from datetime import datetime
from typing import Any

from sqlalchemy import (
    ARRAY,
    BigInteger,
    Boolean,
    DateTime,
    ForeignKey,
    Integer,
    String,
    Text,
    UniqueConstraint,
    func,
)
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db import Base


class Role(Base):
    __tablename__ = "roles"

    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(String(64), unique=True)
    permissions: Mapped[list[str]] = mapped_column(ARRAY(String), default=list)
    is_system: Mapped[bool] = mapped_column(Boolean, default=False)


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(primary_key=True)
    username: Mapped[str] = mapped_column(String(64), unique=True)
    password_hash: Mapped[str] = mapped_column(String(255))
    role_id: Mapped[int] = mapped_column(ForeignKey("roles.id"))
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    must_change_password: Mapped[bool] = mapped_column(Boolean, default=True)
    must_change_username: Mapped[bool] = mapped_column(Boolean, default=False)
    token_version: Mapped[int] = mapped_column(Integer, default=0)
    f95_session: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    role: Mapped[Role] = relationship(lazy="joined")

    @property
    def permissions(self) -> list[str]:
        return sorted(self.role.permissions) if self.is_active else []


class Game(Base):
    __tablename__ = "games"

    id: Mapped[int] = mapped_column(primary_key=True)
    title: Mapped[str] = mapped_column(String(255))
    description: Mapped[str] = mapped_column(Text, default="")
    tags: Mapped[list[str]] = mapped_column(ARRAY(String), default=list)
    engine: Mapped[str] = mapped_column(String(32), default="renpy")
    cover_hash: Mapped[str | None] = mapped_column(String(80))
    gallery_hashes: Mapped[list[str]] = mapped_column(ARRAY(String(80)), default=list, server_default="{}")
    # the version "Play" opens; translations are published by merging into it
    main_version_id: Mapped[int | None] = mapped_column(
        ForeignKey("game_versions.id", ondelete="SET NULL", use_alter=True))
    created_by_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    created_by: Mapped[User | None] = relationship(lazy="joined")


class GameVersion(Base):
    __tablename__ = "game_versions"

    id: Mapped[int] = mapped_column(primary_key=True)
    game_id: Mapped[int] = mapped_column(ForeignKey("games.id", ondelete="CASCADE"), index=True)
    parent_id: Mapped[int | None] = mapped_column(ForeignKey("game_versions.id", ondelete="SET NULL"))
    owner_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"))
    name: Mapped[str] = mapped_column(String(255))
    description: Mapped[str] = mapped_column(Text, default="")
    # uploading -> queued -> converting -> ready | failed; importing = app.import_dir run
    status: Mapped[str] = mapped_column(String(16), default="uploading", index=True)
    # draft: visible to the owner and reviewers only
    visibility: Mapped[str] = mapped_column(String(16), default="published")
    kind: Mapped[str] = mapped_column(String(16), default="original")  # original|translation|mod
    progress: Mapped[str] = mapped_column(String(255), default="")
    upload_name: Mapped[str | None] = mapped_column(String(255))
    manifest: Mapped[dict[str, Any] | None] = mapped_column(JSONB)
    revision_id: Mapped[str | None] = mapped_column(String(36))
    base_revision_id: Mapped[str | None] = mapped_column(String(36))
    report: Mapped[dict[str, Any] | None] = mapped_column(JSONB)
    size_bytes: Mapped[int] = mapped_column(BigInteger, default=0)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    owner: Mapped[User | None] = relationship(lazy="joined")


class VersionHistory(Base):
    """Previous manifests of a version that was changed in place (e.g. a merged translation)."""
    __tablename__ = "version_history"

    id: Mapped[int] = mapped_column(primary_key=True)
    version_id: Mapped[int] = mapped_column(ForeignKey("game_versions.id", ondelete="CASCADE"),
                                            index=True)
    user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"))
    note: Mapped[str] = mapped_column(String(255), default="")
    manifest: Mapped[dict[str, Any]] = mapped_column(JSONB)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())


class Revision(Base):
    """Immutable snapshots retained independently of deletable version cards."""
    __tablename__ = "revisions"

    id: Mapped[str] = mapped_column(String(36), primary_key=True)
    game_id: Mapped[int] = mapped_column(ForeignKey("games.id", ondelete="CASCADE"), index=True)
    user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"))
    parents: Mapped[list[str]] = mapped_column(ARRAY(String), default=list)
    manifest: Mapped[dict[str, Any]] = mapped_column(JSONB)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())


class Save(Base):
    __tablename__ = "saves"
    __table_args__ = (UniqueConstraint("user_id", "version_id", "slot"),)

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
    version_id: Mapped[int] = mapped_column(ForeignKey("game_versions.id", ondelete="CASCADE"))
    slot: Mapped[str] = mapped_column(String(32))
    title: Mapped[str] = mapped_column(String(255), default="")
    data: Mapped[dict[str, Any]] = mapped_column(JSONB)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )


from app import revisions as _revisions  # noqa: E402,F401