import { JSRandomEngine } from "./JSRandomEngine";
import { LCG } from "./LCG";
import { RandomEngine, SeedableRandomEngine } from "./RandomEngine";

export class SeedGenerator
{
  static fromText( source:string, randomEngine:SeedableRandomEngine<any> = null )
  {
    if ( ! randomEngine )
    {
      randomEngine = new LCG();
    }

    randomEngine.setSeed( 18593 );

    let seed = 0;

    for ( let i = 0; i < source.length; i++ )
    {
      let characterValue = source.charCodeAt( i );

      seed += characterValue * 767417 + 13 + randomEngine.next() * characterValue;

      if ( seed > 32000 )
      {
        seed = seed % 32000;
      }
    }

    console.log( "SEED FROM TEXT:", source, seed )

    return seed;

  }
}