from __future__ import annotations
from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, JSON, Enum
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.database import Base


class VersionConfig(Base):
    __tablename__ = "version_config"

    id = Column(Integer, primary_key=True, autoincrement=True)
    stats_iterations = Column(Integer)
    stats_years = Column(Integer)
    stats_guests = Column(String(50))
    quote_text = Column(Text)
    quote_author = Column(String(200))
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())

    upgrades = relationship("VersionUpgrade", back_populates="config", cascade="all, delete-orphan", order_by="VersionUpgrade.sort_order")
    highlights = relationship("VersionHighlight", back_populates="config", cascade="all, delete-orphan", order_by="VersionHighlight.sort_order")
    compare = relationship("VersionCompare", back_populates="config", uselist=False, cascade="all, delete-orphan")
    timeline = relationship("VersionTimeline", back_populates="config", cascade="all, delete-orphan", order_by="VersionTimeline.sort_order")
    philosophy = relationship("VersionPhilosophy", back_populates="config", cascade="all, delete-orphan", order_by="VersionPhilosophy.sort_order")


class VersionUpgrade(Base):
    __tablename__ = "version_upgrades"

    id = Column(Integer, primary_key=True, autoincrement=True)
    config_id = Column(Integer, ForeignKey("version_config.id", ondelete="CASCADE"), nullable=False)
    tag = Column(String(50))
    name = Column(String(200))
    description = Column(Text)
    reason = Column(Text)
    sort_order = Column(Integer, default=0)

    config = relationship("VersionConfig", back_populates="upgrades")


class VersionHighlight(Base):
    __tablename__ = "version_highlights"

    id = Column(Integer, primary_key=True, autoincrement=True)
    config_id = Column(Integer, ForeignKey("version_config.id", ondelete="CASCADE"), nullable=False)
    label = Column(String(50))
    text = Column(Text)
    sort_order = Column(Integer, default=0)

    config = relationship("VersionConfig", back_populates="highlights")


class VersionCompare(Base):
    __tablename__ = "version_compare"

    id = Column(Integer, primary_key=True, autoincrement=True)
    config_id = Column(Integer, ForeignKey("version_config.id", ondelete="CASCADE"), nullable=False)
    headers = Column(JSON)
    rows = Column(JSON)

    config = relationship("VersionConfig", back_populates="compare")


class VersionTimeline(Base):
    __tablename__ = "version_timeline"

    id = Column(Integer, primary_key=True, autoincrement=True)
    config_id = Column(Integer, ForeignKey("version_config.id", ondelete="CASCADE"), nullable=False)
    version = Column(String(20), nullable=False)
    date = Column(String(20))
    title = Column(String(200))
    reason = Column(Text)
    sort_order = Column(Integer, default=0)

    config = relationship("VersionConfig", back_populates="timeline")
    changes = relationship("VersionTimelineChange", back_populates="timeline", cascade="all, delete-orphan", order_by="VersionTimelineChange.sort_order")


class VersionTimelineChange(Base):
    __tablename__ = "version_timeline_changes"

    id = Column(Integer, primary_key=True, autoincrement=True)
    timeline_id = Column(Integer, ForeignKey("version_timeline.id", ondelete="CASCADE"), nullable=False)
    type = Column(Enum("add", "update", "remove"), nullable=False)
    text = Column(Text, nullable=False)
    sort_order = Column(Integer, default=0)

    timeline = relationship("VersionTimeline", back_populates="changes")


class VersionPhilosophy(Base):
    __tablename__ = "version_philosophy"

    id = Column(Integer, primary_key=True, autoincrement=True)
    config_id = Column(Integer, ForeignKey("version_config.id", ondelete="CASCADE"), nullable=False)
    label = Column(String(50))
    text = Column(Text)
    sort_order = Column(Integer, default=0)

    config = relationship("VersionConfig", back_populates="philosophy")