from apiflask import APIBlueprint
from flask import abort
from sqlalchemy import and_, or_

from ...base.mode import EnrollmentsMode
from ...base.schemas import MessageSchema
from ...dependencies import db
from ...examination_schedule.models import (
    ExaminationSchedule,
    TemporaryAvailability,
    TermOfDefence,
)
from ..models import ProjectSupervisor
from ..schemas import (
    ListOfFreeTimesSchema,
    ListOfTermOfDefenceSchema,
    TemporaryProjectSupervisorSchema,
    TimeAvailabilityCreateSchema,
)

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


@bp.post("/<int:examination_schedule_id>/enrollments/")
@bp.input(TimeAvailabilityCreateSchema)
@bp.output(MessageSchema)
def set_your_free_time_to_examination_schedule(
    examination_schedule_id: int, data: dict
) -> dict:
    # this code will be removed
    project_supervisor = ProjectSupervisor.query.filter(
        ProjectSupervisor.id == data["project_supervisor_id"]
    ).first()
    if project_supervisor is None:
        abort(404, "ProjectSupervisor doesn't exist!")
    print(project_supervisor)
    ################

    examination_schedule = ExaminationSchedule.query.filter(
        ExaminationSchedule.id == examination_schedule_id
    ).first()
    if examination_schedule is None:
        abort(404, "Examination schedule doesn't exist!")
    if examination_schedule.year_group_id != project_supervisor.year_group_id:
        abort(400, "You are not assigned to this year group!")

    if examination_schedule.open_enrollments != EnrollmentsMode.INIT.value:
        abort(400, "Enrollments has started or closed! You have been delayed!")

    sd = data.get("start_date")
    ed = data.get("end_date")
    if sd > ed:
        abort(400, "Invalid data! End date must be greater than start date!")

    start_date = examination_schedule.start_date
    end_date = examination_schedule.end_date
    if not (
        start_date.timestamp() <= sd.timestamp()
        and end_date.timestamp() >= ed.timestamp()
    ):
        abort(400, "Invalid date range!")

    ta = (
        TemporaryAvailability.query.filter(
            TemporaryAvailability.examination_schedule_id == examination_schedule_id
        )
        .filter(TemporaryAvailability.project_supervisor_id == project_supervisor.id)
        .filter(
            or_(
                and_(
                    TemporaryAvailability.start_date >= sd,
                    TemporaryAvailability.start_date < ed,
                    TemporaryAvailability.end_date >= ed,
                ),
                and_(
                    TemporaryAvailability.start_date <= sd,
                    TemporaryAvailability.end_date > sd,
                    TemporaryAvailability.end_date <= ed,
                ),
            )
        )
        .first()
    )
    if ta is not None:
        abort(
            400,
            "Invalid date ranges. You set your free time "
            "in this date range! Choose another date!",
        )

    ta = TemporaryAvailability(**data, examination_schedule_id=examination_schedule_id)
    db.session.add(ta)
    db.session.commit()

    return {"message": "You have just assigned your free time!"}


@bp.delete(
    "/<int:examination_schedule_id>/enrollments/<int:temporary_availability_id>/"
)
@bp.input(TemporaryProjectSupervisorSchema)
@bp.output(MessageSchema)
def delete_your_free_time_from_examination_schedule(
    examination_schedule_id: int, temporary_availability_id: int, data: dict
) -> dict:
    # this code will be removed
    project_supervisor = (
        db.session.query(ProjectSupervisor)
        .filter(ProjectSupervisor.id == data["id"])
        .first()
    )
    if project_supervisor is None:
        abort(404, "ProjectSupervisor doesn't exist!")
    ################
    examination_schedule = ExaminationSchedule.query.filter(
        ExaminationSchedule.id == examination_schedule_id
    ).first()
    if examination_schedule is None:
        abort(404, "Examination schedule doesn't exist!")

    if examination_schedule.open_enrollments != EnrollmentsMode.INIT.value:
        abort(400, "Enrollments has started or closed! You have been delayed!")

    ta = TemporaryAvailability.query.filter(
        TemporaryAvailability.examination_schedule_id == examination_schedule_id,
        TemporaryAvailability.project_supervisor_id == project_supervisor.id,
        TemporaryAvailability.id == temporary_availability_id,
    ).first()

    if ta is None:
        abort(404, "Your free time doesn't exist!")

    db.session.delete(ta)
    db.session.commit()
    return {"message": "You have just removed your free time!"}


@bp.get("/<int:examination_schedule_id>/temporary-availabilities/")
@bp.input(TemporaryProjectSupervisorSchema, location="query")
@bp.output(ListOfFreeTimesSchema)
def list_enrollments_for_project_supervisor(
    examination_schedule_id: int, data: dict
) -> dict:
    # this code will be removed
    project_supervisor = (
        db.session.query(ProjectSupervisor)
        .filter(ProjectSupervisor.id == data["id"])
        .first()
    )
    if project_supervisor is None:
        abort(404, "ProjectSupervisor doesn't exist!")
    ################
    examination_schedule = ExaminationSchedule.query.filter(
        ExaminationSchedule.id == examination_schedule_id
    ).first()
    if examination_schedule is None:
        abort(404, "Examination schedule doesn't exist!")

    if examination_schedule.open_enrollments != EnrollmentsMode.INIT.value:
        abort(400, "Enrollments has started or closed! You have been delayed!")

    # list of your term of defences first enrollment
    ta = TemporaryAvailability.query.filter(
        TemporaryAvailability.examination_schedule_id == examination_schedule_id,
        TemporaryAvailability.project_supervisor_id == project_supervisor.id,
    ).all()
    return {"free_times": ta}


@bp.get("/<int:examination_schedule_id>/term-of-defences/")
@bp.input(TemporaryProjectSupervisorSchema, location="query")
@bp.output(ListOfTermOfDefenceSchema)
def list_created_term_of_defences_by_coordinator_for_project_supervisor(
    examination_schedule_id: int, data: dict
) -> dict:
    # this code will be removed
    project_supervisor = (
        db.session.query(ProjectSupervisor)
        .filter(ProjectSupervisor.id == data["id"])
        .first()
    )
    if project_supervisor is None:
        abort(404, "ProjectSupervisor doesn't exist!")
    ################
    es = ExaminationSchedule.query.filter(
        ExaminationSchedule.id == examination_schedule_id,
        ExaminationSchedule.year_group_id,
    ).first()
    if es is None:
        abort(404, "Examination schedule doesn't exist!")

    # list of your free times first enrollment
    td = (
        TermOfDefence.query.join(TermOfDefence.members_of_committee)
        .filter(TermOfDefence.examination_schedule_id == examination_schedule_id)
        .filter_by(id=project_supervisor.id)
        .all()
    )
    return {"term_of_defences": td}