import {z} from 'zod'

export type GetApiSessionsSessionIdQcVariantMetricsArgs = {session_id: string};

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

export const variantQCMetrics = z.object({total_records: z.number().int(), snv_count: z.number().int().nullable(), transitions: z.number().int().nullable(), transversions: z.number().int().nullable(), ti_tv_ratio: z.number().nullable(), depth_record_count: z.number().int().nullable(), median_depth: z.number().nullable().optional(), depth_ge_20_count: z.number().int().nullable().optional(), pct_variant_records_ge_20x: z.number().nullable().optional(), het_ab_record_count: z.number().int().nullable().optional(), het_ab_mean: z.number().nullable().optional(), het_ab_median: z.number().nullable().optional(), mean_depth: z.number().nullable(), depth_ge_10_count: z.number().int().nullable(), pct_variant_records_ge_10x: z.number().nullable(), diploid_genotype_count: z.number().int().nullable(), heterozygous_count: z.number().int().nullable(), homozygous_alt_count: z.number().int().nullable(), het_hom_alt_ratio: z.number().nullable(), filter_record_count: z.number().int().nullable(), pass_filter_count: z.number().int().nullable(), failed_filter_count: z.number().int().nullable(), not_applied_filter_count: z.number().int().nullable(), unknown_filter_count: z.number().int().nullable(), pct_pass_filter: z.number().nullable(), computed_at: z.string()});

export const variantQCResponse = z.object({session_id: z.string(), available: z.boolean(), reason: z.string().nullable(), scope: z.literal("stored_variant_records"), schema_version: z.literal(1), single_sample: z.boolean(), thresholds_applied: z.literal(false), sample_metrics_reason: z.string().nullable(), metrics: variantQCMetrics.nullable()});

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
};

/**
 * Descriptive QC of stored variant records
 * 
 * GET /sessions/{session_id}/qc/variant-metrics
 */
export const getApiSessionsSessionIdQcVariantMetrics = async (args: GetApiSessionsSessionIdQcVariantMetricsArgs, options: GetApiSessionsSessionIdQcVariantMetricsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/sessions/${encodeURIComponent(String(args.session_id))}/qc/variant-metrics${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(variantQCResponse, await res.json())
};