"""
应用更新模型
============

Tauri updater 插件所需的数据结构。
"""

from datetime import UTC, datetime

from sqlalchemy import (
    BigInteger,
    Boolean,
    DateTime,
    ForeignKey,
    Integer,
    String,
    Text,
    UniqueConstraint,
)
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.session import Base


class AppRelease(Base):
    """应用版本发布记录"""

    __tablename__ = "mjk_app_releases"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    version: Mapped[str] = mapped_column(String(20), unique=True, nullable=False, index=True)
    release_date: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    notes: Mapped[str] = mapped_column(Text, nullable=False, default="")
    mandatory: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(UTC), nullable=False
    )

    packages: Mapped[list["ReleasePackage"]] = relationship(
        "ReleasePackage",
        back_populates="release",
        cascade="all, delete-orphan",
        lazy="selectin",
    )


class ReleasePackage(Base):
    """平台安装包信息"""

    __tablename__ = "mjk_app_release_packages"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    release_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("mjk_app_releases.id", ondelete="CASCADE"),
        nullable=False,
    )
    platform: Mapped[str] = mapped_column(String(20), nullable=False)
    architecture: Mapped[str] = mapped_column(String(20), nullable=False)
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    file_url: Mapped[str] = mapped_column(String(500), nullable=False)
    file_size: Mapped[int] = mapped_column(BigInteger, nullable=False)
    signature: Mapped[str] = mapped_column(Text, nullable=False)
    download_count: Mapped[int] = mapped_column(Integer, default=0)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(UTC), nullable=False
    )

    release: Mapped["AppRelease"] = relationship("AppRelease", back_populates="packages")

    __table_args__ = (
        UniqueConstraint(
            "release_id",
            "platform",
            "architecture",
            "filename",
            name="uix_app_pkg_platform_arch_filename",
        ),
    )