import {z} from 'zod'

export type GetApiV1FieldsArgs = {category: 'AGENT' | 'ATTACHMENT' | 'CONTACT' | 'CUSTOMER' | 'SERVICE_PRODUCT' | 'INVENTORY' | 'INVENTORY_TYPE' | 'LINE' | 'NOTE' | 'ORDER' | 'PRODUCT' | 'REQUEST_SERVICE' | 'TASK' | 'TICKET', type_id?: number | undefined};

export type GetApiV1FieldsOptions = {baseUrl?: string | undefined, basic?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const revAppComponentsLink = z.object({rel: z.string().optional(), href: z.string().optional()});

export const revAppModelsField = z.object({field_id: z.number().int().optional(), label: z.string().optional(), description: z.string().optional(), default_value: z.string().optional(), required: z.string().optional(), links: z.array(revAppComponentsLink).optional()});

export const revAppModelsFieldResult = z.object({Fields: z.array(revAppModelsField).optional(), links: z.array(revAppComponentsLink).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
};

/**
 * View defined custom fields.
 * 
 * GET /v1/Fields
 */
export const getApiV1Fields = async (args: GetApiV1FieldsArgs, options?: GetApiV1FieldsOptions) => {
const {baseUrl = "https://restapi.rev.io", fetch: fetchFn = fetch, basic} = options ?? {}

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

if (args.category != null) query.append("category", String(args.category))
if (args.type_id != null) query.append("type_id", String(args.type_id))
if (basic !== undefined) headers.set('authorization', `Basic ${btoa(`${basic.username}:${basic.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/Fields${query.size > 0 ? `?${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(revAppModelsFieldResult, await res.json())
};