import {z} from 'zod'

export type GetApiExperimentalFlowDraftsOptions = {baseUrl?: string | undefined, OAuth10?: string | undefined, fetch?: typeof fetch | undefined};

export const userName = z.string();

export const messageName = z.string();

export const notifyMethods = z.object({email: messageName.optional(), sms: messageName.optional(), "email-link-only": z.boolean().optional()});

export const notifyKind = z.enum(["standard", "confirmation"]);

export const notifyDetails = z.object({users: z.array(userName), methods: notifyMethods, kind: notifyKind.optional()});

export const notifyAction = z.object({notify: notifyDetails});

export const documentName = z.string();

export const allowViewingDetails = z.object({users: z.array(userName), documents: z.array(documentName)});

export const allowViewingAction = z.object({"allow-viewing": allowViewingDetails});

export const denyViewingDetails = z.object({users: z.array(userName), documents: z.array(documentName)});

export const denyViewingAction = z.object({"deny-viewing": denyViewingDetails});

export const callbackName = z.string().max(128);

export const callbackDetails = z.object({"callback-name": callbackName});

export const callbackAction = z.object({callback: callbackDetails});

export const systemAction = z.union([notifyAction, allowViewingAction, denyViewingAction, callbackAction]);

export const approvedBy = z.object({documents: z.array(documentName), users: z.array(userName)});

export const approvedByGroupOf = z.object({"required-approvals": z.number().int().gte(0).lte(18446744073709552000), documents: z.array(documentName), users: z.array(userName)});

export const signedBy = z.object({documents: z.array(documentName), users: z.array(userName)});

export const signedByGroupOf = z.object({"required-signatures": z.number().int().gte(0).lte(18446744073709552000), documents: z.array(documentName), users: z.array(userName)});

export const viewedBy = z.object({documents: z.array(documentName), users: z.array(userName)});

export const url = z.string();

export const redirectTo = z.object({users: z.array(userName), url: url});

export const expect = z.object({"approved-by": approvedBy.optional(), "approved-by-group-of": approvedByGroupOf.optional(), "signed-by": signedBy.optional(), "signed-by-group-of": signedByGroupOf.optional(), "viewed-by": viewedBy.optional(), "redirect-to": redirectTo.optional()});

export const flowDSLStageRegular = z.record(z.string(), z.object({actions: z.array(systemAction), expect: expect}));

export const confirmationAction = z.object({notify: z.object({users: z.array(userName), methods: notifyMethods, kind: z.literal("confirmation")})});

export const flowDSLStageConfirmation = z.record(z.string(), z.object({actions: z.array(confirmationAction), expect: z.object({})}));

export const flowDSLStage = z.union([flowDSLStageRegular, flowDSLStageConfirmation]);

export const dslVersion = z.string();

export const allowRejections = z.boolean();

export const timeOfDay = z.string();

export const reminderRelativeTime = z.object({time_of_day: timeOfDay, time_zone: z.string()});

export const reminderRepeat = z.enum(["never", "periodically"]);

export const reminderDate = z.union([z.object({type: z.literal("absolute"), date_time: z.string()}), z.object({type: z.literal("relative"), days_delay: z.number().int().gte(1).lte(365), time: reminderRelativeTime.optional(), repeat: reminderRepeat.optional()})]);

export const automaticReminderMethod = z.enum(["email", "sms", "email-and-sms"]);

export const automaticReminder = z.object({"user-name": userName, date: reminderDate, method: automaticReminderMethod});

export const flowDSL = z.object({stages: z.array(flowDSLStage), "dsl-version": dslVersion, "allow-rejections": allowRejections.optional(), "automatic-reminders": z.array(automaticReminder).optional()});

export const callbackUrl = z.string();

export const authMethod = z.union([z.object({type: z.literal("basic"), user: z.string(), password: z.string()}), z.object({type: z.literal("none")})]);

export const callbackVersion = z.literal("v1");

export const callback = z.object({url: callbackUrl, auth: authMethod.optional(), version: callbackVersion});

export const uTCTime = z.string();

export const userID = z.string();

export const folderID = z.string();

export const draftsListItem = z.object({id: z.string(), title: z.string().optional(), process: flowDSL.optional(), callback: callback.optional(), created: uTCTime, author_id: userID, folder_id: folderID});

export const getApiExperimentalFlowDraftsResponse = z.array(draftsListItem);

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
};

/**
 * List Flow drafts
 * 
 * GET /experimental/flow/drafts
 * 
 * Also accepts auth: OAuth2.0, SessionCookie + XToken
 */
export const getApiExperimentalFlowDrafts = async (options?: GetApiExperimentalFlowDraftsOptions) => {
const {baseUrl = "https://scrive.com", fetch: fetchFn = fetch, OAuth10} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json;charset=utf-8")

if (OAuth10 !== undefined) headers.set('authorization', `oauth1 ${OAuth10}`)

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

const res = await fetchFn(url, {method: "GET", headers})

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

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