import {z} from 'zod'

export type CreateApiApiFilesUploadUrlArgs = {body: {name: string, extension: string, size: number, contentType: string, attachEntityType: 'channel' | 'aptlet' | 'knowledge' | 'template', attachEntityId: string}};

export type CreateApiApiFilesUploadUrlOptions = {baseUrl?: string | undefined, ApiKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiApiFilesUploadUrlResponse = z.object({fileId: z.string().optional(), url: z.string().optional(), fields: z.record(z.string(), 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
};

/**
 * Get a presigned URL for a direct file upload
 * 
 * POST /api/files/upload-url
 * 
 * Also accepts auth: DelegateToken, PartnerBearer
 */
export const createApiApiFilesUploadUrl = async (args: CreateApiApiFilesUploadUrlArgs, options?: CreateApiApiFilesUploadUrlOptions) => {
const {baseUrl = "https://core-api.getaptly.com", fetch: fetchFn = fetch, ApiKeyHeader} = options ?? {}

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

if (ApiKeyHeader !== undefined) headers.set("x-token", ApiKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/api/files/upload-url${query.size > 0 ? `?${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(createApiApiFilesUploadUrlResponse, await res.json())
};