import {z} from 'zod'

export type Format = 'a0' | 'a1' | 'a2' | 'a3' | 'a4' | 'a5' | 'a6';

export type Orientation = 'landscape' | 'portrait';

export type Margin = {top?: (string | null) | undefined, bottom?: (string | null) | undefined, left?: (string | null) | undefined, right?: (string | null) | undefined};

export type PDFOptions = {format?: Format | undefined, orientation?: Orientation | undefined, scale?: number | undefined, margin?: (Margin | null) | undefined};

export type AllowedHTTPMethods = 'PUT' | 'POST';

export type PresignedUploadRequest = {url: string, method?: AllowedHTTPMethods | undefined};

export type RenderPDFRequest = {template_html: string, header_template?: (string | null) | undefined, footer_template?: (string | null) | undefined, pdf?: PDFOptions | undefined, presigned_upload?: (PresignedUploadRequest | null) | undefined};

export type CreateApiPdfGeneratorRenderArgs = {body: RenderPDFRequest};

export type CreateApiPdfGeneratorRenderOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiPdfGeneratorRenderResponse = z.unknown();

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 Pdf
 * 
 * POST /pdf-generator/render
 */
export const createApiPdfGeneratorRender = async (args: CreateApiPdfGeneratorRenderArgs, options?: CreateApiPdfGeneratorRenderOptions) => {
const {baseUrl = "https://api.doqs.dev/v1", fetch: fetchFn = fetch, apiKeyAuth} = options ?? {}

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

if (apiKeyAuth !== undefined) headers.set("x-api-key", apiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/pdf-generator/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(createApiPdfGeneratorRenderResponse, await res.json())
};