data-dwh-dbt-project/models/reporting/xero/xero__net_fees_by_deal.sql

{% set relevant_document_statuses = "('PAID', 'AUTHORISED')" %}

with
    xero__invoices as (select * from {{ ref("xero__invoices") }}),
    xero__credit_notes as (select * from {{ ref("xero__credit_notes") }}),
    xero__contacts as (select * from {{ ref("xero__contacts") }}),
    fees_invoiced as (
        select
            cast(
                date_trunc('month', i.invoice_issued_date_utc) as date
            ) as invoice_issued_year_month,
            c.id_deal,
            sum(i.total_amount_wo_tax_in_gbp) as fees_invoiced
        from xero__invoices i
        left join xero__contacts c on i.id_contact = c.id_contact
        where i.invoice_status in {{ relevant_document_statuses }}
        group by date_trunc('month', i.invoice_issued_date_utc), c.id_deal
    ),
    fees_credited as (
        select
            cast(
                date_trunc('month', cn.credit_note_issued_at_utc) as date
            ) as credit_note_issued_year_month,
            c.id_deal,
            sum(cn.subtotal_in_gbp) as fees_credited
        from xero__credit_notes cn
        left join xero__contacts c on cn.id_contact = c.id_contact
        where cn.credit_note_status in {{ relevant_document_statuses }}
        group by date_trunc('month', cn.credit_note_issued_at_utc), c.id_deal
    )
select
    coalesce(
        i.invoice_issued_year_month, c.credit_note_issued_year_month
    ) as issued_year_month,
    coalesce(i.id_deal, c.id_deal) as id_deal,
    coalesce(i.fees_invoiced, 0) as fees_invoiced_in_gbp,
    coalesce(c.fees_credited, 0) as fees_credited_in_gbp,
    (coalesce(i.fees_invoiced, 0) - coalesce(c.fees_credited, 0)) as net_fees_in_gbp
from fees_invoiced i
full outer join
    fees_credited c
    on i.invoice_issued_year_month = c.credit_note_issued_year_month
    and i.id_deal = c.id_deal