import { x_SSEClient } from "x_sse_s";
import {xSSEOptions} from "../interface.uts"
export class SSEClientApp {
	private eventSource : x_SSEClient | null = null;
	private url : string;
	private onOpenEvt = () => { }
	private onErrorEvt = () => { }
	private onClosedEvt = () => { }
	private onMessageEvt = (data : string) => { }
	private headers:Map<string,string>
	constructor(options:xSSEOptions) {
		this.url = options.url;
		const headersOpts = options?.header??({} as UTSJSONObject)
		this.headers = headersOpts.toMap()
	}

	// 打开连接
	public connect() : void {
		if (this.eventSource||this.isConnected()) {
			console.error('已有打开的，不允许重复');
			return;
		}
		this.eventSource = new x_SSEClient(this.url,this.headers);
		this.eventSource.onOpen(this.onOpenEvt)
		this.eventSource.onError(this.onErrorEvt)
		this.eventSource.onClosed(this.onClosedEvt)
		this.eventSource.onMessage(this.onMessageEvt)
		this.eventSource.connect();
	}
	onOpen(callback:()=>void){
		this.onOpenEvt = callback
	}
	onError(callback:()=>void){
		this.onErrorEvt = callback
	}
	onClosed(callback:()=>void){
		this.onClosedEvt = callback
	}
	onMessage(callback:(data:string)=>void){
		this.onMessageEvt = callback
	}
	// 关闭连接
	public disconnect() : void {
		if (!this.eventSource) {
			return;
		}
		this.eventSource.disconnect();
		this.onClosedEvt()
		this.eventSource = null;
	}

	isConnected():boolean {
		return this.eventSource?.isConnected()??false
	}
}