from flask import g

from auth.auth_view import RegisteredAuthorizedView
from utils.exceptions import ValidationError
from constants.http_status import HTTP_201_CREATED

from campaigns.schemas import (
    campaign_response_schema,
    campaign_list_query_params,
    campaign_create_schema,
    campaign_actions_reqest_schema,
    campaign_details_response_schema
)
from campaigns.services.campaigns_service import CampaignsService
from flask_apispec import marshal_with, use_kwargs, doc


@doc(tags=['CampaignList'])
class CampaignListView(RegisteredAuthorizedView):
    """Endpoint for getting list of campaigns and creating new campaigns."""

    service = CampaignsService()

    @doc(description='Retrieve list of project campaigns')
    @use_kwargs(campaign_list_query_params, location='query')
    @marshal_with(campaign_response_schema, code=200, description='JSON with campaign list.')
    @marshal_with(None, code=401, description='User is not authenticated.')
    @marshal_with(None, code=403, description='User does not have access to the project.')
    @marshal_with(None, code=404, description='Project is not found.')
    def get(self, params, project_id):
        """Retrieve list of project campaigns.

        Args:
            params: CampaignListQueryParams
            project_id (int): Project ID.

        Returns:
            HTTP 200: JSON with campaign list.

        Raises:
            HTTP 401: If user is not authenticated.
            HTTP 403: If user does not have access to the project.
            HTTP 404: If project is not found.

        """

        self.permissions.can_access_project(project_id)

        if params.earliestStartDate and params.latestEndDate and params.earliestStartDate > params.latestEndDate:
            raise ValidationError("End date must be greater than or equal to start date.")

        return self.service.get_campaigns_by_project(project_id, params)

    @doc(description='Create new campaign for a given project')
    @use_kwargs(campaign_create_schema)
    @marshal_with(campaign_details_response_schema, code=201, description='JSON with ID of the new campaign.')
    @marshal_with(None, code=401, description='User is not authenticated.')
    @marshal_with(None, code=403, description='User does not have access to the project.')
    @marshal_with(None, code=404, description='Project is not found.')
    def post(self, params, project_id):
        """Create new campaign for a given project.

        Args:
            params: CampaignCreateSchema
            project_id (int): Project ID.

        Returns:
            HTTP 201: JSON with ID of the new campaign.

        Raises:
            HTTP 401: If user is not authenticated.
            HTTP 403: If user does not have access to the project.
            HTTP 404: If project is not found.

        """

        return self.no_content()
        self.permissions.can_create_campaign(project_id)

        campaign = self.service.create_campaign(project_id, created_by=g.user_id, campaign_data=params)
        return campaign, HTTP_201_CREATED

    @doc(description='Delete campaign')
    @use_kwargs(campaign_actions_reqest_schema, location='query')
    @marshal_with(None, code=204, description='Campaign deleted successfully.')
    @marshal_with(None, code=401, description='User is not authenticated.')
    @marshal_with(None, code=403, description='User does not have access to the project.')
    @marshal_with(None, code=404, description='Project is not found.')
    def delete(self, params, project_id):

        self.permissions.can_delete_campaign(project_id)
        self.service.delete_campaign(params.campaignUuid, project_id, user_id=g.user_id)

        return self.no_content()