<?php

namespace NoccyLabs\SimpleJwt\Validator;

use NoccyLabs\SimpleJwt\JwtToken;
use NoccyLabs\SimpleJwt\Key\KeyInterface;

class JwtValidator
{
    private $requireHeaders = [];

    private $requireClaims = [];

    public function __construct()
    {
        $this->requireHeaders = [
            'alg',
            'typ',
        ];
    }

    public function addRequiredClaim(string $name)
    {
        $this->requireClaims[$name] = true;
    }

    public function addRequiredClaimWithValue(string $name, $value)
    {
        $this->requireClaims[$name] = [ $value ];
    }

    public function validateToken(JwtToken $token)
    {
        if (!$token->isValid()) {
            throw new JwtTokenException("The token is not valid");
        }

        if (!$token->header->hasAll($this->requireHeaders)) {
            throw new JwtHeaderException("The token is missing one or more required headers");
        }

        if (!$token->claims->hasAll($this->requireClaims)) {
            throw new JwtHeaderException("The token is missing one or more required claims");
        }

        return true;
    }

    public function validate(KeyInterface $key, string $raw)
    {
        $token = new JwtToken($key, $raw);
        if ($this->validateToken($token)) {
            return $token;
        }
    }
}