/*
  Zone setup for DNS-01 ACME challenge

  This code executed once per domain.
  Future changes makes traefik via PowerDNS API
*/

-- This var must be set in psql args
SET vars.domain TO :'ACME_DOMAIN';

DO $_$
DECLARE
  v_domain    text := 'acme-' || current_setting('vars.domain'); -- domain name
  v_ns        text := 'ns.'   || current_setting('vars.domain'); -- master DNS host
  v_ns_admin  text := 'admin.'|| current_setting('vars.domain'); -- master DNS admin email

  v_refresh   int  :=  10800;
  v_retry     int  :=   3600;
  v_expire    int  := 604800;
  v_ttl       int  :=   1800;

  v_domain_id integer;  -- internal domain id
  v_stamp     text;     -- zone timestamp
  v_stamp_old text;     -- previous zone SOA timestamp
  v_soa       text;     -- zone SOA

BEGIN

  IF v_domain = 'acme-' THEN
    RAISE NOTICE 'ACME_DOMAIN is not set. Skipping acme zone setup';
    RETURN;
  END IF;

  RAISE NOTICE 'Setup acme zone % for nameserver %',v_domain,v_ns;

  SELECT INTO v_domain_id id FROM domains WHERE name = v_domain;
  IF FOUND THEN
    -- no any changes needed after creation
    RAISE NOTICE 'Zone already exists. Skipping';
    RETURN;
  END IF;

  INSERT INTO domains (name, type) VALUES
    (v_domain, 'NATIVE')
    RETURNING id INTO v_domain_id
  ;

  INSERT INTO domainmetadata(domain_id, kind, content) VALUES
    (v_domain_id, 'SOA-EDIT-API', 'INCREASE')
  ;

  v_stamp := soa_upd();
  v_soa := concat_ws(' ', v_ns, v_ns_admin, v_stamp, v_refresh, v_retry, v_expire, v_ttl);

  INSERT INTO records (domain_id, name, ttl, type, prio, content) VALUES 
    (v_domain_id, v_domain, 60,  'SOA', 0, v_soa)
  , (v_domain_id, v_domain, 1800, 'NS', 0, v_ns)
  ;
END;
$_$;