use std::error::Error;

use lettre::{
    message::{
        header::{self, ContentType},
        MultiPart, SinglePart,
    },
    transport::smtp::authentication::Credentials,
    Message, SmtpTransport, Transport,
};
use sqlx::SqlitePool;

use crate::tera::admin::mail::MailToSend;

use super::role::Role;

pub struct Mail {}

impl Mail {
    pub async fn send(db: &SqlitePool, data: MailToSend<'_>, smtp_pw: String) -> bool {
        let mut email = Message::builder()
            .from(
                "ASKÖ Ruderverein Donau Linz <no-reply@rudernlinz.at>"
                    .parse()
                    .unwrap(),
            )
            .reply_to(
                "ASKÖ Ruderverein Donau Linz <info@rudernlinz.at>"
                    .parse()
                    .unwrap(),
            )
            .to("ASKÖ Ruderverein Donau Linz <no-reply@rudernlinz.at>"
                .parse()
                .unwrap());
        let role = Role::find_by_id(db, data.role_id).await.unwrap();
        for rec in role.mails_from_role(db).await {
            let splitted = rec.split(',');
            for single_rec in splitted {
                email = email.bcc(single_rec.parse().unwrap());
            }
        }

        // TODO: handle attachments

        let email = email
            .subject(data.subject)
            .header(ContentType::TEXT_PLAIN)
            .body(String::from(data.body))
            .unwrap();

        let creds = Credentials::new("no-reply@rudernlinz.at".to_owned(), smtp_pw);

        let mailer = SmtpTransport::relay("mail.your-server.de")
            .unwrap()
            .credentials(creds)
            .build();

        // Send the email
        match mailer.send(&email) {
            Ok(_) => return true,
            Err(e) => println!("{:?}", e.source()),
        };
        false
    }
}