<?php

    /**
     * Classe para implementacao envio de Emails em Massa ou único!
     * 
     * @author Lucas Awade
     * @Desenvolvedor
     * @version 1.1.0
     */
    require("phpmailer/class.phpmailer.php");

    class SimpleMail {
        ########################################################################
        ##                       CONFIGURACOES CLASSE                         ##
        ########################################################################

        private $log;
        private $limit;
        private $sended = 0;
        private $mailer;

        ########################################################################
        ##                        CONFIGURACOES MAIL                          ##
        ########################################################################
        private $host;
        private $port;
        private $smtpAuth;
        private $smtpSecure;
        private $charset;
        private $mail;
        private $passwd;
        private $title;
        private $subject;

        ########################################################################
        ##                       CONFIGURACOES DEFAULT                        ##
        ########################################################################

        public function __construct($mail, $passwd, $subject, $logger = false) {
            $this->log = new Logger('simplesmailer', $logger, "/var/log/");
            if ($mail && $passwd && $subject) {
                $this->mail = $mail;
                $this->passwd = $passwd;
                $this->subject = $subject;
                $this->phpMailer();
            } else {
                $this->log->error('Nao foi possivel instanciar a Classe SimplesMail,informacoes incompletas!', debug_backtrace());
            }
        }

        /**
         * Metodo de configuração do Host de Envio;
         * @param string $host
         * @param string|int $port
         * @param string $title
         * @param boolean $smtpAuth
         * @param string $smtpSecure
         * @param string $charset
         */
        public function config($host, $port, $title, $smtpAuth = true, $smtpSecure = 'TLS', $charset = 'UTF8') {
            $this->host = $host;
            $this->port = $port;
            $this->title = $title;
            $this->smtpAuth = $smtpAuth;
            $this->smtpSecure = $smtpSecure;
            $this->charset = $charset;
            $this->phpMailer();
        }

        /**
         * Informa um limite de email em massa a ser enviado.
         * 
         * @param int $limit
         */
        public function limitSend($limit) {
            $this->log->debug('Limite de Email: ' . $limit, debug_backtrace());
            $this->limit = $limit;
        }

        /**
         * Mensagem escrito em HTML para envio de um email elaborado.
         * 
         * Os dados em $data devem ser em formato array como o exemplo:
         *     array("MSG_HEADER" => 'Seja Bem vindo', "MSG_FOOTER" => 'Volte Sempre');
         *    
         * @param string $path
         * @param array $data
         */
        public function pathBodyMail($path, $data) {
            $this->log->info('Path HTML Body: ' . $path, debug_backtrace());
            $contents = file_get_contents($path);
            foreach ($data as $key => $value) {
                $contents = str_replace($key, $value, $contents);
            }
            $this->mailer->Body = $contents;
        }

        /**
         * Mensagem simples para o envio rapido de um email.
         * 
         * @param string $message
         */
        public function bodyMessage($message) {
            $this->mailer->Body = $message;
        }

        /**
         * Adiciona no email anexos para serem enviados
         * @param array|string $files
         */
        public function setAddAttachment($files) {
            if ($files) {
                if (is_array($files)) {
                    foreach ($files as $name => $file) {
                        $this->mailer->AddAttachment($file, (is_numeric($name) ? '' : $name));
                    }
                } else {
                    $this->mailer->AddAttachment($files);
                }
            }
        }

        /**
         * Adiciona no email imagens para visualizadas.
         * 
         * #=> Caso o paramtro for um array seu corpo deve ser enviado da seguinte forma:
         * $cid = array('minha_img_jpg' => 'img/path/mail/header.jpg');
         * 
         * #=> Caso for uma string deve se passar o cid caso contrario gera um cid randomico;
         * 
         * @param array|string $images
         */
        public function setAddEmbeddedImage($images, $cid = null) {
            if ($images) {
                if (is_array($images)) {
                    foreach ($images as $name => $image) {
                        $this->mailer->AddEmbeddedImage($image, $name);
                    }
                } else {
                    $cid = $cid ? $cid : rand(100, 999999);
                    $this->mailer->AddEmbeddedImage($image, $cid);
                }
            }
        }

        /**
         * Esta funcao envia os email em massa ou unicos.
         * 
         * Email em massa é necessario passar um array com os emails seu indice que representa o email.
         * 
         * Email unico so é preciso passar o email na variavel $data;
         * 
         * @param array|string $data
         * @param string $indice
         * @return array|boolean
         */
        public function mailing($data, $indice = '') {
            if (is_array($data)) {
                $invalid = array();
                foreach ($data as $mail) {
                    if ($this->sended <= $this->limit) {
                        $mail = $indice ? $mail[$indice] : $mail;
                        $this->setSended();
                        if (!$this->send($mail)) {
                            $invalid[] = $mail;
                        }
                    }
                }
                return $invalid;
            } else {
                if ($this->send($data)) {
                    $this->setSended();
                    return true;
                } else {
                    return false;
                }
            }
        }
        
        public function getErrorSend(){
            return $this->mailer->ErrorInfo;
        }

        ########################################################################
        ##                             ENVIO MAIL                             ##
        ########################################################################

        /**
         * Gerencia a quantidade de email que esta sendo enviado.
         */
        private function setSended() {
            $this->sended++;
        }

        /**
         * Gerencia o envio do email para estar sempre no limite de envio.
         * 
         * @return boolean
         */
        public function getSended() {
            $this->log->debug("Sended: " . $this->sended, debug_backtrace());
            if ($this->sended < $this->limit) {
                return true;
            } else {
                return false;
            }
        }

        /**
         * Metodo responsavel para realizar o envio do email.
         * 
         * @param string $mailFrom
         * @return boolean
         */
        private function send($mailFrom) {
            if (!$this->mailer) {
                $this->log->error("Objeto nao criado!", debug_backtrace());
                return false;
            }

            try {
                $this->mailer->setFrom($this->mail, $this->title);
                $this->mailer->addAddress($mailFrom, $this->title);
                $this->mailer->send();
                $this->mailer->clearAllRecipients();
                $this->log->success("Mail: {$mailFrom} | Send Queue: {$this->sended}", debug_backtrace());
                return true;
            } catch (Exception $ex) {
                if ($this->mailer->ErrorInfo) {
                    $this->log->error("ErrorInfo Mail: " . $this->mailer->ErrorInfo . " | Exception Mail: {$mailFrom} >> " . $ex->getMessage(), debug_backtrace());
                }
            }
        }

        /**
         * Cria as configurações e parametros para ser implementado e enviado os emails.
         * 
         * @void null
         */
        private function phpMailer() {
            $this->log->debug("Instanciando objeto PHPMailer", debug_backtrace());
            $this->mailer = new PHPMailer(true);
            $this->mailer->isSMTP();
            $this->mailer->Host = $this->host;
            $this->mailer->SMTPAuth = $this->smtpAuth;
            $this->mailer->isHTML(true);

            if ($this->smtpAuth) {
                $this->mailer->SMTPSecure = $this->smtpSecure;
                $this->mailer->Username = $this->mail;
                $this->mailer->Password = $this->passwd;
            }
            
            $this->mailer->CharSet = $this->charset;
            $this->mailer->Port = $this->port;
            $this->mailer->Subject = $this->subject;
        }
    }