import {z} from 'zod'

export type GetApiSearchArchivesArgs = {'sps.repositoryCountries'?: Array<string> | undefined, 'sps.repositoryRegions'?: Array<string> | undefined, 'sps.repositoryCounties'?: Array<string> | undefined, 'sps.repositoryTypes'?: (Array<'Local' | 'Special' | 'National' | 'University' | 'Private' | 'Business'>) | undefined, 'sps.archiveCode'?: number | undefined, 'sps.titleContains'?: string | undefined, 'sps.searchQuery': string, 'sps.returnHighlighted'?: boolean | undefined, 'sps.sortByOption'?: ('RELEVANCE' | 'REFERENCE_ASCENDING' | 'DATE_ASCENDING' | 'DATE_DESCENDING' | 'TITLE_ASCENDING' | 'TITLE_DESCENDING') | undefined, 'sps.page'?: number | undefined, 'sps.resultsPageSize'?: number | undefined, 'sps.titleFirstLetter'?: string | undefined, 'sps.batchStartMark'?: string | undefined, 'sps.preferenceQueryStringParameter'?: string | undefined};

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

export const repositorySearchResultViewModel = z.object({Address: z.string().optional(), Id: z.string().optional(), Reference: z.string().optional(), Score: z.number().optional(), Source: z.string().optional(), Title: z.string().optional()});

export const facetItemViewModel = z.object({Code: z.string().optional(), Count: z.number().int().optional()});

export const repositorySearchResultsViewModel = z.object({Repositories: z.array(repositorySearchResultViewModel).optional(), RepositoryTypes: z.array(facetItemViewModel).optional(), Countries: z.array(facetItemViewModel).optional(), Regions: z.array(facetItemViewModel).optional(), Counties: z.array(facetItemViewModel).optional(), TitleFirstLetters: z.array(facetItemViewModel).optional(), Count: z.number().int().optional(), NextBatchMark: z.string().optional()});

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
};

/**
 * Execute search of archives/repositories
 * 
 * GET /search/archives
 */
export const getApiSearchArchives = async (args: GetApiSearchArchivesArgs, options?: GetApiSearchArchivesOptions) => {
const {baseUrl = "https://discovery.nationalarchives.gov.uk/API", fetch: fetchFn = fetch} = options ?? {}

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

for (const item of args['sps.repositoryCountries'] ?? []) query.append("sps.repositoryCountries", String(item))
for (const item of args['sps.repositoryRegions'] ?? []) query.append("sps.repositoryRegions", String(item))
for (const item of args['sps.repositoryCounties'] ?? []) query.append("sps.repositoryCounties", String(item))
for (const item of args['sps.repositoryTypes'] ?? []) query.append("sps.repositoryTypes", String(item))
if (args['sps.archiveCode'] != null) query.append("sps.archiveCode", String(args['sps.archiveCode']))
if (args['sps.titleContains'] != null) query.append("sps.titleContains", String(args['sps.titleContains']))
if (args['sps.searchQuery'] != null) query.append("sps.searchQuery", String(args['sps.searchQuery']))
if (args['sps.returnHighlighted'] != null) query.append("sps.returnHighlighted", String(args['sps.returnHighlighted']))
if (args['sps.sortByOption'] != null) query.append("sps.sortByOption", String(args['sps.sortByOption']))
if (args['sps.page'] != null) query.append("sps.page", String(args['sps.page']))
if (args['sps.resultsPageSize'] != null) query.append("sps.resultsPageSize", String(args['sps.resultsPageSize']))
if (args['sps.titleFirstLetter'] != null) query.append("sps.titleFirstLetter", String(args['sps.titleFirstLetter']))
if (args['sps.batchStartMark'] != null) query.append("sps.batchStartMark", String(args['sps.batchStartMark']))
if (args['sps.preferenceQueryStringParameter'] != null) query.append("sps.preferenceQueryStringParameter", String(args['sps.preferenceQueryStringParameter']))

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