import {Options} from "nodemailer/lib/mailer";
import {ParsedUrlQueryInput} from "querystring";

import MailError from "./MailError.js";
import MailTemplate from "./MailTemplate.js";

export default class Mail {
    private readonly options: Options = {};

    public constructor(
        private readonly template: MailTemplate,
        private readonly data: ParsedUrlQueryInput = {},
    ) {
        this.options.subject = this.template.getSubject(data);

        this.verifyData();
    }

    private verifyData() {
        for (const forbiddenField of [
            'to',
        ]) {
            if (this.data[forbiddenField] !== undefined) {
                throw new MailError(`Can't use reserved data.${forbiddenField}.`);
            }
        }
    }

    public getTemplate(): MailTemplate {
        return this.template;
    }

    public getData(): ParsedUrlQueryInput {
        return {...this.data};
    }

    public getOptions(): Options {
        return {...this.options};
    }
}