import {z} from 'zod'

export type ProductAnalyticsJourneyFunnelCompute = {aggregation?: string | undefined, metric?: string | undefined};

export type QuerySortOrder = 'asc' | 'desc';

export type ProductAnalyticsGroupBySort = {aggregation?: string | undefined, metric?: string | undefined, order?: QuerySortOrder | undefined};

export type ProductAnalyticsGraphQueryGroupBySource = 'product_analytics_audience_filters.users' | 'product_analytics_audience_filters.accounts';

export type ProductAnalyticsJourneyNodeTargetType = 'node';

export type ProductAnalyticsJourneyNodeTarget = {type: ProductAnalyticsJourneyNodeTargetType, value: string};

export type ProductAnalyticsJourneyPathTargetType = 'path';

export type ProductAnalyticsJourneyPathTarget = {end: string, start: string, type: ProductAnalyticsJourneyPathTargetType};

export type ProductAnalyticsJourneyTarget = ProductAnalyticsJourneyNodeTarget | ProductAnalyticsJourneyPathTarget;

export type ProductAnalyticsGraphQueryGroupBy = {facet: string, limit?: number | undefined, should_exclude_missing?: boolean | undefined, sort?: ProductAnalyticsGroupBySort | undefined, source?: ProductAnalyticsGraphQueryGroupBySource | undefined, target?: ProductAnalyticsJourneyTarget | undefined, value_filters?: Array<string> | undefined};

export type ProductAnalyticsJourneyAudienceAccountQuery = {name: string, query?: string | undefined};

export type ProductAnalyticsJourneyAudienceSegmentQuery = {name: string, segment_id: string};

export type ProductAnalyticsJourneyAudienceUserQuery = {name: string, query?: string | undefined};

export type ProductAnalyticsJourneyAudienceFilters = {accounts?: Array<ProductAnalyticsJourneyAudienceAccountQuery> | undefined, formula?: string | undefined, segments?: Array<ProductAnalyticsJourneyAudienceSegmentQuery> | undefined, users?: Array<ProductAnalyticsJourneyAudienceUserQuery> | undefined};

export type ProductAnalyticsJourneySearchGraphFilterName = '__dd.time_to_convert' | '__dd.session' | '__dd.dropoff_rate';

export type ProductAnalyticsJourneySearchGraphFilterOperator = '=' | '<' | '>' | '<=' | '>=';

export type ProductAnalyticsJourneySearchGraphFilter = {name: ProductAnalyticsJourneySearchGraphFilterName, operator: ProductAnalyticsJourneySearchGraphFilterOperator, target?: ProductAnalyticsJourneyTarget | undefined, value: number};

export type ProductAnalyticsJourneySearchFilters = {audience_filters?: ProductAnalyticsJourneyAudienceFilters | undefined, graph_filters?: Array<ProductAnalyticsJourneySearchGraphFilter> | undefined, string_filter?: string | undefined};

export type ProductAnalyticsJoinKeys = {primary?: string | undefined, secondary?: Array<string> | undefined};

export type ProductAnalyticsEventQueryDataSource = 'product_analytics';

export type ProductAnalyticsEventSearch = {query?: string | undefined};

export type ProductAnalyticsEventQuery = {data_source: ProductAnalyticsEventQueryDataSource, search: ProductAnalyticsEventSearch};

export type ProductAnalyticsOccurrenceQueryDataSource = 'product_analytics_occurrence';

export type ProductAnalyticsOccurrenceFilter = {meta?: {[key: string]: string} | undefined, operator: string, value: string};

export type ProductAnalyticsOccurrenceSearch = {occurrences?: ProductAnalyticsOccurrenceFilter | undefined, query?: string | undefined};

export type ProductAnalyticsOccurrenceQuery = {data_source: ProductAnalyticsOccurrenceQueryDataSource, search: ProductAnalyticsOccurrenceSearch};

export type ProductAnalyticsBaseQuery = ProductAnalyticsEventQuery | ProductAnalyticsOccurrenceQuery;

export type ProductAnalyticsJourneySearch = {expression: string, filters?: ProductAnalyticsJourneySearchFilters | undefined, join_keys?: ProductAnalyticsJoinKeys | undefined, node_objects: {[key: string]: ProductAnalyticsBaseQuery}};

export type ProductAnalyticsJourneyFunnelQuery = {compute?: ProductAnalyticsJourneyFunnelCompute | undefined, group_by?: Array<ProductAnalyticsGraphQueryGroupBy> | undefined, search: ProductAnalyticsJourneySearch};

export type ProductAnalyticsJourneyFunnelRequestAttributes = {exclude_anonymous_traffic?: boolean | undefined, from: number, query: ProductAnalyticsJourneyFunnelQuery, to: number};

export type ProductAnalyticsJourneyRequestType = 'journey_request';

export type ProductAnalyticsJourneyFunnelRequestData = {attributes: ProductAnalyticsJourneyFunnelRequestAttributes, type: ProductAnalyticsJourneyRequestType};

export type ProductAnalyticsJourneyFunnelRequest = {data: ProductAnalyticsJourneyFunnelRequestData};

export type CreateApiApiV2ProductAnalyticsJourneyFunnelArgs = {body: ProductAnalyticsJourneyFunnelRequest};

export type CreateApiApiV2ProductAnalyticsJourneyFunnelOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const productAnalyticsElapsedTime = z.object({avg: z.number().int(), max: z.number().int(), min: z.number().int()});

export const productAnalyticsJourneyFunnelStepGroup = z.object({conversion_count: z.number().int(), elapsed_time_to_next_step: productAnalyticsElapsedTime, group_tags: z.array(z.string()), value: z.number()});

export const productAnalyticsJourneyFunnelStep = z.object({elapsed_time_to_next_step: productAnalyticsElapsedTime, groups: z.array(productAnalyticsJourneyFunnelStepGroup), label: z.string(), unit: z.string(), value: z.number()});

export const productAnalyticsJourneyFunnelResponseAttributes = z.object({end_to_end_conversion_rate: z.number(), end_to_end_elapsed_time: productAnalyticsElapsedTime, funnel_steps: z.array(productAnalyticsJourneyFunnelStep), initial_count: z.number().int()});

export const productAnalyticsJourneyFunnelResponseType = z.literal("funnel_response");

export const productAnalyticsJourneyFunnelResponseData = z.object({attributes: productAnalyticsJourneyFunnelResponseAttributes, id: z.string(), type: productAnalyticsJourneyFunnelResponseType});

export const productAnalyticsJourneyFunnelResponse = z.object({data: productAnalyticsJourneyFunnelResponseData});

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
};

/**
 * Compute journey funnel analysis
 * 
 * POST /api/v2/product-analytics/journey/funnel
 * 
 * Also accepts auth: AuthZ
 */
export const createApiApiV2ProductAnalyticsJourneyFunnel = async (args: CreateApiApiV2ProductAnalyticsJourneyFunnelArgs, options?: CreateApiApiV2ProductAnalyticsJourneyFunnelOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = 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("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/product-analytics/journey/funnel${query.size > 0 ? `?${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(productAnalyticsJourneyFunnelResponse, await res.json())
};