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

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

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


@bp.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')
    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(
        None, fullname, 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.get("/<int:year_group_id>/")
@bp.input(ProjectSupervisorQuerySchema, location='query')
@bp.output(ProjectSupervisorsPaginationSchema)
def list_project_supervisors_by_year_group(year_group_id: int, 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')
    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(
        year_group_id, fullname, 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.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.get("/<int:id>/detail")
@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.delete("/<int:id>/")
@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)

    if count_groups is not None:
        abort(400, "Project Supervisor has at least one group!")

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


@bp.put("/<int:id>/")
@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!"}


@bp.post("/<int:id>/year-group/<int:year_group_id>")
@bp.input(ProjectSupervisorYearGroupSchema)
@bp.output(MessageSchema)
def add_project_supervisor_to_year_group(id: int, year_group_id: int, data: dict) -> dict:
    if not data:
        abort(400, 'You have passed empty data!')

    limit_group = data.get('limit_group')

    project_supervisor = ProjectSupervisor.query.filter(ProjectSupervisor.id == id).first()
    if project_supervisor is None:
        abort(400, f"Project Supervisor with id {id} doesn't exist!")

    year_group = YearGroup.query.filter(YearGroup.id == year_group_id).first()
    if year_group is None:
        abort(400, "Year group doesn't exist!")

    ygps = YearGroupProjectSupervisors.query.filter(YearGroupProjectSupervisors.project_supervisor_id == id). \
        filter(YearGroupProjectSupervisors.year_group_id == year_group_id).first()
    if ygps is not None:
        abort(400, "Project supervisor is assigned to this year group!")

    ygps = YearGroupProjectSupervisors(year_group_id=year_group_id, project_supervisor_id=id,
                                       limit_group=limit_group)
    db.session.add(ygps)
    db.session.commit()
    return {"message": "Project Supervisor was added to year group!"}


@bp.delete("/<int:id>/year-group/<int:year_group_id>")
@bp.output(MessageSchema)
def delete_project_supervisor_to_year_group(id: int, year_group_id: int) -> dict:
    project_supervisor = ProjectSupervisor.query.filter(ProjectSupervisor.id == id). \
        filter(YearGroup.id == year_group_id).first()
    if project_supervisor is None:
        abort(400, "Project Supervisor doesn't exist!")

    ygps = YearGroupProjectSupervisors.query.filter(YearGroupProjectSupervisors.project_supervisor_id == id). \
        filter(YearGroupProjectSupervisors.year_group_id == year_group_id).first()
    db.session.delete(project_supervisor)
    db.session.delete(ygps)
    db.session.commit()
    return {"message": "Project Supervisor was removed from this year group!"}


@bp.put("/<int:id>/year-group/<int:year_group_id>")
@bp.input(ProjectSupervisorYearGroupSchema)
@bp.output(MessageSchema)
def update_limit_of_group_for_project_supervisor(id: int, year_group_id: int, data: dict) -> dict:
    project_supervisor = ProjectSupervisor.query.filter(ProjectSupervisor.id == id). \
        filter(YearGroup.id == year_group_id).first()
    if project_supervisor is None:
        abort(400, "Project Supervisor doesn't exist!")

    ygps = YearGroupProjectSupervisors.query.filter(YearGroupProjectSupervisors.project_supervisor_id == id). \
        filter(YearGroupProjectSupervisors.year_group_id == year_group_id)
    ygps.update(data)
    db.session.commit()
    return {"message": "Limit of group was changed!"}