import org.springframework.web.servlet.support.RequestContextUtils as RCU

/**
 * This tag enables pagination on the list asynchronously with jquery libraries.
 * based on the Facncy jQuery pagination plugin by Cody@
 * http://tympanus.net/codrops/2009/11/17/jpaginate-a-fancy-jquery-pagination-plugin/
 * @author Alidad Soleimani (alidad@dorisa.com)
 */
class JPaginationTagLib {
    // tags:
    //     total       : Total number of records
    //     update       : The id of the element to be updated with reponse
    //     action      : The action to send the request
    //     controller : The controller to for the request (optional)
    //       offset        : The offset for the records the default is 0
    //     max        : Max number of records to display
    //     startOffset: starting page (optional)

    def remoteJPaginate = {attrs ->
        def writer = out

        if (attrs.total == null)
            throwTagError("Tag [remoteJPaginate] is missing required attribute [total]")

        if (attrs.update == null)
            throwTagError("Tag [remoteJPaginate] is missing required attribute [update]")

        if (!attrs.action)
            throwTagError("Tag [remoteJPaginate] is missing required attribute [action]")

        def messageSource = grailsAttributes.getApplicationContext().getBean("messageSource")
        def locale = RCU.getLocale(request)

        def total = attrs.total.toInteger()
        def offset = params.offset?.toInteger()
        def max = params.max?.toInteger()
        def startOffset =  params.startOffset?.toInteger()
        def linkTagAttrs = attrs
        def border = params.border?:false
        def display  = params.display?.toInteger()

        Integer count = (total/max)+1
        if (!offset) offset = (attrs.offset ? attrs.offset.toInteger() : 0)
        if (!max) max = (attrs.max ? attrs.max.toInteger() : 10)
        if (!startOffset) startOffset = (attrs.startOffset ? attrs.startOffset.toInteger() : 1)
        if (!display) display = (attrs.display ? attrs.display.toInteger() : 11)
        def linkParams = [offset: offset - max, max: max]
        def selectParams = [:]
        if (params.sort) linkParams.sort = params.sort
        if (params.order) linkParams.order = params.order

        if (attrs.params) {
            linkParams.putAll(attrs.params)
            selectParams.putAll(linkParams)
        }


        writer << "<script type='text/javascript'>"
        writer << "\$(function() {"
        writer << "    \$('#paginatedDiv').paginate({"
        writer << "        count         : ${count},"
        writer << "        start         : ${startOffset},"
        writer << "        display     : ${display},"
        writer << "        border                    : ${border},"
        writer << "        text_color              : '#888',"
        writer << "        background_color        : '#EEE',"
        writer << "        text_hover_color          : 'black',"
        writer << "        background_hover_color    : '#CFCFCF',"
        writer << "        images        : false,"
        writer << "        mouse        : 'press',"
        writer << "        onChange    :  function(page){"
        writer << "     var pageOffset = (page-1)* ${max} + eval(${offset}) ;"
        writer << " \$.ajax({"
        writer << "url: '"
        writer << createLink(linkTagAttrs)
        writer << "',context: document.body,"
        writer << " data: 'page='+ page + '&offset=' + pageOffset + '&max=${max}',"
        writer << " cache:false,"
        writer << "success: function(response){ \$('#listTemplateDivId').html(response) }"
        writer <<  " });"
        writer << "}"
        writer << "    })"
        writer << "    });"
        writer << "</script>"
        writer << "    <div id='paginatedDiv'></div>"

    }
}