CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  email TEXT NOT NULL UNIQUE,
  full_name TEXT,
  display_name TEXT,
  bio TEXT,
  avatar_url TEXT,
  role TEXT DEFAULT 'user',
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  username TEXT UNIQUE,
  mauth_token TEXT,
  phone TEXT,
  citizen_id TEXT,
  is_banned INTEGER DEFAULT 0,
  updated_at TEXT DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS posts (
  id TEXT PRIMARY KEY,
  author_email TEXT NOT NULL,
  content TEXT NOT NULL,
  image_url TEXT,
  like_count INTEGER NOT NULL DEFAULT 0,
  comment_count INTEGER NOT NULL DEFAULT 0,
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (author_email) REFERENCES users(email) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS comments (
  id TEXT PRIMARY KEY,
  post_id TEXT NOT NULL,
  author_email TEXT NOT NULL,
  content TEXT NOT NULL,
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
  FOREIGN KEY (author_email) REFERENCES users(email) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS post_likes (
  id TEXT PRIMARY KEY,
  post_id TEXT NOT NULL,
  user_email TEXT NOT NULL,
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
  FOREIGN KEY (user_email) REFERENCES users(email) ON DELETE CASCADE,
  UNIQUE(post_id, user_email)
);
CREATE TABLE IF NOT EXISTS follows (
  id TEXT PRIMARY KEY,
  follower_email TEXT NOT NULL,
  following_email TEXT NOT NULL,
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (follower_email) REFERENCES users(email) ON DELETE CASCADE,
  FOREIGN KEY (following_email) REFERENCES users(email) ON DELETE CASCADE,
  UNIQUE(follower_email, following_email)
);
CREATE TABLE IF NOT EXISTS notifications (
  id TEXT PRIMARY KEY,
  recipient_email TEXT NOT NULL,
  actor_email TEXT NOT NULL,
  type TEXT NOT NULL,
  post_id TEXT,
  read INTEGER NOT NULL DEFAULT 0,
  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (recipient_email) REFERENCES users(email) ON DELETE CASCADE,
  FOREIGN KEY (actor_email) REFERENCES users(email) ON DELETE CASCADE,
  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE SET NULL
);
CREATE INDEX IF NOT EXISTS idx_posts_author ON posts(author_email);
CREATE INDEX IF NOT EXISTS idx_posts_created ON posts(created_at);
CREATE INDEX IF NOT EXISTS idx_comments_post ON comments(post_id);
CREATE INDEX IF NOT EXISTS idx_post_likes_post_user ON post_likes(post_id, user_email);
CREATE INDEX IF NOT EXISTS idx_follows_follower ON follows(follower_email);
CREATE INDEX IF NOT EXISTS idx_follows_following ON follows(following_email);
CREATE INDEX IF NOT EXISTS idx_notifications_recipient ON notifications(recipient_email, created_at);
CREATE UNIQUE INDEX IF NOT EXISTS idx_users_email ON users(email);