from datetime import datetime, timedelta

from common.external.external_api import api
from core.conf import settings

class DialogService:
    @staticmethod
    def to_datetime_from_Dialogflow(time: dict):
        date_time = datetime(int(time["year"]), int(time["month"]), int(time["day"]))
        return date_time
    
    @staticmethod
    def process_dates_to_timestamp(from_time: datetime = None, to_time: datetime = None):
        if to_time is None and from_time is not None:
            to_time = from_time.replace(hour=23, minute=59, second=59)
        
        if from_time is None:
            today = datetime.today().date()
            from_time = datetime.combine(today, datetime.min.time())
            to_time = datetime.combine(today, datetime.max.time()) - timedelta(microseconds=1)

        return int(from_time.timestamp()) * 1000 , int(to_time.timestamp()) * 1000

    def get_param_from_dialogflow(self, body: any):
        session_info = body.get("sessionInfo", {})
        parameters = session_info.get("parameters", {}) if isinstance(session_info.get("parameters"), dict) else {}
        raw_date = parameters.get("date")
        if raw_date is not None:
            raw_date = self.to_datetime_from_Dialogflow(raw_date)
        raw_departure_city = parameters.get("departure_city")
        raw_destination_city = parameters.get("destination_city")
        raw_ticket_number = parameters.get("ticket_number")
        raw_time_of_day = parameters.get("time_of_day")
        return raw_departure_city, raw_destination_city, raw_ticket_number, raw_date, raw_time_of_day

    @staticmethod
    async def search_route_ids_from_province(departure_code: str, destination_code: str):
        response = await api.get(f'/metadata/office/routes?DestCode={destination_code}&OriginCode={departure_code}')
        route_ids = []
        if isinstance(response, list):
                route_ids = [route.get("routeId", -1) for route in response]
        return route_ids

    @staticmethod
    async def seats_trip(route_id: int, trip_id:int, departure_date: str, departure_time: str, kind: str):
        try:
            params = {
                "departureDate": departure_date,
                "departureTime": departure_time,
                "kind": kind,
            }
            response = await api.get(api_base=settings.API_BASE_URL_VATO, endpoint=f"/seats/{route_id}/{trip_id}" , params=params)
            seats = response["data"]
            return seats
        except Exception as e:
            print(e)
            raise Exception("Error fetching seats data")
    
    async def is_valid_select_seat(self, seat: str,route_id: int, trip_id:int, departure_date: str, departure_time: str, kind: str):
        if seat is None:
            return False
        seats = await self.seats_trip(route_id, trip_id, departure_date, departure_time, kind)
        for seat_data in seats:
            if seat_data['chair'] == seat and seat_data['bookStatus'] == 'available':
                return True
        return False

    @staticmethod
    async def search_trip(from_time: int, to_time: int, route_ids: list[int], ticket_count: int = 1):
        try:
            payload = {
                "from_time": from_time,
                "to_time": to_time,
                "route_ids": route_ids,
                "ticket_count": ticket_count,
                "sort_by": ["price", "departure_time"]
            }

            response = await api.post("/search/trips", payload=payload)
            data = response["data"]["items"]
            return data
        except Exception as e:
            print(e)
            raise Exception("Error fetching trip data")
    async def search_trip_by_id(self, trip_id: int, from_time: int, to_time: int, route_ids: list[int], ticket_count: int = 1):
        trip = await self.search_trip(from_time, to_time, route_ids, ticket_count)
        for item in trip:
            if trip_id == item["id"]:
                return item
        return None
    
    @staticmethod
    async def stops(route_id: int, way_id: int):
        try:
            params = {
                "wayId": way_id,
            }
            response = await api.get(api_base=settings.API_BASE_URL_VATO, endpoint=f"/stops/{route_id}", params=params)
            data = response["data"]
            return data
        except Exception as e:
            print(e)
            raise Exception("Error fetching stops data")


    async def pickup_list(self, route_id: int, way_id: int):
        try:
            data = await self.stops(route_id, way_id)
            if not data:
                return []
            
            pickup_list = []

            for pickup in data:
                if pickup["type"] == 0 or ( pickup["type"] == -1 and pickup["presentBeforeMinutes"] < 0 ):
                    pickup_list.append(pickup)
            return pickup_list
        
        except Exception as e:
            print(e)
            raise Exception("Error fetching pickup list data")
    
    async def is_valid_pickup(self, pickup: str, route_id: int, way_id: int):
        if pickup is None:
            return False
        pickup_list = await self.pickup_list(route_id, way_id)
        for pickup_data in pickup_list:
            if pickup_data['name'] == pickup:
                return True
        return False

    async def dropoff_list(self, route_id: int, way_id: int):
        try:
            data = await self.stops(route_id, way_id)
            if not data:
                return []
            
            dropoff_list = []

            for dropoff in data:
                if dropoff["type"] == 1 or ( dropoff["type"] == -1 and dropoff["presentBeforeMinutes"] >= 0 ):
                    dropoff_list.append(dropoff)
            return dropoff_list
        
        except Exception as e:
            print(e)
            raise Exception("Error fetching dropoff list data")
        
    async def is_valid_dropoff(self, dropoff: str, route_id: int, way_id: int):
        if dropoff is None:
            return False
        dropoff_list = await self.dropoff_list(route_id, way_id)
        for dropoff_data in dropoff_list:
            if dropoff_data['name'] == dropoff:
                return True
        return False


dialog_service: DialogService = DialogService()