import { invalid } from '@sveltejs/kit'
import { NEWSLETTER_API_TOKEN, NEWSLETTER_LIST_ID } from '$env/static/private'

const formMessages = {
    PENDING: `Almost there! Please confirm your email address through the email you'll receive soon.`,
    MEMBER_EXISTS_WITH_EMAIL_ADDRESS: `This email address is already subscribed to the newsletter.`,
    INVALID_EMAIL: `Woops. This email doesn't seem to be valid.`,
}


export default async ({ request }) => {
    const formData = await request.formData()
    const email = formData.get('email')

    // Newsletter API request
    const req = await fetch(`https://emailoctopus.com/api/1.6/lists/${NEWSLETTER_LIST_ID}/contacts`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            api_key: NEWSLETTER_API_TOKEN,
            email_address: email,
        })
    })

    const res = await req.json()

    if (res) {
        if (res && res.status !== 'PENDING') {
            // Invalid email
            if (!email.match(/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/)) {
                return invalid(400, {
                    error: 'INVALID_EMAIL',
                    message () { return formMessages[this.error] }
                })
            }

            // Other error
            return invalid(400, {
                error: res.error.code,
                message: formMessages[res.error.code],
            })
        }

        return {
            success: true,
            message: formMessages[res.status],
        }
    }
}