import {z} from 'zod'

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

export const publicCubeMetaMember = z.object({name: z.string(), title: z.string().nullable().optional(), shortTitle: z.string().nullable().optional(), aliasName: z.string().nullable().optional(), type: z.string().nullable().optional(), description: z.string().nullable().optional(), aggType: z.string().nullable().optional(), drillMembers: z.array(z.string()).nullable().optional(), format: z.string().nullable().optional(), primaryKey: z.boolean().nullable().optional(), suggestFilterValues: z.boolean().nullable().optional(), nullable: z.boolean().nullable().optional(), values: z.array(z.string()).nullable().optional(), allowedGranularities: z.array(z.string()).nullable().optional(), jsonSchema: z.record(z.string(), z.unknown()).nullable().optional(), monetary: z.boolean().nullable().optional(), currencyDimension: z.string().nullable().optional(), currencySensitive: z.boolean().nullable().optional(), alignAxis: z.string().nullable().optional()});

export const publicCubeRelationship = z.object({target: z.string(), relationship: z.enum(["one_to_one", "one_to_many", "many_to_one"])});

export const publicCubeMetaCube = z.object({name: z.string(), type: z.enum(["cube", "view"]).nullable().optional(), title: z.string().nullable().optional(), description: z.string().nullable().optional(), connectedComponent: z.number().int().nullable().optional(), measures: z.array(publicCubeMetaMember).optional(), dimensions: z.array(publicCubeMetaMember).optional(), hierarchies: z.array(z.record(z.string(), z.unknown())).optional(), segments: z.array(publicCubeMetaMember).optional(), relationships: z.array(publicCubeRelationship).optional(), domain: z.string().nullable().optional(), queryGroup: z.string().nullable().optional()});

export const insightsCatalog = z.object({entities: z.array(publicCubeMetaCube), coveredOperations: z.array(z.string())});

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
};

/**
 * Get Catalog
 * 
 * GET /insights/catalog
 */
export const getApiInsightsCatalog = async (options?: GetApiInsightsCatalogOptions) => {
const {baseUrl = "https://api.chift.eu", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/insights/catalog${query.size > 0 ? `?${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(insightsCatalog, await res.json())
};