-- ============================================================================
--  VAT Summary  (Kontrolle Umsatzsteuer-Voranmeldung)
--  Odoo 17 / PostgreSQL
--
--  Modell : brandize.datacenter.amazon.vat.transaction
--  Tabelle: brandize_datacenter_amazon_vat_transaction
--
--  Rechnungsdatum von / bis : 01.09.2026 / 30.09.2026
--
--  Parameter:
--      %(month)s   Abrechnungszeitraum als Text, z. B. '2026-SEP'
--
--  Aufruf (Odoo / psycopg2):
--      cr.execute(open('VAT_Summary.sql').read(), {'month': '2026-SEP'})
--
--  In psql:
--      \set month '2026-SEP'
--      ... WHERE activity_period = :'month'
--
--  Excel-Namen -> SQL-Spalten:
--      QUANTITY             -> qty
--      GROSS_INVOICE_AMOUNT -> total_activity_value_amt_vat_incl
--      TOTAL_VAT            -> total_activity_value_vat_amt
--      IN_PERIOD            -> activity_period = %(month)s
--      SALES_CHANNEL        -> sales_channel   (<> 'AMAZON_FEE')
--      SALE_ARRIVAL_COUNTRY -> sale_arrival_country
--      SALE_DEPART_COUNTRY  -> sale_depart_country
--      BUYER_VAT_NR_COUNTRY -> buyer_vat_number_country
--      ZERO_HAS_B2B_VAT_NR  -> buyer_vat_number <> ''
--
--  Hinweis: Die "bereinigten" Hilfsspalten (CU-CX) sind nur ein Excel-Workaround
--  fuer als Text/Datum importierte Zellen. In der DB sind die numerischen
--  Spalten bereits korrekt typisiert, daher werden hier die Rohspalten genutzt.
-- ============================================================================

WITH base AS (
    SELECT
        sale_arrival_country,
        sale_depart_country,
        buyer_vat_number_country,
        buyer_vat_number,
        qty,
        total_activity_value_amt_vat_incl AS gross,
        total_activity_value_vat_amt      AS vat
    FROM brandize_datacenter_amazon_vat_transaction
    WHERE activity_period = %(month)s
      AND sales_channel <> 'AMAZON_FEE'
),
arrival AS (
    SELECT
        sale_arrival_country AS country_code,
        SUM(qty)   AS quantity,
        SUM(gross) AS gross_total,
        -- Non-OSS: Abgangs- und Ankunftsland identisch (Inlandslieferung)
        SUM(gross) FILTER (WHERE sale_depart_country = sale_arrival_country) AS gross_non_oss,
        SUM(vat)   FILTER (WHERE sale_depart_country = sale_arrival_country) AS vat_non_oss,
        -- Excl. B2B: nur Umsaetze mit USt (TOTAL_VAT <> 0)
        SUM(gross) FILTER (WHERE vat <> 0) AS gross_excl_b2b
    FROM base
    WHERE sale_arrival_country IS NOT NULL
      AND sale_arrival_country <> ''
    GROUP BY sale_arrival_country
),
intra AS (
    -- Innergemeinschaftliche Lieferung: B2B mit USt-Nr. und 0 %% USt
    SELECT
        buyer_vat_number_country AS country_code,
        SUM(gross) AS intra_net
    FROM base
    WHERE buyer_vat_number_country IS NOT NULL
      AND buyer_vat_number_country <> ''
      AND buyer_vat_number IS NOT NULL
      AND buyer_vat_number <> ''
      AND vat = 0
    GROUP BY buyer_vat_number_country
)
SELECT
    a.country_code AS "Country Code",
    COALESCE(c.name->>'de_DE', c.name->>'en_US', a.country_code) AS "Land",
    to_char(a.quantity, 'FM999,999,999') AS "Quantity",
    translate(to_char(a.gross_total,    'FM999,999,999,999.99'), ',.', '.,') || ' €' AS "Gross Sales (Total)",
    translate(to_char(a.gross_non_oss,  'FM999,999,999,999.99'), ',.', '.,') || ' €' AS "Gross Sales (Non-OSS)",
    translate(to_char(a.vat_non_oss,    'FM999,999,999,999.99'), ',.', '.,') || ' €' AS "VAT to Remit (Non-OSS)",
    translate(to_char(a.gross_excl_b2b, 'FM999,999,999,999.99'), ',.', '.,') || ' €' AS "Gross Sales (Excl. B2B)",
    translate(to_char(COALESCE(i.intra_net, 0), 'FM999,999,999,999.99'), ',.', '.,') || ' €'
        AS "Intra-community supply – Net sales"
FROM arrival a
LEFT JOIN intra       i ON i.country_code = a.country_code
LEFT JOIN res_country c ON c.code         = a.country_code
ORDER BY a.country_code;

-- ----------------------------------------------------------------------------
--  Import-Kontrolle (entspricht der LET-Pruefung im Sheet):
--  zaehlt Datensaetze, deren Betragsspalten nicht als Zahl vorliegen.
--
--  SELECT count(*) AS nicht_numerische_zellen
--    FROM brandize_datacenter_amazon_vat_transaction
--   WHERE activity_period = %(month)s
--     AND (total_activity_value_amt_vat_incl IS NULL
--          OR total_activity_value_vat_amt IS NULL);
--
--  Hinweis: Die Zeilenreihenfolge im Sheet ist die Erstauftretens-Reihenfolge
--  (UNIQUE(FILTER(...))). Falls gewuenscht, statt "ORDER BY a.country_code"
--  ein "MIN(id) AS first_seen" in der arrival-CTE ergaenzen und danach sortieren.
-- ----------------------------------------------------------------------------