import { BrowserWindow, BrowserWindowConstructorOptions, app, session, screen, desktopCapturer, globalShortcut } from "electron"
import { Window } from "./win"
import { join } from "path"
import { platform, env } from "process"

export default class ScreenShotsWindow implements Window {
  win: BrowserWindow
  option: BrowserWindowConstructorOptions
  constructor(opts?: BrowserWindowConstructorOptions) {
    this.option = {
      ...opts,
      frame: false,
      transparent: true,
      show: false,
      resizable: false,
      webPreferences: {
        webSecurity: false,
        contextIsolation: true,
        nodeIntegration: true,
        preload: join(app.getAppPath(), 'preload.js'),
      }
    }
    if (platform !== 'linux') {
      this.option.titleBarStyle = 'hidden'
      this.option.skipTaskbar = true
    }
    this.setup()
  }

  async setup() {
    this.win = new BrowserWindow(this.option)
    this.win?.loadFile(join(app.getAppPath(), 'screen-shots/index.html'))
    // window
    if (platform === 'win32') {
      // 禁用右键菜单
      this.win.hookWindowMessage(278, () => {
        this.win.setEnabled(false); //窗口禁用
        setTimeout(() => {
          this.win.setEnabled(true);
        }, 100); //延时太快会立刻启动，太慢会妨碍窗口其他操作，可自行测试最佳时间
        return true;
      })
    }
    // 注册截图快捷键
    globalShortcut.register('ESC', () => {
      if (!this.win?.isDestroyed() && this.win?.isFocused()) {
        this.win.hide()
        this.win.reload()
      }
    })
  }

  async forward(evt: string, data?: Any) {
    if (evt === 'screen') {
      // 截图
      if (this.win && !this.win.isDestroyed()) {
        const allPlay = screen.getAllDisplays()
        const { size } = screen.getPrimaryDisplay()
        const source = await this.getScreenData(size.width, size.height, allPlay)     
        this.win.webContents.send('source-screen', source)
        this.win.show()
      }
    } else if (evt === 'screenSave' || evt === 'screenClose') {
      this.win.hide()
      this.win.reload()
    }
  }

  debug() {
    if (this.win?.isFocused()) {
      this.win?.webContents.openDevTools()
    }
  }


  async getScreenData(width: number, height: number, allPlay: Electron.Display[]) {
    const sors = await desktopCapturer.getSources({
      types: ['screen'],
      thumbnailSize: {
        width, height
      }
    })
    const allSource = []
    if (sors.length > 1) {
      const { x } = screen.getCursorScreenPoint()
      const sc = []
      for (let k = 0; k < allPlay.length; k++) {
        const el = allPlay[k];
        const X = el.bounds.x + el.bounds.width
        const obj = {
          num: X - x,
          _index: k,
          ...el
        }
        if (X - x > 0) sc.push(obj)
      }
      const array = sc.sort((a, b) => a.num - b.num)
      if (!array.length) return []
      const { id } = array[0]
      const { thumbnail } = sors.find(el => +el.display_id === id)
      allSource.push({
        width: thumbnail.getSize().width,
        height: thumbnail.getSize().height,
        base64: thumbnail.toDataURL()
      })
      this.win.setBounds(array[0].bounds)
    } else if (sors.length === 1) {
      // 一块屏
      const { thumbnail } = sors[0]
      allSource.push({
        width: thumbnail.getSize().width,
        height: thumbnail.getSize().height,
        base64: thumbnail.toDataURL()
      })
      this.win.setBounds(screen.getPrimaryDisplay().bounds)
    }

    this.win.setFullScreen(true)
    this.win.setAlwaysOnTop(true)
    return allSource
  }
}