import { queryOptions } from '@tanstack/react-query'
import { apiJSON } from '@/lib/api-client'

export type AppSettings = Record<string, unknown>

export const BIRD_SETTING_KEYS = [
  'bird_router_id',
  'bird_local_ipv4',
  'bird_local_ipv6',
  'bird_local_asn',
  'bird_bgp_source_ipv4',
  'bird_bgp_source_ipv6',
] as const

export const REVISION_SETTING_KEYS = ['revision_retention_minutes'] as const

export const RUNTIME_LOGS_SETTING_KEYS = [
  'runtime_logs_auto_enabled',
  'runtime_logs_max_file_mb',
  'runtime_logs_auto_schedule',
  'runtime_logs_auto_mode',
] as const

export const KNOWN_SETTING_KEYS = [
  ...BIRD_SETTING_KEYS,
  ...REVISION_SETTING_KEYS,
  ...RUNTIME_LOGS_SETTING_KEYS,
] as const

export type KnownSettingKey = (typeof KNOWN_SETTING_KEYS)[number]
export type BirdSettingKey = (typeof BIRD_SETTING_KEYS)[number]
export type RevisionSettingKey = (typeof REVISION_SETTING_KEYS)[number]
export type RuntimeLogsSettingKey = (typeof RUNTIME_LOGS_SETTING_KEYS)[number]

export const NUMERIC_SETTING_KEYS = new Set<KnownSettingKey>([
  'bird_local_asn',
  'revision_retention_minutes',
  'runtime_logs_max_file_mb',
])

export const BOOLEAN_SETTING_KEYS = new Set<KnownSettingKey>(['runtime_logs_auto_enabled'])

export const settingsKeys = {
  all: ['settings'] as const,
}

export function settingsQueryOptions() {
  return queryOptions<AppSettings>({
    queryKey: settingsKeys.all,
    queryFn: () => apiJSON<AppSettings>('/v1/settings'),
    staleTime: 30_000,
  })
}

export function parseKnownValue(key: KnownSettingKey, value: unknown): string {
  if (NUMERIC_SETTING_KEYS.has(key)) {
    if (typeof value === 'number' && Number.isFinite(value)) return String(value)
    if (typeof value === 'string') return value
    return ''
  }
  if (typeof value === 'string') return value
  return ''
}

export interface PartitionedSettings {
  bird: Partial<Record<BirdSettingKey, string>>
  revision: Partial<Record<RevisionSettingKey, string>>
  runtimeLogs: Partial<Record<RuntimeLogsSettingKey, string>>
  additional: { id: number; key: string; value: string }[]
}

export function partitionSettings(settings: AppSettings): PartitionedSettings {
  const bird: Partial<Record<BirdSettingKey, string>> = {}
  const revision: Partial<Record<RevisionSettingKey, string>> = {}
  const runtimeLogs: Partial<Record<RuntimeLogsSettingKey, string>> = {}
  const additional: { id: number; key: string; value: string }[] = []
  let id = 1

  for (const [key, value] of Object.entries(settings)) {
    if ((BIRD_SETTING_KEYS as readonly string[]).includes(key)) {
      bird[key as BirdSettingKey] = parseKnownValue(key as KnownSettingKey, value)
    } else if (key === 'revision_retention_minutes') {
      revision.revision_retention_minutes = parseKnownValue(
        key as RevisionSettingKey,
        value,
      )
    } else if ((RUNTIME_LOGS_SETTING_KEYS as readonly string[]).includes(key)) {
      const rk = key as RuntimeLogsSettingKey
      if (rk === 'runtime_logs_auto_enabled') {
        runtimeLogs.runtime_logs_auto_enabled =
          value === true || value === 1 || value === 'true' || value === '1'
            ? 'true'
            : 'false'
      } else if (rk === 'runtime_logs_auto_mode') {
        const m = String(value ?? '').trim()
        runtimeLogs.runtime_logs_auto_mode = m === 'delete' ? 'delete' : m === 'truncate' ? 'truncate' : ''
      } else {
        runtimeLogs[rk] = parseKnownValue(rk, value)
      }
    } else {
      additional.push({
        id: id++,
        key,
        value: typeof value === 'string' ? value : String(value),
      })
    }
  }

  return { bird, revision, runtimeLogs, additional }
}

export function buildPayload(
  keys: readonly KnownSettingKey[],
  form: Record<string, string>,
): Record<string, string | number | boolean> {
  const payload: Record<string, string | number | boolean> = {}
  for (const key of keys) {
    const value = String(form[key] ?? '').trim()
    if (BOOLEAN_SETTING_KEYS.has(key)) {
      payload[key] = value === 'true'
      continue
    }
    if (!value) continue
    if (NUMERIC_SETTING_KEYS.has(key)) payload[key] = Number(value)
    else payload[key] = value
  }
  return payload
}