import {z} from 'zod'

export type CreateApiAuditVerifyArgs = {fromSeq?: number | undefined, toSeq?: number | undefined, requireHead?: boolean | undefined, 'X-Steward-Request-Timestamp'?: string | undefined, 'X-Steward-Request-Expires-At'?: string | undefined, 'X-Steward-Signature'?: string | undefined, 'X-Steward-Signing-Key-Id'?: string | undefined, 'Idempotency-Key'?: string | undefined};

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

export const createApiAuditVerifyResponse = z.object({ok: z.literal(true), data: z.union([z.object({valid: z.boolean(), count: z.number().int().gte(0), brokenAt: z.number().int().gte(1).optional(), anchored: z.boolean(), requireHead: z.boolean(), verifiedFromSeq: z.number().int().gte(1), verifiedToSeq: z.number().int().gte(0), warning: z.string().optional()}), z.object({valid: z.boolean(), count: z.number().int().gte(0).optional(), brokenAt: z.number().int().gte(1), anchored: z.boolean(), requireHead: z.boolean(), verifiedFromSeq: z.number().int().gte(1), verifiedToSeq: z.number().int().gte(0), warning: 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
};

/**
 * Verify tenant audit chain integrity
 * 
 * POST /audit/verify
 */
export const createApiAuditVerify = async (args: CreateApiAuditVerifyArgs, options?: CreateApiAuditVerifyOptions) => {
const {baseUrl = "http://localhost:3200", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.fromSeq != null) query.append("fromSeq", String(args.fromSeq))
if (args.toSeq != null) query.append("toSeq", String(args.toSeq))
if (args.requireHead != null) query.append("requireHead", String(args.requireHead))
if (args['X-Steward-Request-Timestamp'] != null) headers.set("X-Steward-Request-Timestamp", String(args['X-Steward-Request-Timestamp']))
if (args['X-Steward-Request-Expires-At'] != null) headers.set("X-Steward-Request-Expires-At", String(args['X-Steward-Request-Expires-At']))
if (args['X-Steward-Signature'] != null) headers.set("X-Steward-Signature", String(args['X-Steward-Signature']))
if (args['X-Steward-Signing-Key-Id'] != null) headers.set("X-Steward-Signing-Key-Id", String(args['X-Steward-Signing-Key-Id']))
if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/audit/verify${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiAuditVerifyResponse, await res.json())
};