import uuid

from datetime import timedelta
from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver
from django.conf import settings
from django.utils import timezone

from apps.lyric.models import Token


class Room(models.Model):
    GATHERING = "GATHERING"
    OPEN = "OPEN"
    RENEWAL_DUE = "RENEWAL_DUE"
    GATE_STATUS_CHOICES = [
        (GATHERING, "Gathering"),
        (OPEN, "Open"),
        (RENEWAL_DUE, "Renewal Due"),
    ]

    PRIVATE = "PRIVATE"
    PUBLIC = "PUBLIC"
    INVITE_ONLY = "INVITE ONLY"
    VISIBILITY_CHOICES = [
        (PRIVATE, "Private"),
        (PUBLIC, "Public"),
        (INVITE_ONLY, "Invite Only"),
    ]

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=200)
    owner = models.ForeignKey(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="owned_rooms"
    )
    visibility = models.CharField(max_length=20, choices=VISIBILITY_CHOICES, default=PRIVATE)
    gate_status = models.CharField(max_length=20, choices=GATE_STATUS_CHOICES, default=GATHERING)
    renewal_period = models.DurationField(null=True, blank=True, default=timedelta(days=7))
    created_at = models.DateTimeField(auto_now_add=True)
    board_state = models.JSONField(default=dict)
    seed_count = models.IntegerField(default=12)

class GateSlot(models.Model):
    EMPTY = "EMPTY"
    RESERVED = "RESERVED"
    FILLED = "FILLED"
    STATUS_CHOICES = [
        (EMPTY, "Empty"),
        (RESERVED, "Reserved"),
        (FILLED, "Filled"),
    ]

    room = models.ForeignKey(Room, on_delete=models.CASCADE, related_name="gate_slots")
    slot_number = models.IntegerField()
    gamer = models.ForeignKey(
        settings.AUTH_USER_MODEL, null=True, blank=True,
        on_delete=models.SET_NULL, related_name="gate_slots"
    )
    funded_by = models.ForeignKey(
        settings.AUTH_USER_MODEL, null=True, blank=True,
        on_delete=models.SET_NULL, related_name="funded_slots"
    )
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, default=EMPTY)
    reserved_at = models.DateTimeField(null=True, blank=True)
    filled_at = models.DateTimeField(null=True, blank=True)


@receiver(post_save, sender=Room)
def create_gate_slots(sender, instance, created, **kwargs):
    if created:
        for i in range(1, 7):
            GateSlot.objects.create(room=instance, slot_number=i)


def debit_token(user, slot, token):
    if token.token_type == Token.COIN:
        token.current_room = slot.room
        token.next_ready_at = timezone.now() + slot.room.renewal_period
        token.save()
    else:
        token.delete()
    slot.gamer = user
    slot.status = GateSlot.FILLED
    slot.filled_at = timezone.now()
    slot.save()