-- Memoria persistente del agente: facts (clave/valor por sujeto) + messages (historial chat).

CREATE TABLE IF NOT EXISTS facts (
    agent_id   TEXT NOT NULL,
    subject    TEXT NOT NULL,
    key        TEXT NOT NULL,
    value      TEXT NOT NULL,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (agent_id, subject, key)
);

CREATE TABLE IF NOT EXISTS messages (
    id         INTEGER PRIMARY KEY AUTOINCREMENT,
    agent_id   TEXT NOT NULL,
    room_id    TEXT NOT NULL,
    role       TEXT NOT NULL,
    content    TEXT NOT NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_messages_room ON messages(agent_id, room_id, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_facts_subject ON facts(agent_id, subject);