from datetime import datetime, timezone

from sqlalchemy import DateTime, ForeignKey, Integer, JSON, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from .database import Base


def utc_now() -> datetime:
    return datetime.now(timezone.utc)


class RawEvent(Base):
    __tablename__ = "raw_events"
    __table_args__ = (UniqueConstraint("source", "device_id", "external_id", name="uq_raw_event"),)

    id: Mapped[int] = mapped_column(primary_key=True)
    source: Mapped[str] = mapped_column(String(32), index=True)
    device_id: Mapped[str] = mapped_column(String(128), index=True)
    external_id: Mapped[str] = mapped_column(String(128))
    project_slug: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
    occurred_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
    payload: Mapped[dict] = mapped_column(JSON)
    received_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)


class TimeEntry(Base):
    __tablename__ = "time_entries"
    __table_args__ = (UniqueConstraint("source", "device_id", "external_id", name="uq_time_entry"),)

    id: Mapped[int] = mapped_column(primary_key=True)
    source: Mapped[str] = mapped_column(String(32), index=True)
    device_id: Mapped[str] = mapped_column(String(128), default="server", index=True)
    external_id: Mapped[str] = mapped_column(String(128))
    kind: Mapped[str] = mapped_column(String(32), default="tracked", index=True)
    status: Mapped[str] = mapped_column(String(32), default="accepted", index=True)
    start_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), index=True)
    end_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), index=True)
    duration_seconds: Mapped[int] = mapped_column(Integer)
    task: Mapped[str] = mapped_column(String(512), default="")
    project_slug: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
    notes: Mapped[str] = mapped_column(Text, default="")
    raw_event_id: Mapped[int | None] = mapped_column(ForeignKey("raw_events.id"), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now, onupdate=utc_now)


class CallImport(Base):
    __tablename__ = "call_imports"

    id: Mapped[int] = mapped_column(primary_key=True)
    filename: Mapped[str] = mapped_column(String(512))
    stored_path: Mapped[str] = mapped_column(String(1024))
    extraction_status: Mapped[str] = mapped_column(String(32), default="uploaded")
    extracted_text: Mapped[str] = mapped_column(Text, default="")
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)