Press n or j to go to the next uncovered block, b, p or k for the previous block.
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ExecutableFlowchart, FlowchartState, ProblemValue, DecisionNode, CheckpointNode, } from '@/lib/flowcharts/schema' import { useVisualDebugSafe } from '@/contexts/VisualDebugContext' import { initializeState, getNextNode, isDecisionCorrect, validateCheckpoint, applyStateUpdate, applyWorkingProblemUpdate, advanceState, isTerminal, formatProblemDisplay, createContextFromState, applyTransforms, } from '@/lib/flowcharts/loader' import { evaluate } from '@/lib/flowcharts/evaluator' import { css } from '../../../styled-system/css' import { vstack, hstack } from '../../../styled-system/patterns' import { FlowchartNodeContent } from './FlowchartNodeContent' import { FlowchartCheckpoint } from './FlowchartCheckpoint' import { FlowchartPhaseRail } from './FlowchartPhaseRail' import { FlowchartDecisionGraph } from './FlowchartDecisionGraph' import { MathDisplay } from './MathDisplay' import { TimeMachineHistory } from './TimeMachineHistory' import { DebugStepTimeline } from './DebugStepTimeline' import { DebugMermaidDiagram } from './DebugMermaidDiagram' // ============================================================================= // Types // ============================================================================= type WalkerPhase = | { type: 'showingNode' } | { type: 'awaitingDecision' } | { type: 'awaitingCheckpoint' } | { type: 'checkpointFeedback' correct: boolean expected: ProblemValue | [number, number] userAnswer: ProblemValue | [number, number] } | { type: 'complete' } /** Track wrong decision for feedback (includes attempt counter to re-trigger animations) */ interface WrongDecisionState { value: string correctValue: string attempt: number } interface FlowchartWalkerProps { flowchart: ExecutableFlowchart problemInput: Record<string, ProblemValue> onComplete?: (state: FlowchartState) => void /** Called when user wants to try a different problem (same flowchart) */ onRestart?: () => void /** Called when user wants to go back to problem selection */ onChangeProblem?: () => void } // ============================================================================= // Component // ============================================================================= /** * FlowchartWalker - Main component for walking through a flowchart step by step. * * Manages state, navigation, and validation as the user progresses through * instruction, decision, and checkpoint nodes. */ export function FlowchartWalker({ flowchart, problemInput, onComplete, onRestart, onChangeProblem, }: FlowchartWalkerProps) { // Initialize state and apply transforms for entry node const [state, setState] = useState<FlowchartState>(() => { const initialState = initializeState(flowchart, problemInput) // Apply transforms for the entry node return applyTransforms(initialState, initialState.currentNode, flowchart) }) const [phase, setPhase] = useState<WalkerPhase>({ type: 'showingNode' }) const [wrongAttempts, setWrongAttempts] = useState(0) const [wrongDecision, setWrongDecision] = useState<WrongDecisionState | null>(null) // History stack for back navigation (stores full state snapshots) const [stateHistory, setStateHistory] = useState<FlowchartState[]>([]) // Redo stack for forward navigation (when user goes back) const [redoStack, setRedoStack] = useState<FlowchartState[]>([]) // Track checked checklist items for the current node const [checkedItems, setCheckedItems] = useState<Set<number>>(new Set()) // Debug mode: pause auto-advance to inspect nodes const [autoAdvancePaused, setAutoAdvancePaused] = useState(false) // Feedback state for wrong decision answers const [showDecisionFeedback, setShowDecisionFeedback] = useState(false) // Track browser history depth for this walker session const historyDepthRef = useRef(0) // Flag to prevent double-handling when we programmatically go back const isNavigatingBackRef = useRef(false) // Visual debug mode const { isVisualDebugEnabled } = useVisualDebugSafe() // Create logger that is enabled when visual debug mode is on const logger = useMemo( () => new Logger({ enabled: isVisualDebugEnabled, minLevel: 'info', }), [isVisualDebugEnabled] ) // Log state changes when visual debug mode is enabled useEffect(() => { logger.info('State snapshots updated', { snapshots: state.snapshots }) logger.info('Accumulated values', { values: state.values }) }, [logger, state.snapshots, state.values]) // Current node const currentNode = useMemo( () => flowchart.nodes[state.currentNode], [flowchart.nodes, state.currentNode] ) // Check if current node has an interactive checklist const currentChecklist = currentNode?.content?.checklist const hasInteractiveChecklist = currentNode?.definition.type === 'instruction' && currentChecklist && currentChecklist.length > 0 // Build timeline steps for visual debug mode const timelineSteps = useMemo(() => { if (!isVisualDebugEnabled) return [] const steps: Array<{ state: FlowchartState; nodeTitle: string }> = [] // Add states from history (past steps) for (const s of stateHistory) { const node = flowchart.nodes[s.currentNode] steps.push({ state: s, nodeTitle: node?.content?.title || s.currentNode, }) } // Add current state steps.push({ state, nodeTitle: currentNode?.content?.title || state.currentNode, }) // Add states from redo stack (future steps) - reversed so oldest redo is first for (const s of redoStack.slice().reverse()) { const node = flowchart.nodes[s.currentNode] steps.push({ state: s, nodeTitle: node?.content?.title || s.currentNode, }) } return steps }, [isVisualDebugEnabled, stateHistory, state, redoStack, flowchart.nodes, currentNode]) // Reset checked items when node changes useEffect(() => { setCheckedItems(new Set()) }, [state.currentNode]) // Handle wrong decision feedback timer useEffect(() => { if (wrongDecision) { setShowDecisionFeedback(true) const timer = setTimeout(() => setShowDecisionFeedback(false), 1500) return () => clearTimeout(timer) } }, [wrongDecision?.attempt]) // Browser history integration - allow back button to go to previous step useEffect(() => { const handlePopState = () => { // If we have history to go back to, go back if (historyDepthRef.current > 0 && stateHistory.length > 0) { historyDepthRef.current-- isNavigatingBackRef.current = true // Push current state to redo stack before going back setState((currentState) => { setRedoStack((prev) => [...prev, currentState]) return currentState }) const previousState = stateHistory[stateHistory.length - 1] setStateHistory((prev) => prev.slice(0, -1)) setState(previousState) setPhase({ type: 'showingNode' }) setWrongAttempts(0) setWrongDecision(null) setCheckedItems(new Set()) isNavigatingBackRef.current = false } else if (historyDepthRef.current === 0) { // At the beginning - let browser handle it (go to problem selection) // Push a dummy state to prevent actually navigating away, then call onChangeProblem if (onChangeProblem) { onChangeProblem() } } } window.addEventListener('popstate', handlePopState) return () => window.removeEventListener('popstate', handlePopState) }, [stateHistory, onChangeProblem]) // Problem display const problemDisplay = formatProblemDisplay(flowchart, state.problem) // ============================================================================= // Navigation // ============================================================================= const advanceToNext = useCallback( (userChoice?: string, userInput?: ProblemValue, correct?: boolean) => { const nextNodeId = getNextNode(flowchart, state, userChoice) if (!nextNodeId) { // No next node - might be terminal if (isTerminal(flowchart, state.currentNode)) { setPhase({ type: 'complete' }) onComplete?.(state) } return } const action = currentNode?.definition.type === 'decision' ? 'decision' : currentNode?.definition.type === 'checkpoint' ? 'checkpoint' : 'advance' // Save current state to history before advancing setStateHistory((prev) => [...prev, state]) // Clear redo stack - user has made a new choice, branching invalidates redo setRedoStack([]) // Push browser history entry so back button works historyDepthRef.current++ window.history.pushState({ flowchartStep: historyDepthRef.current }, '') // Apply working problem update if configured (before advancing) let stateWithWorkingProblem = state if (correct !== false) { stateWithWorkingProblem = applyWorkingProblemUpdate( state, state.currentNode, flowchart, userInput ) } // Advance state to next node let newState = advanceState(stateWithWorkingProblem, nextNodeId, action, userInput, correct) // Apply transforms for the new node (new unified computation model) newState = applyTransforms(newState, nextNodeId, flowchart) logger.info('Advancing to node', { from: state.currentNode, to: nextNodeId, action, userInput, correct, values: newState.values, }) setState(newState) setPhase({ type: 'showingNode' }) setWrongAttempts(0) setWrongDecision(null) // Check if new node is terminal if (isTerminal(flowchart, nextNodeId)) { // If auto-advance is paused, don't auto-complete - let user inspect the terminal node if (!autoAdvancePaused) { setTimeout(() => { setPhase({ type: 'complete' }) onComplete?.(newState) }, 500) } } }, [flowchart, state, currentNode, onComplete, autoAdvancePaused, logger] ) // Auto-advance for embellishment and milestone nodes // Using useEffect ensures proper cleanup and prevents multiple timeouts on re-renders useEffect(() => { if (!currentNode || autoAdvancePaused) return const nodeType = currentNode.definition.type if (nodeType === 'embellishment') { const timer = setTimeout(() => advanceToNext(), 800) return () => clearTimeout(timer) } else if (nodeType === 'milestone') { const timer = setTimeout(() => advanceToNext(), 500) return () => clearTimeout(timer) } }, [currentNode, autoAdvancePaused, advanceToNext]) // Go back to the previous step (uses browser history so back button stays in sync) const goBack = useCallback(() => { if (stateHistory.length === 0 || historyDepthRef.current === 0) { // No history - go back to problem selection onChangeProblem?.() return } // Use browser's back to trigger popstate, which handles the state update window.history.back() }, [stateHistory, onChangeProblem]) // Go forward to the next step (from redo stack) - for visual debug mode const goForward = useCallback(() => { if (redoStack.length === 0) return // Push current state to history setStateHistory((prev) => [...prev, state]) // Pop next state from redo stack const nextState = redoStack[redoStack.length - 1] setRedoStack((prev) => prev.slice(0, -1)) setState(nextState) setPhase({ type: 'showingNode' }) setWrongAttempts(0) setWrongDecision(null) setCheckedItems(new Set()) historyDepthRef.current++ window.history.pushState({ flowchartStep: historyDepthRef.current }, '') }, [redoStack, state]) // Navigate to a specific step in the full timeline (for visual debug mode) // The timeline is: stateHistory + [current] + redoStack (reversed) const navigateToHistoryStep = useCallback( (targetIndex: number) => { // Build full timeline: stateHistory + [current] + redoStack (reversed) const fullTimeline = [...stateHistory, state, ...redoStack.slice().reverse()] const currentIndex = stateHistory.length if (targetIndex === currentIndex) return // Already there if (targetIndex < 0 || targetIndex >= fullTimeline.length) return const targetState = fullTimeline[targetIndex] if (!targetState) return // Calculate new stateHistory (everything before target) const newHistory = fullTimeline.slice(0, targetIndex) // Calculate new redoStack (everything after target, reversed back) const newRedo = fullTimeline.slice(targetIndex + 1).reverse() setStateHistory(newHistory) setRedoStack(newRedo) setState(targetState) setPhase({ type: 'showingNode' }) setWrongAttempts(0) setWrongDecision(null) setCheckedItems(new Set()) // Update browser history depth to match historyDepthRef.current = targetIndex window.history.replaceState({ flowchartStep: historyDepthRef.current }, '') }, [stateHistory, state, redoStack] ) // Debug skip - auto-advance through the current node (for visual debug mode) // For decision nodes: picks the first option // For checkpoint nodes: computes and submits the correct answer // For instruction nodes: just advances const debugSkipStep = useCallback(() => { if (!currentNode) return const def = currentNode.definition switch (def.type) { case 'instruction': case 'milestone': case 'embellishment': // Just advance advanceToNext() break case 'decision': { // Pick the first option const decisionDef = def as DecisionNode if (decisionDef.options.length > 0) { const firstOption = decisionDef.options[0] advanceToNext(firstOption.value, firstOption.value, true) } break } case 'checkpoint': { // Compute the correct answer and submit it const checkpointDef = def as CheckpointNode try { const context = createContextFromState(state) if (checkpointDef.inputType === 'two-numbers' && Array.isArray(checkpointDef.expected)) { // Two-number checkpoint const twoNumberAnswer: [number, number] = [ evaluate(checkpointDef.expected[0], context) as number, evaluate(checkpointDef.expected[1], context) as number, ] const newState = applyStateUpdate( state, state.currentNode, flowchart, twoNumberAnswer as unknown as ProblemValue ) setState(newState) advanceToNext(undefined, twoNumberAnswer as unknown as ProblemValue, true) } else if (typeof checkpointDef.expected === 'string') { // Single value checkpoint - expected is a string expression const correctAnswer = evaluate(checkpointDef.expected, context) as number const newState = applyStateUpdate(state, state.currentNode, flowchart, correctAnswer) setState(newState) advanceToNext(undefined, correctAnswer, true) } else { // Shouldn't reach here, but just advance if we do advanceToNext() } } catch { // If we can't compute the answer, just try to advance advanceToNext() } break } case 'terminal': // Complete setPhase({ type: 'complete' }) onComplete?.(state) break default: advanceToNext() } }, [currentNode, state, flowchart, advanceToNext, onComplete]) // Check if we can skip (not at terminal) const canDebugSkip = useMemo(() => { if (!currentNode) return false return !isTerminal(flowchart, state.currentNode) }, [currentNode, flowchart, state.currentNode]) // Get decision options for current node if it's a decision const decisionOptions = useMemo(() => { const node = flowchart.nodes[state.currentNode] if (!node || node.definition.type !== 'decision') return null const def = node.definition as DecisionNode return def.options.map((opt) => { const nextNode = flowchart.nodes[opt.next] return { label: opt.label, value: opt.value, pathLabel: opt.pathLabel, leadsTo: nextNode?.content?.title || opt.next, } }) }, [flowchart.nodes, state.currentNode]) // Navigate to a specific step in the working problem history // Clicking on ledger entry i takes you to the state right after that entry was created const navigateToStep = useCallback( (targetIndex: number) => { // If clicking the latest entry, do nothing if (targetIndex >= state.workingProblemHistory.length - 1) { return } // Find the state in history where workingProblemHistory.length === targetIndex + 1 // This is the state right after that entry was created, before any further advances const targetHistoryIndex = stateHistory.findIndex( (s) => s.workingProblemHistory.length === targetIndex + 1 ) if (targetHistoryIndex !== -1) { // Found exact match - restore that state const targetState = stateHistory[targetHistoryIndex] setStateHistory((prev) => prev.slice(0, targetHistoryIndex)) setState(targetState) } else { // Fallback: find the first state with at least targetIndex + 1 entries // and manually truncate the workingProblemHistory const fallbackIndex = stateHistory.findIndex( (s) => s.workingProblemHistory.length > targetIndex ) if (fallbackIndex !== -1) { const baseState = stateHistory[fallbackIndex] const restoredState: FlowchartState = { ...baseState, workingProblemHistory: baseState.workingProblemHistory.slice(0, targetIndex + 1), } setStateHistory((prev) => prev.slice(0, fallbackIndex)) setState(restoredState) } } setPhase({ type: 'showingNode' }) setWrongAttempts(0) setWrongDecision(null) }, [state.workingProblemHistory.length, stateHistory] ) // ============================================================================= // Handlers // ============================================================================= const handleInstructionAdvance = useCallback(() => { advanceToNext() }, [advanceToNext]) const handleDecisionSelect = useCallback( (value: string) => { const correct = isDecisionCorrect(flowchart, state, state.currentNode, value) logger.info('Decision selected', { nodeId: state.currentNode, selectedValue: value, correct, }) if (correct === null || correct === true) { // No validation defined or correct answer setWrongDecision(null) advanceToNext(value, value, true) } else { // Wrong answer - find correct value for feedback const node = flowchart.nodes[state.currentNode] const def = node?.definition let correctValue = '' if (def?.type === 'decision') { for (const opt of def.options) { if (isDecisionCorrect(flowchart, state, state.currentNode, opt.value) === true) { correctValue = opt.value break } } } setWrongAttempts((prev) => prev + 1) setState((prev) => ({ ...prev, mistakes: prev.mistakes + 1 })) // Set wrongDecision with incremented attempt to re-trigger animation setWrongDecision((prev) => ({ value, correctValue, attempt: (prev?.attempt ?? 0) + 1, })) } }, [flowchart, state, advanceToNext, logger] ) const handleCheckpointSubmit = useCallback( (value: number | string | [number, number]) => { const result = validateCheckpoint(flowchart, state, state.currentNode, value) logger.info('Checkpoint submitted', { nodeId: state.currentNode, userValue: value, expected: result?.expected, correct: result?.correct ?? true, }) if (result === null || result.correct) { // No validation or correct const newState = applyStateUpdate( state, state.currentNode, flowchart, value as ProblemValue ) setState(newState) setPhase({ type: 'checkpointFeedback', correct: true, expected: result?.expected ?? value, userAnswer: value, }) // Auto-advance after short delay (unless auto-advance is paused) if (!autoAdvancePaused) { setTimeout(() => { advanceToNext(undefined, value as ProblemValue, true) }, 1000) } } else { // Wrong answer setWrongAttempts((prev) => prev + 1) setState((prev) => ({ ...prev, mistakes: prev.mistakes + 1 })) setPhase({ type: 'checkpointFeedback', correct: false, expected: result.expected, userAnswer: value, }) } }, [flowchart, state, advanceToNext, autoAdvancePaused, logger] ) const handleChecklistToggle = useCallback( (index: number) => { setCheckedItems((prev) => { const next = new Set(prev) if (next.has(index)) { next.delete(index) } else { next.add(index) } // Check if all items are now checked - if so, auto-advance (unless auto-advance is paused) const totalItems = currentChecklist?.length ?? 0 if (next.size === totalItems && totalItems > 0 && !autoAdvancePaused) { // Small delay so the user sees the final checkbox check setTimeout(() => { advanceToNext() }, 300) } return next }) }, [currentChecklist, advanceToNext, autoAdvancePaused] ) // ============================================================================= // Determine what to show based on node type and phase // ============================================================================= const renderNodeInteraction = () => { if (!currentNode) return null const def = currentNode.definition switch (def.type) { case 'instruction': // If there's an interactive checklist, don't show the button - checking all items advances if (hasInteractiveChecklist) { return null } return ( <button data-testid="instruction-advance-button" onClick={handleInstructionAdvance} className={css({ paddingY: '4', paddingX: '8', fontSize: 'lg', fontWeight: 'semibold', borderRadius: 'lg', backgroundColor: { base: 'green.500', _dark: 'green.600' }, color: 'white', cursor: 'pointer', transition: 'all 0.2s', _hover: { backgroundColor: { base: 'green.600', _dark: 'green.500' }, transform: 'scale(1.02)', }, _active: { transform: 'scale(0.98)', }, })} > I did it! </button> ) case 'decision': // Decision is rendered in the FlowchartPhaseRail as a flowchart-style graph // No interaction needed here return null case 'checkpoint': { const checkpointDef = def as CheckpointNode const showHint = wrongAttempts >= 2 const isTwoNumbers = checkpointDef.inputType === 'two-numbers' // Pre-compute expected values for immediate per-field validation let expectedValues: number | [number, number] | undefined try { const context = createContextFromState(state) if (isTwoNumbers && Array.isArray(checkpointDef.expected)) { expectedValues = [ evaluate(checkpointDef.expected[0], context) as number, evaluate(checkpointDef.expected[1], context) as number, ] } else if ( checkpointDef.inputType === 'number' && typeof checkpointDef.expected === 'string' ) { // Only pre-compute if the expression doesn't reference user input if (!checkpointDef.expected.includes('input')) { expectedValues = evaluate(checkpointDef.expected, context) as number } } } catch { // Can't pre-compute, fall back to validate-on-submit expectedValues = undefined } // Format feedback values based on input type const formatFeedback = () => { if (isTwoNumbers) { return { expected: phase.type === 'checkpointFeedback' ? (phase.expected as [number, number]) : undefined, userAnswer: phase.type === 'checkpointFeedback' ? (phase.userAnswer as [number, number]) : undefined, } } return { expected: phase.type === 'checkpointFeedback' ? String(phase.expected) : undefined, userAnswer: phase.type === 'checkpointFeedback' ? String(phase.userAnswer) : undefined, } } // Format hint text const getHintText = () => { if (!showHint || phase.type !== 'checkpointFeedback') return undefined if (isTwoNumbers && Array.isArray(phase.expected)) { return `Hint: The answers are ${phase.expected[0]} and ${phase.expected[1]}` } return `Hint: The answer is ${phase.expected}` } if (phase.type === 'checkpointFeedback') { if (phase.correct) { return ( <div data-testid="checkpoint-correct-feedback" className={css({ padding: '4', backgroundColor: { base: 'green.100', _dark: 'green.800' }, borderRadius: 'lg', color: { base: 'green.800', _dark: 'green.200' }, fontSize: 'lg', fontWeight: 'semibold', textAlign: 'center', })} > Correct! Moving on... </div> ) } // Show checkpoint ready for retry with passive feedback message const feedbackMessage = isTwoNumbers ? 'Not quite - check the denominators and try again' : `Not quite (you entered ${phase.userAnswer}) - try again` return ( <div data-testid="checkpoint-wrong-feedback" className={vstack({ gap: '3' })}> {/* Passive feedback message */} <div className={css({ paddingY: '2', paddingX: '3', borderRadius: 'md', backgroundColor: { base: 'orange.100', _dark: 'orange.900' }, color: { base: 'orange.800', _dark: 'orange.200' }, fontSize: 'sm', textAlign: 'center', })} > {feedbackMessage} {showHint && ( <span className={css({ display: 'block', marginTop: '1', fontWeight: 'medium' })}> {getHintText()} </span> )} </div> {/* Checkpoint ready for immediate retry - no feedback prop so inputs are fresh */} <FlowchartCheckpoint prompt={checkpointDef.prompt} inputType={checkpointDef.inputType} inputLabels={checkpointDef.inputLabels} onSubmit={handleCheckpointSubmit} expectedValues={expectedValues} orderMatters={checkpointDef.orderMatters} /> </div> ) } return ( <FlowchartCheckpoint prompt={checkpointDef.prompt} inputType={checkpointDef.inputType} inputLabels={checkpointDef.inputLabels} onSubmit={handleCheckpointSubmit} expectedValues={expectedValues} orderMatters={checkpointDef.orderMatters} /> ) } case 'milestone': // Auto-advance handled by useEffect above return ( <div data-testid="milestone-display" className={css({ fontSize: '4xl', textAlign: 'center', })} > {currentNode.content.title} </div> ) case 'embellishment': // Auto-advance handled by useEffect above // Display is handled in the content card, nothing needed here return null case 'terminal': return null // Handled by complete phase default: return null } } // ============================================================================= // Render // ============================================================================= if (phase.type === 'complete') { return ( <div data-testid="completion-screen" data-mistakes={state.mistakes} className={vstack({ gap: '6', padding: '8', alignItems: 'center', justifyContent: 'center', minHeight: '400px', })} > <div data-testid="celebration-emoji" className={css({ fontSize: '6xl' })}> 🎉 </div> <h2 className={css({ fontSize: '2xl', fontWeight: 'bold', color: { base: 'green.700', _dark: 'green.300' }, })} > Great job! </h2> <p className={css({ color: { base: 'gray.600', _dark: 'gray.400' } })}> You completed the problem: {problemDisplay} </p> <p className={css({ color: { base: 'gray.500', _dark: 'gray.500' }, fontSize: 'sm' })}> {state.mistakes === 0 ? 'Perfect - no mistakes!' : `Finished with ${state.mistakes} mistake${state.mistakes === 1 ? '' : 's'}`} </p> {onRestart && ( <button data-testid="restart-button" onClick={onRestart} className={css({ paddingY: '3', paddingX: '6', fontSize: 'lg', fontWeight: 'semibold', borderRadius: 'lg', backgroundColor: { base: 'blue.500', _dark: 'blue.600' }, color: 'white', cursor: 'pointer', marginTop: '4', })} > Try another problem </button> )} </div> ) } // Can go back if there's history OR if we can go to problem selection const canGoBack = stateHistory.length > 0 || onChangeProblem const handleDecisionOptionClick = (value: string) => { if (showDecisionFeedback) return handleDecisionSelect(value) } return ( <div data-testid="flowchart-walker" data-current-node={state.currentNode} data-phase={phase.type} className={css({ display: 'flex', flexDirection: 'column', minHeight: '100vh', backgroundColor: { base: 'gray.50', _dark: 'gray.900' }, })} > {/* Top bar: Phase Rail (centered) + Back/New buttons (right side) */} {/* Note: Hamburger menu is handled by parent page in top-left corner */} <header data-testid="walker-header" className={css({ display: 'flex', alignItems: 'center', justifyContent: 'center', paddingY: '3', paddingX: '4', // Leave space for floating hamburger menu on the left paddingLeft: '70px', backgroundColor: { base: 'white', _dark: 'gray.800' }, borderBottom: '1px solid', borderColor: { base: 'gray.200', _dark: 'gray.700' }, position: 'relative', })} > {/* Compact Phase Rail - centered */} <FlowchartPhaseRail flowchart={flowchart} state={state} compact={true} /> {/* Right side controls: Back + New Problem */} <div className={css({ position: 'absolute', right: '16px', top: '50%', transform: 'translateY(-50%)', display: 'flex', alignItems: 'center', gap: '2', })} > {/* Back button - for step navigation within flowchart */} {stateHistory.length > 0 && ( <button data-testid="back-button" onClick={goBack} className={css({ display: 'flex', alignItems: 'center', gap: '1', padding: '1.5 2.5', fontSize: 'sm', fontWeight: 'medium', color: { base: 'gray.600', _dark: 'gray.400' }, backgroundColor: 'transparent', border: 'none', borderRadius: 'md', cursor: 'pointer', transition: 'all 0.15s', _hover: { color: { base: 'gray.900', _dark: 'gray.200' }, backgroundColor: { base: 'gray.100', _dark: 'gray.700' }, }, })} > <span className={css({ fontSize: 'md' })}>←</span> <span className={css({ display: { base: 'none', sm: 'inline' } })}>Back</span> </button> )} {/* New Problem button */} {onChangeProblem && ( <button data-testid="change-problem-button" onClick={onChangeProblem} className={css({ padding: '1.5 2.5', fontSize: 'sm', fontWeight: 'medium', color: { base: 'blue.600', _dark: 'blue.400' }, backgroundColor: 'transparent', border: 'none', borderRadius: 'md', cursor: 'pointer', transition: 'all 0.15s', _hover: { backgroundColor: { base: 'blue.50', _dark: 'blue.900/30' }, }, })} > <span className={css({ display: { base: 'none', sm: 'inline' } })}>New Problem</span> <span className={css({ display: { base: 'inline', sm: 'none' } })}>New</span> </button> )} </div> </header> {/* Debug step timeline - only visible when visual debug mode is enabled */} {isVisualDebugEnabled && timelineSteps.length > 0 && ( <DebugStepTimeline steps={timelineSteps} currentIndex={stateHistory.length} onNavigate={navigateToHistoryStep} canGoBack={stateHistory.length > 0} canGoForward={redoStack.length > 0} canSkip={canDebugSkip} onBack={goBack} onForward={goForward} onSkip={debugSkipStep} autoAdvancePaused={autoAdvancePaused} onToggleAutoAdvance={() => setAutoAdvancePaused((prev) => !prev)} /> )} {/* Debug mermaid diagram - shows flowchart with current node highlighted */} {isVisualDebugEnabled && flowchart.rawMermaid && ( <DebugMermaidDiagram mermaidContent={flowchart.rawMermaid} currentNodeId={state.currentNode} /> )} {/* Main content - centered column */} <main data-testid="main-content-area" className={css({ flex: 1, display: 'flex', flexDirection: 'column', alignItems: 'center', padding: '4', paddingTop: '6', gap: '5', maxWidth: '700px', width: '100%', margin: '0 auto', })} > {/* Instructions section - node content above the Time Machine */} {currentNode?.definition.type !== 'milestone' && currentNode?.definition.type !== 'embellishment' && currentNode?.definition.type !== 'decision' && ( <div data-testid="instructions-section" data-node-type={currentNode?.definition.type} className={css({ width: '100%', paddingY: '4', paddingX: '5', backgroundColor: { base: 'white', _dark: 'gray.800' }, borderRadius: 'xl', boxShadow: 'md', border: '1px solid', borderColor: { base: 'gray.200', _dark: 'gray.700' }, })} > {currentNode && ( <FlowchartNodeContent content={currentNode.content} checkedItems={hasInteractiveChecklist ? checkedItems : undefined} onChecklistToggle={hasInteractiveChecklist ? handleChecklistToggle : undefined} /> )} </div> )} {/* Embellishment display - animated emoji */} {currentNode?.definition.type === 'embellishment' && ( <div data-testid="embellishment-display" className={css({ display: 'flex', alignItems: 'center', justifyContent: 'center', minHeight: '120px', })} > <span className={css({ fontSize: '6xl', animation: 'embellishmentPop 0.6s ease-out', })} > {currentNode.content.title} </span> </div> )} {/* Milestone display */} {currentNode?.definition.type === 'milestone' && ( <div data-testid="milestone-display" className={css({ fontSize: '5xl', textAlign: 'center', padding: '6', })} > {currentNode.content.title} </div> )} {/* TIME MACHINE: Problem evolution stack - the hero of the page */} {state.workingProblemHistory.length > 0 && ( <TimeMachineHistory history={state.workingProblemHistory} onNavigate={navigateToStep} fontSize="xl" /> )} {/* Decision graph - when at a decision node */} {decisionOptions && currentNode?.definition.type === 'decision' && ( <div data-testid="decision-area" data-element="decision-graph-container" data-option-count={decisionOptions.length} className={css({ width: '100%', maxWidth: '500px', })} > <FlowchartDecisionGraph nodeTitle={currentNode.content?.title || 'Choose'} nodeBody={currentNode.content?.body || []} options={decisionOptions.map((opt) => ({ label: opt.label, value: opt.value, pathLabel: opt.pathLabel, leadsTo: opt.leadsTo, }))} onSelect={handleDecisionOptionClick} wrongAnswer={showDecisionFeedback ? wrongDecision?.value : undefined} correctAnswer={showDecisionFeedback ? wrongDecision?.correctValue : undefined} disabled={showDecisionFeedback} hasPreviousNode={state.history.length > 0} /> </div> )} {/* Interaction area: Checkpoint / "I did it" button */} {currentNode?.definition.type !== 'decision' && ( <div data-testid="interaction-area" className={css({ display: 'flex', justifyContent: 'center', width: '100%', maxWidth: '400px', })} > {renderNodeInteraction()} </div> )} </main> </div> ) } |