import type {
  FlowAnalyticsDto,
  FlowClientsDto,
  FlowExportersDto,
  FlowMapHopsDto,
  FlowMonthlyDto,
  FlowPurgeDto,
  FlowStatsDto,
  TrafficFlowHostFile,
  TrafficFlowOverlayResult,
  TrafficFlowSettingsDto,
  TrafficFlowSettingsPatch,
} from "@mmapp/contracts/traffic-flow"
import { z } from "zod"
import { trafficFlowSettingsDtoSchema, trafficFlowSettingsPatchSchema, trafficFlowHostFileSchema, flowPurgeDtoSchema } from "@mmapp/contracts/traffic-flow"
import { requestJson } from "@/shared/api/http-client"

export type { TrafficFlowHostFile }

const flowSettingsSchema = trafficFlowSettingsDtoSchema.extend({ flowListenPort: z.number().int().min(1).max(65535), wgListenPort: z.number().int().min(1).max(65535) }).refine(data => (!data.hasHostPrivateKey || data.hostPublicKey.length > 0) && (!data.listenerBound || !!data.listenerAddress) && (data.lastDatagramAt === null || Number.isFinite(Date.parse(data.lastDatagramAt))) && new Set(data.peers.map(peer => peer.serverId)).size === data.peers.length, "Несогласованные настройки NetFlow")
const flowPatchSchema = trafficFlowSettingsPatchSchema.extend({ flowListenPort: z.number().int().min(1).max(65535).optional(), wgListenPort: z.number().int().min(1).max(65535).optional() }).strict()
function flowConfirmed<T>(schema: z.ZodType<T>, raw: unknown): T {
  const parsed = schema.safeParse(raw)
  if (!parsed.success) throw new Error("Данные NetFlow не подтверждены: получен некорректный ответ сервера")
  return parsed.data
}
function flowJson(baseUrl: string, path: string, init?: RequestInit) {
  return requestJson<unknown>(baseUrl, path, { ...init, signal: AbortSignal.any([...(init?.signal ? [init.signal] : []), AbortSignal.timeout(30_000)]) })
}
export async function getTrafficFlowSettings(baseUrl: string, init?: RequestInit): Promise<TrafficFlowSettingsDto> {
  return flowConfirmed(flowSettingsSchema, await flowJson(baseUrl, "/api/traffic/flow/settings", { ...init, method: "GET" }))
}
export async function putTrafficFlowSettings(baseUrl: string, patch: TrafficFlowSettingsPatch, init?: RequestInit) {
  const valid = flowPatchSchema.safeParse(patch)
  if (!valid.success || !Object.values(valid.data).some(value => value !== undefined)) throw new Error("Укажите допустимые настройки NetFlow")
  const body = valid.data
  const response = flowConfirmed(z.object({ ok: z.literal(true), settings: flowSettingsSchema, listenerError: z.string().optional() }), await flowJson(baseUrl, "/api/traffic/flow/settings", { ...init, method: "PUT", body: JSON.stringify(body) }))
  if (Object.entries(body).some(([field, value]) => value !== undefined && (response.settings as Record<string, unknown>)[field] !== value)) throw new Error("Сохранение NetFlow не подтверждено: сервер вернул другие настройки")
  return response
}
export async function generateTrafficFlowKeys(baseUrl: string, init?: RequestInit) {
  const schema = z.object({ ok: z.literal(true), created: z.boolean(), publicKey: z.string().min(1), settings: flowSettingsSchema }).refine(data => data.settings.hasHostPrivateKey && data.publicKey === data.settings.hostPublicKey)
  return flowConfirmed(schema, await flowJson(baseUrl, "/api/traffic/flow/settings/generate-keys", { ...init, method: "POST" }))
}
export async function getTrafficFlowHostFiles(baseUrl: string, init?: RequestInit): Promise<{ files: TrafficFlowHostFile[] }> {
  const file = trafficFlowHostFileSchema.extend({ id: z.string().min(1), label: z.string().min(1), filename: z.string().min(1).refine(name => !/[\\/\r\n]/.test(name)), code: z.string().min(1) })
  const schema = z.object({ files: z.array(file).min(1).refine(files => new Set(files.map(item => item.id)).size === files.length && new Set(files.map(item => item.filename)).size === files.length) })
  return flowConfirmed(schema, await flowJson(baseUrl, "/api/traffic/flow/host-files", { ...init, method: "GET" }))
}

export async function applyTrafficFlowOverlay(
  baseUrl: string,
  serverId: string | number,
  publicEndpoint?: string,
  opts?: { disableGreFastPath?: boolean },
): Promise<TrafficFlowOverlayResult> {
  return requestJson(baseUrl, "/api/traffic/flow-overlay", {
    method: "POST",
    body: JSON.stringify({
      serverId,
      publicEndpoint,
      ...(opts?.disableGreFastPath ? { disableGreFastPath: true } : {}),
    }),
  })
}

export async function getTrafficFlows(baseUrl: string, range = "5m"): Promise<FlowStatsDto> {
  return requestJson<FlowStatsDto>(baseUrl, `/api/traffic/flows?range=${encodeURIComponent(range)}`)
}

function flowQuery(params: {
  range?: string
  serverId?: string
  userId?: string
  iface?: string
  dedup?: boolean
  excludeMesh?: boolean
  excludeOverlay?: boolean
}): string {
  const q = new URLSearchParams()
  if (params.range) q.set("range", params.range)
  if (params.serverId) q.set("serverId", params.serverId)
  if (params.userId) q.set("userId", params.userId)
  if (params.iface && params.iface !== "__all__") q.set("iface", params.iface)
  if (params.dedup === false) q.set("dedup", "0")
  else if (params.dedup === true) q.set("dedup", "1")
  if (params.excludeMesh === false) q.set("excludeMesh", "0")
  else if (params.excludeMesh === true) q.set("excludeMesh", "1")
  if (params.excludeOverlay === false) q.set("excludeOverlay", "0")
  else if (params.excludeOverlay === true) q.set("excludeOverlay", "1")
  const s = q.toString()
  return s ? `?${s}` : ""
}

export async function getFlowExporters(baseUrl: string, range = "5m"): Promise<FlowExportersDto> {
  return requestJson<FlowExportersDto>(baseUrl, `/api/traffic/flow/exporters?range=${encodeURIComponent(range)}`)
}

export async function getFlowClients(baseUrl: string, range = "5m"): Promise<FlowClientsDto> {
  return requestJson<FlowClientsDto>(baseUrl, `/api/traffic/flow/clients?range=${encodeURIComponent(range)}`)
}

export async function getFlowMapHops(
  baseUrl: string,
  params: {
    range?: string
    serverId?: string
    userId?: string
    iface?: string
    dedup?: boolean
    excludeMesh?: boolean
    excludeOverlay?: boolean
  } = {},
): Promise<FlowMapHopsDto> {
  return requestJson<FlowMapHopsDto>(baseUrl, `/api/traffic/flow/map-hops${flowQuery({
    range: params.range ?? "5m",
    serverId: params.serverId,
    userId: params.userId,
    iface: params.iface,
    dedup: params.dedup,
    excludeMesh: params.excludeMesh,
    excludeOverlay: params.excludeOverlay,
  })}`)
}

export async function getFlowAnalytics(
  baseUrl: string,
  params: {
    range?: string
    serverId?: string
    userId?: string
    iface?: string
    dedup?: boolean
    excludeMesh?: boolean
    excludeOverlay?: boolean
  },
): Promise<FlowAnalyticsDto> {
  return requestJson<FlowAnalyticsDto>(baseUrl, `/api/traffic/flow/analytics${flowQuery(params)}`)
}

export async function getFlowMonthly(
  baseUrl: string,
  params: { month: string; serverId?: string },
): Promise<FlowMonthlyDto> {
  const q = new URLSearchParams()
  q.set("month", params.month)
  if (params.serverId) q.set("serverId", params.serverId)
  return requestJson<FlowMonthlyDto>(baseUrl, `/api/traffic/flow/monthly?${q.toString()}`)
}

export async function purgeTrafficFlowData(baseUrl: string, init?: RequestInit): Promise<FlowPurgeDto> {
  return flowConfirmed(flowPurgeDtoSchema, await flowJson(baseUrl, "/api/traffic/flow/purge", { ...init, method: "POST" }))
}

export async function rebuildTrafficFlowFacts(baseUrl: string): Promise<{
  ok: true
  buckets: number
  facts: number
  days: string[]
}> {
  return requestJson(baseUrl, "/api/traffic/flow/rebuild-facts", { method: "POST" })
}

export { flowQuery }