import type {
  ExplainBusinessUnit,
  ExplainGuideStop,
  ExplainTrack,
  GuideLocationResolution,
  GuideLocationResolutionStatus,
  MediaAsset,
  MuseumExhibit,
  MuseumHall,
  AudioPlayTargetType
} from '@/domain/museum'
import {
  formatNavFloorLabel
} from '@/data/adapters/navAssetsAdapter'
import {
  normalizeSameOriginPublicUrl
} from '@/utils/publicUrl'
import {
  getExplainUnitPreviewImage
} from '@/utils/explainUnitPreviews'
import type {
  GuideStaticContentPayload,
  GuideStaticDataset,
  GuideStaticExplainDataset,
  GuideStaticExplainNavigationDataset,
  GuideStaticExhibitPayload,
  GuideStaticHallPayload,
  GuideStaticOutlinePayload,
  GuideStaticPoiBridgeEntryPayload,
  GuideStaticPoiPayload,
  GuideStaticStopPayload,
} from '@/data/providers/staticGuideDataProvider'

export interface GuideContentDataAdapterResult {
  halls: MuseumHall[]
  exhibits: MuseumExhibit[]
  tracks: ExplainTrack[]
  mediaAssets: MediaAsset[]
}

export interface GuideExplainNavigationAdapterResult {
  halls: MuseumHall[]
  guideStops: ExplainGuideStop[]
  businessUnitsByHallId: Record<string, ExplainBusinessUnit[]>
}

export interface GuideExplainDataAdapterResult {
  halls: MuseumHall[]
  exhibits: MuseumExhibit[]
  tracks: ExplainTrack[]
  mediaAssets: MediaAsset[]
  guideStops: ExplainGuideStop[]
  businessUnitsByHallId: Record<string, ExplainBusinessUnit[]>
  exhibitByStopId: Record<string, MuseumExhibit>
}

const stringifyId = (value: string | number | null | undefined) => (
  value === null || typeof value === 'undefined' ? undefined : String(value)
)

const isTruthyDeleted = (value: unknown) => value === true || value === 1 || value === '1'
const isEnabledStatus = (value: unknown) => value === undefined || value === null || value === true || value === 1 || value === '1'
const isVisibleRecord = (record: { deleted?: unknown; status?: unknown }) => (
  !isTruthyDeleted(record.deleted) && isEnabledStatus(record.status)
)

const compact = (values: Array<string | null | undefined>) => values
  .map((value) => value?.trim())
  .filter(Boolean) as string[]

const firstText = (...values: Array<string | null | undefined>) => (
  compact(values).find(Boolean) || ''
)

const parseJsonArray = (value: string | null | undefined): string[] => {
  if (!value) return []

  try {
    const parsed = JSON.parse(value)
    return Array.isArray(parsed)
      ? parsed.filter((item): item is string => typeof item === 'string' && item.trim().length > 0)
      : []
  } catch {
    return value.split(',').map((item) => item.trim()).filter(Boolean)
  }
}

const resolveImage = (...values: Array<string | null | undefined>) => normalizeSameOriginPublicUrl(firstText(
  ...values,
  ...values.flatMap(parseJsonArray)
))

const formatFloorId = (hall: GuideStaticHallPayload | undefined, poi?: GuideStaticPoiPayload) => (
  firstText(
    hall?.floorCode,
    stringifyId(hall?.floorId),
    stringifyId(poi?.floorId)
  ) || undefined
)

const formatFloorLabel = (floorId: string | undefined) => (
  floorId
    ? floorId.startsWith('L') ? formatNavFloorLabel(floorId) : floorId
    : undefined
)

const formatArea = (area?: number | null) => (
  typeof area === 'number' && Number.isFinite(area) ? `${area}㎡` : undefined
)

const locationActionText = (status: GuideLocationResolutionStatus) => {
  if (status === 'hallFallback') return '查看所属展厅'
  if (status === 'candidate') return '候选位置'
  if (status === 'exact') return '查看三维位置'
  return '暂无位置'
}

const locationNote = (status: GuideLocationResolutionStatus) => {
  if (status === 'hallFallback') return '当前展示所属展厅位置，展品精确点位待补充。'
  if (status === 'candidate') return '当前仅有候选点位，需人工确认后再用于正式位置预览。'
  if (status === 'exact') return '当前支持三维位置预览，馆内路线规划待开放。'
  return '暂无可用三维位置数据。'
}

const toLocationResolution = (
  entry: GuideStaticPoiBridgeEntryPayload | undefined,
  status: Exclude<GuideLocationResolutionStatus, 'unavailable'>,
  sourcePoiId?: string
): GuideLocationResolution | undefined => {
  const poiId = stringifyId(entry?.navPoiId)
  if (!poiId) return undefined

  const floorId = stringifyId(entry?.navFloorId)
  return {
    status,
    poiId,
    sourcePoiId: stringifyId(entry?.sourcePoiId) || sourcePoiId,
    actionText: locationActionText(status),
    previewOnly: true,
    confidence: entry?.confidence || undefined,
    method: entry?.method || undefined,
    floorId,
    floorLabel: formatFloorLabel(floorId),
    note: locationNote(status)
  }
}

const guideTargetKey = (guide: GuideStaticContentPayload) => {
  const targetType = guide.targetType?.toUpperCase()
  const targetId = stringifyId(guide.targetId)
  return targetType && targetId ? `${targetType}:${targetId}` : ''
}

const normalizeAudioTargetType = (targetType: string | null | undefined): AudioPlayTargetType | undefined => {
  const normalizedType = targetType?.toUpperCase()
  if (normalizedType === 'STOP' || normalizedType === 'ITEM') {
    return normalizedType
  }

  return undefined
}

const resolveAudioPlayTarget = (
  guide: GuideStaticContentPayload | undefined,
  exhibitId?: string
) => {
  const guideTargetType = normalizeAudioTargetType(guide?.targetType)
  const guideTargetId = stringifyId(guide?.targetId)

  if (guideTargetType && guideTargetId) {
    return {
      playTargetType: guideTargetType,
      playTargetId: guideTargetId
    }
  }

  return exhibitId
    ? {
      playTargetType: 'ITEM' as AudioPlayTargetType,
      playTargetId: exhibitId
    }
    : {}
}

const primaryAudioUrl = (guide: GuideStaticContentPayload) => normalizeSameOriginPublicUrl(firstText(
  guide.standardAudioUrl,
  guide.extendedAudioUrl,
  guide.audioUrl,
  guide.standardAudioUrlEn,
  guide.extendedAudioUrlEn
))

const primaryAudioDuration = (guide: GuideStaticContentPayload) => (
  guide.standardAudioDuration
  || guide.extendedAudioDuration
  || guide.audioDuration
  || guide.standardAudioDurationEn
  || guide.extendedAudioDurationEn
  || undefined
)

const primaryGuideText = (guide: GuideStaticContentPayload | undefined, exhibit: GuideStaticExhibitPayload) => firstText(
  guide?.standardText,
  guide?.extendedText,
  exhibit.description,
  exhibit.narrationText,
  guide?.standardTextEn,
  guide?.extendedTextEn,
  exhibit.descriptionEn
)

const toGuideLevelTags = (guide: GuideStaticContentPayload | undefined, exhibit: GuideStaticExhibitPayload) => {
  const parsedTags = parseJsonArray(guide?.aiTags)
  return compact([
    exhibit.category,
    exhibit.exhibitLevel,
    ...parsedTags,
    guide ? '真实讲解词' : '展品档案'
  ])
}

const visibleHallsFrom = (halls: GuideStaticHallPayload[]) => halls.filter(isVisibleRecord)
const visibleOutlinesFrom = (outlines: GuideStaticOutlinePayload[]) => outlines.filter((outline) => !isTruthyDeleted(outline.deleted))
const visibleStopsFrom = (stops: GuideStaticStopPayload[]) => stops.filter((stop) => !isTruthyDeleted(stop.deleted))
const visibleGuidesFrom = (guides: GuideStaticContentPayload[]) => guides.filter(isVisibleRecord)

const toHallModels = (
  sourceHalls: GuideStaticHallPayload[],
  hallExhibitCounts: Map<string, number>,
  hallBridgeById: Record<string, GuideStaticPoiBridgeEntryPayload>,
  sgsPoiBridgeById: Record<string, GuideStaticPoiBridgeEntryPayload>
) => sourceHalls.map((hall) => {
  const id = stringifyId(hall.id) || ''
  const sourcePoiId = stringifyId(hall.poiId)
  const bridgedHall = id ? toLocationResolution(hallBridgeById[id], 'exact', sourcePoiId) : undefined
  const location = bridgedHall || (() => {
    if (!sourcePoiId) return undefined
    return toLocationResolution(sgsPoiBridgeById[sourcePoiId], 'exact', sourcePoiId)
  })()
  const floorId = location?.floorId || formatFloorId(hall)
  const description = firstText(hall.description, hall.narrationText, hall.subtitle)

  return {
    id,
    name: hall.name || hall.hallCode || `展厅 ${id}`,
    floorId,
    floorLabel: formatFloorLabel(floorId),
    description,
    image: resolveImage(hall.coverImageUrl, hall.galleryUrls),
    exhibitCount: hallExhibitCounts.get(id) || hall.exhibitCount || 0,
    area: formatArea(hall.areaSqm),
    poiId: location?.poiId,
    location
  }
})

const toExplainBusinessUnitsByHallId = (
  stops: ExplainGuideStop[],
  topOutlines: Array<{ id: string; name: string; hallId: string; sort?: number }> = []
) => {
  const unitsByHallId: Record<string, ExplainBusinessUnit[]> = {}
  const stopGroupsByHall = new Map<string, Map<string, ExplainGuideStop[]>>()
  const unitNameByKey = new Map<string, string>()
  const unitOrderByKey = new Map<string, number>()

  topOutlines.forEach((outline) => {
    const hallGroups = stopGroupsByHall.get(outline.hallId) || new Map<string, ExplainGuideStop[]>()
    if (!hallGroups.has(outline.id)) {
      hallGroups.set(outline.id, [])
    }
    stopGroupsByHall.set(outline.hallId, hallGroups)
    unitNameByKey.set(`${outline.hallId}:${outline.id}`, outline.name)
    unitOrderByKey.set(`${outline.hallId}:${outline.id}`, outline.sort ?? 0)
  })

  stops
    .slice()
    .sort((a, b) => (a.sort ?? 0) - (b.sort ?? 0))
    .forEach((stop) => {
      const hallId = stop.hallId || ''
      if (!hallId) return

      const unitId = stop.outlineId || `ungrouped-${hallId}`
      const unitName = stop.outlineName || '其他讲解'
      const hallGroups = stopGroupsByHall.get(hallId) || new Map<string, ExplainGuideStop[]>()
      const groupStops = hallGroups.get(unitId) || []
      groupStops.push(stop)
      hallGroups.set(unitId, groupStops)
      stopGroupsByHall.set(hallId, hallGroups)
      if (!unitNameByKey.has(`${hallId}:${unitId}`)) {
        unitNameByKey.set(`${hallId}:${unitId}`, unitName)
      }
      if (!unitOrderByKey.has(`${hallId}:${unitId}`)) {
        unitOrderByKey.set(`${hallId}:${unitId}`, stop.sort ?? 0)
      }
    })

  stopGroupsByHall.forEach((groupMap, hallId) => {
    unitsByHallId[hallId] = Array.from(groupMap.entries())
      .map(([unitId, groupStops]) => ({
        id: unitId,
        name: unitNameByKey.get(`${hallId}:${unitId}`) || '其他讲解',
        hallId,
        previewImageUrl: getExplainUnitPreviewImage(unitId),
        guideStopCount: groupStops.length,
        stops: groupStops
      }))
      .sort((a, b) => (
        (unitOrderByKey.get(`${hallId}:${a.id}`) ?? 0) - (unitOrderByKey.get(`${hallId}:${b.id}`) ?? 0)
      ))
  })

  return unitsByHallId
}

const createExplainNavigationAdapter = (
  dataset: GuideStaticExplainNavigationDataset,
  hallGuideCounts = new Map<string, number>(),
  poiBridge: {
    hallToNavPoiId?: Record<string, GuideStaticPoiBridgeEntryPayload>
    sgsPoiToNavPoiId?: Record<string, GuideStaticPoiBridgeEntryPayload>
  } = {}
): GuideExplainNavigationAdapterResult => {
  const visibleHalls = visibleHallsFrom(dataset.halls)
  const visibleOutlines = visibleOutlinesFrom(dataset.outlines)
  const visibleStops = visibleStopsFrom(dataset.guideStops)
  const hallById = new Map(visibleHalls.map((hall) => [stringifyId(hall.id), hall]))
  const outlineById = new Map(visibleOutlines.map((outline) => [stringifyId(outline.id), outline]))
  const hallBridgeById = poiBridge.hallToNavPoiId || {}
  const sgsPoiBridgeById = poiBridge.sgsPoiToNavPoiId || {}

  const findHallForOutline = (outline: GuideStaticOutlinePayload | undefined) => {
    let current = outline
    let guard = 0

    while (current && guard < 16) {
      const parentId = stringifyId(current.parentId)
      if (parentId && hallById.has(parentId)) {
        return hallById.get(parentId)
      }

      current = parentId ? outlineById.get(parentId) : undefined
      guard += 1
    }

    return undefined
  }

  const findHallForStop = (stop: GuideStaticStopPayload | undefined) => (
    findHallForOutline(outlineById.get(stringifyId(stop?.outlineId)))
  )

  const findTopOutlineForStop = (stop: GuideStaticStopPayload | undefined) => {
    let current = outlineById.get(stringifyId(stop?.outlineId))
    let guard = 0

    while (current && guard < 16) {
      const parentId = stringifyId(current.parentId)
      if (parentId && hallById.has(parentId)) {
        return current
      }

      current = parentId ? outlineById.get(parentId) : undefined
      guard += 1
    }

    return outlineById.get(stringifyId(stop?.outlineId))
  }

  const topOutlines = visibleOutlines.flatMap((outline) => {
    const id = stringifyId(outline.id)
    const parentId = stringifyId(outline.parentId)
    if (!id || !parentId || !hallById.has(parentId)) return []

    return [{
      id,
      name: outline.name || `业务单元 ${id}`,
      hallId: parentId,
      sort: typeof outline.sort === 'number' ? outline.sort : undefined
    }]
  })

  const resolveHallLocation = (hall: GuideStaticHallPayload | undefined) => {
    const hallId = stringifyId(hall?.id)
    const sourcePoiId = stringifyId(hall?.poiId)
    const bridgedHall = hallId ? toLocationResolution(hallBridgeById[hallId], 'exact', sourcePoiId) : undefined
    if (bridgedHall) return bridgedHall

    return sourcePoiId ? toLocationResolution(sgsPoiBridgeById[sourcePoiId], 'exact', sourcePoiId) : undefined
  }

  const halls = toHallModels(visibleHalls, hallGuideCounts, hallBridgeById, sgsPoiBridgeById)
  const guideStops: ExplainGuideStop[] = visibleStops.map((stop) => {
    const topOutline = findTopOutlineForStop(stop)
    const hall = findHallForStop(stop)
    const location = resolveHallLocation(hall)
    const floorId = location?.floorId || formatFloorId(hall, undefined) || stop.floorCode || stringifyId(stop.floorId)

    return {
      id: stringifyId(stop.id) || '',
      name: firstText(stop.name) || `讲解点 ${stringifyId(stop.id) || ''}`,
      hallId: stringifyId(hall?.id),
      hallName: hall?.name || undefined,
      floorId,
      targetType: 'STOP',
      targetId: stringifyId(stop.id) || '',
      coverImageUrl: resolveImage(stop.coverImageUrl, hall?.coverImageUrl, hall?.galleryUrls),
      description: firstText(stop.name),
      hasAudio: Boolean(stop.audioUrl),
      poiId: location?.poiId,
      outlineId: stringifyId(topOutline?.id),
      outlineName: topOutline?.name || undefined,
      sort: typeof stop.sort === 'number' ? stop.sort : undefined
    }
  })

  return {
    halls,
    guideStops,
    businessUnitsByHallId: toExplainBusinessUnitsByHallId(guideStops, topOutlines)
  }
}

export const createGuideExplainNavigationAdapter = (
  dataset: GuideStaticExplainNavigationDataset
): GuideExplainNavigationAdapterResult => createExplainNavigationAdapter(dataset)

export const createGuideExplainDataAdapter = (dataset: GuideStaticExplainDataset): GuideExplainDataAdapterResult => {
  const visibleHalls = visibleHallsFrom(dataset.halls)
  const visibleOutlines = visibleOutlinesFrom(dataset.outlines)
  const visibleStops = visibleStopsFrom(dataset.guideStops)
  const visibleGuides = visibleGuidesFrom(dataset.guideContents)

  const hallById = new Map(visibleHalls.map((hall) => [stringifyId(hall.id), hall]))
  const outlineById = new Map(visibleOutlines.map((outline) => [stringifyId(outline.id), outline]))
  const stopById = new Map(visibleStops.map((stop) => [stringifyId(stop.id), stop]))
  const hallBridgeById = dataset.poiBridge?.hallToNavPoiId || {}
  const sgsPoiBridgeById = dataset.poiBridge?.sgsPoiToNavPoiId || {}

  const findHallForOutline = (outline: GuideStaticOutlinePayload | undefined) => {
    let current = outline
    let guard = 0

    while (current && guard < 16) {
      const parentId = stringifyId(current.parentId)
      if (parentId && hallById.has(parentId)) {
        return hallById.get(parentId)
      }

      current = parentId ? outlineById.get(parentId) : undefined
      guard += 1
    }

    return undefined
  }

  const findHallForStop = (stop: GuideStaticStopPayload | undefined) => (
    findHallForOutline(outlineById.get(stringifyId(stop?.outlineId)))
  )

  const findTopOutlineForStop = (stop: GuideStaticStopPayload | undefined) => {
    let current = outlineById.get(stringifyId(stop?.outlineId))
    let guard = 0

    while (current && guard < 16) {
      const parentId = stringifyId(current.parentId)
      if (parentId && hallById.has(parentId)) {
        return current
      }

      current = parentId ? outlineById.get(parentId) : undefined
      guard += 1
    }

    return outlineById.get(stringifyId(stop?.outlineId))
  }

  const topOutlines = visibleOutlines.flatMap((outline) => {
    const id = stringifyId(outline.id)
    const parentId = stringifyId(outline.parentId)
    if (!id || !parentId || !hallById.has(parentId)) return []

    return [{
      id,
      name: outline.name || `业务单元 ${id}`,
      hallId: parentId,
      sort: typeof outline.sort === 'number' ? outline.sort : undefined
    }]
  })

  const resolveHallLocation = (
    hall: GuideStaticHallPayload | undefined,
    status: Exclude<GuideLocationResolutionStatus, 'unavailable'>
  ) => {
    const hallId = stringifyId(hall?.id)
    const sourcePoiId = stringifyId(hall?.poiId)
    const bridgedHall = hallId ? toLocationResolution(hallBridgeById[hallId], status, sourcePoiId) : undefined
    if (bridgedHall) return bridgedHall

    return sourcePoiId ? toLocationResolution(sgsPoiBridgeById[sourcePoiId], status, sourcePoiId) : undefined
  }

  const resolveSgsPoiLocation = (
    sourcePoiIds: Array<string | number | null | undefined>,
    status: Exclude<GuideLocationResolutionStatus, 'unavailable'>
  ) => {
    for (const rawId of sourcePoiIds) {
      const sourcePoiId = stringifyId(rawId)
      if (!sourcePoiId) continue

      const location = toLocationResolution(sgsPoiBridgeById[sourcePoiId], status, sourcePoiId)
      if (location) return location
    }

    return undefined
  }

  const hallGuideCounts = new Map<string, number>()
  visibleGuides.forEach((guide) => {
    const stop = guide.targetType?.toUpperCase() === 'STOP'
      ? stopById.get(stringifyId(guide.targetId))
      : undefined
    const hall = findHallForStop(stop)
    const hallId = stringifyId(hall?.id)
    if (hallId) {
      hallGuideCounts.set(hallId, (hallGuideCounts.get(hallId) || 0) + 1)
    }
  })

  const halls = toHallModels(visibleHalls, hallGuideCounts, hallBridgeById, sgsPoiBridgeById)

  const guideStops: ExplainGuideStop[] = visibleStops.map((stop) => {
    const topOutline = findTopOutlineForStop(stop)
    const hall = findHallForStop(stop)
    const preciseLocation = resolveSgsPoiLocation([stop.poiId], 'exact')
    const location = preciseLocation || resolveHallLocation(hall, 'hallFallback')
    const floorId = location?.floorId || formatFloorId(hall, undefined) || stop.floorCode || stringifyId(stop.floorId)
    const stopGuide = visibleGuides.find((guide) => (
      guide.targetType?.toUpperCase() === 'STOP'
      && stringifyId(guide.targetId) === stringifyId(stop.id)
    ))

    return {
      id: stringifyId(stop.id) || '',
      name: firstText(stop.name, stopGuide?.title) || `讲解点 ${stringifyId(stop.id) || ''}`,
      hallId: stringifyId(hall?.id),
      hallName: hall?.name || undefined,
      floorId,
      targetType: 'STOP',
      targetId: stringifyId(stop.id) || '',
      coverImageUrl: resolveImage(stop.coverImageUrl, stopGuide?.mediaGallery, hall?.coverImageUrl, hall?.galleryUrls),
      description: firstText(stopGuide?.standardText, stopGuide?.extendedText, stop.name),
      hasAudio: stopGuide ? Boolean(primaryAudioUrl(stopGuide)) : Boolean(stop.audioUrl),
      poiId: location?.poiId,
      outlineId: stringifyId(topOutline?.id),
      outlineName: topOutline?.name || undefined,
      sort: typeof stop.sort === 'number' ? stop.sort : undefined
    }
  })
  const businessUnitsByHallId = toExplainBusinessUnitsByHallId(guideStops, topOutlines)

  const mediaAssets: MediaAsset[] = visibleGuides.map((guide) => {
    const id = `media-${stringifyId(guide.id) || 'unknown'}`
    const url = primaryAudioUrl(guide)
    const title = guide.title || '该讲解'

    return {
      id,
      type: 'audio',
      url: url || undefined,
      duration: primaryAudioDuration(guide),
      language: 'zh-CN',
      available: Boolean(url),
      unavailableReason: url ? undefined : `${title}暂无已发布音频，当前提供图文讲解。`
    }
  })
  const mediaByGuideId = new Map(mediaAssets.map((media) => [media.id.replace(/^media-/, ''), media]))

  const exhibits: MuseumExhibit[] = visibleGuides.map((guide) => {
    const id = stringifyId(guide.exhibitId) || `guide-${stringifyId(guide.id) || ''}`
    const guideId = stringifyId(guide.id) || ''
    const stop = guide.targetType?.toUpperCase() === 'STOP'
      ? stopById.get(stringifyId(guide.targetId))
      : undefined
    const outline = outlineById.get(stringifyId(stop?.outlineId))
    const hall = findHallForStop(stop)
    const sourcePoiId = stringifyId(guide.poiId || stop?.poiId || hall?.poiId)
    const preciseLocation = resolveSgsPoiLocation([guide.poiId, stop?.poiId], 'exact')
    const location = preciseLocation || resolveHallLocation(hall, 'hallFallback')
    const floorId = location?.floorId || formatFloorId(hall, undefined) || stop?.floorCode || stringifyId(stop?.floorId)
    const audioUrl = primaryAudioUrl(guide)
    const audioPlayTarget = resolveAudioPlayTarget(guide, id)
    const title = firstText(guide.title, stop?.name)?.replace(/\s*讲解\s*$/, '') || `讲解 ${guideId || id}`

    return {
      id,
      name: title,
      hallId: stringifyId(hall?.id),
      hallName: hall?.name || undefined,
      floorId,
      floorLabel: formatFloorLabel(floorId),
      image: resolveImage(stop?.coverImageUrl, guide.mediaGallery, hall?.coverImageUrl, hall?.galleryUrls),
      description: firstText(guide.standardText, guide.extendedText, stop?.name, guide.standardTextEn, guide.extendedTextEn),
      poiId: location?.poiId,
      sourcePoiId,
      location,
      tags: compact([
        hall?.name,
        outline?.name,
        guide.contentType || undefined,
        guide ? '真实讲解词' : undefined
      ]),
      guideContentId: guideId,
      guideTitle: guide.title || undefined,
      guideText: firstText(guide.standardText, guide.extendedText, guide.standardTextEn, guide.extendedTextEn) || undefined,
      audioUrl: audioUrl || undefined,
      audioDuration: primaryAudioDuration(guide),
      audioAvailable: Boolean(audioUrl),
      ...audioPlayTarget
    }
  })

  const exhibitByStopId = exhibits.reduce<Record<string, MuseumExhibit>>((result, exhibit) => {
    if (exhibit.playTargetType === 'STOP' && exhibit.playTargetId) {
      result[exhibit.playTargetId] = exhibit
    }
    return result
  }, {})

  const tracks: ExplainTrack[] = visibleGuides.map((guide) => {
    const id = stringifyId(guide.id) || ''
    const exhibitId = stringifyId(guide.exhibitId) || `guide-${id}`
    const stop = guide.targetType?.toUpperCase() === 'STOP'
      ? stopById.get(stringifyId(guide.targetId))
      : undefined
    const hall = findHallForStop(stop)
    const sourcePoiId = stringifyId(guide.poiId || stop?.poiId || hall?.poiId)
    const preciseLocation = resolveSgsPoiLocation([guide.poiId, stop?.poiId], 'exact')
    const location = preciseLocation || resolveHallLocation(hall, 'hallFallback')
    const floorId = location?.floorId || formatFloorId(hall, undefined) || stop?.floorCode || stringifyId(stop?.floorId)
    const media = mediaByGuideId.get(id)
    const audioPlayTarget = resolveAudioPlayTarget(guide, exhibitId)

    return {
      id: `track-${id}`,
      exhibitId,
      hallId: stringifyId(hall?.id),
      title: guide.title || stop?.name || `讲解 ${id}`,
      summary: firstText(guide.standardText, guide.extendedText, stop?.name),
      mediaId: media?.id,
      coverImage: resolveImage(stop?.coverImageUrl, guide.mediaGallery, hall?.coverImageUrl, hall?.galleryUrls),
      poiId: location?.poiId,
      sourcePoiId,
      location,
      floorId,
      available: media?.available === true,
      ...audioPlayTarget
    }
  })

  return {
    halls,
    exhibits,
    tracks,
    mediaAssets,
    guideStops,
    businessUnitsByHallId,
    exhibitByStopId
  }
}

export const createGuideContentDataAdapter = (dataset: GuideStaticDataset): GuideContentDataAdapterResult => {
  const visibleHalls = visibleHallsFrom(dataset.halls)
  const visibleOutlines = visibleOutlinesFrom(dataset.outlines)
  const visibleStops = visibleStopsFrom(dataset.guideStops)
  const visibleExhibits = dataset.exhibits.filter(isVisibleRecord)
  const visibleGuides = visibleGuidesFrom(dataset.guideContents)

  const hallById = new Map(visibleHalls.map((hall) => [stringifyId(hall.id), hall]))
  const outlineById = new Map(visibleOutlines.map((outline) => [stringifyId(outline.id), outline]))
  const stopById = new Map(visibleStops.map((stop) => [stringifyId(stop.id), stop]))
  const poiById = new Map(dataset.pois.map((poi) => [stringifyId(poi.id), poi]))
  const exhibitById = new Map(visibleExhibits.map((exhibit) => [stringifyId(exhibit.id), exhibit]))
  const hallBridgeById = dataset.poiBridge?.hallToNavPoiId || {}
  const sgsPoiBridgeById = dataset.poiBridge?.sgsPoiToNavPoiId || {}

  const resolveSgsPoiLocation = (
    sourcePoiIds: Array<string | number | null | undefined>,
    status: Exclude<GuideLocationResolutionStatus, 'unavailable'>
  ) => {
    for (const rawId of sourcePoiIds) {
      const sourcePoiId = stringifyId(rawId)
      if (!sourcePoiId) continue

      const location = toLocationResolution(sgsPoiBridgeById[sourcePoiId], status, sourcePoiId)
      if (location) return location
    }

    return undefined
  }

  const resolveHallLocation = (
    hall: GuideStaticHallPayload | undefined,
    status: Exclude<GuideLocationResolutionStatus, 'unavailable'>
  ) => {
    const hallId = stringifyId(hall?.id)
    const sourcePoiId = stringifyId(hall?.poiId)
    const bridgedHall = hallId ? toLocationResolution(hallBridgeById[hallId], status, sourcePoiId) : undefined

    return bridgedHall || resolveSgsPoiLocation([sourcePoiId], status)
  }

  const guideByExhibitId = new Map<string, GuideStaticContentPayload>()
  const guideByTarget = new Map<string, GuideStaticContentPayload>()
  for (const guide of visibleGuides) {
    const key = guideTargetKey(guide)
    if (key && !guideByTarget.has(key)) {
      guideByTarget.set(key, guide)
    }

    const exhibitId = stringifyId(guide.exhibitId)
    if (exhibitId && !guideByExhibitId.has(exhibitId)) {
      guideByExhibitId.set(exhibitId, guide)
    }

    if (guide.targetType?.toUpperCase() === 'ITEM') {
      const targetId = stringifyId(guide.targetId)
      if (targetId && !guideByExhibitId.has(targetId)) {
        guideByExhibitId.set(targetId, guide)
      }
    }
  }

  const hallExhibitCounts = new Map<string, number>()
  for (const exhibit of visibleExhibits) {
    const hallId = stringifyId(exhibit.hallId)
    if (hallId) {
      hallExhibitCounts.set(hallId, (hallExhibitCounts.get(hallId) || 0) + 1)
    }
  }

  const halls = toHallModels(visibleHalls, hallExhibitCounts, hallBridgeById, sgsPoiBridgeById)

  const exhibits: MuseumExhibit[] = visibleExhibits.map((exhibit) => {
    const id = stringifyId(exhibit.id) || ''
    const hall = hallById.get(stringifyId(exhibit.hallId))
    const outline = outlineById.get(stringifyId(exhibit.outlineId))
    const stop = stopById.get(stringifyId(exhibit.stopId))
    const itemGuide = guideByExhibitId.get(id)
    const stopGuide = stop ? guideByTarget.get(`STOP:${stringifyId(stop.id)}`) : undefined
    const guide = itemGuide || stopGuide
    const audioUrl = guide ? primaryAudioUrl(guide) : ''
    const audioPlayTarget = resolveAudioPlayTarget(guide, id)
    const sourcePoiId = stringifyId(exhibit.poiId || stop?.poiId || guide?.poiId || hall?.poiId)
    const sourcePoi = sourcePoiId ? poiById.get(sourcePoiId) : undefined
    const preciseLocation = resolveSgsPoiLocation([exhibit.poiId, stop?.poiId, guide?.poiId], 'exact')
    const location = preciseLocation || resolveHallLocation(hall, 'hallFallback')
    const floorId = location?.floorId || formatFloorId(hall, sourcePoi)
    const description = primaryGuideText(guide, exhibit)

    return {
      id,
      name: exhibit.name || exhibit.exhibitCode || guide?.title || `展品 ${id}`,
      hallId: stringifyId(exhibit.hallId),
      hallName: hall?.name || undefined,
      floorId,
      floorLabel: formatFloorLabel(floorId),
      image: resolveImage(exhibit.coverImageUrl, exhibit.galleryUrls, guide?.mediaGallery),
      description,
      poiId: location?.poiId,
      sourcePoiId,
      location,
      year: exhibit.era || undefined,
      material: exhibit.origin || undefined,
      size: exhibit.exhibitCode || exhibit.dimensions || undefined,
      tags: compact([
        hall?.name,
        outline?.name,
        stop?.name,
        ...toGuideLevelTags(guide, exhibit)
      ]),
      guideContentId: stringifyId(guide?.id),
      guideTitle: guide?.title || undefined,
      guideText: description || undefined,
      audioUrl: audioUrl || undefined,
      audioDuration: guide ? primaryAudioDuration(guide) : undefined,
      audioAvailable: Boolean(audioUrl),
      ...audioPlayTarget
    }
  })

  const mediaAssets: MediaAsset[] = visibleGuides.map((guide) => {
    const id = `media-${stringifyId(guide.id) || 'unknown'}`
    const url = primaryAudioUrl(guide)
    const title = guide.title || '该讲解'

    return {
      id,
      type: 'audio',
      url: url || undefined,
      duration: primaryAudioDuration(guide),
      language: 'zh-CN',
      available: Boolean(url),
      unavailableReason: url ? undefined : `${title}暂无已发布音频，当前提供图文讲解。`
    }
  })

  const mediaByGuideId = new Map(mediaAssets.map((media) => [media.id.replace(/^media-/, ''), media]))
  const tracks: ExplainTrack[] = visibleGuides.map((guide) => {
    const id = stringifyId(guide.id) || ''
    const targetType = guide.targetType?.toUpperCase()
    const targetId = stringifyId(guide.targetId)
    const exhibit = stringifyId(guide.exhibitId)
      ? exhibitById.get(stringifyId(guide.exhibitId))
      : targetType === 'ITEM' && targetId ? exhibitById.get(targetId) : undefined
    const stop = targetType === 'STOP' && targetId ? stopById.get(targetId) : undefined
    const hall = exhibit ? hallById.get(stringifyId(exhibit.hallId)) : undefined
    const sourcePoiId = stringifyId(exhibit?.poiId || stop?.poiId || guide.poiId || hall?.poiId)
    const sourcePoi = sourcePoiId ? poiById.get(sourcePoiId) : undefined
    const preciseLocation = resolveSgsPoiLocation([exhibit?.poiId, stop?.poiId, guide.poiId], 'exact')
    const location = preciseLocation || resolveHallLocation(hall, 'hallFallback')
    const floorId = location?.floorId || formatFloorId(hall, sourcePoi)
    const media = mediaByGuideId.get(id)
    const audioPlayTarget = resolveAudioPlayTarget(guide, stringifyId(exhibit?.id))

    return {
      id: `track-${id}`,
      exhibitId: stringifyId(exhibit?.id),
      hallId: stringifyId(hall?.id),
      title: guide.title || exhibit?.name || stop?.name || `讲解 ${id}`,
      summary: firstText(guide.standardText, guide.extendedText, exhibit?.description, stop?.name),
      mediaId: media?.id,
      coverImage: resolveImage(exhibit?.coverImageUrl, exhibit?.galleryUrls, stop?.coverImageUrl, guide.mediaGallery),
      poiId: location?.poiId,
      sourcePoiId,
      location,
      floorId,
      available: media?.available === true,
      ...audioPlayTarget
    }
  })

  return {
    halls,
    exhibits,
    tracks,
    mediaAssets
  }
}