import {z} from 'zod'

export type DocumentType = 'Notice' | 'Rule' | 'Proposed Rule' | 'Supporting & Related Material' | 'Other';

export type GetApiDocumentsArgs = {'filter[agencyId]'?: string | undefined, 'filter[commentEndDate]'?: string | undefined, 'filter[docketId]'?: string | undefined, 'filter[documentType]'?: DocumentType | undefined, 'filter[frDocNum]'?: string | undefined, 'filter[searchTerm]'?: string | undefined, 'filter[postedDate]'?: string | undefined, 'filter[lastModifiedDate]'?: string | undefined, 'filter[subtype]'?: string | undefined, 'filter[withinCommentPeriod]'?: boolean | undefined, sort?: string | undefined, 'page[number]'?: number | undefined, 'page[size]'?: number | undefined};

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

export const documentType = z.enum(["Notice", "Rule", "Proposed Rule", "Supporting & Related Material", "Other"]);

export const document = z.object({agencyId: z.string().optional(), commentEndDate: z.string().nullable().optional(), commentStartDate: z.string().nullable().optional(), docketId: z.string().optional(), documentType: documentType.optional(), frDocNum: z.string().optional(), highlightedContent: z.string().nullable().optional(), lastModifiedDate: z.string().optional(), objectId: z.string().optional(), openForComment: z.boolean().optional(), postedDate: z.string().optional(), subtype: z.string().nullable().optional(), title: z.string().optional(), withdrawn: z.boolean().optional()});

export const link = z.string();

export const selfLink = z.object({self: link.optional()});

export const documentFindAllItem = z.object({id: z.string().optional(), type: z.string().optional(), attributes: document.optional(), links: z.array(selfLink).optional()});

export const findAllResponseMetadata = z.object({hasNextPage: z.boolean().optional(), hasPreviousPage: z.boolean().optional(), numberOfElements: z.number().int().optional(), pageNumber: z.number().int().optional(), pageSize: z.number().int().optional(), totalElements: z.number().int().optional(), totalPages: z.number().int().optional(), firstPage: z.boolean().optional(), lastPage: z.boolean().optional()});

export const documentFindAllResponse = z.object({data: z.array(documentFindAllItem).optional(), meta: findAllResponseMetadata.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
};

/**
 * List of documents
 * 
 * GET /documents
 */
export const getApiDocuments = async (args: GetApiDocumentsArgs, options?: GetApiDocumentsOptions) => {
const {baseUrl = "https://api.regulations.gov/v4", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args['filter[agencyId]'] != null) query.append("filter[agencyId]", String(args['filter[agencyId]']))
if (args['filter[commentEndDate]'] != null) query.append("filter[commentEndDate]", String(args['filter[commentEndDate]']))
if (args['filter[docketId]'] != null) query.append("filter[docketId]", String(args['filter[docketId]']))
if (args['filter[documentType]'] != null) query.append("filter[documentType]", String(args['filter[documentType]']))
if (args['filter[frDocNum]'] != null) query.append("filter[frDocNum]", String(args['filter[frDocNum]']))
if (args['filter[searchTerm]'] != null) query.append("filter[searchTerm]", String(args['filter[searchTerm]']))
if (args['filter[postedDate]'] != null) query.append("filter[postedDate]", String(args['filter[postedDate]']))
if (args['filter[lastModifiedDate]'] != null) query.append("filter[lastModifiedDate]", String(args['filter[lastModifiedDate]']))
if (args['filter[subtype]'] != null) query.append("filter[subtype]", String(args['filter[subtype]']))
if (args['filter[withinCommentPeriod]'] != null) query.append("filter[withinCommentPeriod]", String(args['filter[withinCommentPeriod]']))
if (args.sort != null) query.append("sort", String(args.sort))
if (args['page[number]'] != null) query.append("page[number]", String(args['page[number]']))
if (args['page[size]'] != null) query.append("page[size]", String(args['page[size]']))
if (ApiKeyAuth !== undefined) headers.set("X-Api-Key", ApiKeyAuth)

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