var slideBarWidth = 200;
var slideBlockWidth = 32;
var errorRange = 2
var disabled = false

function bool(str) {
	return str === 'true' || str == true ? true : false
}

function touchstart(e, ins) {
	var state = e.instance.getState()
	var touch = e.touches[0] || e.changedTouches[0]
	var dataset = e.instance.getDataset()
	state.startX = touch.pageX
	slideBarWidth = +dataset.slidebarwidth
	slideBlockWidth = +dataset.slideblockwidth
	errorRange = +dataset.errorrange
	disabled = bool(dataset.disabled)
}

function styleChange(left, ins) {
	if (!ins) return;
	var block = ins.selectComponent('.tui-slider-block');
	var glided=ins.selectComponent('.tui-slide-glided');
	if (left === 0) {
		block.addClass('tui-block__trans')
		glided.addClass('tui-block__trans')
	} else {
		block.removeClass('tui-block__trans')
		glided.removeClass('tui-block__trans')
	}
	block.setStyle({
		transform: 'translate3d(' + left + 'px,0,0)'
	})
	glided.setStyle({
		width: left + 'px'
	})
}

function touchmove(e, ins) {
	if (disabled) return;
	var state = e.instance.getState()
	var touch = e.touches[0] || e.changedTouches[0]
	var pageX = touch.pageX;
	var left = pageX - state.startX + (state.lastLeft || 0);
	left = left < 0 ? 0 : left;
	var width = slideBarWidth - slideBlockWidth;
	left = left >= width ? width : left;
	state.startX = pageX
	state.lastLeft = left
	styleChange(left, ins)
}

function touchend(e, ins) {
	if (disabled) return;
	var state = e.instance.getState()
	var left = slideBarWidth - slideBlockWidth
	if (left - state.lastLeft <= errorRange) {
		styleChange(left, ins)
		ins.callMethod('success')
	} else {
		state.startX = 0;
		state.lastLeft = 0;
		styleChange(0, ins)
	}
}

function slidereset(reset, oldreset, owner, ins) {
	var state = ins.getState()
	if (reset > 0) {
		state.startX = 0;
		state.lastLeft = 0;
		styleChange(0, owner)
	}
}

module.exports = {
	touchstart: touchstart,
	touchmove: touchmove,
	touchend: touchend,
	slidereset: slidereset
}