import * as chalk from "chalk";
import * as chokidar from "chokidar";
import {basename, extname} from "path";

import {Data} from "./data";
import {Config, getConfig} from "./config";

export class Watch {
    private io: any;
    private data: Data = new Data();
    private config: Config = getConfig();

    constructor(io: any) {
        this.io = io;
    }

    private eventLog(event: string, path: string): void {
        let d: Date = new Date();
        let h: string = `0${d.getHours()}`.substr(-2);
        let m: string = `0${d.getMinutes()}`.substr(-2);
        let s: string = `0${d.getSeconds()}`.substr(-2);

        console.log(`
${chalk.red(`${h}:${m}:${s}`)}: ${chalk.green(path)} 
`);
    }

    private eventEmit(extType: string, name: string): void {
        const viewData: any = {};
        viewData.extType = extType;
        viewData.name = name;

        this.io.emit('change', viewData);
    }

    public start(): any {
        console.log(`Watching ${this.config.src} for changes.`);

        return chokidar
            .watch(this.config.src, {ignored: /[\/\\]\./, persistent: true})
            .on('change', (filePath: string) => {
                const ext: string = extname(filePath).replace(/\./, '');
                const name: string = basename(filePath).replace(RegExp(extname(filePath)), '');

                Object.keys(this.config.ext).map((type) => {
                    if (this.config.ext[type] === ext) {
                        this.eventEmit(type, name);
                    } else if (this.config.ext[type]) {
                        this.eventEmit('context', name);
                    }
                });

                this.eventLog('Changed', filePath);
            });
    }
}