# -*- coding: utf-8 -*-
# models.py

# All standard Django fields as well as GeoDjango geometry fields and the GeoManager() can be
# imported from django.contrib.gis.db after adding django.contrib.gis to INSTALLED_APPS
from django.contrib.gis.db import models
from django.contrib.sitemaps import Sitemap
# Used to display html 'help text' links within Admin App
from django.utils.safestring import mark_safe

class Region(models.Model):
    name = models.CharField(max_length=50, )
    slug = models.SlugField()
    pub_date = models.DateTimeField('Date published',null=True)
    # GeoDjango specific Polygon Field and GeoManager
    geometry = models.MultiPolygonField(srid=4326, null=True)
    lon = models.FloatField('Longitude',help_text="Longitude of centerpoint",null=True)
    lat = models.FloatField('Latitude',help_text="Latitude of centerpoint",null=True)
    zoom_level = models.CharField(max_length=2,null=True)
    # GeoManager, a subclass that adds a rich set of geospatial queryset methods
    objects = models.GeoManager()
        
    def get_absolute_url(self):
        return "/locations/region/%s/" % (self.slug)
        
    def __unicode__(self): return self.name


# imported from django.contrib.gis.db
from django.contrib.gis.db import models

# Used to display html 'help text' links within Admin App
from django.utils.safestring import mark_safe

class Country(models.Model):
    """
    
    A geographic model based on the v3 of the simplified world borders multipolygon shapefile
    from http://thematicmapping.org/downloads/world_borders.php.
    
    Field names, Django types, and max_lengths were autogenerated using the ogrinspect utility with hand
    edits to add alternative field names and help_text.
    
    Imported using LayerMapping (requires GDAL) called within the load_data.py script provided
    within this sample project.
    
    All fields match the source dataset, an ESRI format shapefile made up of several related files:
    .shp - holds the vector data that is to be stored in the MultiPolygonField field named'geometry'.
    .shx - spatial index file for geometries stored in the .shp.
    .dbf - database file for holding attribute data (can be opened in excel and open office).
    .prj - contains the spatial reference information for the geometries stored in the .shp
      

    """
    
    # Regular Django fields corresponding to the attributes in the
    # world borders shapefile
    name = models.CharField(max_length=50)
    area = models.IntegerField(help_text="Area of Country in SQ meters")
    pop2005 = models.IntegerField('Population 2005')
    fips = models.CharField('FIPS Code', max_length=2, help_text=mark_safe('<a href="http://www.census.gov/geo/www/fips/fips.html">Federal Information Processing Standard Code</a>'))
    iso2 = models.CharField('2 Digit ISO', max_length=2, help_text=mark_safe('<a href="http://www.iso.org/">International Organization for Standardization</a>' ))
    iso3 = models.CharField('3 Digit ISO', max_length=3,help_text=mark_safe('<a href="http://www.iso.org/">International Organization for Standardization</a>' ))
    un = models.IntegerField('United Nations Code')
    REGION_CODES = (
        (0, 'MISC'),
        (2, 'Africa'),
        (9, 'Oceania'),
        (19, 'Americas'),
        (142, 'Asia'),
        (150, 'Europe'),
    )
    SUBREGION_CODES = (
        (0, 'MISC'),
        (5, 'South America'),
        (11, 'Western Africa'),
        (13, 'Central America'),
        (14, 'Eastern Africa'),
        (15, 'Northern Africa'),
        (17, 'Middle Africa'),
        (18, 'Southern Africa'),
        (21, 'North America'),
        (29, 'Caribbean'),
        (30, 'Eastern Asia'),
        (34, 'Southern Asia'),
        (35, 'Southeast Asia'),
        (39, 'Southern Europe'),
        (53, 'Australia and New Zealand'),
        (54, 'Melanesia'),
        (57, 'Micronesia'),
        (61, 'Polynesia'),
        (143, 'Central Asia'),
        (145, 'Western Asia'),
        (151, 'Eastern Europe'),
        (154, 'Northern Europe'),
        (155, 'Western Europe'),
    )
    region = models.IntegerField('Region Code',choices=REGION_CODES)
    subregion = models.IntegerField('Sub-Region Code',choices=SUBREGION_CODES)
    lon = models.FloatField('Longitude',help_text="Longitude of centerpoint")
    lat = models.FloatField('Latitude',help_text="Latitude of centerpoint")
    zoom_level = models.CharField(max_length=2,null=True)
    slug = models.SlugField(null=True)
    visited = models.BooleanField(default=False)
    lux_region = models.ForeignKey(Region, null=True)
    pub_date = models.DateTimeField('Date published',null=True)
    # GeoDjango-specific: a geometry field (MultiPolygonField), and
    # overriding the default manager with a GeoManager instance.
    geometry = models.MultiPolygonField('Country Border',srid=4326)
    objects = models.GeoManager()

  
    # Returns the string representation of the model.        
    def __unicode__(self):
        return self.name
  
    class Meta:
        ordering = ['name']
        verbose_name_plural = 'Countries'
        
    def get_absolute_url(self):
        return "/locations/%s/" % (self.slug)

    
class State(models.Model):
    name = models.CharField(max_length=250, blank=True, null=True,)
    country = models.ForeignKey(Country)
    slug = models.SlugField()
    pub_date = models.DateTimeField('Date published',null=True)
    geometry = models.MultiPolygonField(srid=4326,null=True)
    objects = models.GeoManager()
    
    class Meta:
        ordering = ['name']
    
    class Admin:
        pass
        
    def __unicode__(self):
        return "%s" %(self.name)

    def get_absolute_url(self):
        return "/locations/%s/%s/" % (self.country.slug, self.slug)

class Location(models.Model):
    state = models.ForeignKey(State)
    name = models.CharField(max_length=50, )
    slug = models.SlugField()
    pub_date = models.DateTimeField('Date published',null=True)
    # GeoDjango specific Polygon Field and GeoManager
    geometry = models.MultiPolygonField(srid=4326)
    # GeoManager, a subclass that adds a rich set of geospatial queryset methods
    objects = models.GeoManager()
        
    def get_absolute_url(self):
        return "/locations/%s/%s/%s/" % (self.state.country.slug, self.state.slug, self.slug)

        
    def __unicode__(self): return self.name

class WritingbyLocationSitemap(Sitemap):
    changefreq = "weekly"
    priority = 0.6
    
    def location():
        return '/writing/%s/1/' %(self.slug)
    
    def items(self):
        return Location.objects.all()