import {z} from 'zod'

export type WizardAPIRequest = {key: string, action?: ('switch-login-tabs' | 'back' | 'poll' | 'change-language' | 'abort' | 'complete-bankcodes') | undefined} | {[key: string]: string};

export type CreateApiWizardArgs = {body: WizardAPIRequest};

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

export const polling = z.object({interval: z.number().int().optional()});

export const formCaptcha = z.object({type: z.string().optional(), name: z.string().optional(), data: z.string().optional(), value: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formCheckbox = z.object({type: z.string().optional(), name: z.string().optional(), checked: z.boolean().optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formFlicker = z.object({type: z.string().optional(), name: z.string().optional(), value: z.string().optional(), code: z.array(z.array(z.string())).optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formHelpText = z.object({type: z.string().optional(), title: z.string().optional(), text: z.string().optional()});

export const formImage = z.object({type: z.string().optional(), data: z.string().optional(), label: z.string().optional()});

export const formPassword = z.object({type: z.string().optional(), name: z.string().optional(), value: z.string().optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formRadioOption = z.object({label: z.string().optional(), disabled: z.boolean().optional()});

export const formRadio = z.object({type: z.string().optional(), name: z.string().optional(), checked: z.string().optional(), options: z.array(formRadioOption).optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formSelect = z.object({type: z.string().optional(), name: z.string().optional(), selected: z.string().optional(), options: z.object({}).optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formTabs = z.object({type: z.string().optional(), name: z.string().optional(), tabs: z.array(z.string()).optional(), label: z.string().optional(), selected: z.string().optional()});

export const formText = z.object({type: z.string().optional(), name: z.string().optional(), value: z.string().optional(), label: z.string().optional(), validation: z.string().optional(), invalid: z.boolean().optional(), failed_validation_rules: z.string().optional(), validation_error: z.string().optional()});

export const formMultiElements = z.object({label: z.string().optional(), value: z.string().optional(), elements: z.array(z.union([formCaptcha, formCheckbox, formFlicker, formHelpText, formImage, formPassword, formRadio, formSelect, formTabs, formText])).optional()});

export const formMulti = z.object({type: z.string().optional(), name: z.string().optional(), selected: z.string().optional(), elements: z.array(formMultiElements).optional()});

export const formObject = z.object({name: z.string().optional(), elements: z.array(z.union([formCaptcha, formCheckbox, formFlicker, formHelpText, formImage, formMulti, formMultiElements, formPassword, formRadio, formSelect, formTabs, formText])).optional()});

export const wizardResponse = z.object({code: z.number().int().optional(), message: z.string().optional(), error: z.array(z.string()).optional(), polling: polling.optional(), form: formObject.optional()});

export const wizardFinalResponse = z.object({code: z.number().int().optional(), error: z.array(z.string()).optional(), form: z.object({elements: z.array(z.string()).optional(), name: z.string().optional(), parameters: z.array(z.string()).optional()}).optional(), message: z.string().optional(), polling: z.object({}).optional()});

export const createApiWizardResponse = z.union([wizardResponse, wizardFinalResponse]);

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
};

/**
 * Navigate through the Wizard without xs2a.js
 * 
 * POST /wizard
 */
export const createApiWizard = async (args: CreateApiWizardArgs, options?: CreateApiWizardOptions) => {
const {baseUrl = "https://api.xs2a.com/v1.1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

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

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