import {z} from 'zod'

export type GetApiMessagesArgs = {conversation_id: number, per_page?: number | undefined, cursor?: string | undefined};

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

export const messageContentType = z.enum(["Text", "Image", "Video", "Audio", "Document", "IgStoryReply", "IgStoryMention", "Unsupported"]);

export const senderType = z.enum(["User", "Consumer", "Metadata"]);

export const messageStatus = z.enum(["Sending", "Success", "Failed"]);

export const textMessageContent = z.string();

export const imageMessageContent = z.string();

export const videoMessageContent = z.object({url: z.string().optional(), file_name: z.string().nullable().optional()});

export const audioMessageContent = z.object({url: z.string().optional(), file_name: z.string().nullable().optional()});

export const documentMessageContent = z.object({url: z.string().optional(), file_name: z.string().nullable().optional()});

export const igStoryReplyMessageContent = z.object({url: z.string().optional(), content: z.string().optional(), content_type: z.enum(["Image", "Text"]).optional(), id: z.string().optional()});

export const igStoryMentionMessageContent = z.string();

export const unsupportedMessageContent = z.object({type: z.enum(["video", "audio", "unknown"]).optional()});

export const solvingMessageContent = z.literal("Solving");

export const reopeningMessageContent = z.literal("Reopening");

export const customChannelMessage = z.object({external_message_id: z.string().optional()});

export const message = z.object({id: z.number().int().optional(), conversation_id: z.number().int().optional(), date: z.string().optional(), content_type: messageContentType.optional(), sender_type: senderType.optional(), sender_label: z.string().nullable().optional(), status: messageStatus.optional(), is_deleted: z.boolean().optional(), is_automated: z.boolean().optional(), content: z.union([textMessageContent, imageMessageContent, videoMessageContent, audioMessageContent, documentMessageContent, igStoryReplyMessageContent, igStoryMentionMessageContent, unsupportedMessageContent, solvingMessageContent, reopeningMessageContent]).optional(), user_id: z.string().nullable().optional(), custom_channel: customChannelMessage.nullable().optional()});

export const count = z.number().int();

export const nextCursor = z.string().nullable();

export const getApiMessagesResponse = z.object({messages: z.array(message).optional(), count: count.optional(), next_cursor: nextCursor.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 messages
 * 
 * GET /messages
 */
export const getApiMessages = async (args: GetApiMessagesArgs, options?: GetApiMessagesOptions) => {
const {baseUrl = "https://api.partoo.co/v2", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.conversation_id != null) query.append("conversation_id", String(args.conversation_id))
if (args.per_page != null) query.append("per_page", String(args.per_page))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (ApiKeyAuth !== undefined) headers.set("x-APIKey", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/messages${query.size > 0 ? `?${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(getApiMessagesResponse, await res.json())
};