"""Wiki plugin models — articles, categories, versions (H-WIKI, H-VER)."""

from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from sqlalchemy import ForeignKey, Index, Integer, String, Text
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin
from app.models.owned_mixin import OwnedMixin


class WikiCategory(Base, TenantMixin, OwnedMixin):
    """Wiki category for organizing articles."""

    __tablename__ = "wiki_categories"
    __table_args__ = (
        Index("ix_wiki_cat_tenant", "tenant_id"),
        Index("ix_wiki_cat_tenant_slug", "tenant_id", "slug"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(200), nullable=False)
    slug: Mapped[str] = mapped_column(String(200), nullable=False)
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    parent_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("wiki_categories.id", ondelete="SET NULL"),
        nullable=True,
    )
    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0)


class WikiArticle(Base, TenantMixin, OwnedMixin):
    """Wiki article with Markdown content, tags, and entity links (H-WIKI, H-LINK)."""

    __tablename__ = "wiki_articles"
    __table_args__ = (
        Index("ix_wiki_art_tenant", "tenant_id"),
        Index("ix_wiki_art_tenant_category", "tenant_id", "category_id"),
        Index("ix_wiki_art_tenant_slug", "tenant_id", "slug"),
        Index("ix_wiki_art_tenant_status", "tenant_id", "status"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    title: Mapped[str] = mapped_column(String(300), nullable=False)
    slug: Mapped[str] = mapped_column(String(300), nullable=False)
    content: Mapped[str] = mapped_column(Text, nullable=False, default="")
    content_html: Mapped[str | None] = mapped_column(Text, nullable=True)
    summary: Mapped[str | None] = mapped_column(Text, nullable=True)
    category_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("wiki_categories.id", ondelete="SET NULL"),
        nullable=True,
    )
    tags: Mapped[list[str]] = mapped_column(JSONB, nullable=False, default=list)
    status: Mapped[str] = mapped_column(
        String(20), nullable=False, default="draft"
    )  # draft, published, archived
    entity_links: Mapped[list[dict[str, Any]]] = mapped_column(
        JSONB, nullable=False, default=list
    )  # [{"entity_type": "contact", "entity_id": "..."}]
    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    published_at: Mapped[datetime | None] = mapped_column(
        nullable=True
    )


class WikiArticleVersion(Base, TenantMixin):
    """Article version history for diff and restore (H-VER)."""

    __tablename__ = "wiki_article_versions"
    __table_args__ = (
        Index("ix_wiki_ver_tenant_article", "tenant_id", "article_id"),
        Index("ix_wiki_ver_tenant_version", "tenant_id", "article_id", "version"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    article_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("wiki_articles.id", ondelete="CASCADE"),
        nullable=False,
    )
    version: Mapped[int] = mapped_column(Integer, nullable=False)
    title: Mapped[str] = mapped_column(String(300), nullable=False)
    content: Mapped[str] = mapped_column(Text, nullable=False)
    edited_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )
    edit_comment: Mapped[str | None] = mapped_column(Text, nullable=True)