<?php 

namespace Gogs\API\Request {

    /**
     * Base class for request types.
     *
     * Each request shall inherit this class to ensure
     * it will have the correct methods required by interface,
     * and get the cURL functionality.
     *
     * @deprecated since 0.1, to be removed in 3.0
     * @abstact
     */
    abstract class Base implements RequestInterface {

        protected $loaded = false;
        protected $scope;

        use \Gogs\Lib\Curl\Client {
            get as private mget;
            post as private mpost;
            delete as private mdelete;
        }

        /**
         * @param string $api_url The URL to the API.
         * @param string $api_token A token for an authorized user
         */
        public function __construct(string $api_url, string $api_token) {
            $this->url = $api_url;
            $this->token = $api_token;
        }

        /**
         * Load an object.
         *
         * If `$force = true` the object will be fetched
         * from the Gogs API again.
         *
         * @deprecated since 2.0 to be removed in 3.0
         * @return object
         */
        final public function load(bool $force = false) {
            $this->set_scope("get");

            if ($this->loaded && !$force)
                return $this;

            $jenc =  $this->mget($this->scope);

            $this->json_set_property($this->json_decode($jenc));
            $this->loaded = true;

            return $this;
        }

        /**
         * Perform a GET-request against the Gogs API.
         *
         * Ensure the correct scope i set first, with
         * ```php
         * $this->set_scope("*valid scope*"); // e.g create
         * ```
         *
         * @param array $params The parameters
         * @return string
         */
        final protected function method_get(array $params = array()) {
            return $this->mget($this->scope, $params);
        }

        /**
         * Perform a POST-request against the Gogs API.
         *
         * Ensure the correct scope i set first, with
         * ```php
         * $this->set_scope("*valid scope*"); // e.g create
         * ```
         *
         * @param array $params The parameters
         * @return string
         */
        final protected function method_post(array $params = array()) {
            return $this->mpost($this->scope, $params);
        }

        /**
         * Perform a DELETE-request against the Gogs API.
         *
         * Ensure the correct scope i set first, with
         * ```php
         * $this->set_scope("*valid scope*"); // e.g delete
         * ```
         *
         * @return string
         */
        final protected function method_delete() {
            return $this->mdelete($this->scope);
        }

        /** 
         * Get object references by identifier.
         *
         * @param string $s Identifier to look up.
         * @return null
         */
        public function get(string $s) {
            if (!$this->set_scope("get"))
                throw new Exception\NotImplementedException("::get:: Not implemented for class");

            return null;
        }

        /** 
         * Create object inherited by class.
         *
         * Child class must add a scope for 'create' and ensure child is not *loaded*,
         * otherwise will `create` throw an exception.
         *
         * @param string $args yeah, well
         * @return true
         */
        public function create(...$args) {

            if ($this->loaded)
                throw new Exception\InvalidMethodRequestException("::create:: Cant create on an git-initialized object. Create new object.");

            if (!$this->set_scope("create"))
                throw new Exception\NotImplementedException("::create:: Not implemented for class");

            $ret = $this->method_post(...$args);

            $this->json_set_property($this->json_decode($ret));

            return true;
        }

        /**
         * Patch (update) object
         *
         * @throws Exception\InvalidMethodRequestException
         * @throws Exception\NotImplementedException
         */
        public function patch() {

            if (!$this->loaded)
                throw new Exception\InvalidMethodRequestException("::patch:: Cant patch an git-uninitialized object. Load it first.");

            if (!$this->set_scope("patch"))
                throw new Exception\NotImplementedException("::patch:: Not implemented for class");
        }

        public function delete() {
            if (!$this->set_scope("delete"))
                throw new Exception\NotImplementedException("::delete:: Not implemented for class");

            return $this->method_delete();
        }

        protected function json_decode(string $jenc) {
            $obj = json_decode($jenc);

            $this->json_error();

            return $obj;
        }

        protected function json_encode(iterable $jdec) {
            $jenc = json_encode($jdec);

            $this->json_error();

            return $jenc;
        }

        protected function json_error() {
            if (($err = json_last_error()) != JSON_ERROR_NONE)
                throw new Exception\RequestErrorException(json_last_error_msg(), $err);
        }

        abstract protected function json_set_property($obj);
        abstract protected function set_scope(string $method);

        public function __destruct() {}
    }

}

?>