import {z} from 'zod'

export type ExtraMetadataFieldType = 'string' | 'number' | 'boolean';

export type ExtraMetadataField = {description?: (string | null) | undefined, name: string, type: ExtraMetadataFieldType};

export type LlmJudgeScorerParams = {extra_metadata_fields?: (Array<ExtraMetadataField> | null) | undefined, include_reasoning?: (boolean | null) | undefined, max_tokens?: (number | null) | undefined, model?: (string | null) | undefined, output_parsing?: (string | null) | undefined, provider_id: string, temperature?: (number | null) | undefined, timeout_ms?: (number | null) | undefined};

export type RemoteScorerAuth = {type: 'none'} | {token: string, type: 'bearer'} | {password: string, type: 'basic', username: string} | {header_name: string, token: string, type: 'api_key'};

export type RemoteScorerHeader = {key: string, value: string};

export type RemoteScorerParams = {auth?: (RemoteScorerAuth | null) | undefined, content_type?: (string | null) | undefined, custom_headers?: (Array<RemoteScorerHeader> | null) | undefined, endpoint: string, http_method?: (string | null) | undefined, max_retries?: (number | null) | undefined, timeout_ms?: (number | null) | undefined};

export type ScorerCreateConfig = {outputSchema: unknown, params: LlmJudgeScorerParams, producesScoreConfigId?: (string | null) | undefined, producesScoreConfigVersion?: (number | null) | undefined, template: string, type: 'llm_judge'} | {params: RemoteScorerParams, producesScoreConfigId?: (string | null) | undefined, producesScoreConfigVersion?: (number | null) | undefined, template: string, type: 'remote'};

export type CreateApiApiOrgIdScorersArgs = {org_id: string, body: {description?: (string | null) | undefined, name: string, scorer: ScorerCreateConfig}};

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

export const createApiApiOrgIdScorersResponse = z.object({createdAt: z.number().int(), description: z.string().nullable().optional(), entityId: z.string(), id: z.string(), isActive: z.boolean(), name: z.string(), orgId: z.string(), outputSchema: z.unknown(), params: z.unknown(), producesScoreConfigId: z.string().nullable().optional(), producesScoreConfigVersion: z.number().int().nullable().optional(), referenceBased: z.boolean(), scorerType: z.string(), template: z.string(), updatedAt: z.number().int(), variables: z.array(z.string()), version: z.number().int()});

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 scorer (v1)
 * 
 * POST /api/{org_id}/scorers
 */
export const createApiApiOrgIdScorers = async (args: CreateApiApiOrgIdScorersArgs, options: CreateApiApiOrgIdScorersOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.org_id))}/scorers${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(createApiApiOrgIdScorersResponse, await res.json())
};