import csv
from datetime import date

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 rangefilter.filters import DateRangeFilterBuilder

from .adminClone import CloneModelAdmin
from .context_helpers import *
from .email_helpers import email_companies_bus_roll, render_to_pdf, email_school_roll, \
    email_companies_emergency_contacts, email_school_shuttle_roll
from .forms import roll_date_selector
from .models import *
from .utils.send_sms import send_sms


class BusRollMixin:

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

    def show_bus_roll_on_date(self, request, queryset):
        return roll_date_selector(self, request, queryset)

    def show_emergency_contacts(self, request, queryset):
        return render_to_pdf('reports/emergency_contacts.html', emergency_contacts_context(queryset))

    def sms_traveller_contacts(self, request, queryset):
        travellers = None
        for bus in queryset:
            query = Traveller.objects.filter(bus_stops__bus=bus).filter(is_active=True).distinct()
            if travellers is None:
                travellers = query
            else:
                travellers.union(query)
        return send_sms(self, request, travellers)

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

    def email_emergency_contacts(self, request, queryset):
        return email_companies_emergency_contacts(request, queryset)

    email_bus_roll.short_description = "Email Bus Roll to Company"
    email_emergency_contacts.short_description = "Email Emergency Contacts to Company"


class ShuttleRollMixin:

    def show_shuttle_roll(self, request, queryset):
        if queryset is None:
            buses = None
        else:
            buses = []
            for shuttle in queryset:
                if shuttle.bus not in buses:
                    buses.append(shuttle.bus)
        return render_to_pdf('reports/bus_roll.html', bus_roll_context(buses, include_bus_stops=False))

    def email_shuttle_roll(self, request, queryset):
        return email_school_shuttle_roll(request, queryset)



class SchoolRollMixin:

    def email_travellers_to_school(self, request, queryset):
        return email_school_roll(request, queryset)

    def show_school_travellers(self, request, queryset):
        return render_to_pdf('reports/school_roll.html', school_roll_context(queryset))

    def show_school_travellers_on_date(self, request, queryset):
        return render_to_pdf('reports/school_roll.html', school_roll_context(queryset))

    def export_travellers_to_csv(self, request, queryset):
        traveller_list = []
        for school in queryset:
            for travellerRoute in TravellerRoute.objects.filter(traveller__school=school):
                if not travellerRoute.traveller._is_active():
                    continue
                traveller_list.append(traveller_route_context(travellerRoute))

        response = HttpResponse(content_type="text/csv")
        response["Content-Disposition"] = f"attachment; filename=traveller_list_{date.today()}.csv"

        writer = csv.DictWriter(response, fieldnames=traveller_list[0].keys())
        writer.writeheader()
        writer.writerows(traveller_list)

        return response


class TravellerRollMixin:

    def confirmation_letter(self, request, queryset):
        return render_to_pdf('mail/confirmation_letter.html', confirmation_letter_context(queryset))

    def send_sms(self, request, queryset):
        return send_sms(self, request, queryset)

    def export_to_csv(self, request, queryset):
        traveller_list = traveller_roll_context(queryset)
        response = HttpResponse(content_type="text/csv")
        response["Content-Disposition"] = f"attachment; filename=traveller_list_{date.today()}.csv"

        writer = csv.DictWriter(response, fieldnames=traveller_list[0].keys())
        writer.writeheader()
        writer.writerows(traveller_list)

        return response


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", "contact_name", "email", "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)

    def email(self, obj):
        return format_html('<a href="mailto:{}">{}</a>', obj.contact_email, obj.contact_email)


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", "seating_capacity", "route_travellers"]
    readonly_fields = ["traveller_count"]
    actions = ["show_bus_roll", "show_bus_roll_on_date", "show_emergency_contacts", "sms_traveller_contacts", "email_bus_roll", "email_emergency_contacts"]
    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"]


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


class FamilyInline(admin.StackedInline):
    model = Family
    classes = ['collapse']
    extra = 0
    clone_parent = "traveller"


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


@admin.register(Traveller)
class TravellerAdmin(MyImportExportModelAdmin, CloneModelAdmin, TravellerRollMixin):
    list_display = ["first_name", "last_name", "school", "year_level", "is_active", "address", "stop_route", "shuttle", "travel_start_date", "travel_end_date"]
    list_filter = [
        "is_active", "school", "year_level", "eligibility_status", "bus_stops__bus", "shuttle",
        ("travel_start_date", DateRangeFilterBuilder(
            title="Start date"
        )),
        ("travel_end_date", DateRangeFilterBuilder(
            title="End date"
        ))
    ]
    cloneable_fields = ["last_name"]
    search_fields = ["first_name", "last_name", "address"]
    inlines = [FamilyInline, TravellerRouteInline]
    readonly_fields = ["travel_start_date", "travel_end_date", "created_on", "last_edit", "is_active", "address"]
    actions = ["export_to_csv", "send_sms", "confirmation_letter", "letter_creator"]
    fieldsets = [
        (None, {
            'fields': [
                "is_active",
                "school",
                "first_name",
                "last_name",
                "year_level",
                "dob",
                "address",
            ]
        }),
        ('Office Use', {
            'classes': ('collapse',),
            'fields': [
                "distance_to_school",
                "travel_start_date",
                "travel_end_date",
                "eligibility_status",
                "term_1_paid",
                "term_2_paid",
                "term_3_paid",
                "term_4_paid",
                "assessment_date",
                "application_form_completed",
                "parent_notified",
                "seat_number",
                "created_on",
                "last_edit",
            ]
        }),
        (None, {'fields': ["notes", "shuttle"]})
    ]
    # list_display_links = None

    def stop_route(self, obj):
        stops = BusStop.objects.filter(traveller__id__exact=obj.id)
        if stops.count() == 0:
            return ""
        if stops.count() == 1:
            return stops.first()
        return "Multiple"

    # def save_model(self, request, obj, form, change):
        # if obj.is_archived and obj.travel_end_date is None:
        #    obj.is_archived = False
        # super().save_model(request, obj, form, change)


# @admin.register(Family)
class FamilyAdmin(MyImportExportModelAdmin, admin.ModelAdmin):
    list_display = ["traveller", "__str__",
                    "parent_A_firstname", "parent_A_lastname", "parent_A_phone",
                    "parent_B_firstname", "parent_B_lastname", "parent_B_phone",
                    "emergency_contact_A_firstname", "emergency_contact_A_lastname", "emergency_contact_A_phone",
                    "emergency_contact_B_firstname", "emergency_contact_B_lastname", "emergency_contact_B_phone"]


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


@admin.register(School)
class SchoolAdmin(MyImportExportModelAdmin, admin.ModelAdmin, SchoolRollMixin):
    list_display = ["__str__", "address", "suburb", "school_email", "phone"]
    actions = ["email_travellers_to_school", "show_school_travellers", "export_travellers_to_csv"]

    def school_email(self, obj):
        return format_html('<a href="mailto:{}">{}</a>', obj.email, obj.email)


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


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

    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):
    list_display = ["__str__", "route", "phone_number"]

    def route(self, obj):
        url = reverse("admin:coord_bus_change", args=(obj.bus.id,))
        return format_html('<a href="{}">{}</a>', url, obj.bus)