import {z} from 'zod'

export type GetApiSessionsSessionIdVariantsByGeneArgs = {session_id: string, acmg_class?: (Array<string> | null) | undefined, impact?: (Array<string> | null) | undefined, gene_symbol?: (string | null) | undefined, page?: (number | null) | undefined, page_size?: (number | null) | undefined};

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

export const geneAggregated = z.object({gene_symbol: z.string(), variant_count: z.number().int(), best_acmg_class: z.string().nullable().optional(), best_acmg_priority: z.number().int().optional(), best_impact: z.string().nullable().optional(), best_priority_score: z.number().nullable().optional(), pathogenic_count: z.number().int().optional(), likely_pathogenic_count: z.number().int().optional(), vus_count: z.number().int().optional(), likely_benign_count: z.number().int().optional(), benign_count: z.number().int().optional(), variants: z.array(z.record(z.string(), z.unknown())).optional(), mtdna_variant_count: z.number().int().optional()});

export const geneAggregatedResponse = z.object({genes: z.array(geneAggregated), total_genes: z.number().int(), total_variants: z.number().int(), page: z.number().int(), page_size: z.number().int(), total_pages: z.number().int(), has_next_page: z.boolean(), has_previous_page: z.boolean()});

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 variants grouped by gene
 * 
 * GET /sessions/{session_id}/variants/by-gene
 */
export const getApiSessionsSessionIdVariantsByGene = async (args: GetApiSessionsSessionIdVariantsByGeneArgs, options: GetApiSessionsSessionIdVariantsByGeneOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

for (const item of args.acmg_class ?? []) query.append("acmg_class", String(item))
for (const item of args.impact ?? []) query.append("impact", String(item))
if (args.gene_symbol != null) query.append("gene_symbol", String(args.gene_symbol))
if (args.page != null) query.append("page", String(args.page))
if (args.page_size != null) query.append("page_size", String(args.page_size))

const url = `${baseUrl.replace(/\/+$/, '')}/sessions/${encodeURIComponent(String(args.session_id))}/variants/by-gene${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(geneAggregatedResponse, await res.json())
};