------create dev schema and api user-----------------------------------------------------------------------------------------------------------------

DROP SCHEMA IF EXISTS tps CASCADE;
DROP SCHEMA IF EXISTS tpsv CASCADE;

CREATE SCHEMA tps;
COMMENT ON SCHEMA tps IS 'third party source data';

CREATE SCHEMA tpsv;
COMMENT ON SCHEMA tps IS 'third party source views';

DROP USER IF EXISTS api;

CREATE ROLE api WITH
	LOGIN
	NOSUPERUSER
	NOCREATEDB
	NOCREATEROLE
	INHERIT
	NOREPLICATION
	CONNECTION LIMIT -1
	ENCRYPTED PASSWORD 'md56da13b696f737097e0146e47cc0d0985';

-----need to setup all database objects and then grant priveledges to api----------------------------------------------------------------------------

--grant schema USAGE
GRANT USAGE ON SCHEMA tps TO api;

--grant current table privledges
GRANT SELECT, UPDATE, INSERT, DELETE ON ALL TABLES IN SCHEMA tps TO api;
GRANT SELECT, UPDATE, INSERT, DELETE ON ALL TABLES IN SCHEMA tpsv TO api;

--grant current sequence privledges
GRANT USAGE ON ALL SEQUENCES IN SCHEMA tps TO api;
GRANT USAGE ON ALL SEQUENCES IN SCHEMA tpsv TO api;

--grant future table privledges
ALTER DEFAULT PRIVILEGES IN SCHEMA tps GRANT SELECT, UPDATE, INSERT, DELETE ON TABLES TO api;
ALTER DEFAULT PRIVILEGES IN SCHEMA tpsv GRANT SELECT, UPDATE, INSERT, DELETE ON TABLES TO api;

--grant future sequence privledges
ALTER DEFAULT PRIVILEGES IN SCHEMA tps GRANT USAGE ON SEQUENCES TO api;
ALTER DEFAULT PRIVILEGES IN SCHEMA tpsv GRANT USAGE ON SEQUENCES TO api;


-----create tables-----------------------------------------------------------------------------------------------------------------------------------

-----regex map instructions table

CREATE TABLE tps.map_rm (
    srce text NOT NULL,
    target text NOT NULL,
    regex jsonb,
    seq integer NOT NULL
);
COMMENT ON TABLE tps.map_rm IS 'regex map instructions';

-----return value table

CREATE TABLE tps.map_rv (
    srce text NOT NULL,
    target text NOT NULL,
    retval jsonb NOT NULL,
    map jsonb
);
COMMENT ON TABLE tps.map_rv IS 'return value lookup table';

-----source definition table

CREATE TABLE tps.srce (
    srce text NOT NULL,
    defn jsonb,
    hist jsonb
);
COMMENT ON TABLE tps.srce IS 'source master listing and definition';

-----source data table

CREATE TABLE tps.trans (
    id integer NOT NULL,
    srce text,
    rec jsonb,
    parse jsonb,
    map jsonb,
    allj jsonb,
    ic jsonb
);
COMMENT ON TABLE tps.trans IS 'source records';
COMMENT ON COLUMN tps.trans.ic IS 'input constraint value';
ALTER TABLE tps.trans ALTER COLUMN id ADD GENERATED BY DEFAULT AS IDENTITY (
    SEQUENCE NAME tps.trans_id_seq
    START WITH 1
    INCREMENT BY 1
    NO MINVALUE
    NO MAXVALUE
    CACHE 1
);

-----import log table

CREATE TABLE tps.trans_log (
    id integer NOT NULL,
    info jsonb
);
COMMENT ON TABLE tps.trans_log IS 'import event information';
ALTER TABLE tps.trans_log ALTER COLUMN id ADD GENERATED BY DEFAULT AS IDENTITY (
    SEQUENCE NAME tps.trans_log_id_seq
    START WITH 1
    INCREMENT BY 1
    NO MINVALUE
    NO MAXVALUE
    CACHE 1
);


-------------primary keys----------------------------------------------------------------------------------------------------------------------------

ALTER TABLE ONLY tps.map_rm
    ADD CONSTRAINT map_rm_pk PRIMARY KEY (srce, target);

ALTER TABLE ONLY tps.map_rv
    ADD CONSTRAINT map_rv_pk PRIMARY KEY (srce, target, retval);

ALTER TABLE ONLY tps.srce
    ADD CONSTRAINT srce_pkey PRIMARY KEY (srce);

ALTER TABLE ONLY tps.trans_log
    ADD CONSTRAINT trans_log_pkey PRIMARY KEY (id);

ALTER TABLE ONLY tps.trans
    ADD CONSTRAINT trans_pkey PRIMARY KEY (id);

-------------indexes---------------------------------------------------------------------------------------------------------------------------------

CREATE INDEX trans_allj ON tps.trans USING gin (allj);

CREATE INDEX trans_rec ON tps.trans USING gin (rec);

CREATE INDEX trans_srce ON tps.trans USING btree (srce);

-------------foreign keys----------------------------------------------------------------------------------------------------------------------------

ALTER TABLE ONLY tps.map_rm
    ADD CONSTRAINT map_rm_fk_srce FOREIGN KEY (srce) REFERENCES tps.srce(srce);

ALTER TABLE ONLY tps.map_rv
    ADD CONSTRAINT map_rv_fk_rm FOREIGN KEY (srce, target) REFERENCES tps.map_rm(srce, target);

ALTER TABLE ONLY tps.trans
    ADD CONSTRAINT trans_srce_fkey FOREIGN KEY (srce) REFERENCES tps.srce(srce);

-------------create functions------------------------------------------------------------------------------------------------------------------------

-----set source
CREATE FUNCTION tps.srce_set(_defn jsonb) RETURNS jsonb
AS
$f$
DECLARE 
    _message jsonb;
    _MESSAGE_TEXT text;
    _PG_EXCEPTION_DETAIL text;
    _PG_EXCEPTION_HINT text;
BEGIN
    INSERT INTO
        tps.srce (srce, defn, hist)
    SELECT
        --extract name from defintion
        _defn->>'name'
        --add current timestamp to defintions
        ,_defn
        --add definition
        ,jsonb_build_object(
                'hist_defn',_defn
                ,'effective',jsonb_build_array(CURRENT_TIMESTAMP,null::timestamptz)
        ) || '[]'::jsonb
    ON CONFLICT ON CONSTRAINT srce_pkey DO UPDATE
        SET
            defn = _defn
            ,hist = 
                    --the new definition going to position -0-
                    jsonb_build_object(
                        'hist_defn',_defn
                        ,'effective',jsonb_build_array(CURRENT_TIMESTAMP,null::timestamptz)
                    ) 
                    --the previous definition, set upper bound of effective range which was previously null
                    || jsonb_set(
                        srce.hist
                        ,'{0,effective,1}'::text[]
                        ,to_jsonb(CURRENT_TIMESTAMP)
                    );
    
    _message:= 
        (
            $$
                {
                "status":"complete",
                "message":"source set"
                }
            $$::jsonb
        );
    RETURN _message;

    EXCEPTION WHEN OTHERS THEN
        GET STACKED DIAGNOSTICS 
            _MESSAGE_TEXT = MESSAGE_TEXT,
            _PG_EXCEPTION_DETAIL = PG_EXCEPTION_DETAIL,
            _PG_EXCEPTION_HINT = PG_EXCEPTION_HINT;
        _message:= 
        ($$
            {
                "status":"fail",
                "message":"error importing data"
            }
        $$::jsonb)
        ||jsonb_build_object('message_text',_MESSAGE_TEXT)
        ||jsonb_build_object('pg_exception_detail',_PG_EXCEPTION_DETAIL);
    RETURN _message;
END;
$f$
LANGUAGE plpgsql;

-----generate sql to create select based on schema
CREATE FUNCTION tps.build_srce_view_sql(_srce text, _schema text) RETURNS TEXT
AS
$f$
DECLARE	
	--_schema text;
	_path text[];
	--_srce text;
	_sql text;
BEGIN
    --_schema:= 'default';
	_path:= ARRAY['schemas',_schema]::text[];
	--_srce:= 'dcard';
SELECT
	'CREATE VIEW tpsv.'||_srce||'_'||_path[2]||' AS SELECT '||string_agg('(rec#>>'''||r.PATH::text||''')::'||r.type||' AS "'||r.column_name||'"',', ')||' FROM tps.trans WHERE srce = '''||_srce||''''
INTO	
	_sql
FROM
	tps.srce
	JOIN LATERAL jsonb_array_elements(defn#>_path) ae(v) ON TRUE
	JOIN LATERAL jsonb_to_record (ae.v) AS r(PATH text[], "type" text, column_name text) ON TRUE 
WHERE
	srce = _srce
GROUP BY
	srce.srce;

RETURN _sql;
RAISE NOTICE '%',_sql;

END
$f$
LANGUAGE plpgsql;