import type { MikrotikClient } from "./mikrotik.js"
import { MikrotikError } from "./mikrotik.js"
import { parseRecursiveCatalog } from "./recursive-route-catalog.js"

export class RecursiveApplyError extends Error {
  constructor(message: string, public readonly receipt: {
    state: "partial" | "unknown" | "rejected" | "applied"
    confirmedWrites: number
    createdIds: string[]
    deletedIds: string[]
    needsReview: boolean
    metadataRecorded: boolean
  }) { super(message); this.name = "RecursiveApplyError" }
}

export async function executeRecursiveApply(
  client: Pick<MikrotikClient, "get" | "put" | "delete">,
  payloads: Record<string, string>[],
  persist: () => Promise<void>,
) {
  // The editor replaces every owned row: reject unsupported ownership before any write.
  const existing = parseRecursiveCatalog(await client.get<unknown>("/ip/route"))
  const createdIds: string[] = [], deletedIds: string[] = []
  let nativeComplete = false
  try {
    for (const payload of payloads) {
      const result = await client.put<unknown>("/ip/route", payload)
      if (!result || typeof result !== "object" || !(".id" in result) || typeof result[".id"] !== "string" || !result[".id"].trim()) throw new Error("RouterOS не подтвердил ID созданного маршрута")
      createdIds.push(result[".id"])
    }
    for (const route of existing) {
      await client.delete("/ip/route/" + encodeURIComponent(route.id))
      deletedIds.push(route.id)
    }
    nativeComplete = true
    await persist()
    return { pushed: createdIds.length, deleted: deletedIds.length }
  } catch (error) {
    const rejected = error instanceof MikrotikError && error.statusCode >= 400 && error.statusCode < 500
    const confirmedWrites = createdIds.length + deletedIds.length
    const state = nativeComplete ? "applied" : rejected ? (confirmedWrites ? "partial" : "rejected") : "unknown"
    throw new RecursiveApplyError(`Подтверждено записей RouterOS: ${confirmedWrites}. Обновите каталог перед повторной попыткой. ${String(error)}`, {
      state, confirmedWrites, createdIds, deletedIds, needsReview: state !== "rejected", metadataRecorded: false,
    })
  }
}