import uuid
from datetime import datetime

from sqlalchemy import String, Float, Integer, ForeignKey, Index, func, Text
from sqlalchemy import Uuid
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base, JSONType


class AttributionRecord(Base):
    __tablename__ = "attribution_records"

    id: Mapped[uuid.UUID] = mapped_column(
        Uuid(as_uuid=True),
        primary_key=True,
        default=uuid.uuid4,
    )
    user_id: Mapped[str] = mapped_column(
        Text,
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
    )
    brand_id: Mapped[uuid.UUID] = mapped_column(
        Uuid(as_uuid=True),
        ForeignKey("brands.id", ondelete="CASCADE"),
        nullable=False,
    )
    content_id: Mapped[uuid.UUID | None] = mapped_column(
        Uuid(as_uuid=True),
        ForeignKey("contents.id", ondelete="SET NULL"),
        nullable=True,
    )
    baseline_score: Mapped[float] = mapped_column(Float, nullable=False)
    current_score: Mapped[float | None] = mapped_column(Float, nullable=True)
    score_delta: Mapped[float | None] = mapped_column(Float, nullable=True)
    attribution_window_days: Mapped[int] = mapped_column(
        Integer, server_default="28", nullable=False,
    )
    published_at: Mapped[datetime | None] = mapped_column(nullable=True)
    window_end_at: Mapped[datetime | None] = mapped_column(nullable=True)
    status: Mapped[str] = mapped_column(
        String(20), server_default="tracking", nullable=False,
    )
    attributed_dimensions: Mapped[dict | None] = mapped_column(JSONType, nullable=True)
    roi_percentage: Mapped[float | None] = mapped_column(Float, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        server_default=func.now(),
        nullable=False,
    )
    updated_at: Mapped[datetime] = mapped_column(
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )

    brand: Mapped["Brand"] = relationship("Brand")
    content: Mapped["Content | None"] = relationship("Content")

    __table_args__ = (
        Index("idx_attribution_records_brand_id", "brand_id"),
        Index("idx_attribution_records_user_id", "user_id"),
        Index("idx_attribution_records_status", "status"),
        Index("idx_attribution_records_content_id", "content_id"),
    )