from __future__ import annotations

import uuid
from enum import Enum

from sqlalchemy import String
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from core.db.base import Base, SoftDeleteMixin, TimestampMixin


class FriendshipStatus(str, Enum):
    PENDING = "pending"
    ACCEPTED = "accepted"
    BLOCKED = "blocked"
    DECLINED = "declined"
    CANCELED = "canceled"


class Friendship(TimestampMixin, SoftDeleteMixin, Base):
    __tablename__: str = "friendships"
    __table_args__ = {"extend_existing": True}

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    user_low_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        nullable=False,
    )
    user_high_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        nullable=False,
    )
    initiator_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    status: Mapped[FriendshipStatus] = mapped_column(
        String(20),
        nullable=False,
        default=FriendshipStatus.PENDING,
    )
    requested_at: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    accepted_at: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    blocked_by: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    updated_by: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )