--\timing
--explain (analyze, buffers)
WITH 
mseq AS (
    SELECT * FROM 
    (
        VALUES
        ('Jun',1)
        ,('Jul',2)
        ,('Aug',3)
        ,('Sep',4)
        ,('Oct',5)
        ,('Nov',6)
        ,('Dec',7)
        ,('Jan',8)
        ,('Feb',9)
        ,('Mar',10)
        ,('Apr',11)
        ,('May',12)

    ) x(m,s)
)
--select * from mseq
,base AS (
SELECT
    order_season
    ,order_month
    ,version
    ,iter
    ,part_descr
    ,bill_cust_descr
    ,ship_cust_descr
    ,SUM(units) units
    ,SUM(value_usd) value_usd
FROM
    rlarp.osm_fcpool
WHERE
    where_clause
GROUP BY
    order_season
    ,order_month
    ,version
    ,iter
    ,part_descr
    ,bill_cust_descr
    ,ship_cust_descr
)
,months AS (
    SELECT
        order_season
        ,version
        ,iter
        ,order_month
        ,mseq.s seq
        ,sum(units) units
        ,sum(value_usd) value_usd
    FROM
        base
        INNER JOIN mseq ON
            mseq.m = base.order_month
    GROUP BY
        order_season
        ,version
        ,iter
        ,order_month
        ,s
)
,mpvt AS (
    SELECT
        order_month
        ,seq
        ,SUM(units) FILTER (WHERE order_season = 2019) "2019 qty"
        ,SUM(units) FILTER (WHERE order_season = 2020 AND iter IN ('copy','short ship','bad_ship')) "2020 base qty"
        ,SUM(units) FILTER (WHERE order_season = 2020 AND iter NOT IN ('copy','short ship','bad_ship')) "2020 adj qty"
        ,SUM(units) FILTER (WHERE order_season = 2020) "2020 tot qty"
        ,SUM(value_usd) FILTER (WHERE order_season = 2019) "2019 value_usd"
        ,SUM(value_usd) FILTER (WHERE order_season = 2020 AND iter IN ('copy','short ship','bad_ship')) "2020 base value_usd"
        ,SUM(value_usd) FILTER (WHERE order_season = 2020 AND iter NOT IN ('copy','short ship','bad_ship')) "2020 adj value_usd"
        ,SUM(value_usd) FILTER (WHERE order_season = 2020) "2020 tot value_usd"
    FROM
        months
    GROUP BY
        order_month
        ,seq
    ORDER BY
        seq ASC
)
,mlist AS (
    SELECT
        mseq.m order_month
        ,"2019 qty"
        ,"2020 base qty"
        ,"2020 adj qty"
        ,"2020 tot qty"
        ,"2019 value_usd"
        ,"2020 base value_usd"
        ,"2020 adj value_usd"
        ,"2020 tot value_usd"
    FROM
        mseq
        LEFT OUTER JOIN mpvt ON
            mpvt.order_month = mseq.m
    ORDER BY
        mseq.s ASC
)
,totals AS (
    SELECT
        order_season
        ,version
        ,iter
        ,sum(units) units
        ,sum(value_usd) value_usd
    FROM
        months
    GROUP BY
        order_season
        ,version
        ,iter
)
SELECT 
    jsonb_build_object(
        'months'
        ,(SELECT jsonb_agg(row_to_json(months)::jsonb) FROM months)
        ,'mpvt'
        ,(SELECT jsonb_agg(row_to_json(mlist)::jsonb) FROM mlist)
        ,'base'
        ,(SELECT jsonb_agg(row_to_json(base)::jsonb) FROM base)
        ,'totals'
        ,(SELECT jsonb_agg(row_to_json(totals)::jsonb) FROM totals)
    ) package