export class Permissions {
	static readonly Admin = 2 << 0;
	static readonly Users = 2 << 1;
	static readonly Reports = 2 << 2;
	static readonly Feedback = 2 << 3;
	static readonly Settings = 2 << 4;
	static readonly Tools = 2 << 5;

	readonly value: number;

	constructor(value: number | number[] | null) {
		if (typeof value == 'number') {
			this.value = value;
		} else if (value == null) {
			this.value = 0;
		} else {
			let finalValue = 0;
			for (const v of Object.values(value)) {
				finalValue |= v;
			}
			this.value = finalValue;
		}
	}

	toJSON() {
		return this.value;
	}

	static allPermissions(): number[] {
		return [
			Permissions.Admin,
			Permissions.Users,
			Permissions.Reports,
			Permissions.Feedback,
			Permissions.Settings,
			Permissions.Tools
		];
	}

	admin(): boolean {
		return (this.value & Permissions.Admin) != 0;
	}

	users(): boolean {
		return (this.value & Permissions.Users) != 0;
	}
	reports(): boolean {
		return (this.value & Permissions.Reports) != 0;
	}
	feedback(): boolean {
		return (this.value & Permissions.Reports) != 0;
	}
	settings(): boolean {
		return (this.value & Permissions.Reports) != 0;
	}
	tools(): boolean {
		return (this.value & Permissions.Tools) != 0;
	}

	asArray(): number[] {
		const array = [];
		for (const perm of Permissions.allPermissions()) {
			if ((this.value & perm) != 0) {
				array.push(perm);
			}
		}
		return array;
	}
}