type Convertkit = {

	apiSecret: string

}

const fetchSubscriberByEmail = async (resource: Convertkit, email: string) => {

	const queryParams = new URLSearchParams({

		api_secret: resource.apiSecret,

		email_address: email

	})

	const endpoint = `https://api.convertkit.com/v3/subscribers?${queryParams.toString()}`

	const response = await fetch(endpoint, {

		method: 'GET',

		headers: {

			'Content-Type': 'application/json'

		}

	})

	if (!response.ok) {

		throw new Error(

			`Failed to fetch subscriber that matches the provided email. Response code: ${response.status}`

		)

	}

	const data = await response.json()

	if (data.subscribers && data.subscribers.length > 0) {

		return data.subscribers[0]

	}

	throw new Error(`No subscriber found with the provided email`)

}

const fetchSubscribedTags = async (resource: Convertkit, subscriberId: string) => {

	const queryParams = new URLSearchParams({

		api_secret: resource.apiSecret

	})

	const endpoint = `https://api.convertkit.com/v3/subscribers/${subscriberId}/tags?${queryParams.toString()}`

	const response = await fetch(endpoint, {

		method: 'GET',

		headers: {

			'Content-Type': 'application/json'

		}

	})

	if (!response.ok) {

		throw new Error(`Failed to fetch tags. Response code: ${response.status}`)

	}

	const data = await response.json()

	if (data.tags) {

		return data.tags

	}

	throw new Error(`No tags found for the subscriber`)

}

export async function main(resource: Convertkit, email: string) {

	const subscriber = await fetchSubscriberByEmail(resource, email)

	const tags = await fetchSubscribedTags(resource, subscriber.id)

	return tags

}