import {z} from 'zod'

export type GetApiCalculationSlugArgs = {slug: string, access_token?: (string | null) | undefined};

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

export const task = z.enum(["energy", "gradient", "optimize", "optimize_ts", "charge", "spin_density", "dipole", "hessian", "frequencies", "stress", "band_structure", "elastic_tensor"]);

export const appSchemasCalculationCalculation = z.object({name: z.string().nullable().optional(), workflow_uuid: z.string().nullable().optional(), created_at: z.string(), updated_at: z.string().nullable().optional(), started_at: z.string().nullable().optional(), uuid: z.string(), status: z.number().int(), elapsed: z.number().nullable().optional(), completed_at: z.string().nullable().optional(), settings: z.object({}), tasks: z.array(task).nullable().optional(), engine: z.string().nullable().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
};

/**
 * Read Calculation
 * 
 * GET /calculation/{slug}
 */
export const getApiCalculationSlug = async (args: GetApiCalculationSlugArgs, options: GetApiCalculationSlugOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
const cookies: string[] = []
headers.set('accept', "application/json")

if (args.access_token != null) cookies.push("access_token=" + encodeURIComponent(String(args.access_token)))
if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)
if (cookies.length > 0) headers.set('cookie', cookies.join('; '))

const url = `${baseUrl.replace(/\/+$/, '')}/calculation/${encodeURIComponent(String(args.slug))}${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(appSchemasCalculationCalculation, await res.json())
};