import uuid
from datetime import datetime

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


class Base(DeclarativeBase):
    pass


class Participant(Base):
    __tablename__ = "participants"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    email: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
    timezone: Mapped[str] = mapped_column(String(50), nullable=False, default="America/Toronto")
    ics_url: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False
    )


class BusyBlock(Base):
    __tablename__ = "busy_blocks"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    participant_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), nullable=False, index=True
    )
    start_time: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    end_time: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)