import copy
from django.contrib import admin
from django.contrib.gis.admin import OSMGeoAdmin
from .models import APClass, AP, Sighting, FieldNote

from photos.forms import GalleryForm
from utils.util import get_latlon
from utils.widgets import CustomSelectMultiple, LGEntryForm
from django.contrib.admin.options import FORMFIELD_FOR_DBFIELD_DEFAULTS

class GalleryFormPlus(GalleryForm):
    def __init__(self, *args, **kwargs):
        super(GalleryFormPlus, self).__init__(*args, **kwargs)
        self.base_fields['seen_by'].widget = CustomSelectMultiple()
    
    class Meta:
        model = Sighting
        fields = '__all__' 


@admin.register(APClass)
class APClassAdmin(admin.ModelAdmin):
    list_display = ('common_name', 'scientific_name', 'kind')
    list_filter = ('kind',)


class SightingInline(OSMGeoAdmin, admin.StackedInline):
    """
    This is very fragile and probably a bad idea since I copied this
    code straight from Django and it may change, but unless GeoDjango 
    adds a Mixin, this will have to do.
    """
    model = Sighting
    extra = 1
    lat, lon = get_latlon()
    default_lon = lon
    default_lat = lat
    default_zoom = 13
    units = True
    scrollable = False
    map_width = 700
    map_height = 425
    map_template = 'gis/admin/osm.html'
    openlayers_url = '/static/admin/js/OpenLayers.js'

    def __init__(self, parent_model, admin_site):
        self.admin_site = admin_site
        self.parent_model = parent_model
        self.opts = self.model._meta
        self.has_registered_model = admin_site.is_registered(self.model)
        overrides = copy.deepcopy(FORMFIELD_FOR_DBFIELD_DEFAULTS)
        for k, v in self.formfield_overrides.items():
            overrides.setdefault(k, {}).update(v)
        self.formfield_overrides = overrides
        if self.verbose_name is None:
            self.verbose_name = self.model._meta.verbose_name
        if self.verbose_name_plural is None:
            self.verbose_name_plural = self.model._meta.verbose_name_plural


@admin.register(AP)
class APAdmin(admin.ModelAdmin):
    form = LGEntryForm
    inlines = [
        SightingInline,
    ]
    list_display = ('common_name', 'have_seen', 'scientific_name', 'kind', 'code', 'apclass')
    list_filter = ('apclass__kind', 'apclass')
    search_fields = ['common_name', 'scientific_name']

    def have_seen(self, obj):
        return obj.seen
    have_seen.admin_order_field = 'seen'
    have_seen.boolean = True

    class Media:
        js = ('image-loader.js', 'next-prev-links.js')


@admin.register(Sighting)
class SightingAdmin(OSMGeoAdmin):
    list_filter = (('location', admin.RelatedOnlyFieldListFilter),)
    list_display = ('ap', 'location')
    # options for OSM map Using custom ESRI topo map
    lat, lon = get_latlon()
    default_lon = lon
    default_lat = lat
    default_zoom = 13
    units = True
    scrollable = False
    map_width = 700
    map_height = 425
    map_template = 'gis/admin/osm.html'
    openlayers_url = '/static/admin/js/OpenLayers.js'

    class Media:
        js = ('next-prev-links.js',)


@admin.register(FieldNote)
class FieldNoteAdmin(admin.ModelAdmin):
    form = LGEntryForm

    def get_form(self, request, obj=None, **kwargs):
        form = super(FieldNoteAdmin, self).get_form(request, obj, **kwargs)
        form.base_fields['sighting'].label_from_instance = lambda obj: "{} - {} - {}".format(obj.ap_common_name, obj.pub_date.strftime("%Y-%b-%d"), obj.location_name)
        return form

    list_display = ('pk', 'ap_common_name', 'sighting_pub_date', 'sighting_location')
    fieldsets = (
        ('', {
            'fields': (
                'sighting',
                'body_markdown',
            ),
            'classes': (
                'show',
                'extrapretty',
                'wide'
            )
        }
        ),
    )

    class Media:
        js = ('image-loader.js', 'next-prev-links.js')
        css = {
            "all": ("my_styles.css",)
        }