#!/usr/bin/env python
# coding=utf-8

# 
#

import unittest
import logging
import os,sys
from ConfigParser import ConfigParser
import urllib
import urlparse
from owslib import crs

OWSVIEWER_DIR=os.path.abspath(os.path.join(os.path.dirname(__file__),".."))
sys.path.append(OWSVIEWER_DIR)

from OWS import *

class TestOWS(unittest.TestCase):
    """Base class for OWS services (WFS, WCS)
    """

    owsUrl = None
    config = None
    service = None


    def setUp(self):

        # set logging
        logging.basicConfig(level=logging.DEBUG)
        
        # mapfile for original services
        mapfile = os.path.join(OWSVIEWER_DIR,"tests","mapfiles","ows.map")
        self.config = ConfigParser.ConfigParser()
        self.config.read(os.path.join(OWSVIEWER_DIR,"tests","test.cfg"))
        self.owsUrl = self._getURLWithMap(mapfile)

        os.environ.update({"QUERY_STRING":
                "owsService=%s&owsUrl=%s"%(self.service,urllib.quote(self.owsUrl))})

        self.service = getService()

    def test_bbox(self):
        """test if corect bounding box for layer will be used"""
        
        initExtent = [15, 50, 16, 51]
        class ContentsMetadata:
            boundingBoxWGS84 = initExtent
            id = "Temporary test layer"
        wcsLayer = ContentsMetadata()
        ows = OWS()
        extent = ows.getLayerExtent(wcsLayer,crs.Crs("EPSG:4326"))
        self.assertAlmostEqual(extent[0], initExtent[0])
        self.assertAlmostEqual(extent[1], initExtent[1])
        self.assertAlmostEqual(extent[2], initExtent[2])
        self.assertAlmostEqual(extent[3], initExtent[3])

        extent = ows.getLayerExtent(wcsLayer,crs.Crs("EPSG:32633"))
        self.assertAlmostEqual(extent[0], 500000.00, 0)
        self.assertAlmostEqual(extent[1], 5538630.70, 0)
        self.assertAlmostEqual(extent[2], 570168.86, 0)
        self.assertAlmostEqual(extent[3], 5650300.79, 0)

        
        



    def _getURLWithMap(self,mapfile):

        # create URL which will produce WCS and WFS services for testing
        # purposes
        owsUrl = urlparse.urlparse(self.config.get("OWSServer","owsserver"))
        owsParams = urlparse.parse_qs(owsUrl[4])
        owsParams["map"] = mapfile

        return urlparse.urlunparse((owsUrl[0],owsUrl[1],owsUrl[2], owsUrl[3],
                                     urllib.unquote(urllib.urlencode(owsParams,True)),owsUrl[5]))

    def _getWMSCapabilities(self):
        # download the WMS Capabilities
        url = self._getURLWithMap(self.service.mapfilename)
        url = urlparse.urlparse(url)
        params = urlparse.parse_qs(url[4])
        params["REQUEST"] = "GetCapabilities"
        params["SERVICE"] = "WMS"
        params = urllib.unquote(urllib.urlencode(params,True))
        attrs = (url[0],url[1],url[2],url[3],params,url[5])
        logging.debug("GetCapabilities URL: " + urlparse.urlunparse(attrs))
        resp = objectify.parse(urllib.urlopen(urlparse.urlunparse(attrs)))
        return resp.getroot()