import {z} from 'zod'

export type MessageType = 'audio' | 'contacts' | 'document' | 'hsm' | 'image' | 'location' | 'text' | 'video' | 'voice' | 'unknown';

export type Text = {body: string};

export type Provider = {name: string};

export type Audio = {id: string} | {provider: Provider, link: string};

export type Image = {caption: string, id: string} | {provider: Provider, link: string, caption: string};

export type Document = {caption: string, id: string, filename: string} | {provider: Provider, caption: string, link: string, filename: string};

export type Video = {caption: string, id: string} | {provider: Provider, caption: string, link: string};

export type Language = {policy: 'fallback' | 'deterministic', code: string};

export type Currency = {currency_code: string, amount_1000: number};

export type DateTimeComponent = {day_of_week?: number | undefined, day_of_month?: number | undefined, year?: number | undefined, month?: number | undefined, hour?: number | undefined, minute?: number | undefined};

export type DateTimeUnixEpoch = {timestamp?: number | undefined};

export type DateTimeObject = {component?: DateTimeComponent | undefined, unix_epoch?: DateTimeUnixEpoch | undefined};

export type LocalizableParam = {default: string, currency?: Currency | undefined, date_time?: DateTimeObject | undefined};

export type Hsm = {namespace: string, element_name: string, language: Language, localizable_params: Array<LocalizableParam>};

export type Address = {city: string, country: string, country_code: string, state: string, street: string, type: string, zip: string};

export type Email = {email: string, type: string};

export type Name = {first_name?: string | undefined, formatted_name: string, last_name?: string | undefined, suffix?: string | undefined, prefix?: string | undefined};

export type Org = {company: string, department?: string | undefined, title?: string | undefined};

export type Phone = {phone?: string | undefined, type?: string | undefined, wa_id?: string | undefined};

export type Url = {url?: string | undefined, type?: string | undefined};

export type Contact = {addresses?: Array<Address> | undefined, birthday?: string | undefined, emails?: Array<Email> | undefined, ims?: Array<string> | undefined, name?: Name | undefined, org?: Org | undefined, phones?: Array<Phone> | undefined, urls?: Array<Url> | undefined};

export type Location = {longitude: string, latitude: string, name: string, address: string};

export type SendMessageRequestBody = {to: string, type?: MessageType | undefined, recipient_type?: ('individual' | 'group') | undefined, text?: Text | undefined, audio?: Audio | undefined, image?: Image | undefined, document?: Document | undefined, video?: Video | undefined, hsm?: Hsm | undefined, ttl?: Record<string, never> | undefined, contacts?: Array<Contact> | undefined, location?: Location | undefined, preview_url?: boolean | undefined};

export type CreateApiMessagesArgs = {body: SendMessageRequestBody};

export type CreateApiMessagesOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const meta = z.object({version: z.string().optional(), api_status: z.enum(["deprecated", "experimental", "stable"]).optional()});

export const error = z.object({code: z.number().int().optional(), title: z.string().optional(), details: z.string().optional(), href: z.string().optional()});

export const message = z.object({id: z.string().optional()});

export const messageResponse = z.object({meta: meta.optional(), errors: z.array(error).optional(), messages: z.array(message).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
};

/**
 * Send-Message
 * 
 * POST /messages
 */
export const createApiMessages = async (args: CreateApiMessagesArgs, options?: CreateApiMessagesOptions) => {
const {baseUrl = "http://example.com/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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