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import type React from 'react'
import { createContext, useContext, useEffect, useMemo } from 'react'
import { ReasonTooltip } from './ReasonTooltip'
import { useTutorialContext } from './TutorialContext'
import { useTutorialUI } from './TutorialUIContext'
import './decomposition-reasoning.css'
import type {
PedagogicalRule,
SegmentDecision,
PedagogicalSegment,
} from '@/utils/unifiedStepGenerator'
export type { PedagogicalRule, SegmentDecision, PedagogicalSegment }
export interface TermReason {
termIndex: number
segmentId: string
rule: PedagogicalRule
shortReason: string
bullets?: string[]
}
// Context for tracking active terms to highlight related segments
interface DecompositionContextType {
activeTerms: Set<number>
activeSegmentId: string | null
addActiveTerm: (termIndex: number, segmentId?: string) => void
removeActiveTerm: (termIndex: number, segmentId?: string) => void
}
const DecompositionContext = createContext<DecompositionContextType>({
activeTerms: new Set(),
activeSegmentId: null,
addActiveTerm: () => {},
removeActiveTerm: () => {},
})
interface DecompositionWithReasonsProps {
fullDecomposition: string
termPositions: Array<{ startIndex: number; endIndex: number }>
segments?: PedagogicalSegment[]
termReasons?: TermReason[]
// NOTE: steps now comes from tutorial context, not props
}
interface TermSpanProps {
termIndex: number
text: string
segment?: PedagogicalSegment
reason?: TermReason
isCurrentStep?: boolean
}
function TermSpan({ termIndex, text, segment, reason, isCurrentStep = false }: TermSpanProps) {
const { activeSegmentId, addActiveTerm, removeActiveTerm } = useContext(DecompositionContext)
const rule = reason?.rule ?? segment?.plan[0]?.rule
// Only show styling for terms that have pedagogical reasoning
if (!rule) {
return <span className="term term--plain">{text}</span>
}
// Determine CSS classes based on current step only
const cssClasses = [
'term',
isCurrentStep && 'term--current', // New class for current step highlighting
]
.filter(Boolean)
.join(' ')
// Individual term hover handlers for two-level highlighting
const handleTermHover = (isHovering: boolean) => {
if (isHovering) {
addActiveTerm(termIndex, segment?.id)
} else {
removeActiveTerm(termIndex, segment?.id)
}
}
return (
<span
className={cssClasses}
onMouseEnter={() => handleTermHover(true)}
onMouseLeave={() => handleTermHover(false)}
style={{ cursor: 'pointer' }}
>
{text}
</span>
)
}
// Component for rendering a segment group with unified hover target
interface SegmentGroupProps {
segment: PedagogicalSegment
fullDecomposition: string
termPositions: Array<{ startIndex: number; endIndex: number }>
termReasons?: TermReason[]
children: React.ReactNode
}
function SegmentGroup({ segment, fullDecomposition, children }: SegmentGroupProps) {
const { addActiveTerm, removeActiveTerm } = useContext(DecompositionContext)
// Get steps from tutorial context instead of props
const { unifiedSteps: steps } = useTutorialContext()
// Calculate the original term that was expanded
// digit * 10^place gives us the original value (e.g., digit=5, place=1 -> 50)
const originalValue = (segment.digit * 10 ** segment.place).toString()
// Get provenance from the first step in this segment
const firstStepIndex = segment.termIndices[0]
const firstStep = steps[firstStepIndex]
const provenance = firstStep?.provenance
const handleHighlightChange = (active: boolean) => {
// Only handle highlighting, let HoverCard manage its own open/close timing
if (active) {
segment.termIndices.forEach((termIndex) => addActiveTerm(termIndex, segment.id))
} else {
segment.termIndices.forEach((termIndex) => removeActiveTerm(termIndex, segment.id))
}
}
return (
<ReasonTooltip
termIndex={segment.termIndices[0]} // Use first term for tooltip ID
segment={segment}
originalValue={originalValue}
steps={steps}
provenance={provenance} // NEW: Pass provenance data
>
<span
className="segment-group"
onMouseEnter={() => handleHighlightChange(true)}
onMouseLeave={() => handleHighlightChange(false)}
>
{children}
</span>
</ReasonTooltip>
)
}
export function DecompositionWithReasons({
fullDecomposition,
termPositions,
segments,
termReasons,
}: DecompositionWithReasonsProps) {
// Get context state including term highlighting
const {
state,
activeTermIndices,
setActiveTermIndices,
activeIndividualTermIndex,
setActiveIndividualTermIndex,
getGroupTermIndicesFromTermIndex,
unifiedSteps,
} = useTutorialContext()
const currentStepIndex = state.currentMultiStep
const ui = useTutorialUI()
// Build segment boundaries and ranges
const _segmentRanges = useMemo(() => {
if (!segments) return []
return segments
.map((seg) => ({
segment: seg,
startIndex: Math.min(
...seg.termIndices.map((i) => termPositions[i]?.startIndex ?? Infinity)
),
endIndex: Math.max(...seg.termIndices.map((i) => termPositions[i]?.endIndex ?? 0)),
}))
.sort((a, b) => a.startIndex - b.startIndex)
}, [segments, termPositions])
// Build a quick lookup: termIndex -> segment
const termIndexToSegment = useMemo(() => {
const map = new Map<number, PedagogicalSegment>()
segments?.forEach((seg) => seg.termIndices.forEach((i) => map.set(i, seg)))
return map
}, [segments])
// Update active segment in UI context based on current step
useEffect(() => {
const currentSegment = termIndexToSegment.get(currentStepIndex) || null
ui.setActiveSegment(currentSegment)
}, [currentStepIndex, termIndexToSegment, ui])
// Determine which segment should be highlighted based on active terms
const activeSegmentId = useMemo(() => {
if (activeTermIndices.size === 0) return null
// Find the segment that contains any of the active terms
for (const termIndex of activeTermIndices) {
const segment = termIndexToSegment.get(termIndex)
if (segment) {
return segment.id
}
}
return null
}, [activeTermIndices, termIndexToSegment])
const addActiveTerm = (termIndex: number, _segmentId?: string) => {
console.log('🎯 TERM HOVER START - termIndex:', termIndex)
// Debug: Get the unified steps to see provenance data
const hoveredStep = unifiedSteps[termIndex]
console.log('📊 Hovered step data:', {
termIndex,
mathematicalTerm: hoveredStep?.mathematicalTerm,
provenance: hoveredStep?.provenance,
hasGroupId: !!hoveredStep?.provenance?.groupId,
groupId: hoveredStep?.provenance?.groupId,
rhsPlace: hoveredStep?.provenance?.rhsPlace,
rhsValue: hoveredStep?.provenance?.rhsValue,
})
// Set individual term highlight (orange glow)
setActiveIndividualTermIndex(termIndex)
console.log('🟠 Set individual term highlight:', termIndex)
// Set group term highlights (blue glow) - for complement groups, highlight only the target column
const groupTermIndices = getGroupTermIndicesFromTermIndex(termIndex)
console.log('🔵 Group term indices found:', groupTermIndices)
if (groupTermIndices.length > 0) {
// Debug: Log all terms in the group
console.log('📝 All terms in group:')
groupTermIndices.forEach((idx) => {
const step = unifiedSteps[idx]
console.log(
` - Term ${idx}: "${step?.mathematicalTerm}" (termPlace: ${step?.provenance?.termPlace}, rhsPlace: ${step?.provenance?.rhsPlace}, groupId: ${step?.provenance?.groupId})`
)
})
// For complement groups, highlight only the target column (rhsPlace, not individual termPlaces)
// Use any term from the group since they all share the same rhsPlace (target column)
setActiveTermIndices(new Set([termIndex]))
console.log(
'🎯 Set group highlight for target column (rhsPlace) using term index:',
termIndex
)
} else {
// This is a standalone term, just highlight it
setActiveTermIndices(new Set([termIndex]))
console.log('🎯 Set standalone term highlight')
}
console.log('✅ TERM HOVER COMPLETE')
}
const removeActiveTerm = (termIndex: number, _segmentId?: string) => {
console.log('🚫 TERM HOVER END - termIndex:', termIndex)
// Clear individual term highlight
setActiveIndividualTermIndex(null)
console.log('🟠 Cleared individual term highlight')
// Clear group term highlights
setActiveTermIndices(new Set())
console.log('🔵 Cleared group term highlights')
}
// Slice the decomposition string using termPositions
const _pieces: React.ReactNode[] = []
const _cursor = 0
// Render elements with segment groupings
const renderElements = () => {
const elements: React.ReactNode[] = []
let cursor = 0
const _currentSegmentIndex = 0
for (let termIndex = 0; termIndex < termPositions.length; termIndex++) {
const { startIndex, endIndex } = termPositions[termIndex]
const segment = termIndexToSegment.get(termIndex)
const reason = termReasons?.find((r) => r.termIndex === termIndex)
// Add connector text before this term
if (cursor < startIndex) {
elements.push(
<span key={`connector-${cursor}`}>{fullDecomposition.slice(cursor, startIndex)}</span>
)
}
// Check if this term starts a new segment
if (segment && segment.termIndices[0] === termIndex) {
// This is the first term of a segment - wrap all segment terms
const segmentElements: React.ReactNode[] = []
let segmentCursor = startIndex
for (const segTermIndex of segment.termIndices) {
const segPos = termPositions[segTermIndex]
if (!segPos) continue
// Add connector within segment
if (segmentCursor < segPos.startIndex) {
segmentElements.push(
<span key={`seg-connector-${segmentCursor}`}>
{fullDecomposition.slice(segmentCursor, segPos.startIndex)}
</span>
)
}
const segText = fullDecomposition.slice(segPos.startIndex, segPos.endIndex)
const segReason = termReasons?.find((r) => r.termIndex === segTermIndex)
segmentElements.push(
<TermSpan
key={`seg-term-${segTermIndex}`}
termIndex={segTermIndex}
text={segText}
segment={segment}
reason={segReason}
isCurrentStep={segTermIndex === currentStepIndex}
/>
)
segmentCursor = segPos.endIndex
}
elements.push(
<SegmentGroup
key={`segment-${segment.id}`}
segment={segment}
fullDecomposition={fullDecomposition}
termPositions={termPositions}
termReasons={termReasons}
>
{segmentElements}
</SegmentGroup>
)
// Skip ahead past all terms in this segment
const lastSegTermIndex = segment.termIndices[segment.termIndices.length - 1]
const lastSegPos = termPositions[lastSegTermIndex]
cursor = lastSegPos?.endIndex ?? endIndex
termIndex = lastSegTermIndex // Will be incremented by for loop
} else if (!segment) {
// Regular term not in a segment
const termText = fullDecomposition.slice(startIndex, endIndex)
elements.push(
<TermSpan
key={`term-${termIndex}`}
termIndex={termIndex}
text={termText}
segment={segment}
reason={reason}
isCurrentStep={termIndex === currentStepIndex}
/>
)
cursor = endIndex
}
// If this term is part of a segment but not the first, it was already handled above
}
// Add trailing text
if (cursor < fullDecomposition.length) {
elements.push(<span key="trailing">{fullDecomposition.slice(cursor)}</span>)
}
return elements
}
return (
<DecompositionContext.Provider
value={{
activeTerms: activeTermIndices,
activeSegmentId,
addActiveTerm,
removeActiveTerm,
}}
>
<div className="decomposition">{renderElements()}</div>
</DecompositionContext.Provider>
)
}
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