--CREATE OR REPLACE VIEW rlarp.pcore_seq AS
--EXPLAIN (ANALYZE, BUFFERS)
---------------------------------------------------------------------------------------------------
--there are 3 UOM involved:
--1. the original package (mpckg) from the core price row
--2. the array of pckg codes (pckg) that will allow joining to the item master (hard-coded)
--3. the UOM of the volume break (vol_uom)
---------------------------------------------------------------------------------------------------
WITH 
-------------make BDL and SLV the same thing-------------------------------------------------------
-------------assumes that left column has all unique packages in rlarp.pcore-----------------------
vu AS (
    SELECT * FROM ( VALUES
    ('BDL','SLV'),
    ('BDL','BDL'),
    ('PLT','PLT'),
    ('CSE','CSE')
    ) x(bdl,uom)
)
----------------add columns for a better understanding of what is otherwise implied----------------
,pc AS materialized (
    SELECT
         plist
        ,STLC 
        ,COALESCE(COLTIER,'') COLTIER 
        ,coalesce(BRANDING,'' ) branding
        ,COALESCE(ACCS ,'') ACCS
        ,COALESCE(SUFF,'') SUFFIX
        ,COALESCE(pckg,'') mpckg        --retain the original price row package indicator
        ----price 1 -----------------
        ,jsonb_build_array(PCKG)||CASE WHEN pckg = 'BDL' THEN '["SLV"]' ELSE '[]' END::jsonb PCKG1
        ,1 VOLL1
        ,PCKG VOL1_UOM                  --the original package, same as mpckg
        ,PACK VOL1_PRICE
        ----price 2 -----------------
        ,jsonb_build_array(PCKG)||CASE WHEN pckg = 'BDL' THEN '["SLV"]' ELSE '[]' END::jsonb PCKG2
        ,1 VOLl2
        ,'PLT' VOL2_UOM                 --the original volume basis unit of measure (PLT = master pallet)
        ,MP VOL2_PRICE
        ----price 3 -----------------
        ,jsonb_build_array('PLT') PCKG3
        ,1 VOLL3
        ,'PLT' VOL3_UOM                 --this one is overriden to PLT to hook with bulk parts
        ,BULK VOL3_PRICE
    FROM
        rlarp.PCORE P
--    WHERE
--        stlc = 'FNP07080'
--        AND plist = 'FCAC'
)
--SELECT * FROM pc
--------------list unique colors per line-----------------------------------------------------------
,colors AS (
SELECT
     pc.plist
    ,pc.STLC 
    ,pc.COLTIER 
    ,pc.branding
    ,pc.ACCS
    ,pc.SUFFIX
    ,pc.mpckg
    ,string_agg( DISTINCT ltrim(rtrim(i.COLC)),', ') tclist
    ,jsonb_agg( DISTINCT ltrim(rtrim(i.COLC))) clist
FROM    
    pc
    LEFT OUTER JOIN "CMS.CUSLG".itemm i ON
        i.STLC = pc.stlc
        AND i.COLTIER = pc.coltier
        AND i.colc NOT IN ('MIX','')
        --relax relationship to pick up any colors that we run for the mold and color tier
        --AND COALESCE(i.BRANDING,'') = pc.branding
        --AND COALESCE(i.ACCS,'') = pc.ACCS
        --AND COALESCE(i.SUFFIX,'') = pc.suffix
        AND APLNT <> 'I'
        --exclude hangers packed in 400 by targeting `AUTO` in the desription
        AND i.descr !~ 'AUTO'
GROUP BY 
     pc.plist
    ,pc.STLC 
    ,pc.COLTIER 
    ,pc.branding
    ,pc.ACCS
    ,pc.SUFFIX
    ,pc.mpckg
)
--SELECT * FROM colors
-----------since joining to the item master will be differnt for the last bulk columm---------------
-----------must first pivot the data out then join based on the type of row-------------------------
,unpivot AS (
    SELECT  
        pc.plist
        ,pc.stlc
        ,pc.coltier
        ,pc.branding
        ,pc.accs
        ,pc.suffix
        ---meta package (the one used on the customer facing price row)----------
        ,pc.mpckg
        ,1 col
        ,pc.pckg1 pckg
        ,pc.vol1_uom vol_uom
        ,pc.voll1 vol_qty
        --,COALESCE(pc.vol1_price,0) price
        ,pc.vol1_price price
    FROM
        pc
    WHERE
        true
        --pc.vol1_price IS NOT null
    UNION
    SELECT
        pc.plist
        ,pc.stlc
        ,pc.coltier
        ,pc.branding
        ,pc.accs
        ,pc.suffix
        ---meta package (the one used on the customer facing price row)----------
        ,pc.mpckg
        ,2 col
        ,pc.pckg2 pckg
        ,pc.vol2_uom vol_uom
        ,pc.voll2 vol_qty
        --,coalesce(pc.vol2_price,0) price
        ,pc.vol2_price price
    FROM
        pc
    WHERE
        true
        --pc.vol2_price IS NOT null
    UNION
    SELECT
        pc.plist
        ,pc.stlc
        ,pc.coltier
        ,pc.branding
        ,pc.accs
        ,pc.suffix
        ---meta package (the one used on the customer facing price row)----------
        ,pc.mpckg
        ,3 col
        ,pc.pckg3 pckg
        ,pc.vol3_uom vol_uom
        ,pc.voll3 vol_qty
        --,coalesce(pc.vol3_price,0) price
        ,pc.vol3_price price
    FROM
        pc
    WHERE
        true
        --pc.vol3_price IS NOT null
)
--SELECT * FROM unpivot
--SELECT * FROM unpivot WHERE pckg ? 'SLV'
--SELECT DISTINCT pckg FROM unpivot;
-----------------link to actual part numbers, tag the sequence so a single item can be chosen---------------------
,items_init AS (
SELECT 
     up.plist
    ,up.stlc
    ,up.coltier
    ,up.branding
    ,up.accs
    ,up.suffix
    ,up.mpckg
    ,up.pckg    --item master joiner
    --retain this column to re-pivot back to original format
    ,up.col
    ,up.vol_uom
    ,up.voL_qty
    ,up.price
    ,row_number() OVER (PARTITION BY up.plist, up.stlc, up.coltier, up.branding, up.accs, up.suffix, up.pckg, up.col, up.vol_uom ORDER BY item ASC) seq
    ,item
    --subquery option is not performant at all
FROM    
    unpivot up
    ----make all the BDL units of measure BDL and also SLV with intentional duplication 
    ----becusae some defaults units on itemm have SLV and not BDL, but still need a join
    --LEFT OUTER JOIN vu ON
    --    vu.bdl = up.pckg
    LEFT OUTER JOIN "CMS.CUSLG".itemm i ON
        i.STLC = up.stlc
        AND i.COLTIER = up.coltier
        --basically the same as does the core list package match the item master package
        --the item master could have multiple since its defined per plant but will take the first item for now
        AND up.pckg ? i.uomp                 
        AND COALESCE(i.BRANDING,'') = up.branding
        AND COALESCE(i.ACCS_PS,'') = up.ACCS
        AND COALESCE(i.SUFFIX,'') = up.suffix
        AND APLNT <> 'I'
        --exclude hangers packaged in 400 for automation pruposes
        AND i.descr !~ 'AUTO'
)
--SELECT * FROM items_init
--SELECT * FROM items_init WHERE stlc = 'TRV55420' ORDER BY plist, stlc, col, seq
----compile all the conversions into a single json object----------------------
,items AS (
    SELECT
        jsonb_agg( DISTINCT 
            jsonb_build_object(
                'partn', item
                ,'fu', vol_uom
                ,'tu','PC'
            )
        ) conv
    FROM 
        items_init 
    WHERE 
        seq = 1
        AND COALESCE(item,'') <> ''
)
--do the conversion-------------------------------------------------------------
, conversion AS (
    SELECT
        rslt.* 
    FROM
        items 
        JOIN LATERAL rlarp.uom_array(conv) rslt ON true
)
----join conversion back to data initial part link------------------------------
,joinback_init AS (
SELECT 
    i.plist
    ,i.stlc
    ,i.coltier
    ,i.branding
    ,i.accs
    ,i.suffix
    ,i.mpckg
    ,i.pckg
    ,i.col
    ,i.vol_uom
    ,i.vol_qty
    ,i.price
    ,c.nm
    ,c.dm
    ,l.clist
FROM
    items_init i
    LEFT OUTER JOIN conversion c ON
        c.p = i.item
        AND c.f = i.vol_uom
    LEFT OUTER JOIN colors l ON
        l.stlc = i.stlc
        AND l.coltier = i.coltier
        AND l.branding = i.branding
        AND l.accs = i.accs
        AND l.suffix = i.suffix
        AND l.mpckg = i.mpckg
WHERE
    i.seq = 1
)
--SELECT * FROM joinback_init
----aggregate everything offered for the price point----------------------------
,agg_levels AS (
    SELECT
        plist
        ,stlc
        ,string_agg(DISTINCT coltier ,',') FILTER (WHERE clist IS NOT NULL) coltier
        ,COALESCE(string_agg(DISTINCT branding,',') FILTER (WHERE COALESCE(branding,'') <> ''),'') branding
        -------replace blank with 'none'--------------
        ,regexp_replace(string_agg(DISTINCT accs    ,','),'^,','','g') accs
        ,regexp_replace(string_agg(DISTINCT suffix  ,','),'^,','','g') suffix
        ,mpckg 
        --,pckg
        ,col
        ,vol_uom
        ,voL_qty
        --,CASE WHEN price = 0 then null::numeric ELSE max(nm) END nm
        ,max(nm) nm
        --,CASE WHEN price = 0 then null::numeric ELSE max(dm) END dm
        ,max(dm) dm
        ,price
        -----convert json array to a plain text representation as well as remove nulls------
        ,regexp_replace(jsonb_arr_aggcd(clist)::text,'["\[\]]|null, ','','g') clist
    FROM
        joinback_init
    GROUP BY
        plist
        ,stlc
        ,mpckg 
        --,pckg
        ,col
        ,vol_uom
        ,vol_qty
        ,price
)
--SELECT * FROM agg_levels order by stlc , coltier , branding ,accs , suffix, mpckg 
,seq_levels AS (
    SELECT 
        plist||'.'||stlc||'.'||mpckg||'.'||col||'.'||to_char(row_number() OVER (PARTITION BY plist, stlc, mpckg, col ORDER BY price ASC),'FM00') lookup
        ,plist
        ,stlc
        ,coltier
        ,branding
        ,accs
        ,suffix
        ,mpckg pckg
        ,clist
        ,col
        ,vol_uom
        ,vol_qty
        ,nm
        ,dm
        ,price
        ,CASE WHEN COALESCE(price,0) = 0 THEN '' ELSE plist||'.'||stlc||'.'||mpckg||'.'||to_char(row_number() OVER (PARTITION BY plist, stlc, mpckg, col ORDER BY price ASC),'FM00') END descr_lookup
    FROM 
        agg_levels
)
SELECT * FROM seq_levels WHERE nm is not null
--ORDER BY stlc , coltier , branding ,accs , suffix, pckg