import {z} from 'zod'

export type GetApiAuditArgs = {limit?: number | undefined, cursor?: string | undefined, q?: string | undefined, review?: ('open' | 'confirmed' | 'dismissed' | 'unreviewed') | undefined};

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

export const appliedDecisionControls = z.object({governanceRevision: z.number().int().gte(1), organizationApproval: z.object({requireSecondReview: z.boolean(), secondReviewFor: z.array(z.enum(["same_identity", "allow", "restrict", "escalate"])), approverRoles: z.array(z.enum(["owner", "admin", "analyst"]))}), restrictedRoles: z.object({approval: z.array(z.enum(["analyst", "developer", "viewer"])), production: z.array(z.enum(["analyst", "developer", "viewer"]))}), screeningPolicy: z.object({id: z.string(), version: z.number().int().gte(1), review: z.object({requireSecondReview: z.boolean(), secondReviewFor: z.array(z.enum(["same_identity", "allow", "restrict", "escalate"])), approverRoles: z.array(z.enum(["owner", "admin", "analyst"]))})}).nullable()});

export const auditPage = z.object({items: z.array(z.object({id: z.string(), caseId: z.string(), actorId: z.string(), actorEmail: z.string().nullable(), decision: z.enum(["open", "confirmed", "dismissed"]), businessDisposition: z.enum(["pending", "allow", "restrict", "escalate"]), appliedControls: appliedDecisionControls.nullable(), notes: z.string().nullable(), createdAt: z.string(), screeningId: z.string().nullable(), subjectName: z.string().nullable(), evidenceAvailable: z.boolean()})), nextCursor: z.string().nullable()});

export const getApiAuditResponse = z.object({data: auditPage});

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 retained human review decisions
 * 
 * GET /audit
 */
export const getApiAudit = async (args: GetApiAuditArgs, options: GetApiAuditOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.q != null) query.append("q", String(args.q))
if (args.review != null) query.append("review", String(args.review))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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