import {z} from 'zod'

export type DemInferredJourneyStatus = 'candidate' | 'ignored';

export type GetApiApiV2DemJourneysInferredSearchArgs = {status?: DemInferredJourneyStatus | undefined, q?: string | undefined, app_id?: string | undefined};

export type GetApiApiV2DemJourneysInferredSearchOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const demRumNode = z.object({app_id: z.string().optional(), id: z.string().optional(), query: z.string()});

export const demRumNodes = z.array(demRumNode);

export const demRumStepType = z.enum(["start", "stop", "step"]);

export const demRumStep = z.object({nodes: demRumNodes, type: demRumStepType});

export const demRumSteps = z.array(demRumStep);

export const demVariant = z.object({filter: z.string().optional(), id: z.string().optional(), name: z.string(), rum_steps: demRumSteps});

export const demVariants = z.array(demVariant);

export const demJourneyRum = z.object({filter: z.string().optional(), rum_steps: demRumSteps, variants: demVariants.optional()});

export const demTags = z.array(z.string());

export const demTestSuiteNested = z.object({id: z.string(), name: z.string()});

export const demInferredJourneyCandidateAttributes = z.object({created_at: z.string(), description: z.string().nullable().optional(), journey_rum: demJourneyRum, name: z.string(), org_id: z.number().int(), rank: z.number().int().nullable().optional(), tags: demTags, test_suite: demTestSuiteNested.optional(), variants: demVariants});

export const demJourneyType = z.literal("journeys");

export const demInferredJourneyCandidateData = z.object({attributes: demInferredJourneyCandidateAttributes, id: z.string(), type: demJourneyType});

export const demInferredJourneyIgnoredAttributes = z.object({created_at: z.string(), description: z.string().nullable().optional(), ignored_at: z.string(), journey_rum: demJourneyRum, name: z.string(), org_id: z.number().int(), tags: demTags, test_suite: demTestSuiteNested.optional(), variants: demVariants});

export const demInferredJourneyIgnoredData = z.object({attributes: demInferredJourneyIgnoredAttributes, id: z.string(), type: demJourneyType});

export const demInferredJourneyItem = z.union([demInferredJourneyCandidateData, demInferredJourneyIgnoredData]);

export const demSearchInferredJourneysResponse = z.object({data: z.array(demInferredJourneyItem)});

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
};

/**
 * Search inferred DEM journeys
 * 
 * GET /api/v2/dem/journeys/inferred/search
 * 
 * Also accepts auth: AuthZ
 */
export const getApiApiV2DemJourneysInferredSearch = async (args: GetApiApiV2DemJourneysInferredSearchArgs, options?: GetApiApiV2DemJourneysInferredSearchOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (args.status != null) query.append("status", String(args.status))
if (args.q != null) query.append("q", String(args.q))
if (args.app_id != null) query.append("app_id", String(args.app_id))
if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/dem/journeys/inferred/search${query.size > 0 ? `?${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(demSearchInferredJourneysResponse, await res.json())
};