import * as vscode from 'vscode';
import { LogChannel } from './LogChannel';

/**
 * @class 
 * @name LoggerEventHub
 * @description Application event hub
 */
export class LoggerEventHub {
    public readonly onDidChangeEmitter = new vscode.EventEmitter<LoggerEventHubMessage>();
    public get onEvent(): vscode.Event<any> {
        return this.onDidChangeEmitter.event;
    }

    public broadcastEvent(data: LoggerEventHubMessage) {
        this.onDidChangeEmitter.fire(data);
        this.logChannel.AppendLog(data.toString());
        if(data.foreground){
            switch(data.severity){
                case LoggerEventHubMessageSeverity.info:
                    vscode.window.showInformationMessage(this.name + ": " + data.description);
                    break
                case LoggerEventHubMessageSeverity.success:
                    vscode.window.showInformationMessage(this.name + ": "+ data.description + " (success)");
                    break
                case LoggerEventHubMessageSeverity.warning:
                    vscode.window.showWarningMessage(this.name + ": " + data.description);
                    break
                case LoggerEventHubMessageSeverity.error:
                    vscode.window.showErrorMessage(this.name + ": " + data.description);
                    break
                default:
                    break
            }
        }
    }

    private logChannel : LogChannel;

    constructor(readonly name: string){
        this.logChannel = new LogChannel(name);
    }
}

/**
 * @class 
 * @name LoggerEventHubMessageSeverity
 * @description Events severity type
 */
export enum LoggerEventHubMessageSeverity { info = "info", success = "success", warning = "warning", error  = "error" };

/**
 * @class 
 * @name LoggerEventHubMessage
 * @description Events model
 */
export class LoggerEventHubMessage {
    constructor(
        readonly description: string,
        readonly severity: LoggerEventHubMessageSeverity,
        readonly foreground: boolean = false
    ) { }

    public toString() : string {
        return "("+this.severity.toString()+") "+this.description;
    }
}