import * as cp from 'child_process';
import * as util from 'util';
import * as shelljs from 'shelljs';

import { Output } from './interfaces/output.interface';
import { Tree } from './interfaces/tree.interface';
import path = require('path');

const exec = util.promisify(cp.execFile);

export class Sway {
  private commands: string[] = [];

  public async getOutputs(): Promise<Output[]> {
    const json = shelljs.exec('swaymsg -r -t get_outputs', {
      async: false,
      silent: true,
    });

    return JSON.parse(json);
  }

  public async getTree() {
    const json = shelljs.exec('swaymsg -t get_tree', {
      async: false,
      silent: true,
    });

    return JSON.parse(json) as Tree;
  }

  public focus() {
    this.commands.push('focus');
    return this;
  }

  public output(output: Output) {
    this.commands.push('output');
    this.commands.push(`"${output.make} ${output.model} ${output.serial}"`);
    return this;
  }

  public bg(file: string, mode: 'fill') {
    this.commands.push('bg');
    this.commands.push(`"${file}"`);
    this.commands.push(mode);
    return this;
  }

  public async exec() {
    await exec('swaymsg', this.commands);

    this.commands = [];
  }
}

if (require.main.filename === path.join(__dirname, __filename)) {
  console.dir({ x: require.main.filename, y: __filename });
}