import {z} from 'zod'

export type ProductAnalyticsSankeyDefinition = {entries_per_step?: number | undefined, number_of_steps?: number | undefined, source: string, target: string};

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

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

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

export type ProductAnalyticsAudienceFilters = {accounts?: Array<ProductAnalyticsAudienceAccountSubquery> | undefined, formula?: string | undefined, segments?: Array<ProductAnalyticsAudienceSegmentSubquery> | undefined, users?: Array<ProductAnalyticsAudienceUserSubquery> | undefined};

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

export type ProductAnalyticsSankeySearch = {audience_filters?: ProductAnalyticsAudienceFilters | undefined, join_keys?: ProductAnalyticsJoinKeys | undefined, query?: string | undefined};

export type ProductAnalyticsSankeyTime = {from: number, to: number};

export type ProductAnalyticsSankeyRequestAttributes = {definition: ProductAnalyticsSankeyDefinition, search: ProductAnalyticsSankeySearch, time: ProductAnalyticsSankeyTime};

export type ProductAnalyticsSankeyRequestType = 'sankey_request';

export type ProductAnalyticsSankeyRequestData = {attributes: ProductAnalyticsSankeyRequestAttributes, type: ProductAnalyticsSankeyRequestType};

export type ProductAnalyticsSankeyRequest = {data: ProductAnalyticsSankeyRequestData};

export type CreateApiApiV2ProductAnalyticsSankeyArgs = {body: ProductAnalyticsSankeyRequest};

export type CreateApiApiV2ProductAnalyticsSankeyOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const productAnalyticsSankeyLink = z.object({column: z.number().int().optional(), id: z.string().optional(), source: z.string().optional(), target: z.string().optional(), value: z.number().int().optional()});

export const productAnalyticsSankeyAggregatedNodeType = z.literal("aggregated");

export const productAnalyticsSankeyAggregatedNode = z.object({id: z.string().optional(), incoming_value: z.number().int().optional(), name: z.string().optional(), outgoing_value: z.number().int().optional(), type: productAnalyticsSankeyAggregatedNodeType.optional(), value: z.number().int().optional()});

export const productAnalyticsSankeyNodeType = z.enum(["regular", "other", "dropoff"]);

export const productAnalyticsSankeyNode = z.object({aggregated_nodes: z.array(productAnalyticsSankeyAggregatedNode).optional(), column: z.number().int().optional(), dropoff_value: z.number().int().optional(), id: z.string().optional(), incoming_value: z.number().int().optional(), name: z.string().optional(), outgoing_value: z.number().int().optional(), type: productAnalyticsSankeyNodeType.optional(), value: z.number().int().optional()});

export const productAnalyticsSankeyResponseAttributes = z.object({links: z.array(productAnalyticsSankeyLink).optional(), nodes: z.array(productAnalyticsSankeyNode).optional()});

export const productAnalyticsSankeyResponseType = z.literal("sankey_response");

export const productAnalyticsSankeyResponseData = z.object({attributes: productAnalyticsSankeyResponseAttributes, id: z.string(), type: productAnalyticsSankeyResponseType});

export const productAnalyticsSankeyResponse = z.object({data: productAnalyticsSankeyResponseData});

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 a Sankey diagram
 * 
 * POST /api/v2/product-analytics/sankey
 * 
 * Also accepts auth: AuthZ
 */
export const createApiApiV2ProductAnalyticsSankey = async (args: CreateApiApiV2ProductAnalyticsSankeyArgs, options?: CreateApiApiV2ProductAnalyticsSankeyOptions) => {
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/sankey${query.size > 0 ? `?${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(productAnalyticsSankeyResponse, await res.json())
};