"""Vehicle and VehicleAssignment models for fleet management."""

import uuid
from datetime import datetime

from sqlalchemy import String, DateTime, ForeignKey, func, Float, Text, Boolean
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class Vehicle(Base):
    """Represents a vehicle within a tenant account."""

    __tablename__ = "vehicles"

    id: Mapped[str] = mapped_column(
        String(36), primary_key=True, default=lambda: str(uuid.uuid4())
    )
    account_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("accounts.id", ondelete="CASCADE"), nullable=False
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    license_plate: Mapped[str | None] = mapped_column(
        String(50), nullable=True, unique=True
    )
    brand: Mapped[str | None] = mapped_column(String(100), nullable=True)
    model: Mapped[str | None] = mapped_column(String(100), nullable=True)
    year: Mapped[int | None] = mapped_column(nullable=True)
    color: Mapped[str | None] = mapped_column(String(50), nullable=True)
    vehicle_type: Mapped[str | None] = mapped_column(String(50), nullable=True)
    payload_capacity_kg: Mapped[float | None] = mapped_column(Float, nullable=True)
    load_volume_m3: Mapped[float | None] = mapped_column(Float, nullable=True)
    fuel_type: Mapped[str | None] = mapped_column(String(30), nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)

    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )

    # Relationships
    account: Mapped["Account"] = relationship("Account", back_populates="vehicles")
    assignments: Mapped[list["VehicleAssignment"]] = relationship(
        "VehicleAssignment", back_populates="vehicle", cascade="all, delete-orphan"
    )

    def __repr__(self) -> str:
        return f"<Vehicle {self.name} ({self.license_plate or 'no plate'})>"


class VehicleAssignment(Base):
    """Tracks vehicle assignment to projects/events."""

    __tablename__ = "vehicle_assignments"

    id: Mapped[str] = mapped_column(
        String(36), primary_key=True, default=lambda: str(uuid.uuid4())
    )
    vehicle_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("vehicles.id", ondelete="CASCADE"), nullable=False
    )
    project_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
    start_date: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False
    )
    end_date: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    status: Mapped[str] = mapped_column(
        String(20), nullable=False, default="assigned"
    )  # assigned, in_use, returned
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)

    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )

    # Relationships
    vehicle: Mapped["Vehicle"] = relationship("Vehicle", back_populates="assignments")

    def __repr__(self) -> str:
        return (
            f"<VehicleAssignment {self.vehicle_id}: {self.start_date}-{self.end_date}>"
        )