent = `${this.systemInfo.cpu_cores} نواة`;
        }

        datasetsElement.textContent = this.loadedDatasets.size;

        // Update token information
        this.updateTokenInfo();
    }

    async updateTokenInfo() {
        try {
            const response = await fetch('/api/tokens/for-task/medical');
            if (response.ok) {
                const data = await response.json();
                const tokenElement = document.getElementById('active-token');

                if (data.success) {
                    tokenElement.textContent = data.token_info.type_name;
                    tokenElement.className = 'h6 text-success';
                    tokenElement.title = `${data.token_info.description} - مستوى الأمان: ${data.token_info.security_level}`;
                } else {
                    tokenElement.textContent = 'غير متوفر';
                    tokenElement.className = 'h6 text-danger';
                }
            }
        } catch (error) {
            console.error('Error getting token info:', error);
            const tokenElement = document.getElementById('active-token');
            tokenElement.textContent = 'خطأ';
            tokenElement.className = 'h6 text-warning';
        }
    }

    renderDatasets() {
        const container = document.getElementById('datasets-grid');
        
        if (this.datasets.length === 0) {
            container.innerHTML = `
                <div class="col-12 text-center text-muted py-5">
                    <i class="fas fa-database fa-4x mb-3"></i>
                    <h4>لا توجد قواعد بيانات متاحة</h4>
                    <p>تحقق من الاتصال بالإنترنت أو إعدادات الرموز المميزة</p>
                </div>
            `;
            return;
        }

        const datasetsHtml = this.datasets.map(dataset => this.renderDatasetCard(dataset)).join('');
        container.innerHTML = `<div class="row">${datasetsHtml}</div>`;
    }

    renderDatasetCard(dataset) {
        const modalitiesBadges = dataset.modalities.map(modality => 
            `<span class="modality-badge badge bg-primary">${this.getModalityText(modality)}</span>`
        ).join('');

        const specialtiesBadges = dataset.medical_specialties.map(specialty => 
            `<span class="specialty-badge">${this.getSpecialtyText(specialty)}</span>`
        ).join('');

        const languageFlags = dataset.languages.map(lang => 
            `<span class="badge bg-secondary me-1">${this.getLanguageText(lang)}</span>`
        ).join('');

        const isLoaded = this.loadedDatasets.has(dataset.key);
        const statusClass = isLoaded ? 'status-loaded' : 'status-available';
        const statusText = isLoaded ? 'محمل' : 'متاح';

        return `
            <div class="col-lg-6 col-xl-4">
                <div class="dataset-card position-relative">
                    <div class="dataset-status ${statusClass}">${statusText}</div>
                    
                    <div class="text-center">
                        <i class="fas ${this.getDatasetIcon(dataset.modalities)} medical-icon"></i>
                        <h5 class="mb-2">${dataset.name}</h5>
                        <p class="text-muted mb-3">${dataset.description}</p>
                    </div>

                    <div class="mb-3">
                        <div class="d-flex justify-content-between align-items-center mb-2">
                            <span class="size-indicator">
                                <i class="fas fa-hdd me-1"></i>
                                ${dataset.size_gb} جيجابايت
                            </span>
                            <span class="samples-indicator">
                                <i class="fas fa-images me-1"></i>
                                ${this.formatNumber(dataset.num_samples)} عينة
                            </span>
                        </div>
                    </div>

                    <div class="mb-3">
                        <h6 class="mb-2">الوسائط:</h6>
                        <div>${modalitiesBadges}</div>
                    </div>

                    <div class="mb-3">
                        <h6 class="mb-2">التخصصات الطبية:</h6>
                        <div>${specialtiesBadges}</div>
                    </div>

                    <div class="mb-3">
                        <h6 class="mb-2">اللغات:</h6>
                        <div>${languageFlags}</div>
                    </div>

                    <div class="dataset-actions">
                        <button class="btn btn-outline-info btn-sm flex-fill" 
                                onclick="medicalDatasets.showDatasetDetails('${dataset.key}')">
                            <i class="fas fa-info-circle me-1"></i>
                            التفاصيل
                        </button>
                        ${!isLoaded ? `
                            <button class="btn btn-primary btn-sm flex-fill" 
                                    onclick="medicalDatasets.loadDataset('${dataset.key}')">
                                <i class="fas fa-download me-1"></i>
                                تحميل
                            </button>
                        ` : `
                            <button class="btn btn-success btn-sm flex-fill" disabled>
                                <i class="fas fa-check me-1"></i>
                                محمل
                            </button>
                        `}
                    </div>
                </div>
            </div>
        `;
    }

    getDatasetIcon(modalities) {
        if (modalities.includes('radiology') || modalities.includes('ct_scan')) {
            return 'fa-x-ray';
        } else if (modalities.includes('multimodal')) {
            return 'fa-layer-group';
        } else if (modalities.includes('imaging')) {
            return 'fa-image';
        }
        return 'fa-database';
    }

    getModalityText(modality) {
        const modalityTexts = {
            'radiology': 'أشعة',
            'ct_scan': 'أشعة مقطعية',
            'text': 'نص',
            'multimodal': 'متعدد الوسائط',
            'imaging': 'تصوير طبي',
            'vision': 'رؤية حاسوبية'
        };
        return modalityTexts[modality] || modality;
    }

    getSpecialtyText(specialty) {
        const specialtyTexts = {
            'radiology': 'الأشعة',
            'general': 'عام',
            'emergency': 'طوارئ',
            'internal_medicine': 'باطنة',
            'cardiology': 'قلب',
            'neurology': 'أعصاب',
            'oncology': 'أورام'
        };
        return specialtyTexts[specialty] || specialty;
    }

    getLanguageText(language) {
        const languageTexts = {
            'en': 'إنجليزي',
            'ar': 'عربي',
            'fr': 'فرنسي'
        };
        return languageTexts[language] || language;
    }

    formatNumber(num) {
        if (num >= 1000000) {
            return (num / 1000000).toFixed(1) + 'م';
        } else if (num >= 1000) {
            return (num / 1000).toFixed(1) + 'ك';
        }
        return num.toString();
    }

    showDatasetDetails(datasetKey) {
        const dataset = this.datasets.find(d => d.key === datasetKey);
        if (!dataset) return;

        document.getElementById('dataset-details-title').innerHTML = 
            `<i class="fas fa-info-circle me-2"></i>${dataset.name}`;

        const detailsContent = `
            <div class="row">
                <div class="col-md-6">
                    <h6>معلومات أساسية</h6>
                    <table class="table table-sm">
                        <tr><td><strong>المعرف:</strong></td><td>${dataset.repo_id}</td></tr>
                        <tr><td><strong>الحجم:</strong></td><td>${dataset.size_gb} جيجابايت</td></tr>
                        <tr><td><strong>عدد العينات:</strong></td><td>${this.formatNumber(dataset.num_samples)}</td></tr>
                        <tr><td><strong>دعم التدفق:</strong></td><td>${dataset.streaming_supported ? 'نعم' : 'لا'}</td></tr>
                    </table>
                </div>
                <div class="col-md-6">
                    <h6>التفاصيل التقنية</h6>
                    <table class="table table-sm">
                        <tr><td><strong>تنسيق البيانات:</strong></td><td>${dataset.data_format}</td></tr>
                        <tr><td><strong>الوسائط:</strong></td><td>${dataset.modalities.join(', ')}</td></tr>
                        <tr><td><strong>التخصصات:</strong></td><td>${dataset.medical_specialties.join(', ')}</td></tr>
                        <tr><td><strong>اللغات:</strong></td><td>${dataset.languages.join(', ')}</td></tr>
                    </table>
                </div>
            </div>
            <div class="mt-3">
                <h6>الوصف</h6>
                <p class="text-muted">${dataset.description}</p>
            </div>
            <div class="mt-3">
                <h6>متطلبات النظام</h6>
                <div class="alert alert-info">
                    <i class="fas fa-info-circle me-2"></i>
                    يتطلب هذا المجموعة ذاكرة تقديرية ${Math.ceil(dataset.size_gb * 1.5)} جيجابايت للمعالجة
                </div>
            </div>
        `;

        document.getElementById('dataset-details-content').innerHTML = detailsContent;
        
        // Set up load button
        const loadBtn = document.getElementById('load-dataset-btn');
        loadBtn.onclick = () => this.loadDataset(datasetKey);
        
        const modal = new bootstrap.Modal(document.getElementById('datasetDetailsModal'));
        modal.show();
    }

    async loadDataset(datasetKey) {
        const dataset = this.datasets.find(d => d.key === datasetKey);
        if (!dataset) return;

        // Close details modal if open
        const detailsModal = bootstrap.Modal.getInstance(document.getElementById('datasetDetailsModal'));
        if (detailsModal) {
            detailsModal.hide();
        }

        // Show loading modal
        document.getElementById('loading-dataset-name').textContent = dataset.name;
        document.getElementById('loading-status').textContent = 'جاري تحضير التحميل...';
        
        const loadingModal = new bootstrap.Modal(document.getElementById('loadingModal'));
        loadingModal.show();

        try {
            const formData = new FormData();
            formData.append('dataset_name', datasetKey);
            formData.append('streaming', 'true');
            formData.append('split', 'train');

            document.getElementById('loading-status').textContent = 'جاري تحميل البيانات...';

            const response = await fetch('/api/medical-datasets/load', {
                method: 'POST',
                body: formData
            });

            const data = await response.json();

            if (response.ok) {
                this.loadedDatasets.add(datasetKey);
                this.renderDatasets();
                this.updateSystemInfo();
                
                loadingModal.hide();
                this.showSuccess(`تم تحميل ${dataset.name} بنجاح`);
            } else {
                loadingModal.hide();
                this.showError(data.detail || 'فشل في تحميل قاعدة البيانات');
            }
        } catch (error) {
            console.error('Error loading dataset:', error);
            loadingModal.hide();
            this.showError('خطأ في الاتصال بالخادم');
        }
    }

    async refreshDatasets() {
        await this.loadDatasets();
        await this.loadSystemInfo();
        this.showSuccess('تم تحديث البيانات');
    }

    showSuccess(message) {
        document.getElementById('success-message').textContent = message;
        const toast = new bootstrap.Toast(document.getElementById('success-toast'));
        toast.show();
    }

    showError(message) {
        document.getElementById('error-message').textContent = message;
        const toast = new bootstrap.Toast(document.getElementById('error-toast'));
        toast.show();
    }

    setupDatabaseManagement() {
        // Search datasets
        const searchButton = document.getElementById('search-datasets');
        if (searchButton) {
            searchButton.addEventListener('click', () => {
                this.searchDatabases();
            });
        }

        // Search on Enter key
        const searchQuery = document.getElementById('search-query');
        if (searchQuery) {
            searchQuery.addEventListener('keypress', (e) => {
                if (e.key === 'Enter') {
                    this.searchDatabases();
                }
            });
        }

        // Add dataset form
        const addForm = document.getElementById('add-dataset-form');
        if (addForm) {
            addForm.addEventListener('submit', (e) => {
                e.preventDefault();
                this.addDatabase();
            });
        }

        // Validate dataset
        const validateButton = document.getElementById('validate-dataset');
        if (validateButton) {
            validateButton.addEventListener('click', () => {
                this.validateDataset();
            });
        }

        // Refresh databases
        const refreshButton = document.getElementById('refresh-databases');
        if (refreshButton) {
            refreshButton.addEventListener('click', () => {
                this.loadConfiguredDatabases();
            });
        }

        // Load configured databases on startup
        this.loadConfiguredDatabases();
    }

    async searchDatabases() {
        const queryElement = document.getElementById('search-query');
        const categoryElement = document.getElementById('search-category');

        if (!queryElement) return;

        const query = queryElement.value.trim();
        const category = categoryElement ? categoryElement.value : '';

        if (!query) {
            this.showError('يرجى إدخال كلمة البحث');
            return;
        }

        const searchButton = document.getElementById('search-datasets');
        const originalText = searchButton.innerHTML;
        searchButton.innerHTML = '<i class="fas fa-spinner fa-spin"></i> جاري البحث...';
        searchButton.disabled = true;

        try {
            const response = await fetch('/api/databases/search', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    query: query,
                    limit: 20,
                    category: category || null
                })
            });

            const data = await response.json();

            if (data.success) {
                this.displaySearchResults(data.results);
            } else {
                this.showError('فشل في البحث عن قواعد البيانات');
            }

        } catch (error) {
            console.error('Error searching databases:', error);
            this.showError('خطأ في البحث عن قواعد البيانات');
        } finally {
            searchButton.innerHTML = originalText;
            searchButton.disabled = false;
        }
    }

    displaySearchResults(results) {
        const resultsContainer = document.getElementById('search-results-list');
        const searchResults = document.getElementById('search-results');

        if (!resultsContainer || !searchResults) return;

        if (results.length === 0) {
            resultsContainer.innerHTML = '<p class="text-muted">لم يتم العثور على نتائج</p>';
        } else {
            resultsContainer.innerHTML = results.map(result => `
                <div class="card mb-2">
                    <div class="card-body">
                        <div class="d-flex justify-content-between align-items-start">
                            <div>
                                <h6 class="card-title">${result.name}</h6>
                                <p class="card-text text-muted small">${result.description || 'لا يوجد وصف'}</p>
                                <div class="d-flex gap-2">
                                    <span class="badge bg-primary">${result.author}</span>
                                    <span class="badge bg-secondary">${result.downloads || 0} تحميل</span>
                                    <span class="badge bg-success">${result.likes || 0} إعجاب</span>
                                </div>
                            </div>
                            <button class="btn btn-sm btn-outline-primary" onclick="medicalDatasets.addDatabaseFromSearch('${result.id}', '${result.name}', '${result.description || ''}')">
                                <i class="fas fa-plus"></i> إضافة
                            </button>
                        </div>
                    </div>
                </div>
            `).join('');
        }

        searchResults.style.display = 'block';
    }

    async addDatabaseFromSearch(datasetId, name, description) {
        try {
            const databaseInfo = {
                name: name,
                dataset_id: datasetId,
                category: 'medical',
                description: description,
                language: 'English',
                modality: 'text'
            };

            const success = await this.submitDatabase(databaseInfo);
            if (success) {
                this.showSuccess(`تم إضافة قاعدة البيانات: ${name}`);
                this.loadConfiguredDatabases();
            }

        } catch (error) {
            console.error('Error adding database from search:', error);
            this.showError('فشل في إضافة قاعدة البيانات');
        }
    }

    async loadConfiguredDatabases() {
        try {
            const response = await fetch('/api/databases');
            const data = await response.json();

            if (data.success) {
                this.displayConfiguredDatabases(data.databases, data.selected);
            }

        } catch (error) {
            console.error('Error loading configured databases:', error);
        }
    }

    displayConfiguredDatabases(databases, selected) {
        const container = document.getElementById('configured-databases');

        if (!container) return;

        if (Object.keys(databases).length === 0) {
            container.innerHTML = '<p class="text-muted">لا توجد قواعد بيانات مُعدة</p>';
            return;
        }

        container.innerHTML = Object.entries(databases).map(([id, db]) => `
            <div class="card mb-2">
                <div class="card-body">
                    <div class="d-flex justify-content-between align-items-start">
                        <div class="flex-grow-1">
                            <div class="form-check">
                                <input class="form-check-input" type="checkbox"
                                       id="db-${id}" ${selected.includes(id) ? 'checked' : ''}
                                       onchange="medicalDatasets.toggleDatabaseSelection('${id}', this.checked)">
                                <label class="form-check-label" for="db-${id}">
                                    <h6 class="mb-1">${db.name}</h6>
                                </label>
                            </div>
                            <p class="text-muted small mb-1">${db.description || 'لا يوجد وصف'}</p>
                            <div class="d-flex gap-2">
                                <span class="badge bg-primary">${db.category}</span>
                                <span class="badge bg-secondary">${db.language}</span>
                                <span class="badge bg-info">${db.modality}</span>
                            </div>
                        </div>
                        <div class="d-flex gap-1">
                            <button class="btn btn-sm btn-outline-danger" onclick="medicalDatasets.removeDatabase('${id}')">
                                <i class="fas fa-trash"></i>
                            </button>
                        </div>
                    </div>
                </div>
            </div>
        `).join('');
    }

    async toggleDatabaseSelection(databaseId, selected) {
        try {
            if (selected) {
                const response = await fetch('/api/databases/select', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({
                        database_ids: [databaseId]
                    })
                });

                if (response.ok) {
                    this.showSuccess('تم تحديد قاعدة البيانات');
                }
            } else {
                this.showInfo('تم إلغاء تحديد قاعدة البيانات');
            }

        } catch (error) {
            console.error('Error toggling database selection:', error);
            this.showError('فشل في تحديث اختيار قاعدة البيانات');
        }
    }

    async removeDatabase(databaseId) {
        if (!confirm('هل أنت متأكد من حذف قاعدة البيانات؟')) {
            return;
        }

        try {
            const response = await fetch(`/api/databases/${encodeURIComponent(databaseId)}`, {
                method: 'DELETE'
            });

            const data = await response.json();

            if (data.success) {
                this.showSuccess('تم حذف قاعدة البيانات');
                this.loadConfiguredDatabases();
            } else {
                this.showError('فشل في حذف قاعدة البيانات');
            }

        } catch (error) {
            console.error('Error removing database:', error);
            this.showError('خطأ في حذف قاعدة البيانات');
        }
    }

    async submitDatabase(databaseInfo) {
        try {
            const response = await fetch('/api/databases/add', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify(databaseInfo)
            });

            const data = await response.json();
            return data.success;

        } catch (error) {
            console.error('Error submitting database:', error);
            this.showError('فشل في إضافة قاعدة البيانات');
            return false;
        }
    }
}

// Initialize medical datasets manager when page loads
document.addEventListener('DOMContentLoaded', () => {
    window.medicalDatasets = new MedicalDatasetsManager();
});