/*
   create by yangjinhua
   data:2016-11-04
 */
define(function(require, exports, module) {

	require('./pagination.css')
	var tpl = require('./pagination.tpl')

	function Pagination(args) {
		this.$container = args.container;
		this.$container.append(tpl);
		this.actions = args.actions;
		this.pageSize = args.pageSize;
		this.totalRows = args.totalRows;
		this.pageIndex = 1;
		this.pageCount = Math.ceil(args.totalRows / args.pageSize);
		this.init();
		this.addEvents();
	}

	Pagination.prototype.init = function() {
		var self = this;
		var container = this.$container.find('.fdpr-pagination-container');
		//初始化页码
		self.setRefreshPages(0, self.pageSize, self.totalRows)



		//首页
		var $btnFirstPage = container.find('.edp-first');

		$btnFirstPage.on('click', function() {
			if ($(this).hasClass('pagi-button-disabled')) return;
			if (self.actions.click && typeof self.actions.click == 'function') {
				self.pageIndex = 1;
				self.actions.click('firstPage', self.pageIndex - 1);
			}
		});

		//上一页
		var $btnPrevPage = container.find('.edp-previous');
		$btnPrevPage.on('click', function() {
			if ($(this).hasClass('pagi-button-disabled')) return;
			if (self.actions.click && typeof self.actions.click == 'function') {
				self.pageIndex = parseInt(self.pageIndex - 1);
				self.actions.click('prevPage', self.pageIndex - 1);
			}
		});

		//下一页
		var $btnNextPage = container.find('.edp-next');
		$btnNextPage.on('click', function() {
			if ($(this).hasClass('pagi-button-disabled')) return;
			if (self.actions.click && typeof self.actions.click == 'function') {
				self.pageIndex = parseInt(self.pageIndex + 1);
				self.actions.click('nextPage', self.pageIndex - 1);
			}
		});

		//末页
		var $btnLastPage = container.find('.edp-last');
		$btnLastPage.on('click', function() {
			if ($(this).hasClass('pagi-button-disabled')) return;
			if (self.actions.click && typeof self.actions.click == 'function') {
				self.pageIndex = parseInt(self.pageCount);
				self.actions.click('lastPage', self.pageCount - 1);
			}
		});

		//跳转
		var $btnLinkPage = container.find('.edp-link');

		$btnLinkPage.on('click', function() {
			if ($(this).hasClass('pagi-button-disabled')) return;
			var linkPage = parseInt(container.find('.edp-pagination').val());
			if ( isNaN(linkPage) ) {
				ER.messager.err('必须输入数字!');
				container.find('.edp-pagination').val('');
				return;
			}
			if (linkPage === self.pageIndex) return;

			if (linkPage === NaN || container.find('.edp-pagination').val() === '') {
				ER.messager.tip('跳转页码不能为空 ，请输入。');
				return;
			}
			if (linkPage < 1) {
				ER.messager.tip('跳转页码不能小于1 ，请重新输入。');
				return;
			}
			if (linkPage > self.pageCount) {
				ER.messager.tip('跳转页码不能大于最大页数 ，请重新输入。');
				return;
			}

			if (self.actions.click && typeof self.actions.click == 'function') {
				self.pageIndex = linkPage;
				self.actions.click('linkPage', self.pageIndex - 1);
			}
		});

	};

	Pagination.prototype.addEvents = function() {
		var container = this.$container.find('.fdpr-pagination-container');
		ER.bindVKEvents(container.find('.edp-pagination')[0]);
	};

	/**
	 * 初始化按钮可用性
	 * @return {[type]} [description]
	 */
	Pagination.prototype.initBtnDisable = function() {
		var self = this;
		var pageContainer = this.$container.find('.fdpr-pagination-container');
		if (self.pageIndex === 1 && (self.pageCount === 0 || self.pageCount === 1)) {
			pageContainer.find('.edp-first').addClass('pagi-button-disabled');
			pageContainer.find('.edp-previous').addClass('pagi-button-disabled');
			pageContainer.find('.edp-next').addClass('pagi-button-disabled');
			pageContainer.find('.edp-last').addClass('pagi-button-disabled');
			pageContainer.find('.edp-link').addClass('pagi-button-disabled');
		} else if (self.pageIndex === 1) {
			pageContainer.find('.edp-first').addClass('pagi-button-disabled');
			pageContainer.find('.edp-previous').addClass('pagi-button-disabled');
			pageContainer.find('.edp-next').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-last').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-link').removeClass('pagi-button-disabled');
		} else if (self.pageIndex === self.pageCount) {
			pageContainer.find('.edp-first').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-previous').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-next').addClass('pagi-button-disabled');
			pageContainer.find('.edp-last').addClass('pagi-button-disabled');
			pageContainer.find('.edp-link').removeClass('pagi-button-disabled');
		} else {
			pageContainer.find('.edp-first').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-previous').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-next').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-last').removeClass('pagi-button-disabled');
			pageContainer.find('.edp-link').removeClass('pagi-button-disabled');
		}
	}

	/**
	 * [初始化页码及按钮可用性]
	 * @param {[type]} 页码（从0开始） [description]
	 * @param {[type]} 每页显示数  [description]
	 * @param {[type]} 总数据条数 [description]
	 */
	Pagination.prototype.setRefreshPages = function(pageIndex, pageSize, totalRows) {
		var self = this;
		var pageContainer = this.$container.find('.fdpr-pagination-container');
		var pageCount = Math.ceil(totalRows / pageSize)
		var $pagesize = pageContainer.find('.edp-pageNumber');
		$pagesize.text(pageSize);

		var $totalRows = pageContainer.find('.edp-allNum');
		$totalRows.text(totalRows);

		var $pageIndex = pageContainer.find('.edp-currentPage');
		$pageIndex.text(pageIndex + 1);
		self.pageIndex = pageIndex + 1;

		var $pageCount = pageContainer.find('.edp-allPage');
		$pageCount.text(pageCount);
		self.pageCount = pageCount;

		this.initBtnDisable();
	}

	/**
	 * [获取分页信息]
	 * @return {[type]} [description]
	 */
	Pagination.prototype.getPageInfo = function() {
		return {
			pageIndex: this.pageIndex,
			pageCount: this.pageCount,
			pagesize: this.pagesize,
			totalRows: this.totalRows
		};
	};

	return Pagination;
});