import {SimpleGamesystem} from "../../gamesystems/SimpleGamesystem";
import {SimpleState} from "../../gamesystems/SimpleState";
import {SimpleTransition} from "../../gamesystems/SimpleTransition";

export class SimpleGamesystemParser {

  static parseSimpleGamesystem(jsonObject: any) : SimpleGamesystem {
    const gamesystemName = jsonObject.componentName;
    const gamesystemDescription = jsonObject.componentDescription;
    const simpleStates = SimpleGamesystemParser.parseSimpleStates(jsonObject)
    const simpleTransitions = SimpleGamesystemParser.parseSimpleTransitions(jsonObject, simpleStates);

    const gamesystem = new SimpleGamesystem(gamesystemName, gamesystemDescription);
    gamesystem.states = simpleStates;
    gamesystem.transitions = simpleTransitions;

    return gamesystem;
  }

  static parseSimpleStates(jsonObject: any): SimpleState[] {
    const states: SimpleState[] = [];
    for(let i=0; i<jsonObject.states.length; i++) {
      const state = new SimpleState("", "");
      Object.assign(state, jsonObject.states[i]);
      states.push(state);
    }
    return states;
  }

  static parseSimpleTransitions(jsonObject: any, states: SimpleState[]): SimpleTransition[] {
    const transitions: SimpleTransition[] = [];
    for(let i=0; i<jsonObject.transitions.length; i++) {
      const startingStateLabel = jsonObject.transitions[i].startingState;
      const endingStateLabel = jsonObject.transitions[i].endingState;

      const startingState = states.find(state => state.stateLabel === startingStateLabel);
      const endingState = states.find(state => state.stateLabel === endingStateLabel);

      if(startingState != undefined && endingState != undefined) {
        transitions.push(new SimpleTransition(startingState, endingState));
      } else {
        console.error("Starting or Ending State are not defined!", startingState, endingState)
      }
    }
    return transitions;
  }
}