/* global Gravatar */

function getAvatarSuggestionForUser(user) {
	check(user, Object);

	const avatars = [];

	if (user.services.facebook && user.services.facebook.id && RocketChat.settings.get('Accounts_OAuth_Facebook')) {
		avatars.push({
			service: 'facebook',
			url: 'https://graph.facebook.com/' + user.services.facebook.id + '/picture?type=large'
		});
	}

	if (user.services.google && user.services.google.picture && user.services.google.picture !== 'https://lh3.googleusercontent.com/-XdUIqdMkCWA/AAAAAAAAAAI/AAAAAAAAAAA/4252rscbv5M/photo.jpg' && RocketChat.settings.get('Accounts_OAuth_Google')) {
		avatars.push({
			service: 'google',
			url: user.services.google.picture
		});
	}

	if (user.services.github && user.services.github.username && RocketChat.settings.get('Accounts_OAuth_Github')) {
		avatars.push({
			service: 'github',
			url: 'https://avatars.githubusercontent.com/' + user.services.github.username + '?s=200'
		});
	}

	if (user.services.linkedin && user.services.linkedin.pictureUrl && RocketChat.settings.get('Accounts_OAuth_Linkedin')) {
		avatars.push({
			service: 'linkedin',
			url: user.services.linkedin.pictureUrl
		});
	}

	if (user.services.twitter && user.services.twitter.profile_image_url_https && RocketChat.settings.get('Accounts_OAuth_Twitter')) {
		avatars.push({
			service: 'twitter',
			url: user.services.twitter.profile_image_url_https.replace(/_normal|_bigger/, '')
		});
	}

	if (user.services.gitlab && user.services.gitlab.avatar_url && RocketChat.settings.get('Accounts_OAuth_Gitlab')) {
		avatars.push({
			service: 'gitlab',
			url: user.services.gitlab.avatar_url
		});
	}

	if (user.services.sandstorm && user.services.sandstorm.picture && Meteor.settings['public'].sandstorm) {
		avatars.push({
			service: 'sandstorm',
			url: user.services.sandstorm.picture
		});
	}

	if (user.emails && user.emails.length > 0) {
		for (const email of user.emails) {
			if (email.verified === true) {
				avatars.push({
					service: 'gravatar',
					url: Gravatar.imageUrl(email.address, {
						'default': '404',
						size: 200,
						secure: true
					})
				});
			}

			if (email.verified !== true) {
				avatars.push({
					service: 'gravatar',
					url: Gravatar.imageUrl(email.address, {
						'default': '404',
						size: 200,
						secure: true
					})
				});
			}
		}
	}

	const validAvatars = {};
	for (const avatar of avatars) {
		try {
			const result = HTTP.get(avatar.url, {
				npmRequestOptions: {
					encoding: 'binary'
				}
			});

			if (result.statusCode === 200) {
				let blob = 'data:' + result.headers['content-type'] + ';base64,';
				blob += Buffer.from(result.content, 'binary').toString('base64');
				avatar.blob = blob;
				avatar.contentType = result.headers['content-type'];
				validAvatars[avatar.service] = avatar;
			}
		} catch (error) {
			// error;
		}
	}
	return validAvatars;
}

this.getAvatarSuggestionForUser = getAvatarSuggestionForUser;

Meteor.methods({
	getAvatarSuggestion() {
		if (!Meteor.userId()) {
			throw new Meteor.Error('error-invalid-user', 'Invalid user', {
				method: 'getAvatarSuggestion'
			});
		}

		this.unblock();

		const user = Meteor.user();

		return getAvatarSuggestionForUser(user);
	}
});