"""
Telemetry events (4A).

Store canonical product events for funnel KPIs:
- Deal funnel: listing_view → inquiry_created → message_sent → listing_marked_sold
- Yield funnel: yield_connected → yield_click → yield_conversion → payout_paid
"""

from __future__ import annotations

from datetime import datetime
from typing import Optional

from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.database import Base


class TelemetryEvent(Base):
    __tablename__ = "telemetry_events"

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

    # Who
    user_id: Mapped[Optional[int]] = mapped_column(ForeignKey("users.id"), nullable=True, index=True)

    # What
    event_name: Mapped[str] = mapped_column(String(60), nullable=False, index=True)

    # Entity links (optional)
    listing_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, index=True)
    inquiry_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, index=True)
    yield_domain_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, index=True)
    click_id: Mapped[Optional[str]] = mapped_column(String(64), nullable=True, index=True)
    domain: Mapped[Optional[str]] = mapped_column(String(255), nullable=True, index=True)

    # Context
    source: Mapped[Optional[str]] = mapped_column(String(30), nullable=True)  # "public" | "terminal" | "webhook" | "scheduler" | "admin"
    ip_hash: Mapped[Optional[str]] = mapped_column(String(64), nullable=True)
    user_agent: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    referrer: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    metadata_json: Mapped[Optional[str]] = mapped_column(Text, nullable=True)  # JSON string

    # Flags
    is_authenticated: Mapped[Optional[bool]] = mapped_column(Boolean, nullable=True)

    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, index=True)

    __table_args__ = (
        Index("ix_telemetry_event_name_created", "event_name", "created_at"),
        Index("ix_telemetry_user_created", "user_id", "created_at"),
        Index("ix_telemetry_listing_created", "listing_id", "created_at"),
        Index("ix_telemetry_yield_created", "yield_domain_id", "created_at"),
    )