from django.conf import settings
from django.db import models
from django.utils import timezone

from events.models import Event
from events.scoping import EventScopedManager

DEFAULT_GRID_WIDTH = 64
DEFAULT_GRID_HEIGHT = 64
PLACE_COOLDOWN_SECONDS = 30

# 16-entry palette, classic r/place-style colors. The index into this list is
# what's sent over the wire (see wire.py) - frontend/src/palette.ts must
# mirror this list exactly, in the same order.
PALETTE = [
    "#FFFFFF",  # 0  white
    "#E4E4E4",  # 1  light grey
    "#888888",  # 2  grey
    "#222222",  # 3  black
    "#FFA7D1",  # 4  pink
    "#E50000",  # 5  red
    "#E59500",  # 6  orange
    "#A06A42",  # 7  brown
    "#E5D900",  # 8  yellow
    "#94E044",  # 9  light green
    "#02BE01",  # 10 green
    "#00D3DD",  # 11 cyan
    "#0083C7",  # 12 blue
    "#0000EA",  # 13 dark blue
    "#CF6EE4",  # 14 purple
    "#820080",  # 15 dark purple
]


class PlaceSettings(models.Model):
    """One row per event, same event-scoped-singleton pattern as
    clock.models.ClockTimer. width/height are the live grid dimensions - the
    canonical source of truth is here, not a fixed constant, so an admin can
    resize the board per event (see signals.py for how that propagates).

    Unlike pplace's original PlaceSettings, there's no is_enabled here - the
    games registry (EventGame.enabled) is the single on/off switch, checked
    before a client can reach this app at all.
    """

    event = models.OneToOneField(
        Event, on_delete=models.CASCADE, related_name="place_settings"
    )
    width = models.PositiveSmallIntegerField(default=DEFAULT_GRID_WIDTH)
    height = models.PositiveSmallIntegerField(default=DEFAULT_GRID_HEIGHT)
    # Past this, the game is over without taking it down: every placement
    # is rejected and the board is shown wiped (see tasks.py). Only visual -
    # the PixelPlacement history and the Redis canvas are kept as-is, so
    # admin stats/heatmaps still see the final board. Empty = no end.
    placement_ends_at = models.DateTimeField(null=True, blank=True)

    def __str__(self):
        return f"PlaceSettings({self.event}, size={self.width}x{self.height})"

    @property
    def placement_ended(self) -> bool:
        return (
            self.placement_ends_at is not None
            and self.placement_ends_at <= timezone.now()
        )

    @classmethod
    def current(cls, event: Event) -> "PlaceSettings":
        obj, _ = cls.objects.get_or_create(event=event)
        return obj


class PixelPlacement(models.Model):
    event = models.ForeignKey(
        Event, on_delete=models.CASCADE, related_name="pixel_placements"
    )
    player = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name="pixel_placements",
    )
    x = models.PositiveSmallIntegerField()
    y = models.PositiveSmallIntegerField()
    color_index = models.PositiveSmallIntegerField()
    placed_at = models.DateTimeField(auto_now_add=True)

    objects = models.Manager()
    for_event = EventScopedManager()

    class Meta:
        ordering = ["-placed_at"]

    def __str__(self):
        return f"{self.player} placed ({self.x}, {self.y})=#{self.color_index} ({self.event})"