CREATE EXTENSION IF NOT EXISTS pgcrypto;

CREATE TABLE IF NOT EXISTS posts (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  title TEXT NOT NULL,
  slug TEXT NOT NULL UNIQUE,
  content TEXT NOT NULL DEFAULT '',
  excerpt TEXT NOT NULL DEFAULT '',
  featured_image TEXT,
  status TEXT NOT NULL DEFAULT 'draft',
  published_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  CONSTRAINT posts_status_check CHECK (status IN ('published', 'draft', 'private'))
);

CREATE INDEX IF NOT EXISTS posts_status_published_at_idx
  ON posts (status, published_at DESC);

CREATE TABLE IF NOT EXISTS pages (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  title TEXT NOT NULL,
  slug TEXT NOT NULL UNIQUE,
  content TEXT NOT NULL DEFAULT '',
  featured_image TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS tags (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name TEXT NOT NULL,
  slug TEXT NOT NULL UNIQUE,
  description TEXT NOT NULL DEFAULT '',
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS post_tags (
  post_id UUID NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
  tag_id UUID NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  PRIMARY KEY (post_id, tag_id)
);

CREATE INDEX IF NOT EXISTS post_tags_tag_id_idx
  ON post_tags (tag_id);