from django.conf import settings
from django.http import HttpResponseRedirect
from django import forms
from django.shortcuts import render
import requests


def _get_token():
    url = 'https://products.api.telstra.com/v2/oauth/token'

    headers = {
        'Content-Type': 'application/x-www-form-urlencoded'
    }
    data = {
        'client_id': settings.TELSTRA_AUTH['client_id'],
        'client_secret': settings.TELSTRA_AUTH['client_secret'],
        'grant_type': 'client_credentials'
    }

    result = requests.post(url, data=data, headers=headers)
    if result.status_code != 200:
        print("Bad request for telstra access_token:" + str(result.status_code))
        return None
    return result.json()['access_token']


def telstra_api_request(url, data=None, method="POST"):
    url = 'https://products.api.telstra.com/' + url

    token = _get_token()
    headers = {
        'Telstra-api-version': '3.x',
        'Content-Language': 'en-au',
        'Authorization': f'Bearer {token}',
        'Accept': 'application/json',
        'Accept-Charset': 'utf-8',
        'Content-Type': 'application/json'
    }
    result = requests.request(method, url, json=data, headers=headers)

    if result.status_code != 200:
        print("Bad request:" + str(result.status_code))
        print(result.content)
        return False, result.content
    return True, result.json()


def _send_message(to, msg):
    url = 'messaging/v3/messages'
    data = {
        'to': to,
        'from': _get_virtual_numbers(),
        'messageContent': msg
    }
    result = telstra_api_request(url, data)
    return result


def _get_virtual_numbers():
    url = 'messaging/v3/virtual-numbers'
    success, result = telstra_api_request(url, method='GET')
    if not success:
        print("No number found")
        success, result = telstra_api_request(url, method='POST')
        if not success:
            return None
        return result['virtualNumber']

    numbers = result['virtualNumbers']
    if numbers is None:
        return None
    return numbers[0]['virtualNumber']


class SMSForm(forms.Form):
    _selected_action = forms.CharField(widget=forms.MultipleHiddenInput)
    send_to_parents = forms.BooleanField(required=False)
    send_to_emergency_contacts = forms.BooleanField(required=False)
    only_include_active_travellers = forms.BooleanField(initial=True, required=False)
    message = forms.CharField(label="Message", max_length=160, widget=forms.Textarea)


def _get_numbers(request, queryset):
    send_to_parents = bool(request.POST.get("send_to_parents"))
    send_to_emergency_contacts = bool(request.POST.get("send_to_emergency_contacts"))
    only_include_active_travellers = bool(request.POST.get("only_include_active_travellers"))

    numbers = []
    for traveller in queryset:
        if only_include_active_travellers and not traveller._is_active():
            continue
        for family in traveller.get_families():
            family_numbers, _ = family.get_parsed_numbers(parents=send_to_parents, emergency=send_to_emergency_contacts)
            if family_numbers:
                numbers = numbers + family_numbers
    return list(set(numbers))  # Remove duplicates


def _family_context(queryset):
    family_set = []
    for traveller in queryset:
        families = traveller.get_families()
        if len(families) == 0:
            family_set.append({
                'traveller': traveller.__str__(),
                'has_failed_number': True
            })
        for family in families:
            _, failed_numbers = family.get_parsed_numbers(True, True)
            family_context = {
                'traveller': traveller.__str__(),
                'has_failed_number': len(failed_numbers) > 0
            }
            if family.parent_A_phone:
                family_context['parent_A'] = f"{family.parent_A_firstname} {family.parent_A_lastname} ({family.parent_A_phone})"
            if family.parent_B_phone:
                family_context['parent_B'] = f"{family.parent_B_firstname} {family.parent_B_lastname} ({family.parent_B_phone})"
            if family.emergency_contact_A_phone:
                family_context['contact_A'] = f"{family.emergency_contact_A_firstname} {family.emergency_contact_A_lastname} ({family.emergency_contact_A_phone})"
            if family.emergency_contact_B_phone:
                family_context['contact_B'] = f"{family.emergency_contact_B_firstname} {family.emergency_contact_B_lastname} ({family.emergency_contact_B_phone})"
            family_set.append(family_context)
    return family_set


def send_sms(send_sms_mixin, request, queryset):
    if not settings.TELSTRA_AUTH:
        send_sms_mixin.message_user(request, "Telstra auth not configured", level="WARNING")
        return HttpResponseRedirect(request.get_full_path())

    if 'send' in request.POST:
        numbers = _get_numbers(request, queryset)
        if len(numbers) > 500:
            send_sms_mixin.message_user(request, f"SMS failed. Total phone numbers ({len(numbers)}) exceeds 500", level="WARNING")
            return HttpResponseRedirect(request.get_full_path())
        if len(numbers) == 0:
            send_sms_mixin.message_user(request, f"SMS failed. No numbers we selected", level="WARNING")
            return HttpResponseRedirect(request.get_full_path())
        result = _send_message(numbers, request.POST["message"])
        send_sms_mixin.message_user(request, f"SMS has been sent to {len(numbers)} recipients")
        return HttpResponseRedirect(request.get_full_path())

    form = SMSForm(initial={'_selected_action': queryset.values_list('id', flat=True)})

    family_set = _family_context(queryset)

    return render(request, 'admin/sms_form.html', context={'form': form, 'items': family_set})


class SMSTestForm(forms.Form):
    phone_number = forms.CharField(label="Phone number", max_length=20)
    message = forms.CharField(label="Message", max_length=160, widget=forms.Textarea)


def send_sms_test(request):

    if not settings.TELSTRA_AUTH:
        return None

    if request.method == "POST":
        _send_message(request.POST["phone_number"], request.POST["message"])
    return None