type Convertkit = {

	apiSecret: string

}

export async function main(

	resource: Convertkit,

	formId: string,

	filter?: {

		page?: number

		sortOrder?: 'asc' | 'desc'

		subscriberState?: 'active' | 'cancelled'

	}

) {

	// Construct the query parameters.

	const queryParams = new URLSearchParams({

		api_secret: resource.apiSecret

	})

	// Add optional filters to the query parameters.

	if (filter?.page) queryParams.append('page', filter.page.toString())

	if (filter?.sortOrder) queryParams.append('sort_order', filter.sortOrder)

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

	const response = await fetch(endpoint, {

		method: 'GET',

		headers: {

			'Content-Type': 'application/json'

		}

	})

	if (!response.ok) {

		throw new Error(`HTTP error! status: ${response.status}`)

	}

	const data = await response.json()

	return data

}