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import React, {
createContext,
useCallback,
useContext,
useMemo,
useReducer,
useRef,
useState,
} from 'react'
import type { Tutorial, TutorialEvent, TutorialStep, UIState } from '../../types/tutorial'
import {
generateUnifiedInstructionSequence,
type UnifiedStepData,
} from '../../utils/unifiedStepGenerator'
// Exact same interfaces from TutorialPlayer.tsx
interface TutorialPlayerState {
currentStepIndex: number
currentValue: number
isStepCompleted: boolean
error: string | null
events: TutorialEvent[]
stepStartTime: number
multiStepStartTime: number // Track when current multi-step started
uiState: UIState
currentMultiStep: number // Current step within multi-step instructions (0-based)
}
interface ExpectedStep {
index: number
stepIndex: number
targetValue: number
startValue: number
description: string
mathematicalTerm?: string // Pedagogical term like "10", "(5 - 1)", "-6"
termPosition?: { startIndex: number; endIndex: number } // Position in full decomposition
}
type TutorialPlayerAction =
| {
type: 'INITIALIZE_STEP'
stepIndex: number
startValue: number
stepId: string
}
| {
type: 'USER_VALUE_CHANGE'
oldValue: number
newValue: number
stepId: string
}
| { type: 'COMPLETE_STEP'; stepId: string }
| { type: 'SET_ERROR'; error: string | null }
| { type: 'ADD_EVENT'; event: TutorialEvent }
| { type: 'UPDATE_UI_STATE'; updates: Partial<UIState> }
| { type: 'ADVANCE_MULTI_STEP' }
| { type: 'PREVIOUS_MULTI_STEP' }
| { type: 'RESET_MULTI_STEP' }
// Exact same reducer from TutorialPlayer.tsx
function tutorialPlayerReducer(
state: TutorialPlayerState,
action: TutorialPlayerAction
): TutorialPlayerState {
switch (action.type) {
case 'INITIALIZE_STEP':
return {
...state,
currentStepIndex: action.stepIndex,
currentValue: action.startValue,
isStepCompleted: false,
error: null,
stepStartTime: Date.now(),
multiStepStartTime: Date.now(), // Start timing for first multi-step
currentMultiStep: 0, // Reset to first multi-step
events: [
...state.events,
{
type: 'STEP_STARTED',
stepId: action.stepId,
timestamp: new Date(),
},
],
}
case 'USER_VALUE_CHANGE':
return {
...state,
currentValue: action.newValue,
events: [
...state.events,
{
type: 'VALUE_CHANGED',
stepId: action.stepId,
oldValue: action.oldValue,
newValue: action.newValue,
timestamp: new Date(),
},
],
}
case 'COMPLETE_STEP':
return {
...state,
isStepCompleted: true,
error: null,
events: [
...state.events,
{
type: 'STEP_COMPLETED',
stepId: action.stepId,
success: true,
timestamp: new Date(),
},
],
}
case 'SET_ERROR':
return {
...state,
error: action.error,
}
case 'ADD_EVENT':
return {
...state,
events: [...state.events, action.event],
}
case 'UPDATE_UI_STATE':
return {
...state,
uiState: { ...state.uiState, ...action.updates },
}
case 'ADVANCE_MULTI_STEP':
return {
...state,
currentMultiStep: state.currentMultiStep + 1,
multiStepStartTime: Date.now(), // Reset timer for new multi-step
}
case 'PREVIOUS_MULTI_STEP':
return {
...state,
currentMultiStep: Math.max(0, state.currentMultiStep - 1),
}
case 'RESET_MULTI_STEP':
return {
...state,
currentMultiStep: 0,
}
default:
return state
}
}
// Context interfaces
interface TutorialContextType {
state: TutorialPlayerState
dispatch: React.Dispatch<TutorialPlayerAction>
tutorial: Tutorial
isProgrammaticChange: React.MutableRefObject<boolean>
showHelpForCurrentStep: boolean
setShowHelpForCurrentStep: React.Dispatch<React.SetStateAction<boolean>>
beadRefs: React.MutableRefObject<Map<string, SVGElement>>
// Computed values
currentStep: TutorialStep
expectedSteps: ExpectedStep[]
fullDecomposition: string
unifiedSteps: UnifiedStepData[] // NEW: Add unified steps with provenance
customStyles: any
// Term-to-column highlighting state
activeTermIndices: Set<number>
setActiveTermIndices: (indices: Set<number>) => void
activeIndividualTermIndex: number | null
setActiveIndividualTermIndex: (index: number | null) => void
activeGroupTargetColumn: number | null
setActiveGroupTargetColumn: (columnIndex: number | null) => void
getColumnFromTermIndex: (termIndex: number, useGroupColumn?: boolean) => number | null
getTermIndicesFromColumn: (columnIndex: number) => number[]
getGroupTermIndicesFromTermIndex: (termIndex: number) => number[]
handleAbacusColumnHover: (columnIndex: number, isHovering: boolean) => void
// Action functions
goToStep: (stepIndex: number) => void
goToNextStep: () => void
goToPreviousStep: () => void
handleValueChange: (newValue: number) => void
advanceMultiStep: () => void
previousMultiStep: () => void
resetMultiStep: () => void
handleBeadClick: (beadInfo: any) => void
handleBeadRef: (bead: any, element: SVGElement | null) => void
toggleDebugPanel: () => void
toggleStepList: () => void
toggleAutoAdvance: () => void
notifyEvent: (event: TutorialEvent) => void
getCurrentStepBeads: () => any[]
getCurrentStepSummary: () => any
renderHighlightedDecomposition: () => any
}
interface TutorialProviderProps {
tutorial: Tutorial
initialStepIndex?: number
showDebugPanel?: boolean
onStepChange?: (stepIndex: number, step: TutorialStep) => void
onStepComplete?: (stepIndex: number, step: TutorialStep, success: boolean) => void
onTutorialComplete?: (score: number, timeSpent: number) => void
onEvent?: (event: TutorialEvent) => void
children: React.ReactNode
}
// Create context
const TutorialContext = createContext<TutorialContextType | null>(null)
// Provider component
export function TutorialProvider({
tutorial,
initialStepIndex = 0,
showDebugPanel = false,
onStepChange,
onStepComplete,
onTutorialComplete,
onEvent,
children,
}: TutorialProviderProps) {
const isProgrammaticChange = useRef(false)
const [showHelpForCurrentStep, setShowHelpForCurrentStep] = useState(false)
const beadRefs = useRef<Map<string, SVGElement>>(new Map())
// Term-to-column highlighting state
const [activeTermIndices, setActiveTermIndices] = useState<Set<number>>(new Set())
const [activeIndividualTermIndex, setActiveIndividualTermIndex] = useState<number | null>(null)
const [activeGroupTargetColumn, setActiveGroupTargetColumn] = useState<number | null>(null)
const [state, dispatch] = useReducer(tutorialPlayerReducer, {
currentStepIndex: initialStepIndex,
currentValue: 0,
isStepCompleted: false,
error: null,
events: [],
stepStartTime: Date.now(),
multiStepStartTime: Date.now(),
currentMultiStep: 0,
uiState: {
isPlaying: true,
isPaused: false,
isEditing: false,
showDebugPanel,
showStepList: false,
autoAdvance: false,
playbackSpeed: 1,
},
})
// Initialize the first step on mount
React.useEffect(() => {
if (tutorial.steps.length > 0) {
const step = tutorial.steps[initialStepIndex]
// Mark as programmatic change to prevent AbacusReact feedback loop
isProgrammaticChange.current = true
dispatch({
type: 'INITIALIZE_STEP',
stepIndex: initialStepIndex,
startValue: step.startValue,
stepId: step.id,
})
onStepChange?.(initialStepIndex, step)
}
}, [initialStepIndex, onStepChange, tutorial.steps.length, tutorial.steps[initialStepIndex]]) // Empty dependency array - only run on mount
// Current step and computed values
const currentStep = tutorial.steps[state.currentStepIndex]
const { expectedSteps, fullDecomposition, unifiedSteps } = useMemo(() => {
try {
const unifiedSequence = generateUnifiedInstructionSequence(
currentStep.startValue,
currentStep.targetValue
)
// Map UnifiedStepData to ExpectedStep format
const mappedSteps: ExpectedStep[] = unifiedSequence.steps.map((step, index) => ({
index,
stepIndex: step.stepIndex,
targetValue: step.expectedValue,
startValue:
index === 0 ? currentStep.startValue : unifiedSequence.steps[index - 1].expectedValue,
description: step.englishInstruction,
mathematicalTerm: step.mathematicalTerm,
termPosition: step.termPosition,
}))
return {
expectedSteps: mappedSteps,
fullDecomposition: unifiedSequence.fullDecomposition,
unifiedSteps: unifiedSequence.steps, // NEW: Include raw steps with provenance
}
} catch (error) {
console.warn('Failed to generate unified sequence:', error)
return { expectedSteps: [], fullDecomposition: '', unifiedSteps: [] }
}
}, [currentStep.startValue, currentStep.targetValue])
// Term-to-column mapping function
const getColumnFromTermIndex = useCallback(
(termIndex: number, useGroupColumn = false) => {
const step = unifiedSteps[termIndex]
if (!step?.provenance) return null
// For group highlighting: use rhsPlace (target column)
// For individual highlighting: use termPlace (individual term column)
const placeValue = useGroupColumn
? step.provenance.rhsPlace
: (step.provenance.termPlace ?? step.provenance.rhsPlace)
// Convert place value (0=ones, 1=tens, 2=hundreds) to columnIndex (4=ones, 3=tens, 2=hundreds)
return 4 - placeValue
},
[unifiedSteps]
)
// Column-to-terms mapping function (for bidirectional interaction)
const getTermIndicesFromColumn = useCallback(
(columnIndex: number) => {
const termIndices: number[] = []
unifiedSteps.forEach((step, index) => {
if (step.provenance) {
// Use termPlace if available, otherwise fallback to rhsPlace
const placeValue = step.provenance.termPlace ?? step.provenance.rhsPlace
const stepColumnIndex = 4 - placeValue
if (stepColumnIndex === columnIndex) {
termIndices.push(index)
}
}
})
return termIndices
},
[unifiedSteps]
)
// Group-to-terms mapping function (for complement groups)
const getGroupTermIndicesFromTermIndex = useCallback(
(termIndex: number) => {
console.log('🔍 getGroupTermIndicesFromTermIndex called with termIndex:', termIndex)
const step = unifiedSteps[termIndex]
console.log(' - Step data:', {
mathematicalTerm: step?.mathematicalTerm,
hasProvenance: !!step?.provenance,
groupId: step?.provenance?.groupId,
rhsPlace: step?.provenance?.rhsPlace,
rhsValue: step?.provenance?.rhsValue,
})
if (!step?.provenance?.groupId) {
console.log(' - No groupId found, returning empty array')
return []
}
const groupId = step.provenance.groupId
console.log(' - Found groupId:', groupId)
const groupTermIndices: number[] = []
unifiedSteps.forEach((groupStep, index) => {
if (groupStep.provenance?.groupId === groupId) {
groupTermIndices.push(index)
console.log(
` - Found group member: term ${index} "${groupStep.mathematicalTerm}" (rhsPlace: ${groupStep.provenance.rhsPlace})`
)
}
})
console.log(' - Final group term indices:', groupTermIndices)
return groupTermIndices
},
[unifiedSteps]
)
// Abacus column hover handler for bidirectional interaction
const handleAbacusColumnHover = useCallback(
(columnIndex: number, isHovering: boolean) => {
if (isHovering) {
// Find all terms that correspond to this column
const relatedTerms = getTermIndicesFromColumn(columnIndex)
setActiveTermIndices(new Set(relatedTerms))
} else {
setActiveTermIndices(new Set())
}
},
[getTermIndicesFromColumn]
)
// Navigation state
const navigationState = useMemo(
() => ({
canGoNext: state.currentStepIndex < tutorial.steps.length - 1,
canGoPrevious: state.currentStepIndex > 0,
}),
[state.currentStepIndex, tutorial.steps.length]
)
// Action functions
const notifyEvent = useCallback(
(event: TutorialEvent) => {
onEvent?.(event)
},
[onEvent]
)
const goToStep = useCallback(
(stepIndex: number) => {
if (stepIndex >= 0 && stepIndex < tutorial.steps.length) {
const step = tutorial.steps[stepIndex]
// Mark as programmatic change to prevent AbacusReact feedback loop
isProgrammaticChange.current = true
dispatch({
type: 'INITIALIZE_STEP',
stepIndex,
startValue: step.startValue,
stepId: step.id,
})
onStepChange?.(stepIndex, step)
}
},
[tutorial.steps, onStepChange]
)
// Clear isProgrammaticChange flag after external value changes have settled
React.useEffect(() => {
// Use a small timeout to ensure the AbacusReact has processed the value change
const timeoutId = setTimeout(() => {
if (isProgrammaticChange.current) {
isProgrammaticChange.current = false
}
}, 100)
return () => clearTimeout(timeoutId)
}, [])
const goToNextStep = useCallback(() => {
if (navigationState.canGoNext) {
goToStep(state.currentStepIndex + 1)
} else if (state.isStepCompleted && state.currentStepIndex === tutorial.steps.length - 1) {
// On the last step and step is completed - trigger tutorial completion
const startTime =
state.events.length > 0 ? new Date(state.events[0].timestamp).getTime() : Date.now() - 60000 // fallback to 1 minute ago
const timeSpent = Math.round((Date.now() - startTime) / 1000)
// Calculate score based on completed steps (100% for completing all steps)
const score = 100
onTutorialComplete?.(score, timeSpent)
}
}, [
navigationState.canGoNext,
goToStep,
state.currentStepIndex,
state.isStepCompleted,
state.events,
tutorial.steps.length,
onTutorialComplete,
])
const goToPreviousStep = useCallback(() => {
if (navigationState.canGoPrevious) {
goToStep(state.currentStepIndex - 1)
}
}, [navigationState.canGoPrevious, goToStep, state.currentStepIndex])
const handleValueChange = useCallback(
(newValue: number) => {
if (isProgrammaticChange.current) {
isProgrammaticChange.current = false
return
}
const oldValue = state.currentValue
dispatch({
type: 'USER_VALUE_CHANGE',
oldValue,
newValue,
stepId: currentStep.id,
})
// Check if step is completed
if (newValue === currentStep.targetValue) {
dispatch({
type: 'COMPLETE_STEP',
stepId: currentStep.id,
})
onStepComplete?.(state.currentStepIndex, currentStep, true)
}
},
[state.currentValue, currentStep, onStepComplete, state.currentStepIndex]
)
const handleBeadClick = useCallback(
(beadInfo: any) => {
dispatch({
type: 'ADD_EVENT',
event: {
type: 'BEAD_CLICKED',
stepId: currentStep.id,
timestamp: new Date(),
beadInfo,
},
})
},
[currentStep.id]
)
const handleBeadRef = useCallback((bead: any, element: SVGElement | null) => {
const key = `${bead.placeValue}-${bead.type}-${bead.position}`
if (element) {
beadRefs.current.set(key, element)
} else {
beadRefs.current.delete(key)
}
}, [])
const toggleDebugPanel = useCallback(() => {
dispatch({
type: 'UPDATE_UI_STATE',
updates: { showDebugPanel: !state.uiState.showDebugPanel },
})
}, [state.uiState.showDebugPanel])
const toggleStepList = useCallback(() => {
dispatch({
type: 'UPDATE_UI_STATE',
updates: { showStepList: !state.uiState.showStepList },
})
}, [state.uiState.showStepList])
const toggleAutoAdvance = useCallback(() => {
dispatch({
type: 'UPDATE_UI_STATE',
updates: { autoAdvance: !state.uiState.autoAdvance },
})
}, [state.uiState.autoAdvance])
const advanceMultiStep = useCallback(() => {
dispatch({ type: 'ADVANCE_MULTI_STEP' })
}, [])
const previousMultiStep = useCallback(() => {
dispatch({ type: 'PREVIOUS_MULTI_STEP' })
}, [])
const resetMultiStep = useCallback(() => {
dispatch({ type: 'RESET_MULTI_STEP' })
}, [])
const getCurrentStepBeads = useCallback(() => {
if (expectedSteps.length === 0) return currentStep.stepBeadHighlights || []
if (state.currentMultiStep < expectedSteps.length) {
// Since we mapped from UnifiedStepData, we need to get the original step data
// to access beadMovements. For now, fall back to existing stepBeadHighlights
return currentStep.stepBeadHighlights || []
}
return []
}, [expectedSteps, currentStep.stepBeadHighlights, state.currentMultiStep])
const getCurrentStepSummary = useCallback(() => {
if (expectedSteps.length === 0) return null
if (state.currentMultiStep < expectedSteps.length) {
const currentExpectedStep = expectedSteps[state.currentMultiStep]
return {
description: currentExpectedStep.description,
mathematicalTerm: currentExpectedStep.mathematicalTerm,
termPosition: currentExpectedStep.termPosition,
}
}
return null
}, [expectedSteps, state.currentMultiStep])
const renderHighlightedDecomposition = useCallback(() => {
if (!fullDecomposition || expectedSteps.length === 0) return null
const currentExpectedStep = expectedSteps[state.currentMultiStep]
if (!currentExpectedStep?.termPosition) return fullDecomposition
const { startIndex, endIndex } = currentExpectedStep.termPosition
const before = fullDecomposition.slice(0, startIndex)
const highlighted = fullDecomposition.slice(startIndex, endIndex + 1)
const after = fullDecomposition.slice(endIndex + 1)
return { before, highlighted, after }
}, [fullDecomposition, expectedSteps, state.currentMultiStep])
const customStyles = useMemo(() => {
if (!currentStep.highlightBeads || !Array.isArray(currentStep.highlightBeads)) {
return undefined
}
return {
beads: currentStep.highlightBeads.reduce((acc, highlight) => {
const columnIndex = 4 - highlight.placeValue
if (!acc[columnIndex]) {
acc[columnIndex] = {}
}
if (highlight.beadType === 'heaven') {
acc[columnIndex].heaven = {
backgroundColor: '#ffeb3b',
border: '2px solid #ff9800',
}
} else if (highlight.beadType === 'earth') {
if (!acc[columnIndex].earth) {
acc[columnIndex].earth = {}
}
const position = highlight.position || 0
acc[columnIndex].earth[position] = {
backgroundColor: '#ffeb3b',
border: '2px solid #ff9800',
}
}
return acc
}, {} as any),
}
}, [currentStep.highlightBeads])
const value: TutorialContextType = {
state,
dispatch,
tutorial,
isProgrammaticChange,
showHelpForCurrentStep,
setShowHelpForCurrentStep,
beadRefs,
// Computed values
currentStep,
expectedSteps,
fullDecomposition,
unifiedSteps,
customStyles,
// Term-to-column highlighting state
activeTermIndices,
setActiveTermIndices,
activeIndividualTermIndex,
setActiveIndividualTermIndex,
activeGroupTargetColumn,
setActiveGroupTargetColumn,
getColumnFromTermIndex,
getTermIndicesFromColumn,
getGroupTermIndicesFromTermIndex,
handleAbacusColumnHover,
// Action functions
goToStep,
goToNextStep,
goToPreviousStep,
handleValueChange,
advanceMultiStep,
previousMultiStep,
resetMultiStep,
handleBeadClick,
handleBeadRef,
toggleDebugPanel,
toggleStepList,
toggleAutoAdvance,
notifyEvent,
getCurrentStepBeads,
getCurrentStepSummary,
renderHighlightedDecomposition,
}
return <TutorialContext.Provider value={value}>{children}</TutorialContext.Provider>
}
// Hook to use the context
export function useTutorialContext() {
const context = useContext(TutorialContext)
if (!context) {
throw new Error('useTutorialContext must be used within a TutorialProvider')
}
return context
}
// Custom hooks for convenient access to specific context parts
export function useTutorialState() {
const { state } = useTutorialContext()
return state
}
export function useTutorialData() {
const { tutorial, currentStep, expectedSteps, fullDecomposition } = useTutorialContext()
return { tutorial, currentStep, expectedSteps, fullDecomposition }
}
export function useTutorialActions() {
const {
goToStep,
goToNextStep,
goToPreviousStep,
handleValueChange,
handleBeadClick,
handleBeadRef,
toggleDebugPanel,
toggleStepList,
toggleAutoAdvance,
notifyEvent,
} = useTutorialContext()
return {
goToStep,
goToNextStep,
goToPreviousStep,
handleValueChange,
handleBeadClick,
handleBeadRef,
toggleDebugPanel,
toggleStepList,
toggleAutoAdvance,
notifyEvent,
}
}
export function useTutorialHelpers() {
const {
getCurrentStepBeads,
getCurrentStepSummary,
renderHighlightedDecomposition,
customStyles,
} = useTutorialContext()
return {
getCurrentStepBeads,
getCurrentStepSummary,
renderHighlightedDecomposition,
customStyles,
}
}
export function useTutorialRefs() {
const { isProgrammaticChange, beadRefs, showHelpForCurrentStep, setShowHelpForCurrentStep } =
useTutorialContext()
return {
isProgrammaticChange,
beadRefs,
showHelpForCurrentStep,
setShowHelpForCurrentStep,
}
}
// Export types for use in other components
export type { TutorialPlayerState, TutorialPlayerAction, ExpectedStep }
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