type Convertkit = {

	apiSecret: string

}

export async function main(

	resource: Convertkit,

	filter?: {

		page?: number

		sortOrder?: 'asc' | 'desc'

		sortField?: 'cancelled_at'

		from?: string // Format: yyyy-mm-dd

		to?: string // Format: yyyy-mm-dd

		updatedFrom?: string // Format: yyyy-mm-dd

		updatedTo?: string // Format: yyyy-mm-dd

		emailAddress?: string

	}

) {

	// 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)

	if (filter?.sortField) queryParams.append('sort_field', filter.sortField)

	if (filter?.from) queryParams.append('from', filter.from)

	if (filter?.to) queryParams.append('to', filter.to)

	if (filter?.updatedFrom) queryParams.append('updated_from', filter.updatedFrom)

	if (filter?.updatedTo) queryParams.append('updated_to', filter.updatedTo)

	if (filter?.emailAddress) queryParams.append('email_address', filter.emailAddress)

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

	}

	const data = await response.json()

	return data

}