let window = self;

importScripts('moolb.js');
importScripts('sync.js');
importScripts('web3.min.js');

let s = undefined;

// TODO: as worker has its own scope we don't need the object
function Driver(messager, provider, lo, filters, syncer) {
	this.w3 = new Web3(provider);
	this.lo = lo;
	this.hi = lo;
	this.filters = filters;
	this.syncer = syncer;
	this.messager = messager;
}

Driver.prototype.start = function(hi) {
	let self = this;
	if (hi !== undefined) {
		self.sync(hi);
		return;
	}
	s.w3.eth.getBlockNumber().then(function(n) {
		self.sync(n);
	});
};

Driver.prototype.sync = function(n) {
	this.hi = n;
	this.syncer(this, this.lo, this.hi, this.filters[0], this.filters[1], this.getCount, this.process);
};


Driver.prototype.process = function(b, t) {
	s.w3.eth.getTransactionFromBlock(b, t).then((t) => {
		s.w3.eth.getTransactionReceipt(t.hash).then((r) => {
			this.postMessage(r);
		});
	}).catch(function(e) {
		//this.postMessage(['failed getTransactionFromBlock(' + b + ', ' + t + ')']);
		console.error('failed getTransactionFromBlock(' + b + ', ' + t + ')');
	});
}

Driver.prototype.getCount = async function (b) {
	const n = s.w3.eth.getBlockTransactionCount(b);
	return n;
};

onmessage = function(o) {
	const filters = [
		bloomFromBytes(o.data.filters[0], o.data.filter_rounds),
		bloomFromBytes(o.data.filters[1], o.data.filter_rounds),
	];
	s = new Driver(postMessage, o.data.w3_provider, o.data.lo, filters, sync_by_filter);
	let hi = undefined;
	if (o.data.hi > 0) {
		hi = o.data.hi;
	}
	s.start(hi);
};