{{
  config(
    materialized='table'
  )
}}

with recursive 
latest_departments as (
    select *
    from (
        select *,
               row_number() over (partition by id order by _sdc_received_at desc) as rn
        from {{ source('tap_spreadsheets_anywhere', 'departments') }}
    ) t
    where rn = 1
    and id not in ('CAD', 'CSAD')
),
department_tree as (
    -- Anchor: top-level department (parent_id is set to Sarens Group in the Excel)
    select
        id as department_hris_id,
        applicable_organization as name,
        null::text as manager_id,
        id::ltree as path, -- start path with own ID
		NULL::VARCHAR AS org_view_model
    from latest_departments
    where parent_id = 'Sarens Group'

    union all

    -- Recursive part: join child departments
    select
        d.id as department_hris_id,
        d.applicable_organization as name,
        null::text as manager_id,
        dt.path || d.id::text::ltree as path,
		NULL::VARCHAR AS org_view_model
    from latest_departments d
    join department_tree dt
      on d.parent_id = dt.department_hris_id
)

select * from department_tree