import csv

from django.forms import widgets
from django.contrib import admin
from django.http import HttpResponse
from django.urls import reverse
from django.utils.html import format_html
from django.utils.http import urlencode
from import_export.admin import ImportExportModelAdmin

from .adminClone import CloneModelAdmin
from .context_helpers import bus_roll_context
from .email_helpers import email_companies_bus_roll, render_to_pdf
from .models import *
from .views import bus_roll


class ExportCsvMixin:
    def export_as_csv(self, request, queryset):
        meta = self.model._meta
        field_names = [field.name for field in meta.fields]

        response = HttpResponse(content_type='text/csv')
        response['Content-Disposition'] = 'attachment; filename={}.csv'.format(meta)
        writer = csv.writer(response)

        writer.writerow(field_names)
        for obj in queryset:
            row = writer.writerow([getattr(obj, field) for field in field_names])

        return response

    export_as_csv.short_description = "Export Selected"


class BusRollMixin:

    def show_bus_roll(self, request, queryset):
        return render_to_pdf('reports/bus_roll.html', bus_roll_context(queryset))

    def email_company(self, request, queryset):
        return email_companies_bus_roll(request, queryset)

    email_company.short_description = "Email Bus Roll to Company"


class HiddenNowTime(widgets.TimeInput):
    pass


class MyImportExportModelAdmin(ImportExportModelAdmin):
    def has_import_permission(self, request):
        return request.user.is_superuser


@admin.register(Company)
class CompanyAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_display = ["name", "buses"]

    def buses(self, obj):
        count = obj.bus_set.count()
        url = (
                reverse("admin:coord_bus_changelist")
                + "?"
                + urlencode({"company__id__exact": f"{obj.id}"})
        )
        return format_html('<a href="{}">{} Buses</a>', url, count)


class DriverInline(admin.StackedInline):
    model = Driver
    extra = 0


class BusStopInline(admin.TabularInline):
    model = BusStop
    extra = 0
    ordering = ("am_time",)


@admin.register(Bus)
class BusesAdmin(MyImportExportModelAdmin, admin.ModelAdmin, BusRollMixin):
    list_filter = ["company"]
    list_display = ["route_name", "company", "contract_number", "route_travellers"]
    readonly_fields = ["traveller_count"]
    actions = ["email_company", "show_bus_roll"]
    inlines = [DriverInline, BusStopInline]
    fieldsets = [
        (None, {'fields': [
            "company", "route_name", "contract_number", "registration",
            "traveller_count", "seating_capacity", "make", "model", "notes"
        ]})
    ]

    def route_travellers(self, obj):
        url = (
                reverse("admin:coord_traveller_changelist")
                + "?"
                + urlencode({"bus_stops__bus__id__exact": f"{obj.id}"})
        )
        return format_html('<a href="{}">{} Travellers</a>', url, obj.traveller_count())


@admin.register(BusStop)
class BusStopAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_filter = ["bus__company", "bus__route_name"]
    list_display = ["__str__", "am_time", "pm_time", "address"]
    search_fields = ["bus__route_name", "address"]

    # change_form_template = 'admin/change_form_busStops.html'

    def export_as_csv(self, request, queryset):
        pass


@admin.register(Suburb)
class SuburbsAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_filter = ["state"]


class TravellerRouteInline(admin.TabularInline):
    model = TravellerRoute
    extra = 0


@admin.register(Traveller)
class TravellerAdmin(MyImportExportModelAdmin, CloneModelAdmin, admin.ModelAdmin):
    list_display = ["first_name", "last_name", "school", "year_level", "residential_address", "residential_suburb"]
    list_filter = ["school", "eligibility_status", "bus_stops__bus", "residential_suburb"]
    search_fields = ["first_name", "last_name", "residential_address"]
    cloneable_fields = ["last_name", "residential_address", "residential_suburb",
                        "postal_address", "postal_suburb", "eligibility_status", "shuttle",
                        "parent_A_firstname", "parent_A_lastname", "parent_A_phone", "parent_A_email",
                        "parent_B_firstname", "parent_B_lastname", "parent_B_phone", "parent_B_email",
                        "emergency_contact_A_firstname", "emergency_contact_A_lastname", "emergency_contact_A_phone",
                        "emergency_contact_A_relation", "emergency_contact_B_firstname", "emergency_contact_B_lastname",
                        "emergency_contact_B_phone", "emergency_contact_B_relation"]
    inlines = [TravellerRouteInline]
    readonly_fields = ["fare_paying"]
    fieldsets = [
        (None, {
            'fields': [
                "school",
                "first_name",
                "last_name",
                "dob",
                "year_level",
            ]
        }),
        ('Address', {
            'classes': ('collapse',),
            'fields': [
                "residential_address",
                "residential_suburb",
                "postal_address",
                "postal_suburb",
            ]
        }),
        ('Office Use', {
            'classes': ('collapse',),
            'fields': [
                "distance_to_school",
                "travel_start_date",
                "travel_end_date",
                "eligibility_status",
                "fare_paying",
                "term_1_paid",
                "term_2_paid",
                "term_3_paid",
                "term_4_paid",
                "assessment_date",
                "application_form_completed",
                "parent_notified",
                "seat_number",
            ]
        }),
        ('Adult Contacts', {
            'classes': ('collapse',),
            'fields': [
                "parent_A_firstname",
                "parent_A_lastname",
                "parent_A_phone",
                "parent_A_email",
                "parent_B_firstname",
                "parent_B_lastname",
                "parent_B_phone",
                "parent_B_email",
                "emergency_contact_A_firstname",
                "emergency_contact_A_lastname",
                "emergency_contact_A_phone",
                "emergency_contact_A_relation",
                "emergency_contact_B_firstname",
                "emergency_contact_B_lastname",
                "emergency_contact_B_phone",
                "emergency_contact_B_relation"
            ]
        }),
        (None, {'fields': ["notes", "shuttle"]})
    ]
    # list_display_links = None

    actions = ["yearly_rollover"]

    def yearly_rollover(self, request, queryset):
        pass


@admin.register(TravellerRoute)
class TravellerRouteAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_display = ["traveller", "busStop"]


@admin.register(School)
class SchoolAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    pass


@admin.register(Setting)
class SettingAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_display = ["name", "value"]


@admin.register(Shuttle)
class ShuttleAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_display = ["__str__", "school", "bus", "shuttle_travellers"]

    def shuttle_travellers(self, obj):
        url = (
                reverse("admin:coord_traveller_changelist")
                + "?"
                + urlencode({"shuttle__id__exact": f"{obj.id}"})
        )
        return format_html('<a href="{}">{} Travellers</a>', url, obj.traveller_count())


@admin.register(Driver)
class DriverAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    pass