import { Injectable } from '@angular/core';
import { stored } from '@mmstack/primitives';
import { v4 as uuid } from 'uuid';
import generateRandom from './mock';

export type Student = {
	id: string;
	name: string;
	email: string;
	courses: string[];
};

@Injectable({
	providedIn: 'root',
})
export class StudentService {
	students = stored<Student[]>([], {
		key: 'students',
	});

	courses = ['Mathematics', 'Physics', 'Chemistry', 'History', 'Literature'];

	addStudent({ name, email, courses }: Omit<Student, 'id'>) {
		const newStudent: Student = {
			id: uuid(),
			name,
			email,
			courses,
		};

		this.students.update((students) => [...students, newStudent]);
	}

	getStudentById(id: string) {
		return this.students().find((student) => student.id === id);
	}

	updateStudent(student: Student) {
		this.students.update((students) =>
			students.map((s) => (s.id === student.id ? student : s))
		);
	}

	generateMockData() {
		const mockData: Student[] = generateRandom();
		this.students.set(mockData);
	}

	updateStudentCourse(id: string, courses: string[]) {
		this.students.update((students) =>
			students.map((s) => (s.id === id ? { ...s, courses } : s))
		);
	}

	deleteSutdent(id: string) {
		this.students.update((students) => students.filter((s) => s.id !== id));
	}
}