import {z} from 'zod'

export type CreateApiCustomformPreviewArgs = {body: Record<string, never>};

export type CreateApiCustomformPreviewOptions = {baseUrl?: string | undefined, basic?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const createApiCustomformPreviewResponse = z.object({response: z.object({node: z.string().optional(), data: z.array(z.object({layout: z.string().nullable().optional(), workflow: z.object({workflowStatus: z.string().optional(), isSelectStepOnDeny: z.string().optional(), type: z.string().optional(), steps: z.array(z.object({reason: z.string().optional(), reasons: z.array(z.string()).optional(), isUserApprover: z.string().optional(), userGroupNames: z.array(z.unknown()).nullable().optional(), type: z.string().optional(), minApprovalsForGroups: z.array(z.unknown()).nullable().optional(), isPostStepLogicFailed: z.boolean().nullable().optional(), postStepLogicName: z.string().optional(), id: z.string().optional(), executedByNames: z.array(z.object({})).optional(), userLoginNames: z.array(z.string()).optional(), userGroupTypedId: z.string().nullable().optional(), approvalRequiredEmailAttachments: z.array(z.object({})).optional(), subSteps: z.array(z.object({approver: z.string().optional(), approverLoginName: z.string().optional(), approverTypedId: z.string().optional(), executionStatus: z.string().nullable().optional(), lastExecutedBy: z.string().nullable().optional(), lastExecutedByName: z.string().optional(), approvedCount: z.number().int().optional(), minApprovalsNeeded: z.number().int().optional(), reason: z.string().optional(), comment: z.string().nullable().optional(), comments: z.object({}).nullable().optional(), lastExecutionDate: z.string().nullable().optional()})).optional(), executionStatus: z.string().optional(), userTypedIds: z.array(z.string()).optional(), lastAccess: z.string().optional(), minApprovalsNeeded: z.number().int().optional(), userName: z.string().optional(), delegatedToTypedIds: z.array(z.object({})).optional(), userGroupTypedIds: z.array(z.unknown()).nullable().optional(), userTypedId: z.string().optional(), uniqueName: z.string().optional(), denialReasons: z.array(z.object({})).optional(), userGroupName: z.string().nullable().optional(), isDenialReasonOptional: z.string().optional(), userNames: z.array(z.string()).optional(), comment: z.string().nullable().optional(), mandatoryComments: z.object({}).nullable().optional()})).optional(), approvableTypedId: z.string().optional(), currentStepId: z.string().optional(), submitReason: z.string().nullable().optional(), submitterUserName: z.string().nullable().optional(), denialReasons: z.array(z.object({})).optional(), submitterTypedId: z.string().nullable().optional(), isDenialReasonOptional: z.string().optional(), id: z.string().optional(), isAddStepRestrictedToWFAdmin: z.string().optional()}).optional(), resultType: z.string().optional()})).optional(), status: z.number().int().optional()}).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
};

/**
 * Preview a Custom Form Workflow
 * 
 * POST /customform.preview
 * 
 * Also accepts auth: X-PriceFx-jwt
 */
export const createApiCustomformPreview = async (args: CreateApiCustomformPreviewArgs, options?: CreateApiCustomformPreviewOptions) => {
const {baseUrl = "https://companynode.pricefx.com/pricefx/companypartition", fetch: fetchFn = fetch, basic} = options ?? {}

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

if (basic !== undefined) headers.set('authorization', `Basic ${btoa(`${basic.username}:${basic.password}`)}`)

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