import makeJsonSchemaParser from 'calypso/lib/make-json-schema-parser';
import { REWIND_STATE_REQUEST, REWIND_STATE_UPDATE } from 'calypso/state/action-types';
import { recordTracksEvent, withAnalytics } from 'calypso/state/analytics/actions';
import { registerHandlers } from 'calypso/state/data-layer/handler-registry';
import { http } from 'calypso/state/data-layer/wpcom-http/actions';
import { dispatchRequest } from 'calypso/state/data-layer/wpcom-http/utils';
import { requestRewindState } from 'calypso/state/rewind/state/actions';
import { transformApi } from './api-transformer';
import { rewindStatus } from './schema';

const getType = ( o ) => ( o && o.constructor && o.constructor.name ) || typeof o;

const fetchRewindState = ( action ) =>
	http(
		{
			apiNamespace: 'wpcom/v2',
			method: 'GET',
			path: `/sites/${ action.siteId }/rewind`,
			query: {
				force: 'wpcom',
			},
		},
		action
	);

const updateRewindState = ( { siteId }, data ) => {
	const stateUpdate = {
		type: REWIND_STATE_UPDATE,
		siteId,
		data,
	};

	const hasRunningRewind =
		data.rewind && ( data.rewind.status === 'queued' || data.rewind.status === 'running' );

	if ( ! hasRunningRewind ) {
		return stateUpdate;
	}

	const delayedStateRequest = ( dispatch ) =>
		setTimeout( () => dispatch( requestRewindState( siteId ) ), 3000 );

	return [ stateUpdate, delayedStateRequest ];
};

const setUnknownState = ( { siteId }, error ) => {
	const httpStatus = error.hasOwnProperty( 'status' ) ? parseInt( error.status, 10 ) : null;

	// these are indicative of a network request
	if (
		error.hasOwnProperty( 'code' ) &&
		error.hasOwnProperty( 'message' ) &&
		httpStatus &&
		httpStatus >= 400 // bad HTTP responses, could be 4xx or 5xx
	) {
		return withAnalytics(
			recordTracksEvent( 'calypso_rewind_state_bad_response', {
				error_code: error.code,
				error_message: error.message,
				error_status: error.status,
			} ),
			{
				type: REWIND_STATE_UPDATE,
				siteId,
				data: {
					state: 'unavailable',
					reason: 'unknown',
					lastUpdated: new Date(),
				},
			}
		);
	}

	return withAnalytics(
		recordTracksEvent( 'calypso_rewind_state_parse_error', {
			type: getType( error ),
			error: JSON.stringify( error ),
		} ),
		{
			type: REWIND_STATE_UPDATE,
			siteId,
			data: {
				state: 'unknown',
				lastUpdated: new Date(),
			},
		}
	);
};

registerHandlers( 'state/data-layer/wpcom/sites/rewind', {
	[ REWIND_STATE_REQUEST ]: [
		dispatchRequest( {
			fetch: fetchRewindState,
			onSuccess: updateRewindState,
			onError: setUnknownState,
			fromApi: makeJsonSchemaParser( rewindStatus, transformApi ),
		} ),
	],
} );