PRAGMA foreign_keys = ON;

CREATE TABLE IF NOT EXISTS sources (
  id INTEGER PRIMARY KEY,
  url TEXT UNIQUE,
  title TEXT,
  publisher TEXT,
  date_published TEXT,
  content TEXT
);

CREATE TABLE IF NOT EXISTS summaries (
  id INTEGER PRIMARY KEY,
  source_id INTEGER REFERENCES sources(id) ON DELETE SET NULL,
  title TEXT NOT NULL,
  summary TEXT NOT NULL,
  newsletter_date TEXT,
  tone_version TEXT,
  created_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS tags (
  id INTEGER PRIMARY KEY,
  name TEXT UNIQUE
);
CREATE TABLE IF NOT EXISTS source_tags (
  source_id INTEGER REFERENCES sources(id) ON DELETE CASCADE,
  tag_id INTEGER REFERENCES tags(id) ON DELETE CASCADE,
  PRIMARY KEY(source_id, tag_id)
);

CREATE TABLE IF NOT EXISTS embeddings (
  id INTEGER PRIMARY KEY,
  ref_table TEXT NOT NULL CHECK(ref_table IN ('sources','summaries')),
  ref_id INTEGER NOT NULL,
  model TEXT NOT NULL,
  dim INTEGER NOT NULL,
  vec BLOB NOT NULL,
  UNIQUE(ref_table, ref_id, model)
);

CREATE VIRTUAL TABLE IF NOT EXISTS sources_fts USING fts5(
  title, content, content='sources', content_rowid='id'
);
CREATE VIRTUAL TABLE IF NOT EXISTS summaries_fts USING fts5(
  title, summary, content='summaries', content_rowid='id'
);

CREATE TRIGGER IF NOT EXISTS sources_ai AFTER INSERT ON sources BEGIN
  INSERT INTO sources_fts(rowid, title, content) VALUES (new.id, new.title, new.content);
END;
CREATE TRIGGER IF NOT EXISTS sources_au AFTER UPDATE ON sources BEGIN
  INSERT INTO sources_fts(sources_fts, rowid, title, content)
    VALUES('delete', old.id, old.title, old.content);
  INSERT INTO sources_fts(rowid, title, content) VALUES (new.id, new.title, new.content);
END;
CREATE TRIGGER IF NOT EXISTS sources_ad AFTER DELETE ON sources BEGIN
  INSERT INTO sources_fts(sources_fts, rowid, title, content) VALUES('delete', old.id, old.title, old.content);
END;

CREATE TRIGGER IF NOT EXISTS summaries_ai AFTER INSERT ON summaries BEGIN
  INSERT INTO summaries_fts(rowid, title, summary) VALUES (new.id, new.title, new.summary);
END;
CREATE TRIGGER IF NOT EXISTS summaries_au AFTER UPDATE ON summaries BEGIN
  INSERT INTO summaries_fts(summaries_fts, rowid, title, summary)
    VALUES('delete', old.id, old.title, old.summary);
  INSERT INTO summaries_fts(rowid, title, summary) VALUES (new.id, new.title, new.summary);
END;
CREATE TRIGGER IF NOT EXISTS summaries_ad AFTER DELETE ON summaries BEGIN
  INSERT INTO summaries_fts(summaries_fts, rowid, title, summary) VALUES('delete', old.id, old.title, old.summary);
END;