import { Task } from '../models/task.model';

export class Board {
    private _tasks: Task[];
    private static _referenceCount: number = 0;

    constructor() {
        this._tasks = [];
        Board._referenceCount++ ;
    }


    public get referenceCount(): number {
        return Board._referenceCount;
    }


    public get tasks(): Task[] {
        return this._tasks;
    }

    public get taskCount(): number {
        return this._tasks.length;
    }

    public add(task: Task): void {
        if (this._tasks.includes(task)) {
            throw new Error('You already have this task!');
        }
        this._tasks.push(task);
    }

    public remove(task: Task): void {
        const index = this._tasks.indexOf(task);
        if (index > -1) {
            this._tasks.splice(index, 1);
        } else {
            throw new Error('There is no task in the list!');
        }
    }

    toString() {
        if (this._tasks.length === 0) {
            return `
---Task Board---

Tasks:

No tasks at the moment.`;
} else {
    return `
---Task Board---

Tasks:
${this._tasks.join(`--------`)}
        `}
    }
}