-- 1. เพิ่ม columns ใน documents table
alter table documents
  add column if not exists doc_number text,
  add column if not exists workflow_steps jsonb default '[]'::jsonb,
  add column if not exists workflow_template_id uuid,
  add column if not exists current_step int default 0,
  add column if not exists sla_due timestamptz,
  add column if not exists priority text default 'ปกติ',
  add column if not exists approval_mode text,
  add column if not exists approvers_json text;

-- 2. สร้าง app_settings table (เก็บ EmailJS config)
create table if not exists app_settings (
  key text primary key,
  value jsonb,
  updated_at timestamptz default now()
);

-- 3. สร้าง approval_tokens table (สำหรับลิงก์อนุมัติ)
create table if not exists approval_tokens (
  token uuid primary key default gen_random_uuid(),
  approval_id uuid, document_id uuid,
  approver_email text, approver_name text,
  used boolean default false,
  expires_at timestamptz,
  step_order int default 0,
  approval_mode text, total_steps int,
  creator_email text, email_config jsonb,
  created_at timestamptz default now()
);

alter table documents add column if not exists doc_number text, add column if not exists workflow_steps jsonb default '[]'::jsonb, add column if not exists workflow_template_id uuid, add column if not exists current_step int default 0, add column if not exists sla_due timestamptz, add column if not exists priority text default 'ปกติ', add column if not exists approval_mode text, add column if not exists approvers_json text; create table if not exists app_settings (key text primary key, value jsonb, updated_at timestamptz default now()); create table if not exists approval_tokens (token uuid primary key default gen_random_uuid(), approval_id uuid, document_id uuid, approver_email text, approver_name text, used boolean default false, expires_at timestamptz, step_order int default 0, approval_mode text, total_steps int, creator_email text, email_config jsonb, created_at timestamptz default now());