var slider = {
	width: 240,
	blockWidth: 24,
	step: 1,
	min: 0,
	max: 100,
	disabled: false,
	section: false,
	start: 0,
	end: 0,
	drag: false,
	app: false
}

function isPC() {
	if (typeof navigator !== 'object') return false;
	var userAgentInfo = navigator.userAgent;
	var Agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
	var flag = true;
	for (var v = 0; v < Agents.length - 1; v++) {
		if (userAgentInfo.indexOf(Agents[v]) > 0) {
			flag = false;
			break;
		}
	}
	return flag;
}
var isH5 = false
if (typeof window === 'object') isH5 = true

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

function format(value) {
	return Math.round(Math.max(slider.min, Math.min(value, slider.max)) / slider.step) * slider.step;
}

function setInitValue(dataset, isChange) {
	slider.drag = false
	slider.width = +dataset.width
	slider.blockWidth = +dataset.blockwidth
	slider.step = +dataset.step
	slider.min = +dataset.min
	slider.max = +dataset.max
	//H5获取bool值为undefined
	slider.disabled = (+dataset.disabled) == 1 ? true : false
	slider.section = (+dataset.section) == 1 ? true : false
	slider.start = format(+dataset.value)
	slider.end = format(+dataset.end)
	slider.app = (+dataset.app) == 1 ? true : false;
}

function touchstart(e, ins) {
	var state = e.instance.getState()
	var touch = e.touches[0] || e.changedTouches[0];
	if (isH5 && isPC()) {
		touch = e;
	}
	var dataset = e.instance.getDataset()
	state.startX = touch.clientX
	setInitValue(dataset)
}

function sectionTouchstart(e, ins) {
	var state = e.instance.getState()
	var touch = e.touches[0] || e.changedTouches[0];
	if (isH5 && isPC()) {
		touch = e;
	}
	var dataset = e.instance.getDataset()
	state.sectionStartX = touch.clientX
	setInitValue(dataset)
}

function changeValue(value, isStart, isEnd, ins) {
	var params = {
		value: value,
		isStart: isStart
	}
	if (isEnd) {
		ins.callMethod('change', params)
	} else {
		ins.callMethod('changing', params)
	}
}

function styleChange(value, ins, isEnd, state) {
	if (!ins) return;
	value = format(value);
	if (slider.section) {
		value = value > slider.end ? slider.end : value;
	}
	changeValue(value, true, isEnd, ins)
	var dvalue = slider.max - slider.min;
	var maxWidth = slider.width - slider.blockWidth;
	var width = (value - slider.min) / dvalue * maxWidth;
	var block = ins.selectComponent('.fui-slider__handle-left');
	var glided = ins.selectComponent('.fui-slider__pole-left');
	if (!block || !glided) return;
	if (state) {
		state.lastLeft = width
	}
	block.setStyle({
		transform: 'translate3d(' + width + 'px,0,0)',
		'z-index': value === slider.max ? 5 : 3
	})
	glided.setStyle({
		width: width + 'px'
	})
}

function styleSectionChange(value, ins, isEnd, state) {
	if (!ins) return;
	value = format(value);
	var total = slider.max + slider.min;
	var val = total - value;
	val = val < slider.start ? slider.start : val;
	value = total - val;
	changeValue(val, false, isEnd, ins)
	var dvalue = slider.max - slider.min;
	var maxWidth = slider.width - slider.blockWidth;
	var width = (value - slider.min) / dvalue * maxWidth;
	var block = ins.selectComponent('.fui-slider__handle-right');
	var glided = ins.selectComponent('.fui-slider__pole-right');
	if (!block || !glided) return;
	if (state) {
		state.lastSectionLeft = width
	}
	block.setStyle({
		transform: 'translate3d(-' + width + 'px,0,0)'
	})
	glided.setStyle({
		width: width + 'px'
	})
}

function touchmove(e, ins, events) {
	if (slider.disabled) return;
	if (e.preventDefault) {
		e.preventDefault()
	}
	if (slider.app && event && event.preventDefault && event.cancelable) {
		event.preventDefault()
	}
	var state = {}
	var touch = {}
	if (isH5 && isPC()) {
		touch = e;
		state = events.instance.getState()
	} else {
		touch = e.touches[0] || e.changedTouches[0]
		state = e.instance.getState()
	}
	var pageX = touch.clientX;
	slider.drag = true
	var left = pageX - state.startX + (state.lastLeft || 0);
	left = left < 0 ? 0 : left;
	var maxWidth = slider.width - slider.blockWidth;
	left = left >= maxWidth ? maxWidth : left;
	var dvalue = slider.max - slider.min;
	var value = (left / maxWidth) * dvalue + slider.min;
	state.startX = pageX
	state.lastLeft = left
	styleChange(value, ins, false)
}

function sectionTouchmove(e, ins, events) {
	if (slider.disabled) return;
	if (e.preventDefault) {
		e.preventDefault()
	}
	if (slider.app && event && event.preventDefault && event.cancelable) {
		event.preventDefault()
	}
	var state = {}
	var touch = {}
	if (isH5 && isPC()) {
		touch = e;
		state = events.instance.getState()
	} else {
		touch = e.touches[0] || e.changedTouches[0]
		state = e.instance.getState()
	}
	var pageX = touch.clientX;
	slider.drag = true
	var left = state.sectionStartX - pageX + (state.lastSectionLeft || 0);
	left = left < 0 ? 0 : left;
	var maxWidth = slider.width - slider.blockWidth;
	left = left >= maxWidth ? maxWidth : left;
	var dvalue = slider.max - slider.min;
	var value = (left / maxWidth) * dvalue + slider.min;
	state.sectionStartX = pageX
	state.lastSectionLeft = left
	styleSectionChange(value, ins, false)
}

function touchend(e, ins, event) {
	if (slider.disabled) return;
	if (slider.drag) {
		var state = {}
		if (isH5 && isPC()) {
			state = event.instance.getState()
		} else {
			state = e.instance.getState()
		}
		var maxWidth = slider.width - slider.blockWidth;
		var dvalue = slider.max - slider.min;
		var value = (state.lastLeft / maxWidth) * dvalue + slider.min;
		styleChange(value, ins, true, state)
	}
}



function sectionTouchend(e, ins, event) {
	if (slider.disabled) return;
	if (slider.drag) {
		var state = {}
		if (isH5 && isPC()) {
			state = event.instance.getState()
		} else {
			state = e.instance.getState()
		}
		var maxWidth = slider.width - slider.blockWidth;
		var dvalue = slider.max - slider.min;
		var value = (state.lastSectionLeft / maxWidth) * dvalue + slider.min;
		styleSectionChange(value, ins, true, state)
	}
}

function slidevalue(value, oldValue, owner, ins) {
	var state = ins.getState()
	state.startX = 0;
	state.lastLeft = 0;
	var dataset = ins.getDataset()
	setInitValue(dataset)
	styleChange(value, owner, true, state)
}

function sectionSlidevalue(value, oldValue, owner, ins) {
	var state = ins.getState()
	state.sectionStartX = 0;
	state.lastSectionLeft = 0;
	var dataset = ins.getDataset()
	setInitValue(dataset)
	value = slider.max - value + slider.min
	styleSectionChange(value, owner, true, state)
}
var movable = false;

function mousedown(e, ins) {
	if (!isH5 || !isPC()) return
	touchstart(e, ins)
	movable = true
	window.onmousemove = function(event) {
		if (!isH5 || !isPC() || !movable) return
		touchmove(event, ins, e)
	}
	window.onmouseup = function(event) {
		if (!isH5 || !isPC() || !movable) return
		touchend(event, ins, e)
		movable = false
	}
}

var endMovable = false;

function endMousedown(e, ins) {
	if (!isH5 || !isPC()) return
	sectionTouchstart(e, ins)
	endMovable = true
	window.onmousemove = function(event) {
		if (!isH5 || !isPC() || !endMovable) return
		sectionTouchmove(event, ins, e)
	}
	window.onmouseup = function(event) {
		if (!isH5 || !isPC()) return
		sectionTouchend(event, ins, e)
		endMovable = false
	}
}

module.exports = {
	touchstart: touchstart,
	touchmove: touchmove,
	touchend: touchend,
	mousedown: mousedown,
	slidevalue: slidevalue,
	sectionTouchstart: sectionTouchstart,
	sectionTouchmove: sectionTouchmove,
	sectionTouchend: sectionTouchend,
	endMousedown: endMousedown,
	sectionSlidevalue: sectionSlidevalue
}
