-- Migration: 002_create_sessions
-- Description: Create the sessions table for stateful authentication

CREATE TABLE IF NOT EXISTS sessions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token VARCHAR(64) NOT NULL UNIQUE,
    expires_at TIMESTAMPTZ NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    user_agent TEXT,
    ip_address VARCHAR(45)
);

-- Index for token lookup (authentication)
CREATE INDEX IF NOT EXISTS idx_sessions_token ON sessions(token);

-- Index for user_id (session cleanup)
CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions(user_id);

-- Index for expiration cleanup
CREATE INDEX IF NOT EXISTS idx_sessions_expires_at ON sessions(expires_at);