from flask import abort
from apiflask import APIBlueprint
from flask_sqlalchemy import get_debug_queries

from ...project_supervisor.models import ProjectSupervisor
from ...students.models import Group
from ..schemas import ProjectSupervisorSchema, ProjectSupervisorEditSchema, ProjectSupervisorsPaginationSchema, \
    ProjectSupervisorCreateSchema, MessageSchema, ProjectSupervisorQuerySchema
from ...dependencies import db
from ...base.utils import paginate_models

bp = APIBlueprint("project_supervisor", __name__, url_prefix="/project_supervisor")


@bp.route("/", methods=["GET"])
@bp.input(ProjectSupervisorQuerySchema, location='query')
@bp.output(ProjectSupervisorsPaginationSchema)
def list_project_supervisors(query: dict) -> dict:
    fullname = query.get('fullname')
    order_by_first_name = query.get('order_by_first_name')
    order_by_last_name = query.get('order_by_last_name')
    mode = query.get('mode')
    page = query.get('page')
    per_page = query.get('per_page')

    project_supervisor_query = ProjectSupervisor.search_by_fullname_and_mode_and_order_by_first_name_or_last_name(
        fullname, mode, order_by_first_name, order_by_last_name)

    data = paginate_models(page, project_supervisor_query, per_page)
    # print(get_debug_queries()[0])
    return {
        "project_supervisors": data['items'],
        "max_pages": data['max_pages']
    }


@bp.route("/", methods=["POST"])
@bp.input(ProjectSupervisorCreateSchema)
@bp.output(MessageSchema)
def create_project_supervisor(data: dict) -> dict:
    first_name = data['first_name']
    last_name = data['last_name']
    project_supervisor = ProjectSupervisor.query.filter_by(first_name=first_name).filter_by(last_name=last_name).first()
    if project_supervisor is not None:
        abort(400, "Project Supervisor has already exists!")
    
    project_supervisor = ProjectSupervisor(**data)

    db.session.add(project_supervisor)
    db.session.commit()

    return {"message": "Project Supervisor was created!"}


@bp.route("/<int:id>/", methods=["GET"])
@bp.output(ProjectSupervisorSchema)
def detail_project_supervisor(id: int) -> ProjectSupervisor:
    project_supervisor = ProjectSupervisor.query.filter_by(id=id).first()
    if project_supervisor is None:
        abort(400, f"Project Supervisor with id {id} doesn't exist!")
    return project_supervisor


@bp.route("/<int:id>/", methods=["DELETE"])
@bp.output(MessageSchema, status_code=202)
def delete_project_supervisor(id: int) -> dict:
    project_supervisor = ProjectSupervisor.query.filter_by(id=id).first()
    if project_supervisor is None:
        abort(400, f"Project Supervisor with id {id} doesn't exist!")

    count_groups = db.session.query(db.func.count(ProjectSupervisor.id)).join(Group).\
        filter(ProjectSupervisor.id == id).group_by(ProjectSupervisor.id).scalar()
    if count_groups > 0:
        abort(400, f"Project Supervisor with id {id} has gropus!")

    db.session.delete(project_supervisor)
    db.session.commit()
    return {"message": "Project Supervisor was deleted!"}


@bp.route("/<int:id>", methods=["PUT"])
@bp.input(ProjectSupervisorEditSchema)
@bp.output(MessageSchema)
def edit_project_supervisor(id: int, data: dict) -> dict:
    if not data:
        abort(400, 'You have passed empty data!')
    
    project_supervisor_query = ProjectSupervisor.query.filter_by(id=id)
    project_supervisor = project_supervisor_query.first()

    if project_supervisor is None:
        abort(400, f"Project Supervisor with id {id} doesn't exist!")
    
    project_supervisor_query.update(data)
    db.session.commit()
    return {"message": "Project Supervisor was updated!"}