import uuid
from datetime import datetime, timezone

from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text
from sqlalchemy.dialects.postgresql import JSONB, UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


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


class TrackedLink(Base):
    __tablename__ = "tracked_links"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    activity_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("activities.id"))
    short_code: Mapped[str] = mapped_column(String(20), unique=True, nullable=False)
    destination_url: Mapped[str] = mapped_column(Text, nullable=False)
    title: Mapped[str | None] = mapped_column(String(300))
    content_type: Mapped[str | None] = mapped_column(String(50))  # pdf | pptx | article | video | youtube
    sharepoint_item_id: Mapped[str | None] = mapped_column(String(255))
    shared_in_channel: Mapped[str | None] = mapped_column(String(200))
    shared_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    shared_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"))
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    click_count: Mapped[int] = mapped_column(Integer, default=0)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)

    access_logs: Mapped[list["ContentAccessLog"]] = relationship(back_populates="tracked_link")


class ContentAccessLog(Base):
    __tablename__ = "content_access_logs"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    tracked_link_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("tracked_links.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"))
    user_email: Mapped[str | None] = mapped_column(String(255))
    accessed_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)
    user_agent: Mapped[str | None] = mapped_column(Text)
    ip_address: Mapped[str | None] = mapped_column(String(45))

    tracked_link: Mapped[TrackedLink] = relationship(back_populates="access_logs")


class Quiz(Base):
    __tablename__ = "quizzes"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    activity_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("activities.id"))
    title: Mapped[str] = mapped_column(String(300), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    passing_score_pct: Mapped[int] = mapped_column(Integer, default=70)
    questions: Mapped[dict] = mapped_column(JSONB, nullable=False)
    time_limit_minutes: Mapped[int | None] = mapped_column(Integer)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    created_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)

    attempts: Mapped[list["QuizAttempt"]] = relationship(back_populates="quiz")


class QuizAttempt(Base):
    __tablename__ = "quiz_attempts"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    quiz_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    answers: Mapped[dict] = mapped_column(JSONB, nullable=False)
    score_pct: Mapped[int] = mapped_column(Integer, nullable=False)
    passed: Mapped[bool] = mapped_column(Boolean, nullable=False)
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    completed_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)
    xp_awarded: Mapped[int] = mapped_column(Integer, default=0)

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