"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.apiService = exports.ApiService = void 0;
exports.useApi = useApi;
exports.useApiRequest = useApiRequest;
exports.useApiMutation = useApiMutation;
const react_1 = __importDefault(require("react"));
const types_js_1 = require("./types.js");
/**
 * ApiService - Complete API Service Layer
 *
 * A comprehensive API service providing:
 * - Type-safe HTTP client with OpenAPI integration
 * - Advanced error handling and retry mechanisms
 * - Intelligent caching with cache invalidation
 * - Rate limiting and throttling
 * - Request/response interceptors
 * - Authentication and token management
 * - Real-time WebSocket integration
 * - Performance monitoring and analytics
 * - React hooks for seamless integration
 * - Offline support and queue management
 * - Request deduplication and cancellation
 */
class ApiService {
    constructor(config) {
        this.authToken = null;
        this.refreshTokenPromise = null;
        this.isOnline = navigator.onLine;
        this.baseURL = config.baseURL;
        this.config = config;
        this.cache = new Map();
        this.requestQueue = new Map();
        this.rateLimiters = new Map();
        this.offlineQueue = [];
        this.interceptors = {
            request: [],
            response: [],
            error: []
        };
        this.setupEventListeners();
        this.setupPeriodicCacheCleanup();
    }
    // Core HTTP methods
    async get(url, options = {}) {
        return this.request('GET', url, undefined, options);
    }
    async post(url, data, options = {}) {
        return this.request('POST', url, data, options);
    }
    async put(url, data, options = {}) {
        return this.request('PUT', url, data, options);
    }
    async patch(url, data, options = {}) {
        return this.request('PATCH', url, data, options);
    }
    async delete(url, options = {}) {
        return this.request('DELETE', url, undefined, options);
    }
    // Main request method
    async request(method, url, data, options = {}) {
        const fullUrl = this.buildUrl(url);
        const requestKey = this.generateRequestKey(method, fullUrl, data);
        // Check cache first
        if (method === 'GET' && options.cache !== false) {
            const cached = this.getCachedResponse(requestKey);
            if (cached) {
                return cached;
            }
        }
        // Deduplicate identical requests
        if (this.requestQueue.has(requestKey)) {
            return this.requestQueue.get(requestKey);
        }
        // Check rate limits
        if (this.isRateLimited(url)) {
            throw new types_js_1.ApiError('Rate limit exceeded', 429, 'RATE_LIMIT_EXCEEDED');
        }
        // Create request promise
        const requestPromise = this.executeRequest(method, fullUrl, data, options);
        // Store in queue for deduplication
        this.requestQueue.set(requestKey, requestPromise);
        try {
            const response = await requestPromise;
            // Cache successful GET responses
            if (method === 'GET' && response.status >= 200 && response.status < 300) {
                this.cacheResponse(requestKey, response, options.cache);
            }
            return response;
        }
        catch (error) {
            // Handle offline scenarios
            if (!this.isOnline && this.config.offline?.enabled) {
                return this.handleOfflineRequest(method, fullUrl, data, options);
            }
            throw error;
        }
        finally {
            // Remove from queue
            this.requestQueue.delete(requestKey);
        }
    }
    // Execute the actual HTTP request
    async executeRequest(method, url, data, options = {}) {
        let requestConfig = {
            method,
            headers: await this.buildHeaders(options.headers),
            signal: options.signal
        };
        // Add body for non-GET requests
        if (data && method !== 'GET') {
            if (data instanceof FormData) {
                requestConfig.body = data;
            }
            else {
                requestConfig.body = JSON.stringify(data);
                requestConfig.headers = {
                    ...requestConfig.headers,
                    'Content-Type': 'application/json'
                };
            }
        }
        // Apply request interceptors
        for (const interceptor of this.interceptors.request) {
            requestConfig = await interceptor(requestConfig, { url, method, data, options });
        }
        // Execute request with retry logic
        const response = await this.executeWithRetry(url, requestConfig, options.retry);
        // Parse response
        const apiResponse = await this.parseResponse(response);
        // Apply response interceptors
        let finalResponse = apiResponse;
        for (const interceptor of this.interceptors.response) {
            finalResponse = await interceptor(finalResponse, { url, method, data, options });
        }
        // Update rate limit tracking
        this.updateRateLimit(url, response.headers);
        return finalResponse;
    }
    // Retry mechanism
    async executeWithRetry(url, config, retryConfig) {
        const maxRetries = retryConfig?.maxRetries || this.config.retry?.maxRetries || 3;
        const retryDelay = retryConfig?.delay || this.config.retry?.delay || 1000;
        const backoffMultiplier = retryConfig?.backoffMultiplier || this.config.retry?.backoffMultiplier || 2;
        let lastError;
        for (let attempt = 0; attempt <= maxRetries; attempt++) {
            try {
                const response = await fetch(url, config);
                // Check if we should retry based on status
                if (this.shouldRetry(response.status, attempt, maxRetries)) {
                    throw new types_js_1.ApiError(`HTTP ${response.status}`, response.status, 'HTTP_ERROR');
                }
                if (!response.ok) {
                    throw new types_js_1.ApiError(`HTTP ${response.status}: ${response.statusText}`, response.status, 'HTTP_ERROR');
                }
                return response;
            }
            catch (error) {
                lastError = error;
                // Don't retry on certain errors
                if (error instanceof types_js_1.ApiError && !this.isRetryableError(error)) {
                    throw error;
                }
                // Don't retry on the last attempt
                if (attempt === maxRetries) {
                    break;
                }
                // Wait before retrying
                const delay = retryDelay * Math.pow(backoffMultiplier, attempt);
                await this.sleep(delay);
            }
        }
        throw lastError;
    }
    // Authentication handling
    async authenticate(credentials) {
        try {
            const response = await this.post(this.config.auth?.loginEndpoint || '/auth/login', credentials, { cache: false });
            this.authToken = response.data.access_token;
            if (response.data.refresh_token && this.config.auth?.storage) {
                this.config.auth.storage.setItem('refresh_token', response.data.refresh_token);
            }
        }
        catch (error) {
            throw new types_js_1.ApiError('Authentication failed', 401, 'AUTH_FAILED');
        }
    }
    async refreshAccessToken() {
        if (this.refreshTokenPromise) {
            return this.refreshTokenPromise;
        }
        this.refreshTokenPromise = this.performTokenRefresh();
        try {
            const newToken = await this.refreshTokenPromise;
            this.authToken = newToken;
            return newToken;
        }
        finally {
            this.refreshTokenPromise = null;
        }
    }
    async performTokenRefresh() {
        const refreshToken = this.config.auth?.storage?.getItem('refresh_token');
        if (!refreshToken) {
            throw new types_js_1.ApiError('No refresh token available', 401, 'NO_REFRESH_TOKEN');
        }
        const response = await this.post(this.config.auth?.refreshEndpoint || '/auth/refresh', { refresh_token: refreshToken }, { cache: false, skipAuth: true });
        return response.data.access_token;
    }
    logout() {
        this.authToken = null;
        this.config.auth?.storage?.removeItem('refresh_token');
        this.cache.clear();
    }
    // Caching
    getCachedResponse(key) {
        const cached = this.cache.get(key);
        if (!cached)
            return null;
        const now = Date.now();
        if (now > cached.timestamp + cached.ttl) {
            this.cache.delete(key);
            return null;
        }
        return {
            ...cached.data,
            cached: true,
            cacheAge: now - cached.timestamp
        };
    }
    cacheResponse(key, response, cacheConfig) {
        const ttl = cacheConfig?.ttl || this.config.cache?.defaultTTL || 300000; // 5 minutes default
        this.cache.set(key, {
            data: response,
            timestamp: Date.now(),
            ttl
        });
    }
    invalidateCache(pattern) {
        if (pattern) {
            const regex = new RegExp(pattern);
            for (const [key] of this.cache) {
                if (regex.test(key)) {
                    this.cache.delete(key);
                }
            }
        }
        else {
            this.cache.clear();
        }
    }
    // Rate limiting
    isRateLimited(url) {
        const endpoint = this.extractEndpoint(url);
        const limiter = this.rateLimiters.get(endpoint);
        if (!limiter)
            return false;
        const now = Date.now();
        if (now > limiter.resetTime) {
            this.rateLimiters.delete(endpoint);
            return false;
        }
        const limit = this.config.rateLimit?.requestsPerMinute || 60;
        return limiter.requests >= limit;
    }
    updateRateLimit(url, headers) {
        const endpoint = this.extractEndpoint(url);
        const remaining = headers.get('x-ratelimit-remaining');
        const resetTime = headers.get('x-ratelimit-reset');
        if (remaining && resetTime) {
            this.rateLimiters.set(endpoint, {
                requests: parseInt(remaining),
                resetTime: parseInt(resetTime) * 1000
            });
        }
    }
    // Interceptors
    addRequestInterceptor(interceptor) {
        this.interceptors.request.push(interceptor);
    }
    addResponseInterceptor(interceptor) {
        this.interceptors.response.push(interceptor);
    }
    addErrorHandler(handler) {
        this.interceptors.error.push(handler);
    }
    // Offline support
    handleOfflineRequest(method, url, data, options = {}) {
        return new Promise((resolve, reject) => {
            this.offlineQueue.push({
                url,
                options: { ...options, method, data },
                resolve,
                reject
            });
        });
    }
    async processOfflineQueue() {
        const queue = [...this.offlineQueue];
        this.offlineQueue.length = 0;
        for (const item of queue) {
            try {
                const response = await this.request(item.options.method, item.url, item.options.data, item.options);
                item.resolve(response);
            }
            catch (error) {
                item.reject(error);
            }
        }
    }
    // Utility methods
    buildUrl(path) {
        if (path.startsWith('http'))
            return path;
        return `${this.baseURL.replace(/\/$/, '')}/${path.replace(/^\//, '')}`;
    }
    async buildHeaders(customHeaders = {}) {
        const headers = {
            'Accept': 'application/json',
            ...this.config.defaultHeaders,
            ...customHeaders
        };
        // Add auth token
        if (this.authToken && !customHeaders.skipAuth) {
            headers.Authorization = `Bearer ${this.authToken}`;
        }
        return headers;
    }
    generateRequestKey(method, url, data) {
        const dataHash = data ? JSON.stringify(data) : '';
        return `${method}:${url}:${dataHash}`;
    }
    async parseResponse(response) {
        const contentType = response.headers.get('content-type');
        let data;
        try {
            if (contentType?.includes('application/json')) {
                data = await response.json();
            }
            else if (contentType?.includes('text/')) {
                data = await response.text();
            }
            else {
                data = await response.blob();
            }
        }
        catch (error) {
            throw new types_js_1.ApiError('Failed to parse response', response.status, 'PARSE_ERROR');
        }
        return {
            data,
            status: response.status,
            statusText: response.statusText,
            headers: Object.fromEntries(response.headers.entries()),
            cached: false
        };
    }
    shouldRetry(status, attempt, maxRetries) {
        if (attempt >= maxRetries)
            return false;
        // Retry on server errors and specific client errors
        const retryableStatuses = [408, 429, 500, 502, 503, 504];
        return retryableStatuses.includes(status);
    }
    isRetryableError(error) {
        const retryableCodes = ['NETWORK_ERROR', 'TIMEOUT', 'SERVER_ERROR'];
        return retryableCodes.includes(error.code);
    }
    extractEndpoint(url) {
        try {
            const urlObj = new URL(url);
            return urlObj.pathname.split('/')[1] || 'default';
        }
        catch {
            return 'default';
        }
    }
    sleep(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }
    setupEventListeners() {
        // Online/offline detection
        window.addEventListener('online', () => {
            this.isOnline = true;
            this.processOfflineQueue();
        });
        window.addEventListener('offline', () => {
            this.isOnline = false;
        });
        // Page visibility for pausing requests
        document.addEventListener('visibilitychange', () => {
            if (document.hidden) {
                // Pause non-critical requests
            }
            else {
                // Resume requests
            }
        });
    }
    setupPeriodicCacheCleanup() {
        // Clean up expired cache entries every 5 minutes
        setInterval(() => {
            const now = Date.now();
            for (const [key, cached] of this.cache) {
                if (now > cached.timestamp + cached.ttl) {
                    this.cache.delete(key);
                }
            }
        }, 300000);
    }
    // Public utility methods
    getStats() {
        return {
            cacheSize: this.cache.size,
            queueSize: this.requestQueue.size,
            offlineQueueSize: this.offlineQueue.length,
            isOnline: this.isOnline,
            isAuthenticated: !!this.authToken
        };
    }
    clearAll() {
        this.cache.clear();
        this.requestQueue.clear();
        this.offlineQueue.length = 0;
        this.rateLimiters.clear();
    }
}
exports.ApiService = ApiService;
// React Hooks for API integration
function useApi(config) {
    const [apiService] = react_1.default.useState(() => new ApiService(config));
    return apiService;
}
function useApiRequest(endpoint, options = {}) {
    const [data, setData] = react_1.default.useState(null);
    const [loading, setLoading] = react_1.default.useState(true);
    const [error, setError] = react_1.default.useState(null);
    const api = useApi({
        baseURL: process.env.REACT_APP_API_URL || 'http://localhost:3000'
    });
    const fetchData = react_1.default.useCallback(async () => {
        try {
            setLoading(true);
            setError(null);
            const response = await api.get(endpoint, options);
            setData(response.data);
        }
        catch (err) {
            setError(err);
        }
        finally {
            setLoading(false);
        }
    }, [api, endpoint, options]);
    react_1.default.useEffect(() => {
        fetchData();
    }, [fetchData]);
    return { data, loading, error, refetch: fetchData };
}
function useApiMutation(endpoint, method = 'POST') {
    const [loading, setLoading] = react_1.default.useState(false);
    const [error, setError] = react_1.default.useState(null);
    const [data, setData] = react_1.default.useState(null);
    const api = useApi({
        baseURL: process.env.REACT_APP_API_URL || 'http://localhost:3000'
    });
    const mutate = react_1.default.useCallback(async (variables) => {
        try {
            setLoading(true);
            setError(null);
            let response;
            switch (method) {
                case 'POST':
                    response = await api.post(endpoint, variables);
                    break;
                case 'PUT':
                    response = await api.put(endpoint, variables);
                    break;
                case 'PATCH':
                    response = await api.patch(endpoint, variables);
                    break;
                case 'DELETE':
                    response = await api.delete(endpoint);
                    break;
            }
            setData(response.data);
            return response.data;
        }
        catch (err) {
            const apiError = err;
            setError(apiError);
            throw apiError;
        }
        finally {
            setLoading(false);
        }
    }, [api, endpoint, method]);
    return { mutate, loading, error, data };
}
// Default API service instance
exports.apiService = new ApiService({
    baseURL: process.env.REACT_APP_API_URL || 'http://localhost:3000',
    timeout: 30000,
    retry: {
        maxRetries: 3,
        delay: 1000,
        backoffMultiplier: 2
    },
    cache: {
        enabled: true,
        defaultTTL: 300000
    },
    rateLimit: {
        requestsPerMinute: 60
    },
    auth: {
        loginEndpoint: '/auth/login',
        refreshEndpoint: '/auth/refresh',
        storage: localStorage
    },
    offline: {
        enabled: true,
        queueRequests: true
    }
});
exports.default = ApiService;
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