from flask import request
from flask_login import current_user
from flask_restful import Resource, marshal_with, reqparse
from werkzeug.exceptions import Forbidden

from controllers.console import api
from controllers.console.setup import setup_required
from controllers.console.wraps import account_initialization_required
from fields.tag_fields import tag_fields
from libs.login import login_required
from models.model import Tag
from services.tag_service import TagService


def _validate_name(name):
    if not name or len(name) < 1 or len(name) > 40:
        raise ValueError('Name must be between 1 to 50 characters.')
    return name


class TagListApi(Resource):

    @setup_required
    @login_required
    @account_initialization_required
    @marshal_with(tag_fields)
    def get(self):
        tag_type = request.args.get('type', type=str)
        keyword = request.args.get('keyword', default=None, type=str)
        tags = TagService.get_tags(tag_type, current_user.current_tenant_id, keyword)

        return tags, 200

    @setup_required
    @login_required
    @account_initialization_required
    def post(self):
        # The role of the current user in the ta table must be admin or owner
        if not current_user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument('name', nullable=False, required=True,
                            help='Name must be between 1 to 50 characters.',
                            type=_validate_name)
        parser.add_argument('type', type=str, location='json',
                            choices=Tag.TAG_TYPE_LIST,
                            nullable=True,
                            help='Invalid tag type.')
        args = parser.parse_args()
        tag = TagService.save_tags(args)

        response = {
            'id': tag.id,
            'name': tag.name,
            'type': tag.type,
            'binding_count': 0
        }

        return response, 200


class TagUpdateDeleteApi(Resource):

    @setup_required
    @login_required
    @account_initialization_required
    def patch(self, tag_id):
        tag_id = str(tag_id)
        # The role of the current user in the ta table must be admin or owner
        if not current_user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument('name', nullable=False, required=True,
                            help='Name must be between 1 to 50 characters.',
                            type=_validate_name)
        args = parser.parse_args()
        tag = TagService.update_tags(args, tag_id)

        binding_count = TagService.get_tag_binding_count(tag_id)

        response = {
            'id': tag.id,
            'name': tag.name,
            'type': tag.type,
            'binding_count': binding_count
        }

        return response, 200

    @setup_required
    @login_required
    @account_initialization_required
    def delete(self, tag_id):
        tag_id = str(tag_id)
        # The role of the current user in the ta table must be admin or owner
        if not current_user.is_admin_or_owner:
            raise Forbidden()

        TagService.delete_tag(tag_id)

        return 200


class TagBindingCreateApi(Resource):

    @setup_required
    @login_required
    @account_initialization_required
    def post(self):
        # The role of the current user in the ta table must be admin or owner
        if not current_user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument('tag_ids', type=list, nullable=False, required=True, location='json',
                            help='Tag IDs is required.')
        parser.add_argument('target_id', type=str, nullable=False, required=True, location='json',
                            help='Target ID is required.')
        parser.add_argument('type', type=str, location='json',
                            choices=Tag.TAG_TYPE_LIST,
                            nullable=True,
                            help='Invalid tag type.')
        args = parser.parse_args()
        TagService.save_tag_binding(args)

        return 200


class TagBindingDeleteApi(Resource):

    @setup_required
    @login_required
    @account_initialization_required
    def post(self):
        # The role of the current user in the ta table must be admin or owner
        if not current_user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument('tag_id', type=str, nullable=False, required=True,
                            help='Tag ID is required.')
        parser.add_argument('target_id', type=str, nullable=False, required=True,
                            help='Target ID is required.')
        parser.add_argument('type', type=str, location='json',
                            choices=Tag.TAG_TYPE_LIST,
                            nullable=True,
                            help='Invalid tag type.')
        args = parser.parse_args()
        TagService.delete_tag_binding(args)

        return 200


api.add_resource(TagListApi, '/tags')
api.add_resource(TagUpdateDeleteApi, '/tags/<uuid:tag_id>')
api.add_resource(TagBindingCreateApi, '/tag-bindings/create')
api.add_resource(TagBindingDeleteApi, '/tag-bindings/remove')