( function ( $, mw ) {
	'use strict';

	var reloadThankedState = function() {
		$( 'a.mw-thanks-thank-link' ).each( function( idx, el ) {
			var $thankLink = $( el );
			if ( mw.thanks.thanked.contains( $thankLink ) ) {
				$thankLink.before( mw.msg( 'thanks-thanked' ) );
				$thankLink.remove();
			}
		} );
	};

	// $thankLink is the element with the data-revision-id attribute
	// $thankElement is the element to be removed on success
	var sendThanks = function( $thankLink, $thankElement ) {
		var source;
		if ( mw.config.get( 'wgAction' ) === 'history' ) {
			source = 'history';
		} else {
			source = 'diff';
		}
		( new mw.Api ).post( {
			'action' : 'thank',
			'rev' : $thankLink.attr( 'data-revision-id' ),
			'source' : source,
			'token' : mw.user.tokens.values.editToken
		} )
		.done( function( data ) {
			$thankElement.before( mw.message( 'thanks-thanked', mw.user ).escaped() );
			$thankElement.remove();
			mw.thanks.thanked.push( $thankLink );
		} )
		.fail( function( errorCode, details ) {
			// TODO: use something besides alert for the error messages
			switch( errorCode ) {
				case 'invalidrevision':
					alert( mw.msg( 'thanks-error-invalidrevision' ) );
					break;
				case 'ratelimited':
					alert( mw.msg( 'thanks-error-ratelimited', mw.user ) );
					break;
				default:
					alert( mw.msg( 'thanks-error-undefined' ) );
			}
		} );
	};

	if ( $.isReady ) {
		// This condition is required for soft-reloads
		// to also trigger the reloadThankedState
		reloadThankedState();
	} else {
		$( document ).ready( reloadThankedState );
	}

	$( function() {
		if ( mw.config.get( 'thanks-confirmation-required' ) ) {
			$( 'a.mw-thanks-thank-link' ).confirmable( {
				i18n: { confirm: mw.msg( 'thanks-confirmation2', mw.user ) },
				handler: function ( e ) {
					var $thankLink = $( this );
					e.preventDefault();
					sendThanks( $thankLink, $thankLink.closest( '.jquery-confirmable-wrapper' ) );
				}
			} );
		} else {
			$( 'a.mw-thanks-thank-link' ).click( function ( e ) {
				var $thankLink = $( this );
				e.preventDefault();
				sendThanks( $thankLink, $thankLink );
			} );
		}
	} );

} )( jQuery, mediaWiki );