from datetime import date, datetime
from django.shortcuts import render, get_object_or_404
from django.contrib.auth.decorators import login_required
from django.views.decorators.http import require_http_methods
from django.http import HttpResponse, HttpResponseRedirect, JsonResponse
from django.db.models import Min, Avg, Max, Sum
from django.urls import reverse
from django.conf import settings
from django.contrib.auth import get_user_model
from django.contrib.contenttypes.models import ContentType
from django.core.mail import send_mail

import pendulum

from jarvis.core.models import Email
from jarvis.people.models import Gymnast
from jarvis.tools.date_week_transition import from_date_to_week_number
from jarvis.tools.models import Season
from .models import (
    Chrono,
    ChronoDetails,
)

from .forms import ChronoForm

from .models import (
    SCORE_TYPE_CHOICE,
    CHRONO_TYPE_CHOICE,
)

from .email_vars import MAIL_HEADER, MAIL_FOOTER

User = get_user_model()


@login_required
@require_http_methods(["GET"])
def jump_chrono_details(request, chrono_id):
    """Récupère toutes les informations détaillées d'un chrono. La fonction en profite pour
    recalculer le total et s'assure que cela correspond à la valeur stockée dans le model
    Chrono.

    Args:
        chrono_id   (int)   identifiant chrono

    QTF : Est-ce que je ne devrais pas faire un prefetch_related sur mon objet chrono pour
    optimiser mon affichage ?
        chrono = Chrono.object.get(pk=chrono_id).prefetch_related('chrono_details') ?
    """

    chrono = get_object_or_404(Chrono, pk=chrono_id)

    if not request.user.is_superuser and (
        request.session.has_key("available_gymnast")
        and chrono.gymnast.id not in request.session["available_gymnast"]
    ):
        return chrono_listing(request)

    sum_value = chrono.details.all().aggregate(total=Sum("value"))

    if chrono.score != sum_value["total"]:
        chrono.score = sum_value["total"]
        if chrono.score_type == 0:
            chrono.tof = Chrono.compute_tof(sum_value["total"])
        chrono.save()

    mean_value = chrono.details.all().aggregate(mean=Avg("value"))["mean"]
    tmp_min_value = chrono.details.all().aggregate(min=Min("value"))["min"]
    tmp_max_value = chrono.details.all().aggregate(max=Max("value"))["max"]
    chart_min_value = mean_value - (tmp_min_value / 20)
    chart_max_value = mean_value - (tmp_max_value / 20)

    context = {
        "chrono": chrono,
        "mean_value": mean_value,
        "chart_min_value": chart_min_value,
        "chart_max_value": chart_max_value,
    }
    return render(request, "chronos/details.html", context)


@login_required
@require_http_methods(["GET"])
def average_jump_chrono_details_for_gymnast(
    request, gymnast_id, routine_type=1, season=None, week_number=1
):
    """Récupère tout les chronos entre deux date pour un gymnaste et un type de série

    Args:
        gymnast_id      (int)       Identifiant d'un gymnaste
        routine_type    (int)       Type de série (cf. jarvis/followup/models.py > ROUTINE_CHOICE)
        season          (string)    Saison sous forme "xxxx-xxxy"
        week_number     (int)       numéro de semaine (1, …, 52)
    """
    if season is None:
        today = pendulum.now().date()
        season, week_number = from_date_to_week_number(today)
    else:
        season = Season(season).label
        week_number = min(week_number, 52)
        week_number = max(week_number, 1)

    return average_jump_chrono_details_for_season_and_week(
        request,
        gymnast_id,
        routine_type,
        season,
        week_number,
    )


@require_http_methods(["POST"])
def remove_jump_chrono_value(request):
    """
    Recoit trois informations permettant de supprimer le chrono d'un saut à un chrono.
    """
    chrono_id = request.POST.get("chrono_id", None)
    order = request.POST.get("order", None)
    chrono = get_object_or_404(Chrono, pk=chrono_id)
    try:
        ChronoDetails.objects.filter(chrono=chrono, order=order).delete()
    except Exception:
        return HttpResponse(409)

    return HttpResponse(200)


@require_http_methods(["POST"])
def add_jump_chrono_value(request):
    """
    Receives three pieces of information to add the time of a jump to a <Chrono> record.
    """
    chrono_id = request.POST.get("chrono_id")
    order = request.POST.get("order")
    value = request.POST.get("value")

    # Validate required parameters
    if not chrono_id or not order or value is None:
        return HttpResponse(400, "Missing required parameters.")

    # Retrieve the Chrono object or return 404 if not found
    chrono = get_object_or_404(Chrono, pk=chrono_id)

    # Attempt to create a new ChronoDetails record
    row, created = ChronoDetails.objects.get_or_create(
        # chrono=chrono, order=order, defaults={'value': value}
        chrono=chrono, order=order, value=value
    )

    # Check if the record was created or just retrieved
    if created:
        return HttpResponse(201, f"New chrono detail added: {row}")  # 201 Created
    else:
        # If the record was not created, it means it already exists with the same order and chrono
        return HttpResponse(409, f"Chrono detail already exists: {row}")  # 409 Conflict


@login_required
@require_http_methods(["GET"])
def jump_chrono_values_create_or_update(request, chrono_id):
    """
    Ajoute des scores de saut à un chrono.

    Args:
        chrono_id   (int)   identifiant chrono
    """

    chrono = get_object_or_404(Chrono, pk=chrono_id)
    jump_list = chrono.details.all()
    number_of_jump = jump_list.count()
    context = {
        "chrono": chrono,
        "jump_list": jump_list,
        "number_of_jump": number_of_jump,
        "score_type": chrono.score_type,
    }
    return render(request, "chronos/add_details.html", context)


@login_required
@require_http_methods(["GET"])
def average_jump_chrono_details_between_two_date(
    request, gymnast_id, routine_type=1, date_begin=None, date_end=None
):
    """Récupère tout les chronos entre deux date pour un gymnaste et un type de série

    Args:
        gymnast_id      (int)   Identifiant d'un gymnaste
        routine_type    (int)   type de série (cf. jarvis/followup/models.py > ROUTINE_CHOICE)
        date_begin      (date)  date de début
        date_end        (date)  date de fin

    QTF : le cast en date devrait être dans un try mais comment gérer correctement l'erreur - si
    erreur il y a ?
    """

    if date_end:
        try:
            date_end = datetime.strptime(date_end, "%Y-%m-%d").date()
        except (ValueError, TypeError):
            date_end = pendulum.now().date()
    else:
        date_end = pendulum.now().date()

    if date_begin:
        try:
            date_begin = datetime.strptime(date_begin, "%Y-%m-%d").date()
        except (ValueError, TypeError):
            date_begin = datetime(date_end.year, 9, 1)
    else:
        date_begin = datetime(date_end.year, 9, 1)

    gymnast = get_object_or_404(Gymnast, pk=gymnast_id)

    stat_values = (
        ChronoDetails.objects.filter(
            chrono__gymnast=gymnast_id,
            chrono__chrono_type=routine_type,
            chrono__date__gte=date_begin,
            chrono__date__lte=date_end,
        )
        .values("order")
        .annotate(
            avg_score=Avg("value"), max_score=Max("value"), min_score=Min("value")
        )
        .order_by("order")
    )

    chrono_list = Chrono.objects.filter(
        gymnast=gymnast_id,
        date__gte=date_begin,
        date__lte=date_end,
        chrono_type=routine_type,
    )

    context = {
        "gymnast": gymnast,
        "date_begin": date_begin,
        "date_end": date_end,
        "chrono_list": chrono_list,
        "stat_values": stat_values,
    }
    return render(request, "chronos/list_details.html", context)


@require_http_methods(["GET"])
def get_chrono_detail_distinct_season(request, gymnast_id):
    """Récupère toutes les saisons pour lesquelles le gymnaste a des chronos détaillés.

    Args:
        gymnast_id      (int)       Identifiant d'un gymnaste
    """
    gymnast = get_object_or_404(Gymnast, pk=gymnast_id)
    season_list = list(
        gymnast.chronos.values_list("season", flat=True)
        .distinct("season")
        .order_by("season")
    )
    return JsonResponse(season_list, safe=False)


@require_http_methods(["GET"])
def get_chrono_detail_distinct_weeknumber_for_season(request, gymnast_id, season):
    """Récupère toutes les week_number pour lesquelles le gymnaste a des chronos détaillés au cours
    d'une saison.

    Args:
        gymnast_id      (int)       Identifiant d'un gymnaste
        season          (string)    Season
    """
    gymnast = get_object_or_404(Gymnast, pk=gymnast_id)
    weeknumber_list = list(
        gymnast.chronos.values_list("week_number", flat=True)
        .filter(season=season)
        .distinct("week_number")
        .order_by("week_number")
    )
    return JsonResponse(weeknumber_list, safe=False)


@require_http_methods(["GET"])
def get_average_jump_chrono_details_for_season_and_week(
    request, gymnast_id, routine_type, season, week_number
):
    """Récupère tout les chronos moyen par saut pour une saison & semaine d'un gymnaste

    Args:
        gymnast_id      (int)       Identifiant d'un gymnaste
        routine_type    (int)       Type de série (cf. jarvis/followup/models.py > ROUTINE_CHOICE)
        season          (string)    Season
        week_number     (int)       Numero de la semaine
    """

    stat_values = list(
        ChronoDetails.objects.filter(
            chrono__gymnast=gymnast_id,
            chrono__chrono_type=routine_type,
            chrono__season=season,
            chrono__week_number=week_number,
        )
        .values("order")
        .annotate(avg_score=Avg("value"))
        .order_by("order")
    )
    return JsonResponse(stat_values, safe=False)


@login_required
@require_http_methods(["GET"])
def average_jump_chrono_details_for_season_and_week(
    request, gymnast_id, routine_type, season, week_number
):
    """Récupère tout les chronos entre deux date pour un gymnaste et un type de série

    Args:
        gymnast_id      (int)       Identifiant d'un gymnaste
        routine_type    (int)       Type de série (cf. jarvis/followup/models.py > ROUTINE_CHOICE)
        season          (string)    Season
        week_number     (int)       Numero de la semaine
    """

    gymnast = get_object_or_404(Gymnast, pk=gymnast_id)

    stat_values = (
        ChronoDetails.objects.filter(
            chrono__gymnast=gymnast_id,
            chrono__chrono_type=routine_type,
            chrono__season=season,
            chrono__week_number=week_number,
        )
        .values("order")
        .annotate(
            avg_score=Avg("value"), max_score=Max("value"), min_score=Min("value")
        )
        .order_by("order")
    )
    # print(stat_values)

    distinct_season_list = (
        gymnast.chronos.values_list("season", flat=True)
        .distinct("season")
        .order_by("season")
    )
    distinct_week_number_list = (
        gymnast.chronos.values_list("week_number", flat=True)
        .filter(season=season)
        .distinct("week_number")
        .order_by("week_number")
    )
    distinct_routine_type_list = (
        gymnast.chronos.values_list("chrono_type", flat=True)
        .distinct("chrono_type")
        .order_by("chrono_type")
    )

    chrono_list = Chrono.objects.filter(
        gymnast=gymnast_id,
        season=season,
        week_number=week_number,
        chrono_type=routine_type,
    )
    # print(chrono_list)

    context = {
        "gymnast": gymnast,
        "selected_season": season,
        "selected_week_number": week_number,
        "selected_routine_type": routine_type,
        "chrono_list": chrono_list,
        "stat_values": stat_values,
        "distinct_season_list": distinct_season_list,
        "distinct_week_number_list": distinct_week_number_list,
        "distinct_routine_type_list": distinct_routine_type_list,
    }
    return render(request, "chronos/list_details.html", context)


@login_required
@require_http_methods(["GET"])
def chrono_listing(request, gymnast_id=None):
    """
    Récupère les chronos des gymnastes autorisé(e)s.

    Args:
        gymnast_id  (int)   identifiant d'un gymnaste
    """

    gymnast = None
    if gymnast_id and (
        request.user.is_superuser
        or request.user.gymnast.id == gymnast_id
        or (
            request.session.has_key("available_gymnast")
            and gymnast_id in request.session["available_gymnast"]
        )
    ):
        gymnast = Gymnast.objects.get(pk=gymnast_id)
        chrono_list = Chrono.objects.filter(gymnast=gymnast_id).order_by("date")
        base_queryset = chrono_list.values("date").annotate(score_avg=Avg("tof"))

        context = {
            "chrono_10c": base_queryset.filter(chrono_type=0),
            "chrono_r1": base_queryset.filter(chrono_type=1),
            "chrono_r2": base_queryset.filter(chrono_type=2),
            "chrono_rf": base_queryset.filter(chrono_type=3),
        }

        personnal_best_10 = Chrono.objects.filter(gymnast=gymnast_id, chrono_type=0).order_by("-tof").first()
        personnal_best_q1r1 = Chrono.objects.filter(gymnast=gymnast_id, chrono_type=1).order_by("-tof").first()
        personnal_best_q1r2 = Chrono.objects.filter(gymnast=gymnast_id, chrono_type=2).order_by("-tof").first()
        context["personnal_best_10"] = personnal_best_10
        context["personnal_best_q1r1"] = personnal_best_q1r1
        context["personnal_best_q1r2"] = personnal_best_q1r2

    else:
        context = {}
        if request.user.is_superuser:
            chrono_list = Chrono.objects.all()
        else:
            chrono_list = Chrono.objects.filter(
                gymnast__in=request.session["available_gymnast"]
            )

    context["chrono_list"] = chrono_list
    context["gymnast"] = gymnast
    return render(request, "chronos/list.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def chrono_create_or_update(request, chrono_id=None, gymnast_id=None):
    """Création ou modification d'un chrono

    Args:
        chrono_id   (int)   identifiant d'un chrono
        gymnast_id  (int)   identifiant d'un gymnaste
    """

    if chrono_id:
        chrono = get_object_or_404(Chrono, pk=chrono_id)
        if not request.user.is_superuser and (
            request.session.has_key("available_gymnast")
            and chrono.gymnast.id not in request.session["available_gymnast"]
        ):
            return chrono_listing(request)

        data = {
            "gymnast": chrono.gymnast.id,
            "gymnast_related": str(chrono.gymnast),
        }
    else:
        chrono = None
        data = None
        if gymnast_id is not None:
            gymnast = get_object_or_404(Gymnast, pk=gymnast_id)
            data = {"gymnast": gymnast_id, "gymnast_related": gymnast}

    if request.method == "POST":
        form = ChronoForm(request.POST, instance=chrono)

        if form.is_valid():
            new_chrono = form.save(commit=False)

            if new_chrono.score_type == 1:
                new_chrono.tof = new_chrono.score
            else:
                new_chrono.tof = Chrono.compute_tof(new_chrono.score)

            new_chrono.save()

            # notification
            receivers = []
            functionality = ContentType.objects.get(model="chrono")
            for notification in new_chrono.gymnast.notifications.filter(
                functionality=functionality
            ):
                receivers.append(notification.user.email)

            title = f"{new_chrono.gymnast} : Nouveau chrono"
            body = f"""<p>Bonjour,</p><p>Nouveau chrono pour {new_chrono.gymnast} : {SCORE_TYPE_CHOICE[new_chrono.score_type][1]} {CHRONO_TYPE_CHOICE[new_chrono.chrono_type][1]} - {new_chrono.score}.</p>"""

            Email.objects.create(
                receivers=receivers,
                title=title,
                body=body,
            )

            send_mail(
                title,
                f"{new_chrono.gymnast} a enregistrer un nouveau chrono ({date})",
                settings.EMAIL_HOST_USER,
                receivers,
                fail_silently=False,
                html_message=body + MAIL_FOOTER,
            )

            return HttpResponseRedirect(
                reverse("chrono_list_for_gymnast", args=(new_chrono.gymnast.id,))
            )

        return render(request, "chronos/create.html", {"form": form})

    form = ChronoForm(instance=chrono, initial=data)
    context = {"form": form, "chrono_id": chrono_id}
    return render(request, "chronos/create.html", context)