-- Mart: Deprivation index — one row per URN
-- Joins school postcode → LSOA → IDACI score

with school_postcodes as (
    select
        urn,
        postcode
    from {{ ref('stg_gias_establishments') }}
    where status = 'Open'
      and postcode is not null
)

-- Note: The join between postcode and LSOA requires a postcode-to-LSOA
-- lookup table. This will be populated by the geocode script or a seed.
-- For now, this model serves as a placeholder that will be completed
-- once the IDACI tap provides the postcode→LSOA mapping.

select
    i.lsoa_code,
    i.idaci_score,
    i.idaci_decile
from {{ ref('stg_idaci') }} i