company

class Company {
    constructor() {
        this.departments = {};
        //{department:{employees: [{name:, salary:, position:},...{}],totalSalaries:totalsum }, }
    }

    addEmployee(name, salary, position, department) {
        if (
            !name ||
            (!salary && salary !== 0) ||
            !position ||
            !department ||
            salary < 0
        ) {
            throw new Error('Invalid input!');
        }
        if (!this.departments.hasOwnProperty(department)) {
            this.departments[department] = { employees: [], totalSalaries: 0 };
        }
        this.departments[department].employees.push({ name, salary, position });
        this.departments[department].totalSalaries += salary;
        return `New employee is hired. Name: ${name}. Position: ${position}`;
    }
    bestDepartment() {
        let outputText = [];
        let bestDeptName = Object.keys(this.departments).sort(
            (a, b) =>
                this.departments[b].totalSalaries /
                    this.departments[b].employees.length -
                this.departments[a].totalSalaries /
                    this.departments[a].employees.length
        )[0];
        let bestDeptAvgSalary =
            this.departments[bestDeptName].totalSalaries /
            this.departments[bestDeptName].employees.length;
        let sortedBestEmployees = this.departments[bestDeptName].employees.sort(
            (a, b) => b.salary - a.salary || a.name.localeCompare(b.name)
        );

        outputText.push(`Best Department is: ${bestDeptName}`);
        outputText.push(`Average salary: ${bestDeptAvgSalary.toFixed(2)}`);
        sortedBestEmployees.forEach((empl) => {
            outputText.push(`${empl.name} ${empl.salary} ${empl.position}`);
        });
        return outputText.join('\n');
    }
}