import {z} from 'zod'

export type GetApiWhatsappConversationsArgs = {phone_number_id?: string | undefined, phone_number?: string | undefined, status?: ('active' | 'ended') | undefined, assigned_user_id?: string | undefined, unassigned?: boolean | undefined, created_after?: string | undefined, created_before?: string | undefined, last_active_after?: string | undefined, last_active_before?: string | undefined, limit?: number | undefined, before?: string | undefined, after?: string | undefined};

export type GetApiWhatsappConversationsOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const whatsappConversation = z.object({id: z.string(), phone_number: z.string().nullable().optional(), business_scoped_user_id: z.string().nullable().optional(), parent_business_scoped_user_id: z.string().nullable().optional(), username: z.string().nullable().optional(), status: z.enum(["active", "ended"]), last_active_at: z.string().optional(), created_at: z.string(), updated_at: z.string(), metadata: z.record(z.string(), z.unknown()).optional(), phone_number_id: z.string().nullable().optional(), kapso: z.object({contact_name: z.string().nullable().optional(), messages_count: z.number().int().gte(0).optional(), last_message_id: z.string().nullable().optional(), last_message_type: z.string().nullable().optional(), last_message_timestamp: z.string().optional(), last_message_text: z.string().nullable().optional(), last_inbound_at: z.string().optional(), last_outbound_at: z.string().optional()}).nullable().optional()});

export const paginationCursor = z.object({before: z.string().optional(), after: z.string().optional()});

export const paging = z.object({cursors: paginationCursor.optional(), next: z.string().nullable().optional(), previous: z.string().nullable().optional()});

export const whatsappConversationListResponse = z.object({data: z.array(whatsappConversation), paging: paging});

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 /whatsapp/conversations
 */
export const getApiWhatsappConversations = async (args: GetApiWhatsappConversationsArgs, options?: GetApiWhatsappConversationsOptions) => {
const {baseUrl = "https://api.kapso.ai/platform/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.phone_number_id != null) query.append("phone_number_id", String(args.phone_number_id))
if (args.phone_number != null) query.append("phone_number", String(args.phone_number))
if (args.status != null) query.append("status", String(args.status))
if (args.assigned_user_id != null) query.append("assigned_user_id", String(args.assigned_user_id))
if (args.unassigned != null) query.append("unassigned", String(args.unassigned))
if (args.created_after != null) query.append("created_after", String(args.created_after))
if (args.created_before != null) query.append("created_before", String(args.created_before))
if (args.last_active_after != null) query.append("last_active_after", String(args.last_active_after))
if (args.last_active_before != null) query.append("last_active_before", String(args.last_active_before))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.before != null) query.append("before", String(args.before))
if (args.after != null) query.append("after", String(args.after))
if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/whatsapp/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(whatsappConversationListResponse, await res.json())
};