<?php
namespace nulib\db\_private;

class _create extends _common {
  const SCHEMA = [
    "prefix" => "?string",
    "table" => "string",
    "schema" => "?array",
    "cols" => "?array",
    "suffix" => "?string",
  ];

  static function isa(string $sql): bool {
    #XXX implémentation minimale
    return preg_match("/^create(?:\s+table)?\b/i", $sql);
  }

  static function parse(array $query, ?array &$bindings=null): string {
    #XXX implémentation minimale
    $tmpsql = self::merge_seq($query);
    self::consume('create(?:\s+table)?\b', $tmpsql);
    $sql = ["create table"];
    if ($tmpsql) $sql[] = $tmpsql;

    ## préfixe
    $prefix = $query["prefix"] ?? null;
    if ($prefix !== null) $sql[] = $prefix;

    ## table
    $table = $query["table"] ?? null;
    if ($table !== null) $sql[] = $table;

    ## columns
    $cols = $query["cols"] ?? null;
    if ($cols !== null) {
      $index = 0;
      foreach ($cols as $col => &$definition) {
        if ($col === $index) {
          $index++;
        } else {
          $definition = "$col $definition";
        }
      }; unset($definition);
      $sql[] = "(\n  ".implode("\n, ", $cols)."\n)";
    }

    ## suffixe
    $suffix = $query["suffix"] ?? null;
    if ($suffix !== null) $sql[] = $suffix;

    ## fin de la requête
    return implode(" ", $sql);
  }
}