const random = require('random');

class Storage {
    constructor(a)
    {
        this.work = false;
        this.next = a;
    }
}

class Operator {
    constructor(a, b)
    {
        this.work = false;
        this.a = a;
        this.b = b;
    }
    next()
    {
        return Math.round((Math.random() * (this.b - this.a + 1)) + this.a);
    }
}

class Generator {
    constructor(a, b)
    {
        this.a = a;
        this.b = b;
    }
    next()
    {
        return Math.round((Math.random() * (this.b - this.a + 1)) + this.a);
    }
}

class System {
    constructor()
    {
        this.dt = 1;
        this.count = 0;
        this.queue1 = [];
        this.queue2 = [];
        this.st1 = new Storage(15);
        this.st2 = new Storage(30);
        this.op1 = new Operator(15, 25);
        this.op2 = new Operator(30, 50);
        this.op3 = new Operator(20, 60);
        this.generator = new Generator(8, 12);
    }

    timeModelling()
    {
        let aim = 300;
        let genTime = this.generator.next();
        let op1Time = 0;
        let op2Time = 0;
        let op3Time = 0;
        let st1Time = 0;
        let st2Time = 0;
        let amount = 0;
        let broken = 0;
        let currentTime = 0;

        while (this.count < aim)
        {
            if (currentTime >= op1Time && this.op1.work)
            {
                this.queue1.push(1);
                this.op1.work = false;
            }
            if (currentTime >= op2Time && this.op2.work)
            {
                this.queue1.push(1);
                this.op2.work = false;
            }
            if (currentTime >= op3Time && this.op3.work)
            {
                this.queue2.push(1);
                this.op3.work = false;
            }

            if (amount != 300)
            {
                if (currentTime >= genTime)
                {
                    genTime = currentTime + this.generator.next();
                    amount++;
                    if (this.op1.work)
                    {
                        if (this.op2.work)
                        {
                            if (this.op3.work)
                                broken++;
                            else
                            {
                                this.op3.work = true;
                                op3Time = currentTime + this.op3.next();
                            }
                        }
                        else
                        {
                            this.op2.work = true;
                            op2Time = currentTime + this.op2.next();
                        }
                    }
                    else
                    {
                        this.op1.work = true;
                        op1Time = currentTime + this.op1.next();
                    }
                }
            }

            if(currentTime >= st1Time)
            {
                if (this.st1.work)
                {
                    this.count++;
                    this.st1.work = false;
                    this.queue1.pop();
                    if (this.count == aim)
                    {
                        console.log("Количество отказов: ", broken,"\nКоличество поступивших заявок: ", amount, "\nКоличество обработанных заявок: ", this.count, "\nВремя работы: ", currentTime, "\nВероятность отказа: ", (broken/amount)*100, "%");
                        break;
                    }
                }
                if (this.queue1.length > 0)
                {
                    if (!this.st1.work)
                    {
                        st1Time = currentTime + this.st1.next;
                        this.st1.work = true;
                    }
                }
            }
            if(currentTime >= st2Time)
            {
                if (this.st2.work)
                {
                    this.count++;
                    this.st2.work = false;
                    this.queue2.pop();
                    if (this.count == aim)
                    {
                        console.log("Количество отказов: ", broken,"\nКоличество поступивших заявок: ", amount, "\nКоличество обработанных заявок: ", this.count, "\nВремя работы: ", currentTime, "\nВероятность отказа: ", (broken/amount)*100, "%");
                        break;
                    }
                }
                if (this.queue2.length > 0)
                {
                    if (!this.st2.work)
                    {
                        st2Time = currentTime + this.st2.next;
                        this.st2.work = true;
                    }
                }
            }

            if (amount == 300 && this.queue1.length == 0 && this.queue2.length == 0 && !this.op1.work && !this.op2.work && !this.op3.work)
            {
                console.log("Количество отказов: ", broken,"\nКоличество поступивших заявок: ", amount, "\nКоличество обработанных заявок: ", this.count, "\nВремя работы: ", currentTime, "\nВероятность отказа: ", (broken/amount)*100, "%");
                break;
            }

            currentTime += this.dt;
        }
    }
}

function calculate()
{
    let system = new System();
    system.timeModelling();
}

calculate();