"""ORM-модели: User, VkAccount, Publication."""

from __future__ import annotations

import datetime
from typing import Optional

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


class Base(DeclarativeBase):
    pass


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    email: Mapped[Optional[str]] = mapped_column(String(255), nullable=True, unique=True)
    api_key_hash: Mapped[str] = mapped_column(String(64), nullable=False, unique=True)
    api_key_prefix: Mapped[str] = mapped_column(String(12), nullable=False, comment="Первые ~10 символов ключа для идентификации")
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    created_at: Mapped[datetime.datetime] = mapped_column(DateTime, server_default=func.now(), nullable=False)
    updated_at: Mapped[datetime.datetime] = mapped_column(DateTime, server_default=func.now(), onupdate=func.now(), nullable=False)

    vk_accounts: Mapped[list[VkAccount]] = relationship(back_populates="user", cascade="all, delete-orphan")


class VkAccount(Base):
    __tablename__ = "vk_accounts"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False, index=True)
    vk_user_id: Mapped[int] = mapped_column(Integer, nullable=False, comment="VK owner_id (положительный — пользователь, отрицательный — сообщество)")
    display_name: Mapped[str] = mapped_column(String(255), nullable=False, comment="Отображаемое имя (например, 'Моя стена')")
    access_token_enc: Mapped[str] = mapped_column(Text, nullable=False, comment="Зашифрованный VK-токен")
    token_type: Mapped[str] = mapped_column(String(10), default="user", nullable=False, comment="user | group")
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    expires_at: Mapped[Optional[datetime.datetime]] = mapped_column(DateTime, nullable=True)
    last_used_at: Mapped[Optional[datetime.datetime]] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[datetime.datetime] = mapped_column(DateTime, server_default=func.now(), nullable=False)

    user: Mapped[User] = relationship(back_populates="vk_accounts")
    publications: Mapped[list[Publication]] = relationship(back_populates="vk_account", cascade="all, delete-orphan")


class Publication(Base):
    __tablename__ = "publications"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    vk_account_id: Mapped[int] = mapped_column(ForeignKey("vk_accounts.id"), nullable=False, index=True)

    status: Mapped[str] = mapped_column(
        String(20),
        default="draft",
        nullable=False,
        comment="draft | scheduled | published | error",
    )

    # Входные данные
    markdown_original: Mapped[str] = mapped_column(Text, nullable=False, comment="Исходный Markdown")

    # Результат конвертации
    vk_text: Mapped[str] = mapped_column(Text, nullable=False, comment="Текст для VK")
    vk_format_data: Mapped[Optional[str]] = mapped_column(Text, nullable=True, comment="JSON format_data")

    # Результат публикации
    vk_post_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
    vk_owner_id: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
    attachments: Mapped[Optional[str]] = mapped_column(Text, nullable=True, comment="JSON attachments")

    # Отложенная публикация
    scheduled_at: Mapped[Optional[datetime.datetime]] = mapped_column(DateTime, nullable=True)
    published_at: Mapped[Optional[datetime.datetime]] = mapped_column(DateTime, nullable=True)

    # Ошибки
    error_message: Mapped[Optional[str]] = mapped_column(Text, nullable=True)

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

    vk_account: Mapped[VkAccount] = relationship(back_populates="publications")