-- User devices table
CREATE TABLE user_devices (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    device_id VARCHAR(255) NOT NULL,
    device_name VARCHAR(255),
    device_type VARCHAR(50) CHECK (device_type IN ('mobile', 'tablet', 'desktop')),
    platform VARCHAR(50) CHECK (platform IN ('android', 'ios', 'web')),
    fcm_token VARCHAR(512),
    app_version VARCHAR(50),
    os_version VARCHAR(50),
    ip_address VARCHAR(45),
    last_active_at TIMESTAMP WITH TIME ZONE,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Indexes
CREATE INDEX idx_user_devices_user_id ON user_devices(user_id);
CREATE INDEX idx_user_devices_device_id ON user_devices(device_id);
CREATE INDEX idx_user_devices_fcm_token ON user_devices(fcm_token);
CREATE UNIQUE INDEX idx_user_devices_user_device ON user_devices(user_id, device_id);