import { CMStepCounter } from 'CoreMotion';
import { NSError, OperationQueue } from 'Foundation';

type StartStepCountingUpdatesOptions = {
	stepCounts: Int | null;
	handler: (numberOfSteps : Int, timestamp : Date, error : NSError | null) => void;
}

type QueryStepCountStartingOptions = {
	start: Date | null,
	end: Date | null,
	handler: (numberOfSteps : Int, error : NSError | null) => void
}

let stepCounter = new CMStepCounter()

export function startStepCountingUpdates(options: StartStepCountingUpdatesOptions) {
	if (options.stepCounts == null) {
		options.stepCounts = 1
	}
	
	stepCounter.startStepCountingUpdates(to = OperationQueue.main, updateOn = options.stepCounts!, withHandler = options.handler)
}

export function stopStepCountingUpdates() {
	stepCounter.stopStepCountingUpdates()
}

export function queryStepCountStarting(options: QueryStepCountStartingOptions) {
	if (options.start == null) {
		let start = new Date()
		start.setHours(0)
		start.setMinutes(0)
		start.setSeconds(0)
		start.setMilliseconds(0)
		options.start = start
	}

	if (options.end == null) {
		options.end = new Date()
	}

	stepCounter.queryStepCountStarting(from = options.start!, to = options.end!, to = OperationQueue.main, withHandler = options.handler)
}

export function isStepCountingAvailable() {
	CMStepCounter.isStepCountingAvailable()
}