const puppeteer = require('puppeteer');
const fs = require('fs').promises;


const FACEBOOK_URL = '<%POSTURL%>';


const isLoggedIn = async (page) => {
  
  const current_url_cookies = await page.cookies();
  if(current_url_cookies.filter(x=>x.name == 'c_user').length == 0){
	  
	  throw 'Not Login';
  }
};

const loginWithSession = async (cookies, page) => {
    
    await page.setCookie(...cookies);
    await page.goto(FACEBOOK_URL, { waitUntil: 'networkidle2' });
    await isLoggedIn(page).catch((error) => {

      throw error;
    });
}
 

const loginWithCredentials =  async (username, password, page) => {
			//console.log('Logging into Facebook using credentials for', username);

			await page.goto(FACEBOOK_URL, {
				waitUntil: 'networkidle2',
			});

			await page.waitForSelector('input[name=email]');
			await page.click('input[name=email]');
			await page.type('input[name=email]', username);

			await page.waitForSelector('input[name=pass]');
			await page.click('input[name=pass]');
			await page.type('input[name=pass]', password);
		
			const cookieBanner = 'div[data-testid="cookie-policy-banner"]';
			if (await page.$(cookieBanner) !== null) {
			  //console.log('Facebook cookie banner found');
			  await page.evaluate((selector) => {
				const elements = document.querySelectorAll(selector);
				for (let i = 0; i < elements.length; i += 1) {
				  elements[i].parentNode.removeChild(elements[i]);
				}
			  }, cookieBanner);
			}

	await page.waitForSelector("div[aria-label='Accessible login button']");
	await page.click("div[aria-label='Accessible login button']");
    await page.waitForNavigation();
    await isLoggedIn(page).catch((error) => {
      console.error('App is not logged into Facebook');
      throw error;
    });
  }






const getDefaultBrowser = async (headless) => {
  const browser = await puppeteer.launch({
    headless: false,
	devtools: false,
    args: ['--no-sandbox', '--disable-setuid-sandbox',"--disable-notifications"],
  });
  const context = browser.defaultBrowserContext();
  context.overridePermissions(FACEBOOK_URL, []);
  return browser;
};

const getDefaultPage = async (browser) => {
	const page = await browser.newPage();
	await page.setViewport({ width: 1920, height: 1000 });
  return page;
};

(async () => {
  const browser = await getDefaultBrowser(true);
  const page = await getDefaultPage(browser);
  const username = '<%ACCOUNT%>';
  const password = '<%ENTERCODE%>';

  // Load cookies from previous session
  const cookies = await fs.readFile('cookies.js')
    .then((facebookCookies) => JSON.parse(facebookCookies))
    .catch((error) => {
      console.error(`Unable to load FB cookies file: ${error}`);
      return {};
    });
  // use for debug
  //await page.cookies().then(async (freshCookies) => {
	 //console.log(JSON.stringify(freshCookies, null, 2));
  //});

  // Use our cookies to login. If it fails fallback to username and password login.
  if (cookies && Object.keys(cookies).length) {
    await loginWithSession(cookies, page).catch(async (error) => {
      console.error(`Unable to login using session: ${error}`);
      await loginWithCredentials(username, password, page);
    });
  } else {
    await loginWithCredentials(username, password, page);
  }

  // Save our freshest cookies that contain our Facebook session
  await page.cookies().then( async(freshCookies) => {
    await fs.writeFile('cookies.js', JSON.stringify(freshCookies, null, 2)).catch(async (error)=>{
		
		await fs.access('cookies.js', fs.F_OK);
		await fs.writeFile('cookies.js', JSON.stringify(freshCookies, null, 2));
	});
  });


	await page.waitForSelector("div[aria-label='可對此貼文採取的動作']");
		await page.click("div[aria-label='可對此貼文採取的動作']");


		await page.waitForXPath('//span[contains(text(), "編輯貼文")]'); //
		const linkEx = await page.$x('//span[contains(text(), "編輯貼文")]');


		if (linkEx.length > 0) {
			await linkEx[0].click();
		}



		await page.waitForSelector("div[aria-label='移除貼文附件']");
		await page.click("div[aria-label='移除貼文附件']");

		await page.waitForSelector("div[aria-label='相片／影片']");
		//await page.click("div[aria-label='相片／影片']");
		
		try{
			const [fileChooser] = await Promise.all([
			page.waitForFileChooser(),
			page.click("div[aria-label='相片／影片']")
			]);
			await fileChooser.cancel() ;
		}
		catch(e)
		{
			console.error(`Unable Get Dialog: ${e}`);
		}
		

		// get the ElementHandle of the selector above
		// aria-label="附加相片或影片"
		//const inputUploadHandles = await page.$x("//input[contains(@accept,'video')]");
		//	const inputUploadHandle = inputUploadHandles[0];
		await page.waitForXPath('//input[@multiple]');
		await page.waitForTimeout(2000);
		 var inputUploadHandles = await page.$x('//input[@multiple]');
		 var inputUploadHandle = inputUploadHandles[0];


		// prepare file to upload, I'm using test_to_upload.jpg file on same directory as this script
		// Photo by Ave Calvar Martinez from Pexels https://www.pexels.com/photo/lighthouse-3361704/

		const files = await Promise.all(<%UPLOAD_MEDIA_JSONARRAY%>);

		// Sets the value of the file input to fileToUpload
		await inputUploadHandle.uploadFile(...files);

		await inputUploadHandle.evaluate(upload => upload.dispatchEvent(new Event('change')));


		await page.waitForTimeout(4000);
		await page.waitForSelector("div[aria-label='儲存']");
		await page.click("div[aria-label='儲存']");
		await page.waitForTimeout(10000);

		console.log('OK');// Necessary, RPA success status check

		await page.close();
		await browser.close();

})();