from pelican import signals
from xml.dom import minidom

collection = {}
gpx_root = '''<?xml version="1.0" encoding="UTF-8"?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" version="1.1" creator="nfc.flux.vision"></gpx>'''
kml_root = '''<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2"><Document><Folder></Folder></Document></kml>'''

def make_files(void):
    makeGPX()
    makeKML()

def makeKML():
    if len(collection) > 0:
        for category in collection:
            root = minidom.parseString(kml_root)
            folder = root.createElement('name')
            foldername = root.createTextNode( collection[category]["name"] )
            folder.appendChild( foldername )
            root.childNodes[0].childNodes[0].childNodes[0].appendChild( folder )
            for place in collection[category]["points"]:
                placemark = root.createElement('Placemark')
                name = root.createElement('name')
                title = root.createTextNode( place['name'] )
                name.appendChild( title )
                placemark.appendChild( name )
                point = root.createElement('Point')
                coordinates = root.createElement('coordinates')
                lat, lon = place['coordinates'].replace(' ', '').split(',')
                latlon = root.createTextNode( lon + ',' + lat)
                coordinates.appendChild( latlon )
                point.appendChild( coordinates )
                placemark.appendChild( point )
                root.childNodes[0].childNodes[0].childNodes[0].appendChild( placemark )
            with open('output/projects/' + category + '.kml', 'w') as xml_file:
                root.writexml(xml_file, indent="", addindent="  ", newl='\n')

def makeGPX():
    if len(collection) > 0:
        for category in collection:
            root = minidom.parseString(kml_root)
            for place in collection[category]["points"]:
                lat, lon = place['coordinates'].replace(' ', '').split(',')
                wpt = root.createElement('wpt')
                wpt.setAttribute('lat', lat)
                wpt.setAttribute('lon', lon)
                name = root.createElement('name')
                title = root.createTextNode( place['name'] )
                name.appendChild( title )
                wpt.appendChild( name )
                root.childNodes[0].appendChild( wpt )
            with open('output/projects/' + category + '.gpx', 'w') as xml_file:
                root.writexml(xml_file, indent="", addindent="  ", newl='\n')

def geodata(generator):
    for category, articles in generator.categories:
        locations = []
        for article in articles:
            if "location" in article.metadata:
                locations.append({
                    "name": article.title,
                    "coordinates": article.metadata["location"]
                    })
        collection.update({
            category.slug : {
                "name" : category.name,
                "points" : locations
            }})

def register():
    signals.article_generator_finalized.connect(geodata)
    signals.finalized.connect(make_files)