if (typeof module != 'undefined') {
	module.exports = {
		Driver: Driver,
	}
}


function Driver(w3, lo, filters, syncer, callback) {
	this.w3 = w3
	this.lo = lo;
	this.hi = undefined;
	this.filters = filters;
	this.syncer = syncer;
	this.callback = callback
}

Driver.prototype.start = function(hi) {
	const self = this;

	if (hi !== undefined) {
		self.sync(hi);
		return;
	}
	self.w3.eth.getBlockNumber().then(function(n) {
		self.sync(n);
	}).catch((e) => {
		console.error('blocknumber fail', e);
	});
};

Driver.prototype.sync = function(n) {
	const self = this;

	self.hi = n;

	const countGetter = async (b) => {
		return await self.getCount(b);
	};

	const processor = async (b, t) => {
		return await self.process(b, t);
	}
	self.syncer(self, self.lo, self.hi, self.filters[0], self.filters[1], countGetter, processor);
};


Driver.prototype.process = function(b, t) {
	const self = this;

	self.w3.eth.getTransactionFromBlock(b, t).then((t) => {
		self.w3.eth.getTransactionReceipt(t.hash).then((r) => {
		  console.log('Receipt: ', r)
			self.callback(r);
		}).catch((e) => {
			console.error('fail get receipt', e);
		});
	}).catch(function(e) {
		//this.postMessage(['failed getTransactionFromBlock(' + b + ', ' + t + ')']);
		self.callback([undefined]);
		console.error('failed getTransactionFromBlock(' + b + ', ' + t + ')');
	});
}

Driver.prototype.getCount = async function (b) {
	const self = this;

	const n = await self.w3.eth.getBlockTransactionCount(b);
	return n;
};