"""SQLAlchemy data models."""

from datetime import datetime
from typing import Optional

from sqlalchemy import ForeignKey, Integer, String, Text
from sqlalchemy.ext.asyncio import AsyncAttrs
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship


class Base(AsyncAttrs, DeclarativeBase):
    pass


class Vendor(Base):
    __tablename__ = "vendor"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    registered: Mapped[datetime] = mapped_column()
    name: Mapped[str] = mapped_column(String(64))
    empty_spool_weight: Mapped[Optional[float]] = mapped_column(comment="The weight of an empty spool.")
    comment: Mapped[Optional[str]] = mapped_column(String(1024))
    filaments: Mapped[list["Filament"]] = relationship(back_populates="vendor")
    external_id: Mapped[Optional[str]] = mapped_column(String(256))
    extra: Mapped[list["VendorField"]] = relationship(
        back_populates="vendor",
        cascade="save-update, merge, delete, delete-orphan",
        lazy="joined",
    )


class Filament(Base):
    __tablename__ = "filament"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    registered: Mapped[datetime] = mapped_column()
    name: Mapped[Optional[str]] = mapped_column(String(64))
    vendor_id: Mapped[Optional[int]] = mapped_column(ForeignKey("vendor.id"))
    vendor: Mapped[Optional["Vendor"]] = relationship(back_populates="filaments")
    spools: Mapped[list["Spool"]] = relationship(back_populates="filament")
    material: Mapped[Optional[str]] = mapped_column(String(64))
    price: Mapped[Optional[float]] = mapped_column()
    density: Mapped[float] = mapped_column()
    diameter: Mapped[float] = mapped_column()
    weight: Mapped[Optional[float]] = mapped_column(comment="The filament weight of a full spool (net weight).")
    spool_weight: Mapped[Optional[float]] = mapped_column(comment="The weight of an empty spool.")
    article_number: Mapped[Optional[str]] = mapped_column(String(64))
    comment: Mapped[Optional[str]] = mapped_column(String(1024))
    settings_extruder_temp: Mapped[Optional[int]] = mapped_column(comment="Overridden extruder temperature (deprecated, use min/max).")
    settings_bed_temp: Mapped[Optional[int]] = mapped_column(comment="Overridden bed temperature (deprecated, use min/max).")
    settings_extruder_temp_min: Mapped[Optional[int]] = mapped_column(comment="Minimum extruder temperature.")
    settings_extruder_temp_max: Mapped[Optional[int]] = mapped_column(comment="Maximum extruder temperature.")
    settings_bed_temp_min: Mapped[Optional[int]] = mapped_column(comment="Minimum bed temperature.")
    settings_bed_temp_max: Mapped[Optional[int]] = mapped_column(comment="Maximum bed temperature.")
    color_hex: Mapped[Optional[str]] = mapped_column(String(8))
    multi_color_hexes: Mapped[Optional[str]] = mapped_column(String(128))
    multi_color_direction: Mapped[Optional[str]] = mapped_column(String(16))
    external_id: Mapped[Optional[str]] = mapped_column(String(256))
    extra: Mapped[list["FilamentField"]] = relationship(
        back_populates="filament",
        cascade="save-update, merge, delete, delete-orphan",
        lazy="joined",
    )


class Spool(Base):
    __tablename__ = "spool"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    registered: Mapped[datetime] = mapped_column()
    first_used: Mapped[Optional[datetime]] = mapped_column()
    last_used: Mapped[Optional[datetime]] = mapped_column()
    price: Mapped[Optional[float]] = mapped_column()
    filament_id: Mapped[int] = mapped_column(ForeignKey("filament.id"))
    filament: Mapped["Filament"] = relationship(back_populates="spools")
    initial_weight: Mapped[Optional[float]] = mapped_column()
    spool_weight: Mapped[Optional[float]] = mapped_column()
    used_weight: Mapped[float] = mapped_column()
    location: Mapped[Optional[str]] = mapped_column(String(64))
    lot_nr: Mapped[Optional[str]] = mapped_column(String(64))
    comment: Mapped[Optional[str]] = mapped_column(String(1024))
    archived: Mapped[Optional[bool]] = mapped_column()
    needs_weighing: Mapped[Optional[bool]] = mapped_column(
        default=False,
        comment="Flag indicating spool needs manual weigh-in (e.g., after cancelled print).",
    )
    extra: Mapped[list["SpoolField"]] = relationship(
        back_populates="spool",
        cascade="save-update, merge, delete, delete-orphan",
        lazy="joined",
    )
    adjustments: Mapped[list["SpoolAdjustment"]] = relationship(
        back_populates="spool",
        cascade="save-update, merge, delete, delete-orphan",
        lazy="noload",  # Don't load by default, only on explicit request
    )


class SpoolAdjustment(Base):
    """Track history of spool weight/length adjustments."""

    __tablename__ = "spool_adjustment"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    spool_id: Mapped[int] = mapped_column(ForeignKey("spool.id", ondelete="CASCADE"), index=True)
    spool: Mapped["Spool"] = relationship(back_populates="adjustments")
    timestamp: Mapped[datetime] = mapped_column(comment="When the adjustment was made.")
    adjustment_type: Mapped[str] = mapped_column(String(16), comment="Type: 'weight' or 'length'.")
    value: Mapped[float] = mapped_column(comment="Amount adjusted (negative = used, positive = added).")
    comment: Mapped[Optional[str]] = mapped_column(String(256), comment="Optional user comment.")


class PrintJob(Base):
    """Track pending/completed print jobs from slicer."""

    __tablename__ = "print_job"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    spool_id: Mapped[int] = mapped_column(ForeignKey("spool.id", ondelete="CASCADE"), index=True)
    spool: Mapped["Spool"] = relationship()
    created: Mapped[datetime] = mapped_column(comment="When the job was created (slice time).")
    finished: Mapped[Optional[datetime]] = mapped_column(comment="When the job was completed/cancelled.")
    filename: Mapped[str] = mapped_column(String(256), comment="G-code filename.")
    filament_used_g: Mapped[float] = mapped_column(comment="Estimated filament usage in grams.")
    filament_used_mm: Mapped[Optional[float]] = mapped_column(comment="Estimated filament usage in mm.")
    status: Mapped[str] = mapped_column(
        String(16),
        default="pending",
        comment="Status: 'pending', 'completed', 'cancelled'.",
    )


class Setting(Base):
    __tablename__ = "setting"

    key: Mapped[str] = mapped_column(String(64), primary_key=True, index=True)
    value: Mapped[str] = mapped_column(Text())
    last_updated: Mapped[datetime] = mapped_column()


class VendorField(Base):
    __tablename__ = "vendor_field"

    vendor_id: Mapped[int] = mapped_column(ForeignKey("vendor.id"), primary_key=True, index=True)
    vendor: Mapped["Vendor"] = relationship(back_populates="extra")
    key: Mapped[str] = mapped_column(String(64), primary_key=True, index=True)
    value: Mapped[str] = mapped_column(Text())


class FilamentField(Base):
    __tablename__ = "filament_field"

    filament_id: Mapped[int] = mapped_column(ForeignKey("filament.id"), primary_key=True, index=True)
    filament: Mapped["Filament"] = relationship(back_populates="extra")
    key: Mapped[str] = mapped_column(String(64), primary_key=True, index=True)
    value: Mapped[str] = mapped_column(Text())


class SpoolField(Base):
    __tablename__ = "spool_field"

    spool_id: Mapped[int] = mapped_column(ForeignKey("spool.id"), primary_key=True, index=True)
    spool: Mapped["Spool"] = relationship(back_populates="extra")
    key: Mapped[str] = mapped_column(String(64), primary_key=True, index=True)
    value: Mapped[str] = mapped_column(Text())


class User(Base):
    """User account for authentication."""

    __tablename__ = "user"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    username: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    hashed_password: Mapped[str] = mapped_column(String(128))
    role: Mapped[str] = mapped_column(
        String(16),
        default="viewer",
        comment="Role: 'admin', 'editor', 'operator', 'viewer'.",
    )
    is_active: Mapped[bool] = mapped_column(default=True)
    created_at: Mapped[datetime] = mapped_column()