/**
 * 布局插件，采用 左 右 上 下 中 5块方式布局；中是必须有的
 * 默认 布局区域为自适应父级高和宽
 * resizable 是否可以改变尺寸 默认 false
 * height    设置上下区域块高度 默认 80
 * width     设置左右区域块宽度 默认 180
 */
(function ($) {
	"use strict"

	var _layout = {
		top: function ($this, $mid, $div, op) {
			op.height && $div.css({ 'height': op.height })
			var h = $div.outerHeight()
			if (op.resizable) {
				$this.addClass('ce-layout-resizable-top')
				h += 4
				$div.append('<div class="ce-layout-move ce-layout-move-top" ce-type="top"  ></div>')
			}
			$this.css({ 'padding-top': h }).addClass('ce-layout-hasTop')

			// 添加标题
			op.title && $div.append('<div class="ce-layout-title" >' + op.title + '</div>')
		},
		bottom: function ($this, $mid, $div, op) {
			op.height && $div.css({ 'height': op.height })
			var h = $div.outerHeight()
			if (op.resizable) {
				$this.addClass('ce-layout-resizable-bottom')
				h += 4
				$div.append('<div class="ce-layout-move ce-layout-move-bottom" ce-type="bottom" ></div>')
			}

			$this.css({ 'padding-bottom': h }).addClass('ce-layout-hasBottom')

			// 添加标题
			op.title && $div.append('<div class="ce-layout-title" >' + op.title + '</div>')
		},
		left: function ($this, $mid, $div, op) {
			op.width && $div.css({ 'width': op.width })
			var w = $div.outerWidth()
			if (op.resizable) {
				$this.addClass('ce-layout-resizable-left')
				w += 4
				$div.append('<div class="ce-layout-move ce-layout-move-left" ce-type="left" ></div>')
			}
			$this.addClass('ce-layout-hasLeft')
			$mid.css({ 'padding-left': w })
			$mid.append($div)

			// 添加标题
			op.title && $div.append('<div class="ce-layout-title" >' + op.title + '</div>')
		},
		right: function ($this, $mid, $div, op) {
			op.width && $div.css({ 'width': op.width })
			var w = $div.outerWidth()
			if (op.resizable) {
				$this.addClass('ce-layout-resizable-right')
				w += 4
				$div.append('<div class="ce-layout-move ce-layout-move-right" ce-type="right" ></div>')
			}
			$this.addClass('ce-layout-hasRight')
			$mid.css({ 'padding-right': w })
			$mid.append($div)

			// 添加标题
			op.title && $div.append('<div class="ce-layout-title" >' + op.title + '</div>')
		},
		center: function ($this, $mid, $div, op) {
			$mid.append($div)

			// 添加标题
			op.title && $div.append('<div class="ce-layout-title" >' + op.title + '</div>')
		}
	}
	var _getHW = function (max, hw) {
		if (hw < 10) {
			hw = 10
		}
		if (hw > max) {
			hw = max
		}

		return hw
	}

	var _layoutMoving = {
		top: function ($this, op, e) {
			var h = op._size + (e.pageY - op._pageY)
			h = _getHW(op._maxsize, h)
			$this.children('.ce-layout-top').css('height', h)
			$this.css('padding-top', h + 4)
		},
		bottom: function ($this, op, e) {
			var h = op._size - (e.pageY - op._pageY)
			h = _getHW(op._maxsize, h)
			$this.children('.ce-layout-bottom').css('height', h)
			$this.css('padding-bottom', h + 4)
		},
		left: function ($this, op, e) {
			var w = op._size + (e.pageX - op._pageX)
			w = _getHW(op._maxsize, w)
			$this.children('.ce-layout-mid').children('.ce-layout-left').css('width', w)
			$this.children('.ce-layout-mid').css('padding-left', w + 4)
		},
		right: function ($this, op, e) {
			var w = op._size - (e.pageX - op._pageX)
			w = _getHW(op._maxsize, w)
			$this.children('.ce-layout-mid').children('.ce-layout-right').css('width', w)
			$this.children('.ce-layout-mid').css('padding-right', w + 4)
		}
	}

	$.fn.celayout = function (op) {
		var $this = $(this)
		op = op || {}
		$this.addClass('ce-layout-box').addClass('ce-layout')
		var $mid = $('<div class="ce-layout-box ce-layout-mid" ></div>')
		var hasCenter = false
		$this.children().each(function () {
			var $div = $(this)
			var type = $div.attr('data-type')
			$div.addClass('ce-layout-box').addClass('ce-layout-' + type)
			if (type == 'center') {
				hasCenter = true
			}
			if (_layout[type]) {
				op[type] = $.extend({
					resizable: false // 支持 上下左右 4个模块
				}, op[type] || {})
				_layout[type]($this, $mid, $div, op[type])
			}
			else {
				console.warn('区域类型【' + type + '】不支持!')
			}
		})
		$this.append($mid)
		if (!hasCenter) {
			console.warn('没有中间区域模块，请添加!')
		}

		$this[0]._op = op

		// 绑定事件
		$this.on('mousedown', function (e) {
			e = e || window.event
			var et = e.target || e.srcElement
			var $et = $(et)
			var $layout = $(this)
			var op = $layout[0]._op
			if ($et.hasClass('ce-layout-move')) {
				var type = $et.attr('ce-type')
				op._moveType = type
				op._ismove = true
				op._pageX = e.pageX
				op._pageY = e.pageY
				if (type == 'top' || type == 'bottom') {
					op._size = $et.parent().outerHeight()
					op._maxsize = op._size + $this.children('.ce-layout-mid').children('.ce-layout-center').outerHeight()
				}
				else {
					op._size = $et.parent().outerWidth()
					op._maxsize = op._size + $this.children('.ce-layout-mid').children('.ce-layout-center').outerWidth()
				}
			}
		})

		$this.mousemove(function (e) {
			e = e || window.event
			var $this = $(this);
			var op = $this[0]._op
			if (op._ismove) {
				_layoutMoving[op._moveType] && _layoutMoving[op._moveType]($this, op, e)
			}
		})

		$this.on('click', function (e) {
			e = e || window.event
			var $this = $(this)
			var op = $this[0]._op
			if (op._ismove) {
				op._ismove = false
			}
		})
	}

	$.fn.celayoutSet = function () {
	}
})(jQuery);