import {z} from 'zod'

export type CVEStatus = 'reported' | 'active' | 'mitigated' | 'cleared' | 'disputed' | 'unknown';

export type GetApiCvesArgs = {offset?: number | undefined, limit?: number | undefined, status?: Array<CVEStatus> | undefined, min_score?: number | undefined, min_packages_count?: number | undefined, q?: string | undefined, sort?: (Array<'score' | '-score' | 'published_at' | '-published_at' | 'modified_at' | '-modified_at' | 'created_at' | '-created_at'>) | undefined};

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

export const cVEStatus = z.enum(["reported", "active", "mitigated", "cleared", "disputed", "unknown"]);

export const artifactFamily = z.enum(["anaconda_project", "anaconda_env", "cve", "conda", "python", "cran", "notebook", "docker", "sbom"]);

export const cVE = z.object({id: z.string().optional(), description: z.string().optional(), score: z.number().optional(), cvssv2_score: z.number().optional(), cvssv3_score: z.number().optional(), curated: z.boolean().optional(), packages_count: z.number().optional(), packages: z.array(z.object({channel_name: z.string().optional(), parent_channel_name: z.string().optional(), cve_status: cVEStatus.optional(), artifact_family: artifactFamily.optional(), artifact_type: z.string().optional(), ckey: z.string().optional(), common_name: z.string().optional(), blob_sha256: z.string().optional(), blob_size: z.string().optional()})).optional(), published_at: z.string().optional(), nvd_modified_at: z.string().optional(), anaconda_modified_at: z.string().optional(), cvssv2: z.object({cvssV2: z.object({version: z.string().optional(), vectorString: z.string().optional(), accessComplexity: z.string().optional(), accessVector: z.string().optional(), authentication: z.string().optional(), availabilityImpact: z.string().optional(), baseScore: z.string().optional(), confidentialityImpact: z.string().optional(), integrityImpact: z.string().optional()}).optional(), exploitabilityScore: z.number().optional(), impactScore: z.number().optional(), severity: z.string().optional(), obtainAllPrivilege: z.boolean().optional(), obtainOtherPrivilege: z.boolean().optional(), obtainUserPrivilege: z.boolean().optional(), userInteractionRequired: z.boolean().optional()}).optional(), cvssv3: z.object({cvssV3: z.object({attackComplexity: z.string().optional(), attackVector: z.string().optional(), availabilityImpact: z.string().optional(), baseScore: z.string().optional(), baseSeverity: z.string().optional(), confidentialityImpact: z.string().optional(), integrityImpact: z.string().optional(), privilegesRequired: z.string().optional(), scope: z.string().optional(), userInteraction: z.string().optional(), vectorString: z.string().optional(), version: z.string().optional()}).optional(), exploitabilityScore: z.number().optional(), impactScore: z.number().optional()}).optional(), nvdv2: z.record(z.string(), z.unknown()).optional(), reviews: z.array(z.record(z.string(), z.unknown())).optional(), cwes: z.array(z.string()).optional()});

export const getApiCvesResponse = z.object({total_count: z.number().optional(), items: z.array(cVE).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
};

/**
 * Get list of the latest CVEs
 * 
 * GET /cves
 * 
 * Also accepts auth: user_token
 */
export const getApiCves = async (args: GetApiCvesArgs, options?: GetApiCvesOptions) => {
const {baseUrl = "https://api.anaconda.cloud/api", fetch: fetchFn = fetch, jwt} = options ?? {}

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

if (args.offset != null) query.append("offset", String(args.offset))
if (args.limit != null) query.append("limit", String(args.limit))
for (const item of args.status ?? []) query.append("status", String(item))
if (args.min_score != null) query.append("min_score", String(args.min_score))
if (args.min_packages_count != null) query.append("min_packages_count", String(args.min_packages_count))
if (args.q != null) query.append("q", String(args.q))
for (const item of args.sort ?? []) query.append("sort", String(item))
if (jwt !== undefined) headers.set('authorization', `Bearer ${jwt}`)

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