from __future__ import annotations

from datetime import datetime, timezone
from typing import Any

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

from app.database import Base


def utcnow() -> datetime:
    return datetime.now(timezone.utc)


AVATAR_ANIMALS = (
    "fox",
    "owl",
    "bear",
    "otter",
    "koala",
    "tiger",
    "frog",
    "penguin",
)

AVATAR_COLORS = (
    "avatar-1",
    "avatar-2",
    "avatar-3",
    "avatar-4",
    "avatar-5",
    "avatar-6",
    "avatar-7",
    "avatar-8",
)

GENDER_OPTIONS = (
    "woman",
    "man",
    "non_binary",
    "agender",
    "genderqueer",
    "two_spirit",
    "other",
    "prefer_not_to_say",
)


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    auth_sub: Mapped[str] = mapped_column(String(190), unique=True, nullable=False, index=True)
    email: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
    nickname: Mapped[str] = mapped_column(String(48), unique=True, nullable=False, index=True)
    first_name: Mapped[str] = mapped_column(String(80), nullable=False, default="")
    last_name: Mapped[str] = mapped_column(String(80), nullable=False, default="")
    age: Mapped[int | None] = mapped_column(Integer, nullable=True)
    gender: Mapped[str] = mapped_column(String(40), nullable=False, default="prefer_not_to_say")
    gender_custom: Mapped[str | None] = mapped_column(String(80), nullable=True)
    avatar_animal: Mapped[str] = mapped_column(String(32), nullable=False, default="fox")
    avatar_color: Mapped[str] = mapped_column(String(32), nullable=False, default="avatar-1")
    public_website_consent: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    consent_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    onboarded: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    is_admin: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    is_banned: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    ban_reason: Mapped[str | None] = mapped_column(String(255), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)

    api_keys: Mapped[list[ApiKey]] = relationship(
        "ApiKey", back_populates="user", cascade="all, delete-orphan"
    )
    quizzes: Mapped[list[Quiz]] = relationship(
        "Quiz", back_populates="author", cascade="all, delete-orphan"
    )
    attempts: Mapped[list[QuizAttempt]] = relationship(
        "QuizAttempt", back_populates="user", cascade="all, delete-orphan"
    )
    votes: Mapped[list[QuizVote]] = relationship(
        "QuizVote", back_populates="user", cascade="all, delete-orphan"
    )
    favourites: Mapped[list[Favourite]] = relationship(
        "Favourite",
        back_populates="user",
        cascade="all, delete-orphan",
        order_by="Favourite.position",
    )


class ApiKey(Base):
    __tablename__ = "api_keys"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    name: Mapped[str] = mapped_column(String(80), nullable=False)
    key_prefix: Mapped[str] = mapped_column(String(24), nullable=False)
    key_hash: Mapped[str] = mapped_column(String(64), unique=True, nullable=False, index=True)
    expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    last_used_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)

    user: Mapped[User] = relationship("User", back_populates="api_keys")


class Quiz(Base):
    __tablename__ = "quizzes"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    share_slug: Mapped[str] = mapped_column(String(40), unique=True, nullable=False, index=True)
    author_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    title: Mapped[str] = mapped_column(String(140), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False, default="")
    is_public: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True, index=True)
    is_removed: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False, index=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )

    author: Mapped[User] = relationship("User", back_populates="quizzes")
    questions: Mapped[list[Question]] = relationship(
        "Question",
        back_populates="quiz",
        cascade="all, delete-orphan",
        order_by="Question.position",
    )
    attempts: Mapped[list[QuizAttempt]] = relationship(
        "QuizAttempt", back_populates="quiz", cascade="all, delete-orphan"
    )
    votes: Mapped[list[QuizVote]] = relationship(
        "QuizVote", back_populates="quiz", cascade="all, delete-orphan"
    )
    favourited_by: Mapped[list[Favourite]] = relationship(
        "Favourite", back_populates="quiz", cascade="all, delete-orphan"
    )


class Question(Base):
    __tablename__ = "questions"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    quiz_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False, index=True
    )
    position: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    question_type: Mapped[str] = mapped_column(String(24), nullable=False)
    prompt: Mapped[str] = mapped_column(Text, nullable=False)
    options: Mapped[list[dict[str, Any]]] = mapped_column(JSON, nullable=False, default=list)
    correct_answer: Mapped[str] = mapped_column(String(500), nullable=False)
    accepted_answers: Mapped[list[str]] = mapped_column(JSON, nullable=False, default=list)

    quiz: Mapped[Quiz] = relationship("Quiz", back_populates="questions")


class QuizAttempt(Base):
    __tablename__ = "quiz_attempts"
    __table_args__ = (
        Index("ix_quiz_attempts_quiz_score", "quiz_id", "score_percent", "completed_at"),
        Index("ix_quiz_attempts_user_quiz", "user_id", "quiz_id", "completed_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    quiz_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False
    )
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False
    )
    score_count: Mapped[int] = mapped_column(Integer, nullable=False)
    total_questions: Mapped[int] = mapped_column(Integer, nullable=False)
    score_percent: Mapped[float] = mapped_column(Float, nullable=False)
    answers_payload: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False, default=dict)
    completed_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )

    quiz: Mapped[Quiz] = relationship("Quiz", back_populates="attempts")
    user: Mapped[User] = relationship("User", back_populates="attempts")


class QuizVote(Base):
    __tablename__ = "quiz_votes"
    __table_args__ = (UniqueConstraint("quiz_id", "user_id", name="uq_quiz_vote_user"),)

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    quiz_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False, index=True
    )
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    value: Mapped[int] = mapped_column(Integer, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )

    quiz: Mapped[Quiz] = relationship("Quiz", back_populates="votes")
    user: Mapped[User] = relationship("User", back_populates="votes")


class Favourite(Base):
    __tablename__ = "favourites"
    __table_args__ = (UniqueConstraint("user_id", "quiz_id", name="uq_favourite_user_quiz"),)

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    quiz_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False, index=True
    )
    position: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )

    user: Mapped[User] = relationship("User", back_populates="favourites")
    quiz: Mapped[Quiz] = relationship("Quiz", back_populates="favourited_by")