<?php

namespace App\Models\Api;

use App\Jobs\SetApiTokenStats;
use App\Lib\Helper;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Str;
use Rennokki\QueryCache\Traits\QueryCacheable;

class ApiToken extends Model
{
    use HasFactory;
    use QueryCacheable;

    // TODO: Ajouter aussi stats.

    /**
     * The attributes that should be cast.
     *
     * @var array
     */
    protected $casts = [
        'token_date' => 'datetime'
    ];

    /**
     * The timeout cache for this model
     *
     * @var integer
     */
    protected $cacheFor = 0;

    /**
     * Service
     *
     * @param array $attributes
     */
    public function __construct(array $attributes = [])
    {
        $this->cacheFor = config('api.servicesDBCache') * 60;
        parent::__construct($attributes);
    }

    /**
     * Perform any actions required after the model boots.
     *
     * @return void
     */
    protected static function booted()
    {
        static::creating(function (self $model) {
            if (!$model->public_token) {
                $model->generatePublicToken();
            }
            if (!$model->private_token) {
                $model->generatePrivateToken();
            }
        });
        static::created(function () {
            // * Flush Eloquent cache.
            self::flushQueryCache();
        });
        static::updated(function () {
            // * Flush Eloquent cache.
            self::flushQueryCache();
        });
        static::deleted(function () {
            // * Flush Eloquent cache.
            self::flushQueryCache();
        });
    }

    // * METHODS

    /**
     * Increment API CRM Stat
     *
     * @return void
     */
    public function incrementStat(): void
    {
        SetApiTokenStats::dispatch($this)
            ->afterResponse()
            ->onConnection('database')
            ->onQueue('stats');
    }

    /**
     * Generates new public token
     *
     * @return string
     */
    public function generatePublicToken(): string
    {
        $this->public_token = hash('ripemd160', Str::uuid());
        $this->token_date   = now();
        return $this->public_token;
    }

    /**
     * Generates new private token
     * It store the crypted private token in model
     * and returns the plain private token
     *
     * @return string
     */
    public function generatePrivateToken(): string
    {
        $pwd                 = hash('sha256', Str::uuid());
        $this->private_token = Crypt::encryptString($pwd);
        $this->token_date    = now();
        return $pwd;
    }

    /**
     * Get Service from bearerToken with its brand
     *
     * @param string $bearerToken
     * @return \App\Models\Api\ApiToken
     * @throws \Illuminate\Database\Eloquent\ModelNotFoundException If the token matches no known service.
     */
    public static function getFromBearerToken(string $bearerToken): self
    {
        $apiTokens = static::all();
        /** @var \App\Models\Api\ApiToken $apiToken */
        foreach ($apiTokens as $apiToken) {
            // * Keep compatibility with V3.
            if ($bearerToken === $apiToken->public_token) {
                return $apiToken;
            }
        }
        throw new ModelNotFoundException('Could not find apiToken from bearer token');
    }

    /**
     * Authenticate the request for this service
     *
     * This will check hash-mac and that the request is wellformed
     *
     * The request should have the minimum following parameters
     *  - timestamp using format Y-m-d H:i:s, and must be UTC (Greenwich Mean Time)
     *  - bearerToken the public token generated by the crm
     *  - signature the hashmac signature of the request
     *
     * ! Signature must be calculated with every parameter urlencode once only
     * ! All parameters to calculate the signature must be sorted (natural sort asc)
     *
     * ! Signature should look like
     * * httpVerb\n
     * * uri\n
     * * queryString
     *
     * ! httpVerb as well as uri must be lower case
     * ! uri should include scheme, host and path and nothing else, if path is empty a trailing slash should be added
     * ! eg: https://ldc-crm.fr/customer/1  or  https://ldc-crm.fr/
     * ! The query string shall be separated with '&', eg param1=value1&param2=value2
     * ! Key names and values of the query string must be url encoded using RFC 3986
     * ! http://www.faqs.org/rfcs/rfc3986.html
     * ! Signature must be hmac sha256 using the private key generatedby the crm
     *
     *     * ! They should then be concat in a string separated by \n
     *
     *
     *
     * @param \Illuminate\Http\Request $request
     * @return boolean
     * @throws \App\Exceptions\Api\V2\CrmException If an error occurs.
     */
    public function authenticateApi(Request $request): bool
    {
        // ! Hack to prevent Laravel to cast empty strings to null or the opposite.
        // ! If cannot decode json user legacy all() method.
        $data = \json_decode($request->getContent(), true);
        $data = (\is_array($data) and \json_last_error() === \JSON_ERROR_NONE) ?
            array_replace_recursive($request->all(), $data) : $request->all();

        $calculatedHash = Helper::signRequest(
            $this->private_token,
            $request->getUri(),
            $request->getMethod(),
            $data
        );

        // ! Très important hash_equals https://fr.wikipedia.org/wiki/Attaque_temporelle
        return \hash_equals($calculatedHash, $request->signature);
    }
}