# $URL$
# $Id$
logger = logging.getLogger('meresco.drilldown')
logger.debug("Starting logger")

websiteConfig = configs['website']

drilldownFieldNames = {
    'drilldown.norm.date.year':       {'en':'Year', 'nl':'Jaar'},
    'drilldown.norm.date.decennium':  {'en':'Decennium', 'nl':'Decennium'},
    'drilldown.norm.date.centennium': {'en':'Century', 'nl':'Eeuw'},

    'drilldown.norm.name.oneinitial': {'en':'Name', 'nl':'Naam'},
    'drilldown.norm.name.lastname':   {'en':'Top 10 Names', 'nl':'Top 10 Namen'},

    'drilldown.meta.repository.id':   {'en':'Repository', 'nl':'Repository'},
    'drilldown.meta.repository.repositoryGroupId':   {'en':'Source', 'nl':'Bron'},

    'drilldown.mods.classification':   {'en':'Classification', 'nl':'Classificatie'},
    'drilldown.mods.genre':           {'en':'Genre', 'nl':'Genre'},
    'drilldown.mods.language.languageTerm': {'en':'Language', 'nl':'Taal'},
    'drilldown.mods.relatedItem.titleInfo.title': {'en':'Journal/series', 'nl':'Tijdschrift/reeks'},
    'drilldown.mods.subject.topic':   {'en':'Subject', 'nl':'Onderwerp'}
}

drilldownFields = [
#####
##### TP: (field, number, sorted)
##### number == 0: all items?
    ('drilldown.mods.genre',                          0, True),
#####
    #('drilldown.mods.name.namePart', 20, False),
    #('drilldown.norm.name.oneinitial', 20, False),
    #('drilldown.meta.repository.id',                 10, False),
    ('drilldown.meta.repository.repositoryGroupId',  10, True),
    ('drilldown.mods.language.languageTerm',         10, True),
    ('drilldown.mods.relatedItem.titleInfo.title',   10, True),
    ('drilldown.mods.subject.topic',                 10, True),
    ('drilldown.mods.classification',                10, True),
]

drilldownFieldsNoMultiLevel = []
drilldownFieldsNoMultiLevel.extend(drilldownFields)
drilldownFieldsNoMultiLevel.insert(0, ('drilldown.norm.name.lastname',   10, False))
drilldownFieldsNoMultiLevel.insert(0, ('drilldown.norm.date.centennium', 10, False))

groupName = {
    'ir-uvt-nl'           : {'en': 'Tilburg University Repository', 'nl': 'Tilburg University Repository'},
    'kuleuven-be'         : {'en': 'EO: KU Leuven', 'nl': 'EO: KU Leuven'},
    'lse-ac-uk'           : {'en': 'EO: London School of Economics', 'nl': 'EO: London School of Economics'},
    'opc-uvt-nl'          : {'en': 'Catalogue', 'nl': 'Catalogus'},
    'repec-org'           : {'en': 'RePEc', 'nl': 'RePEc'},
    'repub-eur-nl'        : {'en': 'EO: Erasmus University Rotterdam', 'nl': 'EO: Erasmus Universiteit Rotterdam'},
    'tilburguniversity-nl': {'en': 'EO: Tilburg University', 'nl': 'EO: Universiteit van Tilburg'},
    'ulb-ac-be'           : {'en': 'EO: Universite Libre de Bruxelles', 'nl': 'EO: Universite Libre de Bruxelles'},
    'unimaas-nl'          : {'en': 'EO: Maastricht University', 'nl': 'EO: Universiteit Maastricht'},
}

space = "\n             "

def fieldAndTermSplit(fieldAndTerm):
    return fieldAndTerm.split(':', 1)

def fieldAndTermJoin(field, term):
    return '%s:%s' % (field, term)

def shrink(aString, maxLength=160):
    if len(aString) > maxLength:
        return aString[:maxLength] + '...'
    return aString

def createDrilldownQuery(drilldownArgs, sortKeys):
    newArguments = [];
    if sortKeys: newArguments.append(('sortKeys', sortKeys))
    for existing in drilldownArgs:
        newArguments.append(('drilldown', existing))
    return urlencode(newArguments)

def displayLabel(label):
    return '<div class="facetLabel">%s</div>' % label

def displayTerm(term, fieldName, language, maxLength=25):
    if fieldName == 'drilldown.mods.genre': term = term.replace('info:eu-repo/semantics/', '')
    elif fieldName == 'drilldown.meta.repository.repositoryGroupId':
        term = groupName.get(term, {'en':term, 'nl':term})[language]
    elif fieldName == 'drilldown.norm.date.decennium':
	to = int(term) + 9
	term = term + '-' + str(to)
    elif fieldName == 'drilldown.norm.date.centennium':
	to = int(term) + 99
	term = term + '-' + str(to)
    return shrink(term, maxLength)

def displayItem_checkbox(query, term, selected, field, language, count):
    s = space + '   <input type = "checkbox" value= "' + query
    s = s + '" title = "' + escapeHtml(term) + '" '
    if selected: s = s + 'checked="yes" '
    s = s + 'onclick = "relocateKeepQuery(this)" > '
    s = s + escapeHtml(displayTerm(term, field, language)) + ' (' + str(count) + ')'
    s = s + '</input><br>'
    return s

def displayFilter_checkbox(query, title, category, selection):
    s = space + '   <input type="checkbox" value="' + query
    s = s + '" title = "' + escapeHtml(title) + '" '
    s = s + 'checked = "yes" '
    s = s + 'onclick = "relocateKeepQuery(this)"> '
#    s = s + category+ ': '
    s = s +  escapeHtml(selection)
    s = s + '</input><br>'
    return s

def displayItem(query, term, selected, field, language, count):
    text =  escapeHtml(displayTerm(term, field, language)) + ' (' + str(count) + ')'

    if selected:
#        s = '<div class="selectedFacetItem">' + text + '</div>'
        s = ''
    else:
        s = '<div class="facetItem"><a href="?' + query + '" title="' + escapeHtml(term) + '"'
        s = s + 'onclick="return relocateKeepQueryHref(\'' + query + '\')">'
        s = s + text
        s = s + '</a></div>'
    return s

def displayItemGroep(label, termCounts, selectedFacets, fieldName, selectedFieldNames, arguments, language, sortKeys):
    s = ''
    t = ''
    for term, count in termCounts:
        if fieldName in selectedFieldNames and term in selectedFieldNames[fieldName]:
            drilldownArgs = set(selectedFacets)
            drilldownArgs.remove(fieldName + ":" + term)
            query = createDrilldownQuery(drilldownArgs, sortKeys)
            s += displayItem(query, term, True, fieldName, language, count)
        else:
            drilldownArgs = set(arguments.get('drilldown', []) + [fieldAndTermJoin(fieldName, term)])
            query = createDrilldownQuery(drilldownArgs, sortKeys)
            s += displayItem(query, term, False, fieldName, language, count)

    if (s):
            t = space + '%s' % displayLabel(label) + s

    return t


def displayFilter(query, term , category, selection):
#    logger.debug('Query:' + query)
    s = '<div class="facetItem"><a href="' + query + '" title="deselect:' + term +'" '
    s = s + 'onclick="return relocateKeepQueryHref(\'' + query +'\')">'
    s = s + '<img src="/files/close-cross.jpg" alt="deselect' + term + '"/>' + escapeHtml(selection)
    s = s + '</a></div>'
    return s


def displayDrilldownExtraLabel(levelField, selectedFieldNames,
                               drilldownFieldNames, language, selectedFacets, sortKeys, total ):
    previousUpField = ""
    s = ''
    upField = ""

    if levelField == "drilldown.norm.date.decennium" and "drilldown.norm.date.centennium" in selectedFieldNames:
        upField = "drilldown.norm.date.centennium"
    elif levelField == "drilldown.norm.date.year" and "drilldown.norm.date.centennium" in selectedFieldNames:
        upField = "drilldown.norm.date.centennium"
    elif levelField == "drilldown.norm.date.year" and "drilldown.norm.date.decennium" in selectedFieldNames:
        upField = "drilldown.norm.date.decennium"
    elif levelField == "drilldown.norm.name.oneinitial" and "drilldown.norm.name.lastname" in selectedFieldNames:
        upField = "drilldown.norm.name.lastname"
    if upField:
        for term in selectedFieldNames[upField]:
            if not (upField == previousUpField):
                label = drilldownFieldNames.get(upField, {'en':upField, 'nl':upField})[language]
                s += displayLabel(label)
            drilldownArgs = set(selectedFacets)
            drilldownArgs.remove(upField + ":" + term)
            query = createDrilldownQuery(drilldownArgs, sortKeys)
            s += displayItem(query, term, True, upField, language, total)
            previousUpField = upField
    return s

def displayDrilldownFields(total, docset, arguments, language):
    chooseFromTitle = websiteConfig.get('choosefrom')
    selectedFacets = arguments.get('drilldown', [])

    selectedFieldNames = {}
    if selectedFacets:
        for drilldownItem in selectedFacets:
            fieldName, value = fieldAndTermSplit(drilldownItem)
	    if not fieldName in selectedFieldNames: selectedFieldNames[fieldName] = []
            selectedFieldNames[fieldName].append(value)
    yield '<div id = "drilldownFields">'
    yield '<div id = drilldownFieldsTitle>' + chooseFromTitle +'</div>'

    sortKeys = arguments.get('sortKeys', [''])[0]

    if total < 500000:
####### TP: result set is not too large, multilevel results will be calculated
        multilevelResults = any.multiLevelDrilldown(docset, ['date', 'author'])
        for (fieldName, levelField), termCounts in multilevelResults:

            yield displayDrilldownExtraLabel(levelField, selectedFieldNames, drilldownFieldNames,
                                             language, selectedFacets, sortKeys, total)

            label = drilldownFieldNames.get(levelField, {'en':levelField, 'nl':levelField})[language]
            yield displayItemGroep(label, termCounts, selectedFacets, levelField, selectedFieldNames,
                                   arguments, language, sortKeys)
	fields = drilldownFields
    else:
####### TP: result set is too large, only one level of the multilevel facests will be calculated.
        fields = drilldownFieldsNoMultiLevel

    drilldownResults = any.drilldown(docset, fields)
    drilldownResultsAsDict = dict(drilldownResults)
    for fieldName, number, sorted in fields:
        termCounts = drilldownResultsAsDict.get(fieldName,[])
        label = drilldownFieldNames.get(fieldName, {'en':fieldName, 'nl':fieldName})[language]
        if termCounts == []:
            continue

        yield displayItemGroep(label, termCounts, selectedFacets, fieldName, selectedFieldNames, arguments, language, sortKeys)
    yield """
%(space)s </div>
%(space)s <! -- close drilldownfields -->""" % {'space': space}

#def main(hits, httpQuery, arguments, path='', *args, **kwargs):
# anton: httpQuery mag waarschijnlijk wel helemaal weg
#
#def main(total, bitMatrixRow, httpQuery, arguments, path='', *args, **kwargs):
def main(total, docset, httpQuery, arguments, path='', *args, **kwargs):
    language = path.startswith('/en/') and 'en' or 'nl'

    websiteConfig.setDefaults(section='drilldown', language=language)

    yield space + '<div id="drilldownresults">'
    logger.debug('arguments:\n'+prpt.pformat(arguments))

    selectedFacets = arguments.get('drilldown', [])
#    selectedLabel= any.configuration().get('limitTo','Selected:')
    selectedLabel= websiteConfig.get('limitTo',default='Selected:')

#   next line results in: TypeError: not all arguments converted during string formatting
    sortKeys = arguments.get('sortKeys', [''])[0]
    if selectedFacets:
        yield space + ' <div id="drilldownSelection">'
        yield space + '  <h4>%s</h4>' % selectedLabel
        yield '\n  <ul id="selectedFacetsList">'
        for drilldownItem in selectedFacets:
            fieldName, value = fieldAndTermSplit(drilldownItem)
            drilldownArgs = set(selectedFacets)
            drilldownArgs.remove(drilldownItem)

            label = drilldownFieldNames.get(fieldName, {'en':fieldName, 'nl':fieldName})[language]

            query = createDrilldownQuery(drilldownArgs, sortKeys)
            term = displayTerm(value, fieldName, language)

            yield displayFilter(query, value, label, term)

        yield """
%(space)s  </ul>
%(space)s </div>
%(space)s <!-- close drilldownselection -->""" % {'space': space}

    if total > 0:
        yield displayDrilldownFields(total, docset, arguments, language)