create database cem_monitoring;
create extension timescaledb;



create table application_t (
    id serial not null primary key,
    app_id VARCHAR(32) NOT NULL UNIQUE,
    label varchar(128) not null unique
);

create table variable_t (
    id serial not null primary key,
    app integer references application_t(id),
    converter_id varchar(16) not null,
    device_id varchar(16) not null,
    variable_id varchar(16) not null,
    label varchar(128) not null unique,
    unit varchar(16),
    quantity varchar(32),
    unique (app, converter_id, device_id, variable_id)
);

create table measurement_t (
    time timestamptz not null,
    variable integer references variable_t (id),
    value float
);

select create_hypertable('measurement_t', 'time');

insert into application_t (app_id, label) values('ku226', 'Kupferdreher Str. 226, Essen');
insert into variable_t (app, converter_id, device_id, variable_id, label, unit, quantity)
	values ((select id from application_t where app_id = 'ku226'), '1', 'bhkw', 'u', 'BHKW Spannung', 'V', 'voltage'),
	       ((select id from application_t where app_id = 'ku226'), '1', 'bhkw', 'p', 'BHKW Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'bhkw', 'import', 'BHKW Energie Export', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'bhkw', 'export', 'BHKW Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'pv', 'u', 'PV Spannung', 'V', 'voltage'),
               ((select id from application_t where app_id = 'ku226'), '1', 'pv', 'p', 'PV Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'pv', 'import', 'PV Energie Export', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'pv', 'export', 'PV Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '3', 'mains', 'import', 'Netz Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '3', 'mains', 'p', 'Netz Leistung', 'W', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w1', 'p', 'Wohnung 1 Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w1', 'import', 'Wohnung 1 Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w2', 'p', 'Wohnung 2 Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w2', 'import', 'Wohnung 2 Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w3', 'p', 'Wohnung 3 Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w3', 'import', 'Wohnung 3 Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w4', 'p', 'Wohnung 4 Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w4', 'import', 'Wohnung 4 Energie Import', 'Wh', 'energy'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w5', 'p', 'Wohnung 5 Leistung', 'kW', 'power'),
               ((select id from application_t where app_id = 'ku226'), '1', 'w5', 'import', 'Wohnung 5 Energie Import', 'Wh', 'energy')
	;




-- create user preprocessor password 'geheim';
grant select on application_t to preprocessor;
grant select on variable_t to preprocessor;
grant insert on measurement_t to preprocessor;
grant select on measurement_t to grafana;


create view measurement_v as
  select m.time as time, 
         m.value as value, 
	 v.quantity as quantity, 
	 v.unit as unit, 
	 v.label as variable, 
	 a.label as application 
    from measurement_t m, 
         application_t a, 
	 variable_t v 
    where m.variable = v.id and 
          v.app = a.id;

grant select on measurement_v to grafana;