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


class GameEvent(models.Model):
    # Gate phase
    ROOM_CREATED = "room_created"
    SLOT_RESERVED = "slot_reserved"
    SLOT_FILLED = "slot_filled"
    SLOT_RETURNED = "slot_returned"
    SLOT_RELEASED = "slot_released"
    INVITE_SENT = "invite_sent"
    # Role Select phase
    ROLE_SELECT_STARTED = "role_select_started"
    ROLE_SELECTED = "role_selected"
    ROLES_REVEALED = "roles_revealed"

    VERB_CHOICES = [
        (ROOM_CREATED, "Room created"),
        (SLOT_RESERVED, "Gate slot reserved"),
        (SLOT_FILLED, "Gate slot filled"),
        (SLOT_RETURNED, "Gate slot returned"),
        (SLOT_RELEASED, "Gate slot released"),
        (INVITE_SENT, "Invite sent"),
        (ROLE_SELECT_STARTED, "Role select started"),
        (ROLE_SELECTED, "Role selected"),
        (ROLES_REVEALED, "Roles revealed"),
    ]

    room = models.ForeignKey(
        "epic.Room", on_delete=models.CASCADE, related_name="events",
    )
    actor = models.ForeignKey(
        settings.AUTH_USER_MODEL, null=True, blank=True,
        on_delete=models.SET_NULL, related_name="game_events",
    )
    verb = models.CharField(max_length=30, choices=VERB_CHOICES)
    data = models.JSONField(default=dict)
    timestamp = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ["timestamp"]

    def to_prose(self):
        """Return a human-readable action description (actor rendered separately in template)."""
        d = self.data
        if self.verb == self.SLOT_FILLED:
            _token_names = {
                "coin": "Coin-on-a-String", "Free": "Free Token",
                "tithe": "Tithe Token", "pass": "Backstage Pass", "carte": "Carte Blanche",
            }
            code = d.get("token_type", "token")
            token = d.get("token_display") or _token_names.get(code, code)
            days = d.get("renewal_days", 7)
            slot = d.get("slot_number", "?")
            return f"deposits a {token} for slot {slot} ({days} days)"
        if self.verb == self.SLOT_RESERVED:
            return "reserves a seat"
        if self.verb == self.SLOT_RETURNED:
            return "withdraws from the gate"
        if self.verb == self.SLOT_RELEASED:
            return f"releases slot {d.get('slot_number', '?')}"
        if self.verb == self.ROOM_CREATED:
            return "opens this room"
        if self.verb == self.INVITE_SENT:
            return "sends an invitation"
        if self.verb == self.ROLE_SELECT_STARTED:
            return "Role selection begins"
        if self.verb == self.ROLE_SELECTED:
            _role_names = {
                "PC": "Player", "BC": "Builder", "SC": "Shepherd",
                "AC": "Alchemist", "NC": "Narrator", "EC": "Economist",
            }
            code = d.get("role", "?")
            role = d.get("role_display") or _role_names.get(code, code)
            return f"elects to start as {role}"
        if self.verb == self.ROLES_REVEALED:
            return "All roles assigned"
        return self.verb

    def __str__(self):
        actor = self.actor.email if self.actor else "system"
        return f"[{self.timestamp:%Y-%m-%d %H:%M}] {actor} → {self.verb}"


def record(room, verb, actor=None, **data):
    """Record a game event in the drama log."""
    return GameEvent.objects.create(room=room, actor=actor, verb=verb, data=data)