import {z} from 'zod'

export type GetApiCustomFieldsArgs = {entityType?: string | undefined};

export type GetApiCustomFieldsOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const apiFieldValue = z.union([z.object({type: z.literal("string"), value: z.string()}), z.object({type: z.literal("url"), value: z.string()}), z.object({type: z.literal("int"), value: z.number().int()}), z.object({type: z.literal("number"), value: z.number()}), z.object({type: z.literal("date"), value: z.string()}), z.object({type: z.literal("boolean"), value: z.boolean()})]);

export const apiCustomField = z.object({id: z.string(), name: z.string(), entityTypes: z.array(z.enum(["contact", "object", "organization"])), keyField: z.boolean(), valueType: z.enum(["string", "url", "int", "number", "date", "boolean"]), sampleValues: z.array(apiFieldValue).optional(), description: z.string().nullable().optional(), targetSubTypes: z.array(z.string()).optional(), providedBy: z.string().nullable().optional(), objectTypeId: z.string().optional()});

export const customFieldList = z.object({success: z.literal(true), data: z.array(apiCustomField)});

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 custom fields
 * 
 * GET /custom-fields
 */
export const getApiCustomFields = async (args: GetApiCustomFieldsArgs, options?: GetApiCustomFieldsOptions) => {
const {baseUrl = "https://api.commonroom.io/api/v2", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.entityType != null) query.append("entityType", String(args.entityType))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/custom-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(customFieldList, await res.json())
};