import {z} from 'zod'

export type EmailAddressTemplate = {email: string, name?: (string | null) | undefined};

export type RenderRequest = {to?: Array<EmailAddressTemplate> | undefined, cc?: Array<EmailAddressTemplate> | undefined, bcc?: Array<EmailAddressTemplate> | undefined, parent_email?: string | undefined, document_list?: Array<string> | undefined, annotation_list?: Array<string> | undefined, template_values?: Record<string, never> | undefined};

export type CreateApiApiV1EmailTemplatesEmailTemplateIDRenderArgs = {emailTemplateID: number, body: RenderRequest};

export type CreateApiApiV1EmailTemplatesEmailTemplateIDRenderOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const emailAddress = z.object({email: z.string(), name: z.string().nullable().optional()});

export const renderResponse = z.object({to: z.array(emailAddress).optional(), cc: z.array(emailAddress).optional(), bcc: z.array(emailAddress).optional(), subject: z.string().optional(), message: z.string().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
};

/**
 * Render email template
 * 
 * POST /api/v1/email_templates/{emailTemplateID}/render
 */
export const createApiApiV1EmailTemplatesEmailTemplateIDRender = async (args: CreateApiApiV1EmailTemplatesEmailTemplateIDRenderArgs, options?: CreateApiApiV1EmailTemplatesEmailTemplateIDRenderOptions) => {
const {baseUrl = "https://example.rossum.app", 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 = `${baseUrl.replace(/\/+$/, '')}/api/v1/email_templates/${encodeURIComponent(String(args.emailTemplateID))}/render${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(renderResponse, await res.json())
};