import enum
import uuid
from datetime import datetime, timezone
from sqlalchemy import String, Integer, ForeignKey, DateTime, Enum, Boolean
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship

class Base(DeclarativeBase):
    pass

class TicketStatus(str, enum.Enum):
    AVAILABLE = "AVAILABLE"
    LOCKED = "LOCKED"
    PAID = "PAID"
    SCANNED = "SCANNED"
    REFUNDED = "REFUNDED"

class User(Base):
    __tablename__ = "users"
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String, unique=True, index=True)
    hashed_password: Mapped[str] = mapped_column(String)
    is_superuser: Mapped[bool] = mapped_column(Boolean, default=False)
    tickets: Mapped[list["Ticket"]] = relationship(back_populates="user")

class Tournament(Base):
    __tablename__ = "tournaments"
    id: Mapped[int] = mapped_column(primary_key=True)
    title: Mapped[str] = mapped_column(String)
    description: Mapped[str | None] = mapped_column(String, nullable=True)
    event_date: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    seats: Mapped[list["Seat"]] = relationship(back_populates="tournament")

class Seat(Base):
    __tablename__ = "seats"
    id: Mapped[int] = mapped_column(primary_key=True)
    tournament_id: Mapped[int] = mapped_column(ForeignKey("tournaments.id"), index=True)
    sector: Mapped[str] = mapped_column(String)
    row: Mapped[int] = mapped_column(Integer)
    number: Mapped[int] = mapped_column(Integer)
    price: Mapped[int] = mapped_column(Integer)
    
    tournament: Mapped["Tournament"] = relationship(back_populates="seats")
    ticket: Mapped["Ticket"] = relationship(back_populates="seat", uselist=False)

class Ticket(Base):
    __tablename__ = "tickets"
    id: Mapped[int] = mapped_column(primary_key=True)
    seat_id: Mapped[int] = mapped_column(ForeignKey("seats.id"), unique=True, index=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=True, index=True)
    
    status: Mapped[TicketStatus] = mapped_column(
        Enum(TicketStatus, name="ticket_status_enum", create_type=False),
        default=TicketStatus.AVAILABLE,
        index=True
    )
    idempotency_key: Mapped[str] = mapped_column(String, unique=True, nullable=True)
    pdf_url: Mapped[str | None] = mapped_column(String, nullable=True)
    secret_token: Mapped[str | None] = mapped_column(
        String, unique=True, index=True, nullable=True,
        default=lambda: str(uuid.uuid4()),
    )
    
    # --- Поля для эквайринга ---
    payment_id: Mapped[str | None] = mapped_column(String, index=True, nullable=True)
    payment_url: Mapped[str | None] = mapped_column(String, nullable=True)
    expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    # ---------------------------

    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), 
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc)
    )

    seat: Mapped["Seat"] = relationship(back_populates="ticket")
    user: Mapped["User"] = relationship(back_populates="tickets")


class ActionLog(Base):
    """Audit trail: every mutating request is recorded here by AuditLogMiddleware."""

    __tablename__ = "action_logs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)

    # nullable — anonymous / unauthenticated requests (e.g. /api/auth/register)
    user_id: Mapped[int | None] = mapped_column(Integer, nullable=True, index=True)

    # "POST /api/tickets/book", "DELETE /api/seats/42", etc.
    action: Mapped[str] = mapped_column(String, nullable=False, index=True)

    # request.client.host or X-Forwarded-For (behind Traefik)
    ip_address: Mapped[str | None] = mapped_column(String, nullable=True)

    # Optional structured payload (response body excerpt, error detail, …)
    details: Mapped[dict | None] = mapped_column(JSONB, nullable=True)

    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        index=True,
    )