"""
Forum MVP models - Categories, Threads, Posts, Reactions, Reports.

Job ID: MTAD-IMPL-2025-11-18-CL
"""

from sqlalchemy import Column, String, Text, Boolean, DateTime, Integer, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from app.database import Base


class ForumCategory(Base):
    """Forum Category - Discussion categories."""

    __tablename__ = "forum_categories"

    id = Column(String(36), primary_key=True, index=True)
    name = Column(String(255), unique=True, nullable=False, index=True)
    description = Column(Text, nullable=True)
    order = Column(Integer, default=0, index=True)
    created_at = Column(DateTime, server_default=func.now())
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())

    # Relationships
    threads = relationship("ForumThread", back_populates="category", cascade="all, delete-orphan")


class ForumThread(Base):
    """Forum Thread - Discussion thread."""

    __tablename__ = "forum_threads"

    id = Column(String(36), primary_key=True, index=True)
    category_id = Column(String(36), ForeignKey("forum_categories.id"), index=True, nullable=False)
    author_id = Column(String(36), ForeignKey("users.id"), index=True, nullable=False)
    title = Column(String(500), nullable=False, index=True)
    pinned = Column(Boolean, default=False, index=True)
    locked = Column(Boolean, default=False, index=True)
    created_at = Column(DateTime, server_default=func.now(), index=True)
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), index=True)

    # Relationships
    category = relationship("ForumCategory", back_populates="threads")
    author = relationship("User", back_populates="forum_threads")
    posts = relationship("ForumPost", back_populates="thread", cascade="all, delete-orphan")


class ForumPost(Base):
    """Forum Post - Individual post/reply in a thread."""

    __tablename__ = "forum_posts"

    id = Column(String(36), primary_key=True, index=True)
    thread_id = Column(String(36), ForeignKey("forum_threads.id"), index=True, nullable=False)
    author_id = Column(String(36), ForeignKey("users.id"), index=True, nullable=False)
    parent_post_id = Column(String(36), ForeignKey("forum_posts.id"), index=True, nullable=True)
    content = Column(Text, nullable=False)  # May contain PHI
    deleted_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, server_default=func.now(), index=True)
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), index=True)

    # Relationships
    thread = relationship("ForumThread", back_populates="posts")
    author = relationship("User", back_populates="forum_posts")
    reactions = relationship("ForumReaction", back_populates="post", cascade="all, delete-orphan")
    reports = relationship("ForumReport", back_populates="post", cascade="all, delete-orphan")


class ForumReaction(Base):
    """Forum Reaction - Emoji reactions to posts."""

    __tablename__ = "forum_reactions"

    id = Column(String(36), primary_key=True, index=True)
    post_id = Column(String(36), ForeignKey("forum_posts.id"), index=True, nullable=False)
    user_id = Column(String(36), ForeignKey("users.id"), index=True, nullable=False)
    emoji_code = Column(String(20), nullable=False)  # e.g., "👍", "❤️", "😢"
    created_at = Column(DateTime, server_default=func.now(), index=True)

    # Relationships
    post = relationship("ForumPost", back_populates="reactions")
    user = relationship("User", back_populates="forum_reactions")


class ForumReport(Base):
    """Forum Report - Content moderation reports."""

    __tablename__ = "forum_reports"

    id = Column(String(36), primary_key=True, index=True)
    post_id = Column(String(36), ForeignKey("forum_posts.id"), index=True, nullable=False)
    reporter_id = Column(String(36), ForeignKey("users.id"), index=True, nullable=False)
    reason = Column(String(255), nullable=False)
    status = Column(String(50), default="open", index=True)  # open, resolved, dismissed
    moderator_notes = Column(Text, nullable=True)
    resolved_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, server_default=func.now(), index=True)

    # Relationships
    post = relationship("ForumPost", back_populates="reports")
    reporter = relationship("User", back_populates="forum_reports")