##############################################################################
#
# ScoDoc
#
# Copyright (c) 1999 - 2023 Emmanuel Viennet.  All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#   Emmanuel Viennet      emmanuel.viennet@viennet.net
#
##############################################################################

"""
Vues sur les formations BUT

Emmanuel Viennet, 2023
"""

from flask import g, render_template

from app import log
from app.decorators import (
    scodoc,
    permission_required,
)

from app.models import (
    ApcCompetence,
    ApcNiveau,
    ApcParcours,
    ApcReferentielCompetences,
    Formation,
)
from app.scodoc.sco_permissions import Permission
from app.scodoc.sco_exceptions import ScoValueError
from app.views import notes_bp as bp
from app.views import ScoData


@bp.route("/parcour_formation/<int:parcour_id>/<int:formation_id>")
@scodoc
@permission_required(Permission.ScoView)
def parcour_formation(parcour_id: int, formation_id: int) -> str:
    """visu HTML d'un parcours dans une formation,
    avec les compétences, niveaux et UEs associées."""
    formation: Formation = Formation.query.filter_by(
        id=formation_id, dept_id=g.scodoc_dept_id
    ).first_or_404()
    ref_comp: ApcReferentielCompetences = formation.referentiel_competence
    if ref_comp is None:
        return "pas de référentiel de compétences"
    parcour: ApcParcours = ref_comp.parcours.filter_by(id=parcour_id).first()
    if parcour is None:
        raise ScoValueError("parcours invalide ou hors référentiel de formation")

    competences_parcour = parcour_formation_competences(parcour, formation)

    return render_template(
        "but/parcour_formation.j2",
        formation=formation,
        parcour=parcour,
        competences_parcour=competences_parcour,
        sco=ScoData(),
    )


def parcour_formation_competences(parcour: ApcParcours, formation: Formation) -> list:
    """
    [
        {
            'competence' : ApcCompetence,
            'niveaux' : {
                1 : { ... },
                2 : { ... },
                3 : {
                    'niveau' : ApcNiveau,
                    'ue_impair' : UniteEns,
                    'ue_pair' : UniteEns
                }
            }
        }
    ]
    """

    def _niveau_ues(competence: ApcCompetence, annee: int) -> dict:
        niveaux = ApcNiveau.niveaux_annee_de_parcours(
            parcour, annee, competence=competence
        )
        if len(niveaux) > 0:
            if len(niveaux) > 1:
                log(f"_niveau_ues: plus d'un niveau pour {competence} annee {annee}")
            niveau = niveaux[0]
        elif len(niveaux) == 0:
            return {"niveau": None, "ue_pair": None, "ue_impair": None}

        ues = [
            ue
            for ue in niveau.ues
            if ue.formation.id == formation.id
            and parcour.id in (p.id for p in ue.parcours)
        ]
        ues_pair = [ue for ue in ues if ue.semestre_idx == 2 * annee]
        if len(ues_pair) > 0:
            ue_pair = ues_pair[0]
            if len(ues_pair) > 1:
                log(
                    f"_niveau_ues: {len(ues)} associées au niveau {niveau} / S{2*annee}"
                )
        else:
            ue_pair = None
        ues_impair = [ue for ue in ues if ue.semestre_idx == (2 * annee - 1)]
        if len(ues_impair) > 0:
            ue_impair = ues_impair[0]
            if len(ues_impair) > 1:
                log(
                    f"_niveau_ues: {len(ues)} associées au niveau {niveau} / S{2*annee-1}"
                )
        else:
            ue_impair = None
        return {
            "niveau": niveau,
            "ue_pair": ue_pair,
            "ue_impair": ue_impair,
        }

    competences = [
        {
            "competence": competence,
            "niveaux": {annee: _niveau_ues(competence, annee) for annee in (1, 2, 3)},
        }
        for competence in parcour.query_competences()
    ]
    return competences