-- Migration 088: User presence (online/away/offline, last_seen)
-- v0.301 Lot P1

CREATE TABLE IF NOT EXISTS user_presence (
    user_id UUID PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(20) NOT NULL DEFAULT 'offline' CHECK (status IN ('online', 'away', 'busy', 'offline')),
    last_seen_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    status_message TEXT,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_user_presence_status ON user_presence(status);
CREATE INDEX IF NOT EXISTS idx_user_presence_last_seen ON user_presence(last_seen_at DESC);