import {z} from 'zod'

export type GetApi30ConversationsArgs = {fields?: Array<string> | undefined, exclude_fields?: Array<string> | undefined, count?: number | undefined, offset?: number | undefined, has_unread_messages?: ('true' | 'false') | undefined, list_id?: string | undefined, campaign_id?: string | undefined};

export type GetApi30ConversationsOptions = {baseUrl?: string | undefined, bearerToken?: string | undefined, fetch?: typeof fetch | undefined};

export const getApi30ConversationsResponse = z.object({_links: z.array(z.object({href: z.string().optional(), method: z.enum(["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS", "HEAD"]).optional(), rel: z.string().optional(), schema: z.string().optional(), targetSchema: z.string().optional()})).optional(), conversations: z.array(z.object({_links: z.array(z.object({href: z.string().optional(), method: z.enum(["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS", "HEAD"]).optional(), rel: z.string().optional(), schema: z.string().optional(), targetSchema: z.string().optional()})).optional(), campaign_id: z.string().optional(), from_email: z.string().optional(), from_label: z.string().optional(), id: z.string().optional(), last_message: z.object({from_email: z.string().optional(), from_label: z.string().optional(), message: z.string().optional(), read: z.boolean().optional(), subject: z.string().optional(), timestamp: z.string().optional()}).optional(), list_id: z.string().optional(), message_count: z.number().int().optional(), subject: z.string().optional(), unread_messages: z.number().int().optional()})).optional(), total_items: z.number().int().optional()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * List conversations
 * 
 * GET /3.0/conversations
 * 
 * Also accepts auth: oauth2
 */
export const getApi30Conversations = async (args: GetApi30ConversationsArgs, options?: GetApi30ConversationsOptions) => {
const {baseUrl = "https://api.mailchimp.com", fetch: fetchFn = fetch, bearerToken} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.fields != null) query.append("fields", args.fields.join(','))
if (args.exclude_fields != null) query.append("exclude_fields", args.exclude_fields.join(','))
if (args.count != null) query.append("count", String(args.count))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.has_unread_messages != null) query.append("has_unread_messages", String(args.has_unread_messages))
if (args.list_id != null) query.append("list_id", String(args.list_id))
if (args.campaign_id != null) query.append("campaign_id", String(args.campaign_id))
if (bearerToken !== undefined) headers.set('authorization', `Bearer ${bearerToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/3.0/conversations${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApi30ConversationsResponse, await res.json())
};