# Script de migration des données de la base "absences" -> "assiduites"/"justificatifs"

from app import db

from app.models import (
    Assiduite,
    Justificatif,
    Absence,
    Identite,
    ModuleImpl,
    Departement,
)
from app.scodoc.sco_utils import EtatAssiduite, EtatJustificatif, localize_datetime
from datetime import time, datetime, date


class glob:
    DUPLICATIONS_ASSIDUITES: dict[tuple[date, bool, int], Assiduite] = {}
    DUPLICATED: list[Justificatif] = []


def migrate_abs_to_assiduites(
    dept: str = "", morning: str = None, noon: str = None, evening: str = None
):
    """
    une absence à 3 états:

    |.estabs|.estjust|
    |1|0| -> absence non justifiée
    |1|1| -> absence justifiée
    |0|1| -> justifié

    dualité des temps :

    .matin: bool (0:00 -> time_pref | time_pref->23:59:59)
    .jour : date (jour de l'absence/justificatif)
    .moduleimpl_id: relation -> moduleimpl_id
    description:str -> motif abs / raision justif

    .entry_date: datetime -> timestamp d'entrée de l'abs
    .etudid: relation -> Identite
    """
    if morning == "":
        pref_time_morning = time(8, 0)
    else:
        morning: list[str] = morning.split("h")
        pref_time_morning = time(int(morning[0]), int(morning[1]))

    if noon == "":
        pref_time_noon = time(12, 0)
    else:
        noon: list[str] = noon.split("h")
        pref_time_noon = time(int(noon[0]), int(noon[1]))

    if evening == "":
        pref_time_evening = time(18, 0)
    else:
        evening: list[str] = evening.split("h")
        pref_time_evening = time(int(evening[0]), int(evening[1]))

    absences_query = Absence.query
    if dept != "":
        depts_id = [dep.id for dep in Departement.query.filter_by(acronym=dept).all()]
        absences_query = absences_query.filter(Absence.etudid.in_(depts_id))
    absences: list[Absence] = absences_query.order_by(Absence.jour).all()

    glob.DUPLICATED = []
    glob.DUPLICATIONS_ASSIDUITES = {}

    for abs in absences:
        print(f"\n== {abs.jour}:{abs.etudid}:{abs.matin} ==")
        if abs.estabs:
            generated = _from_abs_to_assiduite(
                abs, pref_time_morning, pref_time_noon, pref_time_evening
            )
            if not isinstance(generated, str):
                db.session.add(generated)
                print(
                    f"{abs.jour}:absence:{abs.etudid}:{abs.matin} -> {generated.date_debut}:{generated.date_fin}"
                )
        if abs.estjust:
            generated = _from_abs_to_justificatif(
                abs, pref_time_morning, pref_time_noon, pref_time_evening
            )
            if not isinstance(generated, str):
                db.session.add(generated)
                print(
                    f"{abs.jour}:justif:{abs.etudid}:{abs.matin} -> {generated.date_debut}:{generated.date_fin}"
                )

    dup_assi = glob.DUPLICATED
    assi: Assiduite
    for assi in dup_assi:
        assi.moduleimpl_id = None
        db.session.add(assi)

    db.session.commit()


def _from_abs_to_assiduite(
    _abs: Absence, morning: time, noon: time, evening: time
) -> Assiduite:
    etat = EtatAssiduite.ABSENT
    date_deb: datetime = None
    date_fin: datetime = None
    if _abs.matin:
        date_deb = datetime.combine(_abs.jour, morning)
        date_fin = datetime.combine(_abs.jour, noon)
    else:
        date_deb = datetime.combine(_abs.jour, noon)
        date_fin = datetime.combine(_abs.jour, evening)

    date_deb = localize_datetime(date_deb)
    date_fin = localize_datetime(date_fin)
    duplicata: Assiduite = glob.DUPLICATIONS_ASSIDUITES.get(
        (_abs.jour, _abs.matin, _abs.etudid)
    )
    if duplicata is not None:
        glob.DUPLICATED.append(duplicata)
        return "Duplicated"

    desc: str = _abs.description
    entry_date: datetime = _abs.entry_date

    etud: Identite = Identite.query.filter_by(id=_abs.etudid).first()
    moduleimpl: ModuleImpl = ModuleImpl.query.filter_by(id=_abs.moduleimpl_id).first()

    retour = Assiduite.create_assiduite(
        etud=etud,
        date_debut=date_deb,
        date_fin=date_fin,
        etat=etat,
        moduleimpl=moduleimpl,
        description=desc,
        entry_date=entry_date,
    )

    glob.DUPLICATIONS_ASSIDUITES[(_abs.jour, _abs.matin, _abs.etudid)] = retour

    return retour


def _from_abs_to_justificatif(
    _abs: Absence, morning: time, noon: time, evening: time
) -> Justificatif:
    etat = EtatJustificatif.VALIDE
    date_deb: datetime = None
    date_fin: datetime = None
    if _abs.matin:
        date_deb = datetime.combine(_abs.jour, morning)
        date_fin = datetime.combine(_abs.jour, noon)
    else:
        date_deb = datetime.combine(_abs.jour, noon)
        date_fin = datetime.combine(_abs.jour, evening)

    date_deb = localize_datetime(date_deb)
    date_fin = localize_datetime(date_fin)

    desc: str = _abs.description
    entry_date: datetime = _abs.entry_date

    etud: Identite = Identite.query.filter_by(id=_abs.etudid).first()

    retour = Justificatif.create_justificatif(
        etud=etud,
        date_debut=date_deb,
        date_fin=date_fin,
        etat=etat,
        raison=desc,
        entry_date=entry_date,
    )

    return retour