/**
 * QuadrantX Dashboard - API Client Module
 * 
 * Handles all API calls with authentication.
 */

class ApiClient {
    constructor(config, authManager) {
        this.config = config;
        this.auth = authManager;
    }

    /**
     * Make authenticated API request
     */
    async request(endpoint, options = {}) {
        const url = `${this.config.API_ENDPOINT}${endpoint}`;
        
        const headers = {
            'Content-Type': 'application/json',
            ...options.headers
        };

        // Add authorization header
        const token = this.auth.getIdToken();
        if (token) {
            headers['Authorization'] = `Bearer ${token}`;
        }

        try {
            const response = await fetch(url, {
                ...options,
                headers
            });

            if (response.status === 401) {
                // Token expired, try refresh
                const refreshed = await this.auth.refreshTokens();
                if (refreshed) {
                    headers['Authorization'] = `Bearer ${this.auth.getIdToken()}`;
                    return fetch(url, { ...options, headers }).then(r => r.json());
                } else {
                    // Redirect to login
                    this.auth.login();
                    throw new Error('Session expired');
                }
            }

            if (response.status === 403) {
                const error = await response.json();
                throw new Error(error.message || 'Access denied');
            }

            if (!response.ok) {
                const error = await response.json();
                throw new Error(error.message || 'API error');
            }

            return await response.json();

        } catch (error) {
            console.error('API request error:', error);
            throw error;
        }
    }

    /**
     * Get categories
     */
    async getCategories(showHidden = false) {
        const params = new URLSearchParams();
        if (showHidden) params.set('show_hidden', 'true');
        
        return this.request(`/api/categories?${params}`);
    }

    /**
     * Get vendors for a category
     */
    async getVendors(categoryId, options = {}) {
        const params = new URLSearchParams({ category_id: categoryId });
        
        if (options.startDate) params.set('start_date', options.startDate);
        if (options.endDate) params.set('end_date', options.endDate);
        if (options.showHidden) params.set('show_hidden', 'true');
        if (options.sortBy) params.set('sort_by', options.sortBy);
        
        return this.request(`/api/vendors?${params}`);
    }

    /**
     * Get vendor scores for charting
     */
    async getVendorScores(categoryId, vendorIds, options = {}) {
        const params = new URLSearchParams({
            category_id: categoryId,
            vendor_ids: vendorIds.join(',')
        });
        
        if (options.startDate) params.set('start_date', options.startDate);
        if (options.endDate) params.set('end_date', options.endDate);
        if (options.model) params.set('model', options.model);
        if (options.showHidden) params.set('show_hidden', 'true');
        
        return this.request(`/api/vendor-scores?${params}`);
    }

    /**
     * Get category summary
     */
    async getCategorySummary(categoryId, options = {}) {
        const params = new URLSearchParams({ category_id: categoryId });
        
        if (options.startDate) params.set('start_date', options.startDate);
        if (options.endDate) params.set('end_date', options.endDate);
        if (options.showHidden) params.set('show_hidden', 'true');
        
        return this.request(`/api/category-summary?${params}`);
    }

    /**
     * Get models for a category
     */
    async getModels(categoryId, options = {}) {
        const params = new URLSearchParams({ category_id: categoryId });
        
        if (options.startDate) params.set('start_date', options.startDate);
        if (options.endDate) params.set('end_date', options.endDate);
        if (options.showHidden) params.set('show_hidden', 'true');
        
        return this.request(`/api/models?${params}`);
    }

    /**
     * Get report vendor detail
     */
    async getReportVendorDetail(reportId, vendorId) {
        const params = new URLSearchParams({
            report_id: reportId,
            vendor_id: vendorId
        });
        
        return this.request(`/api/report-vendor-detail?${params}`);
    }
}

// Export for use in app
window.ApiClient = ApiClient;