import {z} from 'zod'

export type GetApiEntitiesSegmentsIdPredictiveSegmentsGuessRuleAsyncArgs = {id: number};

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

export const functionExpression = z.union([z.object({function: z.enum(["+", "-", "*", "/"]), arg: z.number().optional()}), z.object({function: z.literal("replace"), search: z.string().optional(), replacement: z.string().nullable().optional()}), z.object({function: z.literal("substr"), start: z.number().optional(), length: z.number().optional()}), z.object({function: z.literal("regexp_extract"), pattern: z.string().optional(), group: z.number().optional()}), z.object({function: z.enum(["day_of_week", "from_iso8601_timestamp", "ln", "elapsed_days", "td_ip_to_least_specific_subdivision_name", "td_ip_to_country_name", "td_ip_to_city_name", "td_ip_to_connection_type", "td_ip_to_domain"])}), z.object({function: z.literal("cast_as_quantitative"), default: z.number()}), z.object({function: z.literal("cast_as_categorical"), default: z.string()}), z.object({function: z.literal("cast_as_categorical_array")}), z.object({function: z.literal("if"), op: z.enum([">", "<", "<=", ">=", "=", "!=", "is", "is\", "not"]).optional(), right_value: z.number().nullable().optional(), then: z.number().optional(), else: z.number().optional()})]);

export const predictiveSegmentPreprocessItem = z.object({column: z.string(), source: z.object({column: z.string().optional(), table: z.string().optional(), functions: z.array(functionExpression).optional()})});

export const predictiveSegmentRule = z.object({categoricalAsColumnNames: z.array(z.string()).optional(), categoricalArrayAsColumnNames: z.array(z.string()).optional(), quantitativeAsColumnNames: z.array(z.string()).optional(), preprocess: z.array(predictiveSegmentPreprocessItem).optional()});

export const entitiesSegmentPredictiveSegmentGuessRuleAsyncJsonApiResult = z.object({data: z.object({id: z.string().optional(), type: z.literal("predictive-segment-rule-guess-result").optional(), attributes: z.object({status: z.enum(["running", "success"]).optional(), rule: predictiveSegmentRule.optional()}).optional()}).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
};

/**
 * Retrieve predictive scoring rules
 * 
 * GET /entities/segments/{id}/predictive_segments/guess_rule_async
 */
export const getApiEntitiesSegmentsIdPredictiveSegmentsGuessRuleAsync = async (args: GetApiEntitiesSegmentsIdPredictiveSegmentsGuessRuleAsyncArgs, options?: GetApiEntitiesSegmentsIdPredictiveSegmentsGuessRuleAsyncOptions) => {
const {baseUrl = "https://api-cdp.treasuredata.com", fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/vnd.treasuredata.v1+json")

const url = `${baseUrl.replace(/\/+$/, '')}/entities/segments/${encodeURIComponent(String(args.id))}/predictive_segments/guess_rule_async${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(entitiesSegmentPredictiveSegmentGuessRuleAsyncJsonApiResult, await res.json())
};