import { Component, OnInit } from '@angular/core';

type State = 'VIEW INITIAL DETAILS'|'ENTER MORE DETAILS'|'ASSIGN COMMITTEE';
type Role = 'Investigator'|'Hod'|'Panel';

@Component({
  selector: 'app-investigate-business-entities-and-individuals',
  templateUrl: './investigate-business-entities-and-individuals.component.html',
  styleUrls: ['./investigate-business-entities-and-individuals.component.scss']
})
export class InvestigateBusinessEntitiesAndIndividualsComponent implements OnInit {
    hasEnoughData = false;

    state: State;
    stateHistory: Array<State> = [];

    loginRole: Role;

    canExecute: boolean;
    executingRole: Role;

    constructor() {
        const loginEmail = localStorage.getItem('loginEmail');

        if (loginEmail && loginEmail.toLocaleLowerCase().startsWith('hod')) {
            this.loginRole = 'Hod';
        } else if (loginEmail && loginEmail.toLocaleLowerCase().startsWith('panel')) {
            this.loginRole = 'Panel';
        } else {
            this.loginRole = 'Investigator';
        }

        const savedState = localStorage.getItem('state');

        switch (savedState) {
            case 'ENTER MORE DETAILS':
                this.state = 'ENTER MORE DETAILS';
                this.executingRole = 'Investigator';
                break;
            case 'ASSIGN COMMITTEE':
                this.state = 'ASSIGN COMMITTEE';
                this.executingRole = 'Hod';
                break;
            default:
                this.state = 'VIEW INITIAL DETAILS';
                this.executingRole = 'Investigator';
        }

        this.canExecute = this.loginRole === this.executingRole;
    }

    proceed() {
        this.stateHistory.push(this.state);

        switch (this.state) {
            case 'VIEW INITIAL DETAILS':
                if (this.hasEnoughData) {
                    this.state = 'ASSIGN COMMITTEE';
                    this.executingRole = 'Hod';
                } else {
                    this.state = 'ENTER MORE DETAILS';
                    this.executingRole = 'Investigator';
                }
                break;
            case 'ENTER MORE DETAILS':
                this.state = 'ASSIGN COMMITTEE';
                this.executingRole = 'Hod';
                break;
        }

        localStorage.setItem('state', this.state);

        this.canExecute = this.loginRole === this.executingRole;
    }

    goBack() {
        const state = this.stateHistory.pop();

        if (state) {
            this.state = state;
        }
    }

    ngOnInit(): void {
    }

}