const path = require('path')
const si = require('systeminformation');
const spawn = require('child_process').spawn;
const os = require("os");

const isMacOS = os.type() === "Darwin";

module.exports = () => {
  const init = (TouchBar) => {
    const {TouchBarButton, TouchBarSpacer} = TouchBar;

    const LOAD_NORMAL = "#2ecc71";
    const LOAD_MEDIUM = "#f1c40f";
    const LOAD_HIGH = "#d35400";
    const LOAD_SEVERE = "#e74c3c";

    const cpu = new TouchBarButton({
      label: '',
      backgroundColor: "#bdc3c7",
      icon: path.join(__dirname, 'icons/chip.png'),
      iconPosition: "left",
      click: () => {
        spawn("/System/Applications/Utilities/Activity Monitor.app/Contents/MacOS/Activity\ Monitor", []);
      }
    });

    const memory = new TouchBarButton({
      label: '',
      backgroundColor: "#bdc3c7",
      icon: path.join(__dirname, 'icons/ram.png'),
      iconPosition: "left"
    });

    const network = new TouchBarButton({
      label: '',
      backgroundColor: '#3498db',
      icon: path.join(__dirname, 'icons/internet.png'),
      iconPosition: "left"
    });

    const battery = new TouchBarButton({
      label: '',
      backgroundColor: "#bdc3c7",
      icon: path.join(__dirname, 'icons/power.png'),
      iconPosition: "left"
    });

    const updateData = () => {
      si.currentLoad(function(data) {
        if (typeof data !== 'undefined' && data){
          const load = data.currentLoad.toFixed(0)
          cpu.label = load+"%"
          if (load <= 20) cpu.backgroundColor = LOAD_NORMAL;
          else if (load > 20 && load <= 40) cpu.backgroundColor = LOAD_MEDIUM;
          else if (load > 40 && load <= 80) cpu.backgroundColor = LOAD_HIGH;
          else if (load > 80 && load <= 100) cpu.backgroundColor = LOAD_SEVERE;
        }
      })
      si.mem(function(data) {
        if (typeof data !== 'undefined' && data){
          const load = ((100* data.active ) / data.total).toFixed(0)
          memory.label = load+"%"
          if (load <= 20) memory.backgroundColor = LOAD_NORMAL;
          else if (load > 20 && load <= 40) memory.backgroundColor = LOAD_MEDIUM;
          else if (load > 40 && load <= 80) memory.backgroundColor = LOAD_HIGH;
          else if (load > 80 && load <= 100) memory.backgroundColor = LOAD_SEVERE;
        }

      })
      si.networkStats("", function(data) {
        if (typeof data !== 'undefined' && data){
          const kbtx = (data[0].tx_sec * 0.001).toFixed(0)
          const kbrx = (data[0].rx_sec * 0.001).toFixed(0)
          const l = (kbtx+kbrx).toString().length

          network.label = "⇡"+ (kbtx*0.001).toFixed(2)
            +" ⇣"+ (kbrx*0.001).toFixed(2) +" MB/s"

        }
      })

      si.battery( function(data) {
        if (typeof data !== 'undefined' && data){
          if (data.ischarging){
            battery.icon = path.join(__dirname, 'icons/charger.png')
          }else{
            battery.icon = path.join(__dirname, 'icons/power.png')
          }
          const load = data.percent.toFixed(0)
          battery.label = load+"%"
          if (load <= 20) battery.backgroundColor = LOAD_SEVERE;
          else if (load > 20 && load <= 40) battery.backgroundColor = LOAD_HIGH;
          else if (load > 40 && load <= 80) battery.backgroundColor = LOAD_MEDIUM;
          else if (load > 80 && load <= 100) battery.backgroundColor = LOAD_NORMAL
        }
      })
    }

    const touchBar = new TouchBar({
      items: [
        cpu,
        new TouchBarSpacer({size: 'small'}),
        memory,
        new TouchBarSpacer({size: 'small'}),
        network,
        new TouchBarSpacer({size: 'small'}),
        battery,
      ]
    })

    const start = (window) => {
      window.on('focus', () => {
        updateData();
      });
    }
    return {
      start,
      touchBar,
    }
  }

  return {
    onReady(ctx) {
      if (!isMacOS) return;
      const {TouchBar, mainWindow} = ctx;
      const {TouchBarPopover} = TouchBar;
      const mito = init(TouchBar);
      const monitor = new TouchBarPopover({
        items: mito.touchBar,
        label: '系统监控',
        showCloseButton: true
      });

      const touchBar = new TouchBar({
        items: [
          monitor,
        ]
      });
      mainWindow.setTouchBar(touchBar);
      mito.start(mainWindow);
    }
  }
}