//
//   Copyright 2022  SenX S.A.S.
//
//   This program is free software: you can redistribute it and/or modify it
//   under the terms of the GNU Affero General Public License as published
//   by the Free Software Foundation, version 3.
//
//   This program is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty
//   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//   See the GNU Affero General Public License for more details.
//
//   You should have received a copy of the GNU Affero General Public License
//   along with this program. If not, see <https://www.gnu.org/licenses/>
//

{
    'desc' 'Returns up to max_n discordant patterns'
    'sig' [ 
      [ [ 'profile:GTS' 'max_n:LONG' 'excl_zone:LONG' ]  [ 'result:GTS' ] ]
    ]
    'name' 'discords'
    'examples' []
}
'.info' STORE

<%
  !$.info INFO
  SAVE 'context' STORE

  [ 'gts' 'max_n' 'zone' ] STORE

  // Macro that checks if input GTS has 3 values
  // and return middle value if it is the strict max (or else return NULL)
  <%
    VALUES 'val' STORE
    $val SIZE 3 == DUP
    <%
      $val 1 GET $val 0 GET > &&
      $val 1 GET $val 2 GET > &&
    %>
    IFT
    <% $val 1 GET %>
    <% NULL %>
    IFTE
  %>
  'isMiddleMax' STORE

  // Keep local maximums
  [ $gts <% 0 NaN NaN NaN 5 ROLL @isMiddleMax %> 1 1 0 ] MAP 0 GET 'lmax' STORE


  $lmax SIZE 0 >
  <%
    // Sort ticks by descending value
    [ $lmax TICKLIST $lmax VALUES ] ZIP <% 1 GET -1 * %> SORTBY 'result' STORE

    // exlude ticks that are in the exclusion zone of better ones
    $result 0 REMOVE 'previous' STORE 'remainder' STORE
    [ $previous ] 'result2' STORE

    $remainder
    <%
      'current' STORE

      // current should not be in the zone of each element from result2
      true $result2
      <%
        'toCompare' STORE

        $current 0 GET $toCompare 0 GET - ABS
        $zone <=
        <%
          ! BREAK
        %>
        IFT
      %>
      FOREACH
      
      <% $result2 $current +! DROP %> IFT
    %>
    FOREACH

    // return gts of best candidates
    $gts CLONEEMPTY '+:discords' RENAME
    1 $max_n $result2 SIZE MIN <% $result2 SWAP 1 - GET ADDVALUE %> FOR SORT
  %>
  <%
    // return empty gts
    $gts CLONEEMPTY '+:discords' RENAME
  %>
  IFTE

  $context RESTORE
%>