import type { Student } from "./student-common.ts";

/**
 * Class to represent a Group of Students.
 */
class Group {
	name: string;
	students: Array<Student> = [];

	constructor(name: string, students?: Array<Student>) {
		this.name = name;
		if (typeof students !== "undefined") {
			this.students = students;
		}
	}

	setStudents(students: Array<Student>) {
		this.students = students;
	}

	addStudent(student: Student) {
		this.students.push(student);
	}

	async getStudents() {
		return this.students;
	}
}

const groups = new Map();

function buildGroups(students: Array<Student>) {
	for (const student of students) {
		let group = groups.get(student.group);

		if (!group) {
			group = new Group(student.group);
			groups.set(student.group, group);
		}

		group.addStudent(student);
	}
}

export { Group, buildGroups, groups as _groups };