import type { SteadyDataView } from '@/api/steady/steadyDataView/interface'

export const CHECKSQUARE_STAT_TYPES: SteadyDataView.SteadyTrendStatType[] = ['AVG', 'MAX', 'MIN', 'CP95']
export const CHECKSQUARE_HARMONIC_ORDER_MIN = 2
export const CHECKSQUARE_HARMONIC_ORDER_MAX = 50
export const CHECKSQUARE_HARMONIC_ORDERS = Array.from(
    { length: CHECKSQUARE_HARMONIC_ORDER_MAX - CHECKSQUARE_HARMONIC_ORDER_MIN + 1 },
    (_item, index) => index + CHECKSQUARE_HARMONIC_ORDER_MIN
)
const CHECKSQUARE_STAT_LABEL_MAP: Record<SteadyDataView.SteadyTrendStatType, string> = {
    AVG: '平均值',
    MAX: '最大值',
    MIN: '最小值',
    CP95: 'CP95'
}

export const formatChecksquareStatType = (statType: SteadyDataView.SteadyTrendStatType | string) => {
    return CHECKSQUARE_STAT_LABEL_MAP[statType as SteadyDataView.SteadyTrendStatType] || statType
}

export const formatBooleanText = (value?: boolean | null) => {
    if (value === null || value === undefined) return '-'

    return value ? '是' : '否'
}

export const formatDataIntegrity = (value?: number | null, text?: string | null) => {
    if (text) return text
    const integrityValue = value === null || value === undefined || !Number.isFinite(Number(value)) ? null : Number(value)

    if (integrityValue === null) return '-'

    return `${(integrityValue * 100).toFixed(2)}%`
}

export const findStatSummary = (
    item: SteadyDataView.SteadyChecksquareItem,
    statType: SteadyDataView.SteadyTrendStatType
) => {
    return item.statSummaries?.find(summary => summary.statType === statType)
}

export const formatStatMissingRate = (
    item: SteadyDataView.SteadyChecksquareItem,
    statType: SteadyDataView.SteadyTrendStatType
) => {
    const summary = findStatSummary(item, statType)
    if (!summary || summary.supported === false) return '-'

    return formatDataIntegrity(summary.dataIntegrity, summary.dataIntegrityText)
}

export const resolveChecksquareRowName = (item: SteadyDataView.SteadyChecksquareItem) => {
    const progressText = getHarmonicProgressText(item)
    if (progressText) return `${item.indicatorName || item.indicatorCode}（${progressText}）`
    if (!item.harmonicOrder) return item.indicatorName || item.indicatorCode

    return `${item.harmonicOrder}次`
}

export const getHarmonicProgressText = (item: SteadyDataView.SteadyChecksquareItem) => {
    const children = item.children || []
    if (!children.length || !children.some(child => child.harmonicOrder)) return ''

    const totalCount = children.length
    const resolvedCount = children.filter(child => isResolvedChecksquareItem(child)).length
    if (resolvedCount >= totalCount) return ''

    return `已完成 ${resolvedCount}/${totalCount}`
}

export const collectMissingSegments = (item: SteadyDataView.SteadyChecksquareItem | null) => {
    if (!item) return []

    return (item.statDetails || []).flatMap(detail =>
        (detail.segments || [])
            .filter(segment => segment.status === 'MISSING')
            .map(segment => ({
                ...segment,
                statType: detail.statType
            }))
    )
}

export const hasChecksquareDetail = (item: SteadyDataView.SteadyChecksquareItem) => {
    return (
        Boolean(item.itemId) ||
        Boolean(item.abnormalPointCount) ||
        Boolean(item.harmonicParityAbnormalPointCount) ||
        Boolean(item.missingPointCount) ||
        (item.statDetails || []).some(detail => (detail.segments || []).length)
    )
}

const hasChecksquareHarmonicOrderRange = (indicator: SteadyDataView.SteadyIndicatorNode) => {
    const start = Number(indicator.harmonicOrderStart)
    const end = Number(indicator.harmonicOrderEnd)
    if (!Number.isFinite(start) || !Number.isFinite(end)) return false

    const rangeStart = Math.min(start, end)
    const rangeEnd = Math.max(start, end)

    return rangeStart <= CHECKSQUARE_HARMONIC_ORDER_MAX && rangeEnd >= CHECKSQUARE_HARMONIC_ORDER_MIN
}

export const isChecksquareHarmonicIndicator = (indicator: SteadyDataView.SteadyIndicatorNode) => {
    // 只有指标目录明确包含 2-50 次谐波范围时，才预建谐波子行并执行逐次合并。
    return hasChecksquareHarmonicOrderRange(indicator)
}

export const buildPendingChecksquareItem = (
    indicator: SteadyDataView.SteadyIndicatorNode
): SteadyDataView.SteadyChecksquareItem => {
    const indicatorCode = indicator.indicatorCode || indicator.id || indicator.treeKey || indicator.name

    return {
        itemKey: `pending|${indicatorCode}`,
        indicatorCode,
        indicatorName: indicator.name || indicatorCode,
        children: isChecksquareHarmonicIndicator(indicator) ? buildPendingChecksquareHarmonicItems(indicator) : undefined,
        statSummaries: [],
        statDetails: []
    }
}

export const buildPendingChecksquareHarmonicItems = (
    indicator: SteadyDataView.SteadyIndicatorNode
): SteadyDataView.SteadyChecksquareItem[] => {
    const indicatorCode = indicator.indicatorCode || indicator.id || indicator.treeKey || indicator.name

    return CHECKSQUARE_HARMONIC_ORDERS.map(harmonicOrder => ({
        itemKey: `pending|${indicatorCode}|${harmonicOrder}`,
        indicatorCode,
        indicatorName: indicator.name || indicatorCode,
        harmonicOrder,
        statSummaries: [],
        statDetails: []
    }))
}

export const buildPendingChecksquareResult = (
    indicators: SteadyDataView.SteadyIndicatorNode[],
    formState: { timeRange: string[] }
): SteadyDataView.SteadyChecksquareQueryResult => {
    return {
        lineId: '',
        timeStart: formState.timeRange[0] || '',
        timeEnd: formState.timeRange[1] || '',
        items: indicators.map(buildPendingChecksquareItem)
    }
}

const isResolvedChecksquareItem = (item: SteadyDataView.SteadyChecksquareItem) => {
    return item.hasData !== undefined || item.expectedPointCount !== undefined || item.actualPointCount !== undefined
}

const normalizeChecksquareResultItemKey = (
    item: SteadyDataView.SteadyChecksquareItem,
    itemKey: string
): SteadyDataView.SteadyChecksquareItem => ({
    ...item,
    itemKey
})

const isValidChecksquareHarmonicOrder = (value: number) => {
    return Number.isInteger(value) && CHECKSQUARE_HARMONIC_ORDERS.includes(value)
}

const parseChecksquareHarmonicOrder = (value?: string | number | null) => {
    const order = Number(value)

    return isValidChecksquareHarmonicOrder(order) ? order : null
}

const parseChecksquareHarmonicOrderFromText = (value?: string | null) => {
    if (!value) return null

    const orderText = value.match(/(?:^|[^\d])([2-9]|[1-4]\d|50)(?:次|[^\d]|$)/)?.[1]

    return parseChecksquareHarmonicOrder(orderText)
}

const resolveChecksquareHarmonicOrder = (item: SteadyDataView.SteadyChecksquareItem) => {
    return (
        parseChecksquareHarmonicOrder(item.harmonicOrder) ||
        parseChecksquareHarmonicOrderFromText(item.itemKey) ||
        parseChecksquareHarmonicOrderFromText(item.indicatorName) ||
        parseChecksquareHarmonicOrderFromText(item.indicatorCode)
    )
}

const sumNumber = (
    items: SteadyDataView.SteadyChecksquareItem[],
    getter: (item: SteadyDataView.SteadyChecksquareItem) => unknown
) => {
    return items.reduce((total, item) => {
        const value = Number(getter(item))

        return Number.isFinite(value) ? total + value : total
    }, 0)
}

const summarizeStatType = (
    items: SteadyDataView.SteadyChecksquareItem[],
    statType: SteadyDataView.SteadyTrendStatType
): SteadyDataView.SteadyChecksquareStatSummary => {
    const summaries = items
        .map(item => findStatSummary(item, statType))
        .filter((summary): summary is SteadyDataView.SteadyChecksquareStatSummary => Boolean(summary))
    const supportedSummaries = summaries.filter(summary => summary.supported !== false)
    const expectedPointCount = supportedSummaries.reduce((total, summary) => total + (summary.expectedPointCount || 0), 0)
    const actualPointCount = supportedSummaries.reduce((total, summary) => total + (summary.actualPointCount || 0), 0)
    const missingPointCount = supportedSummaries.reduce((total, summary) => total + (summary.missingPointCount || 0), 0)

    return {
        statType,
        supported: supportedSummaries.length > 0,
        hasData: supportedSummaries.length > 0 && supportedSummaries.every(summary => summary.hasData === true),
        expectedPointCount,
        actualPointCount,
        missingPointCount,
        dataIntegrity: expectedPointCount ? actualPointCount / expectedPointCount : null,
        dataIntegrityText: expectedPointCount ? undefined : '-'
    }
}

export const buildHarmonicParentSummary = (
    parentItem: SteadyDataView.SteadyChecksquareItem,
    children: SteadyDataView.SteadyChecksquareItem[]
): SteadyDataView.SteadyChecksquareItem => {
    if (!children.length || !children.every(item => isResolvedChecksquareItem(item))) {
        return {
            itemKey: parentItem.itemKey,
            indicatorCode: parentItem.indicatorCode,
            indicatorName: parentItem.indicatorName,
            statSummaries: [],
            statDetails: [],
            children
        }
    }

    const expectedPointCount = sumNumber(children, item => item.expectedPointCount)
    const actualPointCount = sumNumber(children, item => item.actualPointCount)
    const missingPointCount = sumNumber(children, item => item.missingPointCount)
    const statSummaries = CHECKSQUARE_STAT_TYPES.map(statType => summarizeStatType(children, statType))

    return {
        ...parentItem,
        hasData: children.every(item => item.hasData === true),
        expectedPointCount,
        actualPointCount,
        missingPointCount,
        dataIntegrity: expectedPointCount ? actualPointCount / expectedPointCount : null,
        dataIntegrityText: expectedPointCount ? undefined : '-',
        statSummaries,
        statDetails: [],
        children
    }
}

export const mergeChecksquareIndicatorResult = (
    currentResult: SteadyDataView.SteadyChecksquareQueryResult | null,
    indicator: SteadyDataView.SteadyIndicatorNode,
    indicatorResult: SteadyDataView.SteadyChecksquareQueryResult
): SteadyDataView.SteadyChecksquareQueryResult => {
    const pendingResult = currentResult || {
        lineId: indicatorResult.lineId || '',
        lineName: indicatorResult.lineName,
        timeStart: indicatorResult.timeStart || '',
        timeEnd: indicatorResult.timeEnd || '',
        intervalMinutes: indicatorResult.intervalMinutes,
        items: [buildPendingChecksquareItem(indicator)]
    }
    const indicatorCode = indicator.indicatorCode
    const resultItems = indicatorResult.items || []
    const shouldMergeHarmonicItems = isChecksquareHarmonicIndicator(indicator)
    const normalItems = shouldMergeHarmonicItems
        ? resultItems.filter(item => !resolveChecksquareHarmonicOrder(item))
        : resultItems
    const harmonicItems = shouldMergeHarmonicItems
        ? resultItems.filter(item => resolveChecksquareHarmonicOrder(item))
        : []
    const currentItem = pendingResult.items.find(item => item.indicatorCode === indicatorCode)
    const mergedItem = normalItems[0] || currentItem || buildPendingChecksquareItem(indicator)
    const currentChildren = currentItem?.children || mergedItem.children || []
    const mergedChildren = currentChildren.length
        ? currentChildren.map(child => {
              const replacement = harmonicItems.find(item => resolveChecksquareHarmonicOrder(item) === child.harmonicOrder)

              return replacement
                  ? normalizeChecksquareResultItemKey(
                        {
                            ...replacement,
                            harmonicOrder: child.harmonicOrder
                        },
                        child.itemKey
                    )
                  : child
          })
        : harmonicItems
    const replacement = {
        ...mergedItem,
        itemKey: currentItem?.itemKey || mergedItem.itemKey,
        indicatorName: indicator.name || mergedItem.indicatorName || mergedItem.indicatorCode,
        children: mergedChildren.length ? mergedChildren : undefined
    } as SteadyDataView.SteadyChecksquareItem
    const finalReplacement = replacement.children?.length ? buildHarmonicParentSummary(replacement, replacement.children) : replacement

    return {
        ...pendingResult,
        lineId: indicatorResult.lineId || pendingResult.lineId,
        lineName: indicatorResult.lineName || pendingResult.lineName,
        timeStart: indicatorResult.timeStart || pendingResult.timeStart,
        timeEnd: indicatorResult.timeEnd || pendingResult.timeEnd,
        intervalMinutes: indicatorResult.intervalMinutes ?? pendingResult.intervalMinutes,
        items: pendingResult.items.map(item => (item.indicatorCode === indicatorCode ? finalReplacement : item))
    }
}