import enum
import uuid as _uuid
from datetime import datetime
from decimal import Decimal

from sqlalchemy import DateTime, Enum, ForeignKey, Integer, Numeric, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import Base


class JobStatus(enum.Enum):
    queued = "queued"
    printing = "printing"
    done = "done"
    failed = "failed"
    cancelled = "cancelled"


class PrintJob(Base):
    __tablename__ = "print_jobs"

    id: Mapped[int] = mapped_column(primary_key=True)
    job_uuid: Mapped[str | None] = mapped_column(String(36), unique=True, default=lambda: str(_uuid.uuid4()))
    printer_id: Mapped[int | None] = mapped_column(ForeignKey("printers.id"))
    filament_id: Mapped[int | None] = mapped_column(ForeignKey("filaments.id"))
    bracket_id: Mapped[int | None] = mapped_column(ForeignKey("job_brackets.id"))
    name: Mapped[str] = mapped_column(String(200))
    customer: Mapped[str | None] = mapped_column(String(200))
    file_name: Mapped[str | None] = mapped_column(String(255))
    status: Mapped[JobStatus] = mapped_column(Enum(JobStatus), default=JobStatus.queued)
    queue_position: Mapped[int | None] = mapped_column(Integer)
    started_at: Mapped[datetime | None] = mapped_column(DateTime)
    finished_at: Mapped[datetime | None] = mapped_column(DateTime)
    duration_minutes: Mapped[int | None] = mapped_column(Integer)
    filament_used_g: Mapped[Decimal | None] = mapped_column(Numeric(8, 2))
    cost_eur: Mapped[Decimal | None] = mapped_column(Numeric(8, 2))
    notes: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now()
    )

    printer: Mapped["Printer"] = relationship(back_populates="jobs")
    filament: Mapped["Filament | None"] = relationship(back_populates="jobs")
    bracket: Mapped["JobBracket | None"] = relationship(back_populates="jobs")
    logs: Mapped[list["JobLog"]] = relationship(
        back_populates="job", order_by="JobLog.created_at.desc()"
    )