<?php

namespace app\Types;

use app\Exceptions\InvalidRequestException;
use app\Exceptions\InvalidWebhookMessageException;
use app\Hajeebtok;

class WebhookMessage
{
    public private(set) ?string $url;
    public private(set) ?array $embeds;

    public private(set) ?string $content;
    public private(set) ?string $username;
    public private(set) ?string $avatar_url;

    public function __construct(?string $url=null)
    {
        if(empty($url)) $this->url = Hajeebtok::$Config->GetByDotKey("Instance.DiscordWebhookURL");
        else $this->url = $url;
    }

    public function SetAvatarURL(string $avatar_url): void {
        $this->avatar_url = $avatar_url;
    }

    public function SetUsername(string $username): void {
        $this->username = $username;
    }

    public function AddEmbed(array $embed): void {
        $this->embeds[] = $embed;
    }

    public function SetContent(string $content): void {
        $this->content = $content;
    }

    public function Send(): void {
        $data = [];
        if(!empty($this->username)) $data["username"] = $this->username;
        if(!empty($this->avatar_url)) $data["avatar_url"] = $this->avatar_url;
        if(!empty($this->embeds)) $data["embeds"] = $this->embeds;
        if(!empty($this->content)) $data["content"] = $this->content;
        if(empty($this->embeds) && empty($this->content)) throw new InvalidWebhookMessageException(0, 400);

        $this->PostRequest($this->url, $data);
    }

    public static function postRequest(string $url, array $payload): string
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'Content-Length: ' . strlen(json_encode($payload)),
        ]);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        $response = curl_exec($ch);
        $error = curl_error($ch);

        curl_close($ch);

        if ($error) {
            throw new \Exception("Curl error: " . $error);
        }

        return $response;
    }
}