import {z} from 'zod'

export type ExperimentMode = 'mle_agent' | 'auto_agent';

export type ExperimentCreateRequest = {project_id: string, title?: (string | null) | undefined, mode?: ExperimentMode | undefined, requires_clarification?: boolean | undefined};

export type CreateApiV1ExperimentsArgs = {body: ExperimentCreateRequest};

export type CreateApiV1ExperimentsOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const experimentMode = z.enum(["mle_agent", "auto_agent"]);

export const experimentStage = z.enum(["scoping", "preparing_data", "training", "evaluating", "complete", "blocked", "cancelled"]);

export const experimentCompletionOutcome = z.enum(["incumbent_retained", "candidate_promoted"]);

export const experimentAssetSummary = z.object({active_job_count: z.number().int().gte(0), total_job_count: z.number().int().gte(0), failed_job_count: z.number().int().gte(0), dataset_count: z.number().int().gte(0), evaluation_count: z.number().int().gte(0), base_models: z.array(z.string()), base_models_truncated: z.boolean(), last_activity_at: z.string(), category_label: z.string().max(120).nullable().optional(), last_agent_message: z.string().max(241).nullable().optional(), agent_step_count: z.number().int().gte(0).nullable().optional(), agent_turn_active: z.boolean()});

export const experimentResponse = z.object({id: z.string(), project_id: z.string(), project_version_id: z.string().nullable(), team_id: z.string(), session_id: z.string().nullable().optional(), created_by: z.string(), title: z.string().nullable(), mode: experimentMode, stage: experimentStage, mode_locked_at: z.string().nullable(), last_activity_at: z.string(), completed_at: z.string().nullable(), completion_outcome: experimentCompletionOutcome.nullable().optional(), cancelled_at: z.string().nullable(), created_at: z.string(), updated_at: z.string(), summary: experimentAssetSummary});

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
};

/**
 * Create an Experiment and transcript session
 * 
 * POST /v1/experiments
 * 
 * Also accepts auth: BearerAuth
 */
export const createApiV1Experiments = async (args: CreateApiV1ExperimentsArgs, options: CreateApiV1ExperimentsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

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