import {z} from 'zod'

export type PageSize = number;

export type PageCursor = string;

export type KnowledgeBaseResourceTypeFilter = 'FILE' | 'URL';

export type GetApiKnowledgeBaseResourcesArgs = {pageSize?: PageSize | undefined, pageCursor?: PageCursor | undefined, q?: string | undefined, typeMatchesAny?: Array<KnowledgeBaseResourceTypeFilter> | undefined, lastUpdatedAfter?: string | undefined, lastUpdatedBefore?: string | undefined, matchesTags?: string | undefined, expiresBefore?: string | undefined, expiresAfter?: string | undefined};

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

export const knowledgeBaseResourceActorAssignment = z.object({type: z.enum(["User", "Team"]), id: z.string(), displayName: z.string().nullable()});

export const knowledgeBaseExpirationStatus = z.enum(["CURRENT", "EXPIRED"]);

export const tagInput = z.object({categoryId: z.string(), tagId: z.string()});

export const knowledgeBaseDocumentResourceOutput = z.object({id: z.string(), type: z.literal("FILE"), title: z.string(), description: z.string().nullable(), fileUrl: z.string(), customerVisibility: z.enum(["PRIVATE", "SHAREABLE", "REQUEST_ACCESS", "PUBLIC", "null"]).nullable(), downloadPermission: z.enum(["VIEW_ONLY", "VIEW_AND_DOWNLOAD", "null"]).nullable(), isUsedInQuestionnaires: z.boolean().nullable(), ownerAssignment: knowledgeBaseResourceActorAssignment.nullable(), expirationStatus: knowledgeBaseExpirationStatus, expirationDate: z.string().nullable(), lastUpdated: z.string(), lastVerified: z.string().nullable(), tags: z.array(tagInput), categoryId: z.string().nullable()});

export const knowledgeBaseWebpageResourceOutput = z.object({id: z.string(), type: z.literal("URL"), title: z.string(), description: z.string().nullable(), url: z.string(), customerVisibility: z.enum(["PRIVATE", "SHAREABLE", "REQUEST_ACCESS", "PUBLIC", "null"]).nullable(), includeSubPages: z.boolean().nullable(), isUsedInQuestionnaires: z.boolean().nullable(), ownerAssignment: knowledgeBaseResourceActorAssignment.nullable(), expirationStatus: knowledgeBaseExpirationStatus, expirationDate: z.string().nullable(), lastUpdated: z.string(), lastVerified: z.string().nullable(), tags: z.array(tagInput), categoryId: z.string().nullable()});

export const trustKnowledgeBaseResourceOutput = z.union([knowledgeBaseDocumentResourceOutput, knowledgeBaseWebpageResourceOutput]);

export const pageInfo = z.object({endCursor: z.string().nullable(), hasNextPage: z.boolean(), hasPreviousPage: z.boolean(), startCursor: z.string().nullable()});

export const paginatedResponseTrustKnowledgeBaseResourceOutput = z.object({results: z.object({data: z.array(trustKnowledgeBaseResourceOutput), pageInfo: pageInfo})});

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 Knowledge Base resources
 * 
 * GET /knowledge-base/resources
 */
export const getApiKnowledgeBaseResources = async (args: GetApiKnowledgeBaseResourcesArgs, options?: GetApiKnowledgeBaseResourcesOptions) => {
const {baseUrl = "https://api.vanta.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.pageSize != null) query.append("pageSize", String(args.pageSize))
if (args.pageCursor != null) query.append("pageCursor", String(args.pageCursor))
if (args.q != null) query.append("q", String(args.q))
for (const item of args.typeMatchesAny ?? []) query.append("typeMatchesAny", String(item))
if (args.lastUpdatedAfter != null) query.append("lastUpdatedAfter", String(args.lastUpdatedAfter))
if (args.lastUpdatedBefore != null) query.append("lastUpdatedBefore", String(args.lastUpdatedBefore))
if (args.matchesTags != null) query.append("matchesTags", String(args.matchesTags))
if (args.expiresBefore != null) query.append("expiresBefore", String(args.expiresBefore))
if (args.expiresAfter != null) query.append("expiresAfter", String(args.expiresAfter))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/knowledge-base/resources${query.size > 0 ? `?${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(paginatedResponseTrustKnowledgeBaseResourceOutput, await res.json())
};