import {z} from 'zod'

export type SampleIdentifier = {sampleId?: string | undefined, studyId?: string | undefined};

export type CreateApiCopyNumberSegmentsFetchArgs = {chromosome?: string | undefined, projection?: ('DETAILED' | 'ID' | 'META' | 'SUMMARY') | undefined, body: Array<SampleIdentifier>};

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

export const copyNumberSeg = z.object({chromosome: z.string(), end: z.number().int(), numberOfProbes: z.number().int(), patientId: z.string(), sampleId: z.string(), segmentMean: z.number(), start: z.number().int(), studyId: z.string(), uniquePatientKey: z.string().optional(), uniqueSampleKey: z.string().optional()});

export const createApiCopyNumberSegmentsFetchResponse = z.array(copyNumberSeg);

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
};

/**
 * Fetch copy number segments by sample ID
 * 
 * POST /copy-number-segments/fetch
 */
export const createApiCopyNumberSegmentsFetch = async (args: CreateApiCopyNumberSegmentsFetchArgs, options: CreateApiCopyNumberSegmentsFetchOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.chromosome != null) query.append("chromosome", String(args.chromosome))
if (args.projection != null) query.append("projection", String(args.projection))

const url = `${baseUrl.replace(/\/+$/, '')}/copy-number-segments/fetch${query.size > 0 ? `?${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(createApiCopyNumberSegmentsFetchResponse, await res.json())
};