-- Migration: Add agency user roles and collaborator tracking
-- Purpose: Support owner/collaborator hierarchy for agency users

-- 1. Add agency_role column to users table (owner or collaborator)
ALTER TABLE users ADD COLUMN IF NOT EXISTS agency_role VARCHAR(50) DEFAULT 'owner' CHECK (agency_role IN ('owner', 'collaborator'));

-- 2. Add created_by column to track which user created this collaborator
ALTER TABLE users ADD COLUMN IF NOT EXISTS created_by UUID REFERENCES users(id) ON DELETE SET NULL;

-- 3. Update existing ADMIN_AGENCIA users to have 'owner' agency_role
UPDATE users SET agency_role = 'owner' WHERE role = 'ADMIN_AGENCIA' AND agency_role IS NULL;

-- 4. Add collaborator_created_at to track when the collaborator was added
ALTER TABLE users ADD COLUMN IF NOT EXISTS collaborator_created_at TIMESTAMP WITH TIME ZONE;

-- 5. Create index for faster queries
CREATE INDEX IF NOT EXISTS idx_users_agency_role ON users(tenant_id, agency_role);
CREATE INDEX IF NOT EXISTS idx_users_created_by ON users(created_by);
