var readline = require('readline');
var log = require('hlogger').createLogger("shell");
var path = require('path');



var shellActivator = {
	start(context) {
		this.context = context;
		this.manager = context.manager;

		this.stdout = process.stdout;
		this.registerCommands(context);	

		this.cli = readline.createInterface(process.stdin,this.stdout,(str) => this.completer(str));
		this.cli.setPrompt("HCI> ");
	
		this.cli.on('line',(cmd) => {
			if(cmd.length == "") {this.cli.prompt(); return;}
			var [cmd,...args] = cmd.split(/\s/);
			var req = { cmd:cmd, args:args }
			var res = this.stdout;
			context.events
				.channel(context.name,'cmd')
				.propagate(cmd,req,res)
				.then((evt)=> {
					if(evt.count == 0) console.log("Command not found:" + cmd);
						// This is wrong perhaps
					this.cli.prompt();	
				}).catch((err) => {
					console.log("Promise error: ", err);
				});
		});

		this.cli.prompt();
	},
	stop(context) {
		log.info("Closing cli");
		this.cli.close();
	},
	completer(str) {
		// Hack
		var re = new RegExp("^"+ this.context.name + "/cmd/(" + str + ".*)");
		var hits = [];
		this.manager.eventual._events.ctx.forEach((ctx) => {
			Object.keys(ctx.listeners).forEach((k) => {
				var res = k.match(re);
				if(res) {
					hits.push(res[1]);
				}
			});
		});
		return [hits,str];
	},
	output(str) {
		this.stdout.write(str + "\n");
	},
	registerCommands(context) {
	}
	
}









module.exports.bundleActivator = shellActivator;