import { createModuleLogger } from "../log_system/log_funcs.js";
import { withErrorHandling, createValidationError, createNetworkError } from "../shared/error_handler.js";
const log = createModuleLogger('WebSocketManager');
export class WebSocketManager {
    constructor(url) {
        this.url = url;
        this.connect = withErrorHandling(() => {
            if (this.destroyed) {
                return;
            }
            if (this.socket && this.socket.readyState === WebSocket.OPEN) {
                log.debug("WebSocket is already open.");
                return;
            }
            if (this.isConnecting) {
                log.debug("Connection attempt already in progress.");
                return;
            }
            if (!this.url) {
                throw createValidationError("WebSocket URL is required", { url: this.url });
            }
            this.isConnecting = true;
            log.info(`Connecting to WebSocket at ${this.url}...`);
            const socket = new WebSocket(this.url);
            this.socket = socket;
            socket.onopen = () => {
                if (this.socket !== socket || this.destroyed)
                    return;
                this.isConnecting = false;
                this.reconnectAttempts = 0;
                log.info("WebSocket connection established.");
                this.flushMessageQueue();
            };
            socket.onmessage = (event) => {
                if (this.socket !== socket || this.destroyed)
                    return;
                try {
                    const data = JSON.parse(event.data);
                    log.debug("Received message:", data);
                    if (data.type === 'ack' && data.nodeId) {
                        const callback = this.ackCallbacks.get(data.nodeId);
                        if (callback) {
                            log.debug(`ACK received for nodeId: ${data.nodeId}, resolving promise.`);
                            callback.resolve(data);
                            this.ackCallbacks.delete(data.nodeId);
                        }
                    }
                }
                catch (error) {
                    log.error("Error parsing incoming WebSocket message:", error);
                }
            };
            socket.onclose = (event) => {
                if (this.socket !== socket)
                    return;
                this.isConnecting = false;
                this.socket = null;
                if (this.destroyed)
                    return;
                if (event.wasClean) {
                    log.info(`WebSocket closed cleanly, code=${event.code}, reason=${event.reason}`);
                }
                else {
                    log.warn("WebSocket connection died. Attempting to reconnect...");
                    this.handleReconnect();
                }
            };
            socket.onerror = (error) => {
                if (this.socket !== socket || this.destroyed)
                    return;
                this.isConnecting = false;
                log.error("WebSocket connection error", createNetworkError("WebSocket connection error", { error, url: this.url }));
            };
        }, 'WebSocketManager.connect');
        this.sendMessage = withErrorHandling(async (data, requiresAck = false) => {
            if (!data || typeof data !== 'object') {
                throw createValidationError("Message data is required", { data });
            }
            const nodeId = data.nodeId;
            if (requiresAck && !nodeId) {
                throw createValidationError("A nodeId is required for messages that need acknowledgment", { data, requiresAck });
            }
            if (this.destroyed) {
                throw createNetworkError("WebSocket manager is destroyed", { url: this.url });
            }
            return new Promise((resolve, reject) => {
                const message = JSON.stringify(data);
                if (this.socket && this.socket.readyState === WebSocket.OPEN) {
                    const resolvesWithoutAck = !requiresAck;
                    if (requiresAck && nodeId) {
                        log.debug(`Message for nodeId ${nodeId} requires ACK. Setting up callback.`);
                        const timeout = setTimeout(() => {
                            this.ackCallbacks.delete(nodeId);
                            reject(createNetworkError(`ACK timeout for nodeId ${nodeId}`, { nodeId, timeout: 10000 }));
                            log.warn(`ACK timeout for nodeId ${nodeId}.`);
                        }, 10000); // 10-second timeout
                        this.ackCallbacks.set(nodeId, {
                            resolve: (responseData) => {
                                clearTimeout(timeout);
                                resolve(responseData);
                            },
                            reject: (error) => {
                                clearTimeout(timeout);
                                reject(error);
                            }
                        });
                    }
                    try {
                        this.socket.send(message);
                        log.debug("Sent message:", data);
                        if (resolvesWithoutAck)
                            resolve();
                    }
                    catch (error) {
                        if (requiresAck && nodeId) {
                            const callback = this.ackCallbacks.get(nodeId);
                            this.ackCallbacks.delete(nodeId);
                            callback?.reject(error);
                        }
                        else {
                            reject(error);
                        }
                    }
                }
                else {
                    log.warn("WebSocket not open. Queuing message.");
                    this.messageQueue.push(message);
                    if (!this.isConnecting) {
                        this.connect();
                    }
                    if (requiresAck) {
                        reject(createNetworkError("Cannot send message with ACK required while disconnected", {
                            socketState: this.socket?.readyState,
                            isConnecting: this.isConnecting
                        }));
                    }
                    else {
                        resolve();
                    }
                }
            });
        }, 'WebSocketManager.sendMessage');
        this.socket = null;
        this.messageQueue = [];
        this.isConnecting = false;
        this.reconnectAttempts = 0;
        this.reconnectTimer = null;
        this.maxReconnectAttempts = 10;
        this.reconnectInterval = 5000; // 5 seconds
        this.ackCallbacks = new Map();
        this.messageIdCounter = 0;
        this.destroyed = false;
        this.connect();
    }
    handleReconnect() {
        if (this.destroyed || this.reconnectTimer !== null)
            return;
        if (this.reconnectAttempts < this.maxReconnectAttempts) {
            this.reconnectAttempts++;
            log.info(`Reconnect attempt ${this.reconnectAttempts}/${this.maxReconnectAttempts}...`);
            this.reconnectTimer = setTimeout(() => {
                this.reconnectTimer = null;
                void this.connect();
            }, this.reconnectInterval);
        }
        else {
            log.error("Max reconnect attempts reached. Giving up.");
        }
    }
    flushMessageQueue() {
        log.debug(`Flushing ${this.messageQueue.length} queued messages.`);
        while (this.messageQueue.length > 0) {
            const message = this.messageQueue.shift();
            if (this.socket && message) {
                this.socket.send(message);
            }
        }
    }
    destroy() {
        if (this.destroyed)
            return;
        this.destroyed = true;
        this.isConnecting = false;
        if (this.reconnectTimer !== null) {
            clearTimeout(this.reconnectTimer);
            this.reconnectTimer = null;
        }
        const socket = this.socket;
        this.socket = null;
        socket?.close();
        const error = createNetworkError("WebSocket manager was destroyed", { url: this.url });
        for (const callback of this.ackCallbacks.values()) {
            callback.reject(error);
        }
        this.ackCallbacks.clear();
        this.messageQueue = [];
    }
}
const protocol = location.protocol === "https:" ? "wss:" : "ws:";
const wsUrl = `${protocol}//${location.host}/layerforge/canvas_ws`;
export const webSocketManager = new WebSocketManager(wsUrl);