import { Injectable } from "@nestjs/common";
import { hash, verify } from "@node-rs/argon2";

@Injectable()
export class HashingService {
	async hashEmail(email: string): Promise<string> {
		const normalizedEmail = email.toLowerCase().trim();
		return this.hashSha256(normalizedEmail);
	}

	async hashIp(ip: string): Promise<string> {
		return this.hashSha256(ip);
	}

	async hashSha256(text: string): Promise<string> {
		const data = new TextEncoder().encode(text);
		const hashBuffer = await crypto.subtle.digest("SHA-256", data);
		return Array.from(new Uint8Array(hashBuffer))
			.map((b) => b.toString(16).padStart(2, "0"))
			.join("");
	}

	async hashPassword(password: string): Promise<string> {
		return hash(password, {
			algorithm: 2,
		});
	}

	async verifyPassword(password: string, hash: string): Promise<boolean> {
		return verify(hash, password);
	}
}