import {z} from 'zod'

export type LM = {model: string, kwargs?: ({[key: string]: unknown} | null) | undefined};

export type GepaKwargs = {auto?: ('light' | 'medium' | 'heavy' | null) | undefined, max_full_evals?: (number | null) | undefined, max_metric_calls?: (number | null) | undefined, reflection_minibatch_size?: number | undefined, candidate_selection_strategy?: ('pareto' | 'current_best') | undefined, reflection_lm?: (LM | null) | undefined, skip_perfect_score?: boolean | undefined, add_format_failure_as_feedback?: boolean | undefined, component_selector?: ('round_robin' | 'all') | undefined, use_merge?: boolean | undefined, max_merge_invocations?: (number | null) | undefined, seed?: (number | null) | undefined, gepa_kwargs?: ({[key: string]: unknown} | null) | undefined};

export type GepaJobRequest = {arbiter_repo: string, arbiter_revision?: string | undefined, push_branch?: string | undefined, push_tag?: (string | null) | undefined, gepa_kwargs?: GepaKwargs | undefined};

export type CreateApiApiV1JobsGepaArgs = {authorization?: (string | null) | undefined, modaic_session?: (string | null) | undefined, body: GepaJobRequest};

export type CreateApiApiV1JobsGepaOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const createApiApiV1JobsGepaResponse = z.unknown();

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
};

/**
 * Start Optimization Job
 * 
 * POST /api/v1/jobs/gepa
 */
export const createApiApiV1JobsGepa = async (args: CreateApiApiV1JobsGepaArgs, options: CreateApiApiV1JobsGepaOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.authorization != null) headers.set("authorization", String(args.authorization))
if (args.modaic_session != null) cookies.push("modaic_session=" + encodeURIComponent(String(args.modaic_session)))
if (cookies.length > 0) headers.set('cookie', cookies.join('; '))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/jobs/gepa${query.size > 0 ? `?${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(createApiApiV1JobsGepaResponse, await res.json())
};