import {z} from 'zod'

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

export const second = z.object({});

export const third = z.object({});

export const relation = z.union([second, third]);

export const nonEmptyListIdentifier = z.object({head: z.string(), tail: z.array(z.string()).optional()});

export const inheritance = z.object({workspaceId: z.string()});

export const active = z.object({});

export const creating = z.object({});

export const nonEmptyListString = z.object({head: z.string(), tail: z.array(z.string()).optional()});

export const error = z.object({errors: nonEmptyListString});

export const failure = z.object({});

export const updating = z.object({});

export const state = z.union([active, creating, error, failure, updating]);

export const group = z.object({id: z.string()});

export const serviceAccount = z.object({id: z.string()});

export const user = z.object({id: z.string()});

export const principal = z.union([group, serviceAccount, user]);

export const permissions = z.object({read: z.array(principal).optional(), write: z.array(principal).optional(), sync: z.array(principal).optional()});

export const active1 = z.object({bucket: z.string(), permissions: permissions});

export const bespoke = z.object({});

export const creating1 = z.object({permissions: permissions});

export const liveRamp3P = z.object({});

export const principalError = z.object({bucket: z.string(), permissions: permissions, errors: nonEmptyListString});

export const realtimeAPI = z.object({});

export const setupFailure = z.object({bucket: z.string().optional(), permissions: permissions});

export const updating1 = z.object({bucket: z.string(), permissions: permissions});

export const v1 = z.object({advertiserName: z.string(), organizationId: z.string()});

export const v11 = z.object({organizationId: z.string()});

export const dataSource = z.union([active1, bespoke, creating1, liveRamp3P, principalError, realtimeAPI, setupFailure, updating1, v1, v11]);

export const detailsDataSource = z.object({id: z.string(), state: state, details: dataSource});

export const importDataSource = z.object({id: z.string(), name: z.string(), code: z.string(), relation: relation, identifiers: nonEmptyListIdentifier, inheritance: inheritance.optional(), source: detailsDataSource});

export const wrappedResponseImportDataSource = z.object({items: z.array(importDataSource).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
};

/**
 * Get all 2nd party data imports
 * 
 * GET /imports
 */
export const getApiImports = async (options?: GetApiImportsOptions) => {
const {baseUrl = "https://api.permutive.app", fetch: fetchFn = fetch} = options ?? {}

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

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