CREATE TABLE IF NOT EXISTS filings (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    accession_number TEXT UNIQUE,
    ticker TEXT,
    cik TEXT,
    insider_name TEXT,
    role TEXT,
    transaction_date TEXT,
    filed_date TEXT,
    shares REAL,
    price REAL,
    total_value REAL,
    flag TEXT,
    is_10b51 INTEGER DEFAULT 0,
    post_tx_shares REAL,
    created_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS signals (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    ticker TEXT,
    trigger_date TEXT,
    cluster_size INTEGER,
    total_cluster_value REAL,
    score REAL,
    alerted INTEGER DEFAULT 0,
    executed INTEGER DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_filings_ticker ON filings(ticker);
CREATE INDEX IF NOT EXISTS idx_filings_transaction_date ON filings(transaction_date);
CREATE INDEX IF NOT EXISTS idx_signals_ticker ON signals(ticker);
CREATE INDEX IF NOT EXISTS idx_signals_alerted ON signals(alerted);