/**
 * Снимок прогона планировщика (JSON из `scheduler_runs.result_json`).
 * Дублирует контракт `backend/src/types/scheduler-run-snapshot.ts` для UI.
 */

export interface ServerRestPingSnapshot {
  serverId: number
  name: string
  host: string
  ok: boolean
  latencyMs?: number | null
  error?: string
}

export interface ServersRestPingRunSnapshot {
  v: number
  job: "servers_rest_ping"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  servers: ServerRestPingSnapshot[]
}

export type AlertEngineRuleDiagSnapshot = {
  ruleId: string
  inGroup: boolean
  evalHit: boolean
  hitTransition?: "problem" | "recovery" | "neutral"
  hitMessage?: string
  stabilityOk: boolean
  cooldownOk: boolean
  telegramOk: boolean
  blocked?:
    | "no_hit"
    | "stability"
    | "cooldown"
    | "no_telegram"
    | "dedupe_positive"
    | "in_group"
}

/** Сводка прогона движка оповещений (JSON из `scheduler_runs` для job `alert_engine`). */
export interface AlertEngineRunSnapshot {
  v: number
  job: "alert_engine"
  sampledAt: string
  rulesChecked: number
  standaloneFires: number
  groupFires: number
  skippedNoTelegram: boolean
  errors?: string[]
  ruleDiag?: AlertEngineRuleDiagSnapshot[]
}

export interface GreBgpSnapshotRunSnapshot {
  v: number
  job: "gre_bgp"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  greWritten: number
  bgpWritten: number
  errors?: string[]
}

export interface InternetPathRunSnapshot {
  v: number
  job: "internet_path"
  sampledAt: string
  homes: number
  snapshotSaved: boolean
  fatalError?: string
}

export interface CertificatesRenewRunSnapshot {
  v: number
  job: "certificates_renew"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  checked: number
  renewed: number
  skippedTargets: number
  errors: string[]
}

export interface BackupsRunSnapshot {
  v: number
  job: "backups"
  sampledAt: string
  skipped?: boolean
  due: boolean
  created: number
  failures: number
  pruned: number
  uploadFailures?: number
  pruneFailures?: number
  metadataError?: string
  eventErrors?: string[]
  errors?: string[]
  fatalError?: string
}

export interface GeoipUpdateRunSnapshot {
  v: number
  job: "geoip_update"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  checked: number
  downloaded: number
  skippedUnchanged: number
  bytes: number
  errors: string[]
}

export interface RouterLogsRunSnapshot {
  v: 1
  job: "router_logs"
  sampledAt: string
  skipped?: boolean
  errors: string[]
  servers: { serverId: number; name: string; added: number; gap: boolean; error?: string }[]
}
export type SchedulerRunSnapshot =
  | RouterLogsRunSnapshot
  | TrafficRunSnapshot
  | ResourcesRunSnapshot
  | PingRunSnapshot
  | SpeedScheduledRunSnapshot
  | ServersRestPingRunSnapshot
  | GreBgpSnapshotRunSnapshot
  | InternetPathRunSnapshot
  | CertificatesRenewRunSnapshot
  | BackupsRunSnapshot
  | GeoipUpdateRunSnapshot
  | AlertEngineRunSnapshot

export interface TrafficServerSnapshot {
  serverId: number
  name: string
  host: string
  ok: boolean
  error?: string
  interfaces?: number
  sumRxMbps?: number
  sumTxMbps?: number
}

export interface TrafficRunSnapshot {
  v: number
  job: "traffic"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  servers: TrafficServerSnapshot[]
}

export interface ResourceServerSnapshot {
  serverId: number
  name: string
  host: string
  status: "online" | "offline"
  error?: string
  cpuLoadPct?: number
  memUsedMb?: number
  memTotalMb?: number
  memUsedPct?: number
  diskFreeMb?: number
  diskTotalMb?: number
  uptimeSeconds?: number
  boardName?: string
  rosVersion?: string
}

export interface ResourcesRunSnapshot {
  v: number
  job: "uptime_resources"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  servers: ResourceServerSnapshot[]
}

export interface PingProbeSnapshot {
  probeId: string
  name: string
  target: string
  srcServerId: number
  srcServerName: string
  srcInterface: string
  ok: boolean
  rttMs: number | null
  lossPct: number | null
  status: "up" | "warn" | "down" | "unknown"
  error?: string
}

export interface PingRunSnapshot {
  v: number
  job: "uptime_ping"
  sampledAt: string
  skipped?: boolean
  fatalError?: string
  probes: PingProbeSnapshot[]
  skippedByInterval?: number
}

export interface SpeedRunSnapshot {
  probeId: string
  srcServerId: number
  srcServerName: string
  dstServerId: number
  dstServerName: string
  srcInterface: string
  dstInterface: string
  protocol: string
  direction: string
  durationSec: number
  ok: boolean
  txAvgMbps?: number | null
  rxAvgMbps?: number | null
  pingRttMs?: number | null
  pingLossPct?: number | null
  pingError?: string | null
  error?: string
}

export interface SpeedScheduledRunSnapshot {
  v: number
  job: "uptime_speed"
  sampledAt: string
  runs: SpeedRunSnapshot[]
}

/** PostgreSQL JSONB returns an object; older records may still contain JSON text. */
export function parseSchedulerRunSnapshot(raw: unknown): SchedulerRunSnapshot | null {
  try {
    const value: unknown = typeof raw === "string" ? (raw.trim() ? JSON.parse(raw) : null) : raw
    if (!value || typeof value !== "object" || Array.isArray(value)) return null
    const o = value as Record<string, unknown>
    if (o.v !== 1 || typeof o.job !== "string" || typeof o.sampledAt !== "string" || !Number.isFinite(Date.parse(o.sampledAt))) return null
    if (o.skipped !== undefined && typeof o.skipped !== "boolean") return null
    if (o.fatalError !== undefined && typeof o.fatalError !== "string") return null
    for (const field of ["errors", "eventErrors"]) if (o[field] !== undefined && (!Array.isArray(o[field]) || !(o[field] as unknown[]).every(error => typeof error === "string"))) return null
    const arrays: Record<string, string> = { router_logs: "servers", traffic: "servers", uptime_resources: "servers", servers_rest_ping: "servers", uptime_ping: "probes", uptime_speed: "runs" }
    if (Object.hasOwn(arrays, o.job)) {
      if (!Array.isArray(o[arrays[o.job]])) return null
    } else {
      const fields: Record<string, string[]> = { gre_bgp: ["greWritten", "bgpWritten"], internet_path: ["homes"], certificates_renew: ["checked", "renewed", "skippedTargets"], backups: ["created", "failures", "pruned"], geoip_update: ["checked", "downloaded", "skippedUnchanged", "bytes"], alert_engine: ["rulesChecked", "standaloneFires", "groupFires"] }
      if (!Object.hasOwn(fields, o.job) || !fields[o.job].every(field => typeof o[field] === "number" && Number.isSafeInteger(o[field]) && (o[field] as number) >= 0)) return null
      if (["certificates_renew", "geoip_update"].includes(o.job) && !Array.isArray(o.errors)) return null
      if (o.job === "backups") {
        if (typeof o.due !== "boolean") return null
        for (const field of ["uploadFailures", "pruneFailures"]) if (o[field] !== undefined && (typeof o[field] !== "number" || !Number.isSafeInteger(o[field]) || (o[field] as number) < 0)) return null
        if (o.metadataError !== undefined && typeof o.metadataError !== "string") return null
      }
      if (o.job === "internet_path" && typeof o.snapshotSaved !== "boolean") return null
      if (o.job === "alert_engine" && typeof o.skippedNoTelegram !== "boolean") return null
    }
    return o as unknown as SchedulerRunSnapshot
  } catch {
    return null
  }
}