//TODO Moet een attribute in die valves = {} houd zodat daar alle child valves in bijgehouden wordt

/**
 * @file valveGroupControlClass.js
 *
 * Permission is hereby granted to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to use it for personal 
....
*/


//load local dependencies #NOTE: Vul hier nog de juiste dependencies in als meer nodig of sommige niet nodig
const EventEmitter = require('events');
const Logger = require('../../generalFunctions/helper/logger');
const State = require('../../generalFunctions/helper/state/state');
const { MeasurementContainer } = require('../../generalFunctions/helper/measurements/index');


//load all config modules #NOTE: Vul hier nog de juiste dependencies in als meer nodig of sommige niet nodig 
const defaultConfig = require('./valveGroupControlConfig.json');
const ConfigUtils = require('../../generalFunctions/helper/configUtils');

//load registration utility #NOTE: Vul hier nog de juiste dependencies in als meer nodig of sommige niet nodig
const ChildRegistrationUtils = require('../../generalFunctions/helper/childRegistrationUtils');

class ValveGroupControl { 
    constructor(valveGroupControlConfig = {}, stateConfig = {}) { 
        this.emitter = new EventEmitter(); // nodig voor ontvangen en uitvoeren van events emit() en on() --> Zien als internet berichten (niet bedraad in node-red)
        this.configUtils = new ConfigUtils(defaultConfig); // nodig voor het ophalen van de default configuaratie 
        this.config = this.configUtils.initConfig(valveGroupControlConfig); //valve configurations die bij invoer in node-red worden gegeven  
        
        // Initialize measurements
        this.measurements = new MeasurementContainer();
        this.valves = {}; // hold child object so we can get information from its child valves 

        // Initialize variables
        this.maxDeltaP = 0; // max deltaP is 0 als er geen child valves zijn
        
        // Init after config is set
        this.logger = new Logger(this.config.general.logging.enabled, this.config.general.logging.logLevel, this.config.general.logging.name);
        this.state = new State(stateConfig, this.logger); // Init State manager and pass logger
        this.state.stateManager.currentState = "operational"; // Set default state to operational

        this.currentMode = this.config.mode.current;
    
        this.childRegistrationUtils = new ChildRegistrationUtils(this); // Child registration utility
    }

      // -------- Config -------- //
    updateConfig(newConfig) {
        this.config = this.configUtils.updateConfig(this.config, newConfig);
    }

    isValidSourceForMode(source, mode) {
        const allowedSourcesSet = this.config.mode.allowedSources[mode] || [];
        this.logger.info(`Allowed sources for mode '${mode}': ${allowedSourcesSet}`);
        return allowedSourcesSet.has(source);
    }

    async handleInput(source, action, parameter) {
        if (!this.isValidSourceForMode(source, this.currentMode)) {
          let warningTxt = `Source '${source}' is not valid for mode '${this.currentMode}'.`;
          this.logger.warn(warningTxt);
          return {status : false , feedback: warningTxt};
        }
    
        this.logger.info(`Handling input from source '${source}' with action '${action}' in mode '${this.currentMode}'.`);
        try {
          switch (action) {
            case "execSequence":
              await this.executeSequence(parameter);
              break;
            case "totalFlowChange": // total flow veranderd dus nieuwe flow per valve berekenen. 
              this.measurements.type("totalFlow").variant("predicted").position("upstream").value(parameter);
              const totalFlow = this.measurements.type("totalFlow").variant("predicted").position("upstream").getCurrentValue(); //CHECKPOINT
              this.logger.info('Total flow changed to: ' + totalFlow); //CHECKPOINT
              await this.calcValveFlows(); 
              break;
            case "emergencyStop":
              this.logger.warn(`Emergency stop activated by '${source}'.`);
              await this.executeSequence("emergencyStop");
              break;
            case "statusCheck":
              this.logger.info(`Status Check: Mode = '${this.currentMode}', Source = '${source}'.`);
              break;
            default:
              this.logger.warn(`Action '${action}' is not implemented.`);
              break;
          }
          this.logger.debug(`Action '${action}' successfully executed`);
          return {status : true , feedback: `Action '${action}' successfully executed.`};
        } catch (error) {
          this.logger.error(`Error handling input: ${error}`);
        }
        
    }

    setMode(newMode) {
        const availableModes = defaultConfig.mode.current.rules.values.map(vgc => vgc.value);
        if (!availableModes.includes(newMode)) {
          this.logger.warn(`Invalid mode '${newMode}'. Allowed modes are: ${availableModes.join(', ')}`);
          return;
        }
    
        this.currentMode = newMode;
        this.logger.info(`Mode successfully changed to '${newMode}'.`);
    }

   

    // -------- Sequence Handlers -------- //  
  async executeSequence(sequenceName) {

    const sequence = this.config.sequences[sequenceName];

    if (!sequence || sequence.size === 0) {
      this.logger.warn(`Sequence '${sequenceName}' not defined.`);
      return;
    }

    this.logger.info(` --------- Executing sequence: ${sequenceName} -------------`);

    for (const state of sequence) {
      try {
        await this.state.transitionToState(state);
        // Update measurements after state change

      } catch (error) {
        this.logger.error(`Error during sequence '${sequenceName}': ${error}`);
        break; // Exit sequence execution on error
      }
    }
    }

  calcValveFlows() {   
    const totalFlow = this.measurements.type("totalFlow").variant("predicted").position("upstream").getCurrentValue(); // haal de totalFlow op uit de measurement container
    let totalKv = 0; 
    this.logger.info('this.valves = ' + this.valves); //CHECKPOINT
    for (const key in this.valves){ //bereken sum kv values om verdeling total flow te maken
        this.logger.info('kv: ' + this.valves[key].kv); //CHECKPOINT
        if (this.valves[key].state.getCurrentPosition() != null) {
            totalKv += this.valves[key].kv;
            this.logger.info('Total Kv = ' + totalKv); //CHECKPOINT
        }
    }

    for (const key in this.valves){ 
        const valve = this.valves[key]; 
        const ratio = valve.kv / totalKv; 
        const flow = ratio * totalFlow; // bereken flow per valve 

        // Check of update in valve object vanuit valvegroupcontrol werk
        this.logger.info(`Flow for valve ${key} is ${flow} and updateFlowKlep event triggered in valve object`); 
        const currentFlow = valve.measurements.type("flow").variant("predicted").position("downstream").getCurrentValue(); 
        this.logger.info('Current flow valve = ' + currentFlow); 

        //update flow per valve in de object zelf wat daar vervolgens weer de nieuwe deltaP berekent
        valve.updateFlowKlep(flow); 
        this.logger.info('--> Sending updated flow to valves --> ') //Checkpoint 


        // Check of update in valve object vanuit valvegroupcontrol werk
        const updatedFlow = valve.measurements.type("flow").variant("predicted").position("downstream").getCurrentValue();
        this.logger.info('Updated flow valve = ' + updatedFlow);
    }
  }

  calcMaxDeltaP() { // bereken de max deltaP van alle child valves
    let maxDeltaP = 0; //max deltaP is 0 als er geen child valves zijn
    this.logger.info('CHECK!'); //CHECKPOINT
    this.logger.info('CHECK! Valves: ' + this.valves); //CHECKPOINT
    this.logger.info('Calculating new max deltaP...'); 
    for (const key in this.valves) {
      const valve = this.valves[key]; //haal de child valve object op
      const deltaP = valve.measurements.type("pressure").variant("predicted").position("delta").getCurrentValue(); //get delta P
      if (deltaP > maxDeltaP) { //als de deltaP van de child valve groter is dan de huidige maxDeltaP, dan update deze
        maxDeltaP = deltaP;
      }
    }
    this.logger.info('Max Delta P updated to: ' + maxDeltaP); 

    this.maxDeltaP = maxDeltaP; //update de max deltaP in de measurement container van de valveGroupControl class
    
}


  getOutput() { 

    // Improved output object generation
    const output = {};
    //build the output object
    this.measurements.getTypes().forEach(type => {
      this.measurements.getVariants().forEach(variant => {
        this.measurements.getPositions().forEach(position => {

        const value = this.measurements.type(type).variant(variant).position(position).getCurrentValue(); //get the current value of the measurement
        
      
        if (value != null) {
          output[`${position}_${variant}_${type}`] = value;
        }
      });
      });
    });

    //fill in the rest of the output object
    output["state"] = this.state.getCurrentState();
    output["moveTimeleft"] = this.state.getMoveTimeLeft();
    output["mode"] = this.currentMode;
    output["maxDeltaP"] = this.maxDeltaP; 

    //this.logger.debug(`Output: ${JSON.stringify(output)}`);

    return output;
  }

}

module.exports = ValveGroupControl;


/*
const valve = require('../../valve/dependencies/valveClass.js');
const valve1 = new valve();
const valve2 = new valve();
const valve3 = new valve();

const vgc = new ValveGroupControl(); 

vgc.childRegistrationUtils.registerChild(valve1, "downStream");
vgc.childRegistrationUtils.registerChild(valve2, "downStream");
vgc.childRegistrationUtils.registerChild(valve3, "downStream");

vgc.handleInput("parent", "totalFlowChange", Number(1600));
*/