-- Migration 012: Add cage_uuid to kandangs table
-- Add cage_uuid field for external scales API integration

-- Add cage_uuid column (nullable, unique)
ALTER TABLE kandangs
ADD COLUMN IF NOT EXISTS cage_uuid VARCHAR(36) UNIQUE;

-- Add comment explaining the field
COMMENT ON COLUMN kandangs.cage_uuid IS 'External cage UUID for scales API (dashboard.cpsp.id/api/scales/cage/)';

-- Seed initial data for existing kandangs
-- Kandang Atas gets the existing hardcoded UUID
UPDATE kandangs
SET cage_uuid = '9f556d2a-af5c-41b0-bcd0-6cea0dfa0fed'
WHERE LOWER(name) LIKE '%atas%';

-- Kandang Bawah and others remain null (to be configured via settings UI)
-- This is intentional - admins will configure via IoT Panel settings