# -*- coding: utf-8 -*-
from datetime import datetime

from flask import (
    Response,
    jsonify,
    render_template,
    request,
    stream_with_context,
    url_for,
)

from app import (
    current_service,
    format_date_numeric,
    job_api_client,
    notification_api_client,
)
from app.main import main
from app.notify_client.api_key_api_client import KEY_TYPE_TEST
from app.utils import (
    DELIVERED_STATUSES,
    FAILURE_STATUSES,
    get_help_argument,
    parse_filter_args,
    set_status_filters,
)
from app.utils.csv import generate_notifications_csv
from app.utils.templates import get_template
from app.utils.user import user_has_permissions


@main.route("/services/<uuid:service_id>/notification/<uuid:notification_id>")
@user_has_permissions('view_activity', 'send_messages')
def view_notification(service_id, notification_id):
    notification = notification_api_client.get_notification(service_id, str(notification_id))
    notification['template'].update({'reply_to_text': notification['reply_to_text']})

    personalisation = get_all_personalisation_from_notification(notification)
    error_message = None

    template = get_template(
        notification['template'],
        current_service,
        show_recipient=True,
        redact_missing_personalisation=True,
        sms_sender=notification['reply_to_text'],
        email_reply_to=notification['reply_to_text'],
    )
    template.values = personalisation
    if notification['job']:
        job = job_api_client.get_job(service_id, notification['job']['id'])['data']
    else:
        job = None

    if get_help_argument() or request.args.get('help') == '0':
        # help=0 is set when you’ve just sent a notification. We
        # only want to show the back link when you’ve navigated to a
        # notification, not when you’ve just sent it.
        back_link = None
    elif request.args.get('from_job'):
        back_link = url_for(
            'main.view_job',
            service_id=current_service.id,
            job_id=request.args.get('from_job'),
        )
    else:
        back_link = url_for(
            'main.view_notifications',
            service_id=current_service.id,
            message_type=template.template_type,
            status='sending,delivered,failed',
        )

    return render_template(
        'views/notifications/notification.html',
        finished=(notification['status'] in (DELIVERED_STATUSES + FAILURE_STATUSES)),
        notification_status=notification['status'],
        message=error_message,
        uploaded_file_name='Report',
        template=template,
        job=job,
        updates_url=url_for(
            ".view_notification_updates",
            service_id=service_id,
            notification_id=notification['id'],
            status=request.args.get('status'),
            help=get_help_argument()
        ),
        partials=get_single_notification_partials(notification),
        created_by=notification.get('created_by'),
        created_at=notification['created_at'],
        updated_at=notification['updated_at'],
        help=get_help_argument(),
        notification_id=notification['id'],
        can_receive_inbound=(current_service.has_permission('inbound_sms')),
        sent_with_test_key=(
            notification.get('key_type') == KEY_TYPE_TEST
        ),
        back_link=back_link,
    )


@main.route("/services/<uuid:service_id>/notification/<uuid:notification_id>.json")
@user_has_permissions('view_activity', 'send_messages')
def view_notification_updates(service_id, notification_id):
    return jsonify(**get_single_notification_partials(
        notification_api_client.get_notification(service_id, notification_id)
    ))


def get_single_notification_partials(notification):
    return {
        'status': render_template(
            'partials/notifications/status.html',
            notification=notification,
            sent_with_test_key=(
                notification.get('key_type') == KEY_TYPE_TEST
            ),
        ),
    }


def get_all_personalisation_from_notification(notification):

    if notification['template'].get('redact_personalisation'):
        notification['personalisation'] = {}

    if notification['template']['template_type'] == 'email':
        notification['personalisation']['email_address'] = notification['to']

    if notification['template']['template_type'] == 'sms':
        notification['personalisation']['phone_number'] = notification['to']

    return notification['personalisation']


@main.route("/services/<uuid:service_id>/download-notifications.csv")
@user_has_permissions('view_activity')
def download_notifications_csv(service_id):
    filter_args = parse_filter_args(request.args)
    filter_args['status'] = set_status_filters(filter_args)

    service_data_retention_days = current_service.get_days_of_retention(filter_args.get('message_type')[0])
    return Response(
        stream_with_context(
            generate_notifications_csv(
                service_id=service_id,
                job_id=None,
                status=filter_args.get('status'),
                page=request.args.get('page', 1),
                page_size=10000,
                format_for_csv=True,
                template_type=filter_args.get('message_type'),
                limit_days=service_data_retention_days,
            )
        ),
        mimetype='text/csv',
        headers={
            'Content-Disposition': 'inline; filename="{} - {} - {} report.csv"'.format(
                format_date_numeric(datetime.now().strftime("%Y-%m-%dT%H:%M:%S.%fZ")),
                filter_args['message_type'][0],
                current_service.name)
        }
    )