import i18n from 'i18n-calypso';
import moment from 'moment';
import { gaRecordEvent } from 'calypso/lib/analytics/ga';
import { bumpStat } from 'calypso/lib/analytics/mc';
import { recordPageView } from 'calypso/lib/analytics/page-view';
import { recordTrack } from 'calypso/reader/stats';
import { setDocumentHeadTitle as setTitle } from 'calypso/state/document-head/actions';

export function trackPageLoad( path, title, readerView ) {
	recordPageView( path, title );
	bumpStat( 'reader_views', readerView === 'full_post' ? readerView : readerView + '_load' );
}

export function getStartDate( context ) {
	if ( context.query && context.query.at ) {
		const startDate = moment( context.query.at );
		return startDate.isValid() ? startDate.toISOString() : null;
	}

	return null;
}

export function trackScrollPage( path, title, category, readerView, pageNum ) {
	gaRecordEvent( category, 'Loaded Next Page', 'page', pageNum );
	recordTrack( 'calypso_reader_infinite_scroll_performed', {
		path: path,
		page: pageNum,
		section: readerView,
	} );
	recordPageView( path, title );
	bumpStat( 'reader_views', readerView + '_scroll' );
}

export function trackUpdatesLoaded( key ) {
	bumpStat( 'reader_views', key + '_load_new' );
	gaRecordEvent( 'Reader', 'Clicked Load New Posts', key );
	recordTrack( 'calypso_reader_load_new_posts', {
		section: key,
	} );
}

export function setPageTitle( context, title ) {
	// @todo Auto-converted from the setTitle action. Please use <DocumentHead> instead.
	context.store.dispatch(
		setTitle(
			i18n.translate( '%s ‹ Reader', {
				args: title,
				comment: '%s is the section name. For example: "My Likes"',
			} )
		)
	);
}