import json
import secrets
from urllib.parse import unquote

from flask import current_app, request

from app import redis_client
from app.enums import InvitedUserStatus
from app.notify_client import NotifyAdminAPIClient, _attach_current_user, cache
from app.utils.user_permissions import (
    all_ui_permissions,
    translate_permissions_from_ui_to_db,
)
from notifications_utils.url_safe_token import generate_token


class InviteApiClient(NotifyAdminAPIClient):
    def init_app(self, app):
        super().init_app(app)

        self.admin_url = app.config["ADMIN_BASE_URL"]

    def create_invite(
        self,
        invite_from_id,
        service_id,
        email_address,
        permissions,
        auth_type,
        folder_permissions,
    ):
        data = {
            "service": service_id,
            "email_address": email_address,
            "from_user": invite_from_id,
            "permissions": ",".join(
                sorted(translate_permissions_from_ui_to_db(permissions))
            ),
            "auth_type": auth_type,
            "invite_link_host": self.admin_url,
            "folder_permissions": folder_permissions,
        }
        data = _attach_current_user(data)

        ttl = 24 * 60 * 60

        # make and store the state
        state = generate_token(
            str(request.remote_addr),
            current_app.config["SECRET_KEY"],
            current_app.config["DANGEROUS_SALT"],
        )
        state_key = f"login-state-{unquote(state)}"
        redis_client.set(state_key, state, ex=ttl)

        # make and store the nonce
        nonce = secrets.token_urlsafe()
        nonce_key = f"login-nonce-{unquote(nonce)}"
        redis_client.set(nonce_key, nonce, ex=ttl)  # save the nonce to redis.

        data["nonce"] = nonce  # This is passed to api for the invite url.
        data["state"] = state  # This is passed to api for the invite url.

        resp = self.post(url=f"/service/{service_id}/invite", data=data)

        resp_data = resp["data"]
        invite_data_key = f"invitedata-{unquote(state)}"
        redis_invite_data = resp["invite"]
        redis_invite_data = json.dumps(redis_invite_data)
        redis_client.set(invite_data_key, redis_invite_data, ex=ttl)

        return resp_data

    def get_invites_for_service(self, service_id):
        return self.get(f"/service/{service_id}/invite")["data"]

    def get_invited_user(self, invited_user_id):
        return self.get(f"/invite/service/{invited_user_id}")["data"]

    def get_invited_user_for_service(self, service_id, invited_user_id):
        return self.get(f"/service/{service_id}/invite/{invited_user_id}")["data"]

    def get_count_of_invites_with_permission(self, service_id, permission):
        if permission not in all_ui_permissions:
            raise TypeError(f"{permission} is not a valid permission")
        return len(
            [
                invited_user
                for invited_user in self.get_invites_for_service(service_id)
                if invited_user.has_permission_for_service(service_id, permission)
            ]
        )

    def check_token(self, token):
        return self.get(url=f"/invite/service/check/{token}")["data"]

    def cancel_invited_user(self, service_id, invited_user_id):
        data = {"status": InvitedUserStatus.CANCELLED}
        data = _attach_current_user(data)
        self.post(url=f"/service/{service_id}/invite/{invited_user_id}", data=data)

    def resend_invite(self, service_id, invited_user_id):
        ttl = 24 * 60 * 60

        # make and store the state
        state = generate_token(
            str(request.remote_addr),
            current_app.config["SECRET_KEY"],
            current_app.config["DANGEROUS_SALT"],
        )
        state_key = f"login-state-{unquote(state)}"
        redis_client.set(state_key, state, ex=ttl)

        # make and store the nonce
        nonce = secrets.token_urlsafe()
        nonce_key = f"login-nonce-{unquote(nonce)}"
        redis_client.set(nonce_key, nonce, ex=ttl)

        data = {
            "nonce": nonce,
            "state": state,
        }
        resp = self.post(
            url=f"/service/{service_id}/invite/{invited_user_id}/resend", data=data
        )

        invite_data_key = f"invitedata-{unquote(state)}"
        redis_invite_data = resp["invite"]
        redis_invite_data = json.dumps(redis_invite_data)
        redis_client.set(invite_data_key, redis_invite_data, ex=ttl)

    @cache.delete("service-{service_id}")
    @cache.delete("user-{invited_user_id}")
    def accept_invite(self, service_id, invited_user_id):
        data = {"status": InvitedUserStatus.ACCEPTED}
        self.post(url=f"/service/{service_id}/invite/{invited_user_id}", data=data)


invite_api_client = InviteApiClient()