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import {
createContext,
useCallback,
useContext,
useEffect,
useMemo,
useRef,
useState,
type ReactNode,
} from 'react'
import { useQueryClient } from '@tanstack/react-query'
import { useRouter } from 'next/navigation'
import type {
SessionPlan,
GameBreakSelectionMode,
PracticeBreakGameConfig,
} from '@/db/schema/session-plans'
import { DEFAULT_PLAN_CONFIG, DEFAULT_GAME_BREAK_SETTINGS } from '@/db/schema/session-plan-helpers'
import type { PlayerSessionPreferencesConfig } from '@/db/schema/player-session-preferences'
import { getPracticeApprovedGames } from '@/lib/arcade/practice-approved-games'
import type { PracticeBreakConfig } from '@/lib/arcade/manifest-schema'
import {
ActiveSessionExistsClientError,
NoSkillsEnabledClientError,
SessionLimitReachedError,
sessionPlanKeys,
useAbandonSession,
useApproveSessionPlan,
useGenerateSessionPlan,
useStartSessionPlan,
} from '@/hooks/useSessionPlan'
import type { SessionMode } from '@/lib/curriculum/session-mode'
import { computeTermCountRange } from '@/lib/curriculum/config/term-count-scaling'
import {
convertSecondsPerProblemToSpt,
estimateSessionProblemCount,
TIME_ESTIMATION_DEFAULTS,
} from '@/lib/curriculum/time-estimation'
import {
getSkillTutorialConfig,
type SkillTutorialConfig,
} from '@/lib/curriculum/skill-tutorial-config'
// Problem length preference type and comfort adjustments
export type ProblemLengthPreference = 'shorter' | 'recommended' | 'longer'
export const COMFORT_ADJUSTMENTS: Record<ProblemLengthPreference, number> = {
shorter: -0.3,
recommended: 0,
longer: 0.2,
}
// Part types configuration
export const PART_TYPES = [
{ type: 'abacus' as const, emoji: '🧮', label: 'Abacus', defaultWeight: 2 },
{
type: 'visualization' as const,
emoji: '🧠',
label: 'Visualize',
defaultWeight: 1,
},
{ type: 'linear' as const, emoji: '💭', label: 'Linear', defaultWeight: 0 },
] as const
// Purpose types configuration
export const PURPOSE_TYPES = [
{ type: 'focus' as const, emoji: '🎯', label: 'Focus', defaultWeight: 3 },
{ type: 'reinforce' as const, emoji: '💪', label: 'Reinforce', defaultWeight: 1 },
{ type: 'review' as const, emoji: '🔄', label: 'Review', defaultWeight: 1 },
{ type: 'challenge' as const, emoji: '⭐', label: 'Challenge', defaultWeight: 1 },
] as const
export type PurposeWeightType = 'focus' | 'reinforce' | 'review' | 'challenge'
export type PurposeWeights = Record<PurposeWeightType, number>
export type EnabledParts = {
abacus: boolean
visualization: boolean
linear: boolean
}
export type PartType = 'abacus' | 'visualization' | 'linear'
export type PartWeights = {
abacus: number
visualization: number
linear: number
}
// Game info interface for the context (used for both real games and mock overrides)
export interface GameInfo {
manifest: {
name: string
displayName: string
shortName?: string
icon: string
/** Practice break configuration (presets, locked fields, etc.) */
practiceBreakConfig?: PracticeBreakConfig
}
}
/** Difficulty preset type for game break configuration */
export type GameBreakDifficultyPreset = 'easy' | 'medium' | 'hard' | null
interface StartPracticeModalContextValue {
// Read-only props from parent
studentId: string
studentName: string
focusDescription: string
sessionMode: SessionMode
existingPlan: SessionPlan | null
// Session config (state + setters)
durationMinutes: number
setDurationMinutes: (min: number) => void
enabledParts: EnabledParts
partWeights: PartWeights
/** Tap on segment: 0→1, 1→2, 2→1 (never disables) */
cyclePartWeight: (partType: keyof PartWeights) => void
/** Explicit disable via × button (blocked if last active) */
disablePart: (partType: keyof PartWeights) => void
problemLengthPreference: ProblemLengthPreference
setProblemLengthPreference: (pref: ProblemLengthPreference) => void
/** Comfort level from the session mode API (0-1) */
comfortLevel: number
/** Per-mode comfort levels (e.g. { abacus: 0.72, visualization: 0.45, linear: 0.68 }) */
comfortByMode: Record<string, number>
// Purpose weight config
purposeWeights: PurposeWeights
/** Tap on segment: 0→1, 1↔2 (no-op if sole active) */
cyclePurposeWeight: (purposeType: PurposeWeightType) => void
/** Explicit disable via × button (blocked if last active) */
disablePurpose: (purposeType: PurposeWeightType) => void
/** Normalized 0-1 weights for API call */
purposeTimeWeights: Record<PurposeWeightType, number>
/** Whether to shuffle purposes within each part (true = interleaved, false = grouped in order) */
shufflePurposes: boolean
setShufflePurposes: (shuffle: boolean) => void
// Game break config (state + setters)
gameBreakEnabled: boolean
setGameBreakEnabled: (enabled: boolean) => void
gameBreakMinutes: number
setGameBreakMinutes: (mins: number) => void
gameBreakSelectionMode: GameBreakSelectionMode
setGameBreakSelectionMode: (mode: GameBreakSelectionMode) => void
gameBreakSelectedGame: string | 'random' | null
setGameBreakSelectedGame: (game: string | 'random' | null) => void
// Per-game config (state + setters)
gameBreakDifficultyPreset: GameBreakDifficultyPreset
setGameBreakDifficultyPreset: (preset: GameBreakDifficultyPreset) => void
gameBreakCustomConfig: Record<string, unknown>
setGameBreakCustomConfig: (config: Record<string, unknown>) => void
gameBreakShowCustomize: boolean
setGameBreakShowCustomize: (show: boolean) => void
/** The selected game's practice break config (null if random or no game selected) */
selectedGamePracticeConfig: PracticeBreakConfig | null
/** Resolved game config based on preset or custom settings */
resolvedGameConfig: Record<string, unknown>
// Derived values
secondsPerTerm: number
avgTermsPerProblem: number
problemsPerType: { abacus: number; visualization: number; linear: number }
estimatedProblems: number
enabledPartCount: number
showGameBreakSettings: boolean
practiceApprovedGames: GameInfo[]
/** Games enabled for this player (filtered from practiceApprovedGames by per-player allowlist) */
playerEnabledGames: GameInfo[]
/** True when only one game is available for practice breaks */
hasSingleGame: boolean
/** The single game info when hasSingleGame is true, null otherwise */
singleGame: GameInfo | null
modesSummary: { text: string; emojis: string }
// Tutorial/remediation derived values
tutorialConfig: SkillTutorialConfig | null
showTutorialGate: boolean
showRemediationCta: boolean
nextSkill: { skillId: string; displayName: string } | null
/**
* Whether the student can skip the tutorial.
* False when user has no other skills to practice (first skill).
* When false, tutorial is mandatory.
*/
canSkipTutorial: boolean
/**
* Whether to include tutorial in the session.
* Default: true when tutorialRequired.
* User can uncheck if canSkipTutorial is true.
*/
includeTutorial: boolean
setIncludeTutorial: (include: boolean) => void
// UI state
isExpanded: boolean
setIsExpanded: (expanded: boolean) => void
// Mutation state
isStarting: boolean
displayError: Error | null
isNoSkillsError: boolean
isSessionLimitError: boolean
/** Progress percentage (0-100) during plan generation */
generationProgress: number
/** Human-readable progress message during plan generation */
generationProgressMessage: string | null
// Skill selector (for "no skills" error remediation)
showSkillSelector: boolean
setShowSkillSelector: (show: boolean) => void
// Actions
handleStart: () => Promise<void>
resetMutations: () => void
}
const StartPracticeModalContext = createContext<StartPracticeModalContextValue | null>(null)
export function useStartPracticeModal() {
const context = useContext(StartPracticeModalContext)
if (!context) {
throw new Error('useStartPracticeModal must be used within StartPracticeModalProvider')
}
return context
}
interface StartPracticeModalProviderProps {
children: ReactNode
studentId: string
studentName: string
focusDescription: string
sessionMode: SessionMode
/** Comfort level from the session mode API (0-1), defaults to 0.3 */
comfortLevel?: number
/** Per-mode comfort levels from the session mode API */
comfortByMode?: Record<string, number>
secondsPerTerm?: number
avgSecondsPerProblem?: number
existingPlan?: SessionPlan | null
/** When true, abandon existing session before generating a new one */
startFresh?: boolean
onStarted?: () => void
/** Initial expanded state for settings panel (for Storybook) */
initialExpanded?: boolean
/** Override practice-approved games list (for Storybook/testing) */
practiceApprovedGamesOverride?: GameInfo[]
/** Previously saved session preferences for this student */
savedPreferences?: PlayerSessionPreferencesConfig | null
/** Callback fired when settings change (caller should debounce) */
onSavePreferences?: (prefs: PlayerSessionPreferencesConfig) => void
}
export function StartPracticeModalProvider({
children,
studentId,
studentName,
focusDescription,
sessionMode,
comfortLevel: comfortLevelProp = 0.3,
comfortByMode: comfortByModeProp = {},
secondsPerTerm: secondsPerTermProp,
avgSecondsPerProblem,
existingPlan = null,
startFresh = false,
onStarted,
initialExpanded = false,
practiceApprovedGamesOverride,
savedPreferences,
onSavePreferences,
}: StartPracticeModalProviderProps) {
const router = useRouter()
const queryClient = useQueryClient()
// Session config state (savedPreferences takes priority, then existingPlan, then hardcoded defaults)
const [durationMinutes, setDurationMinutes] = useState(
savedPreferences?.durationMinutes ?? existingPlan?.targetDurationMinutes ?? 10
)
const [isExpanded, setIsExpanded] = useState(initialExpanded)
const [showSkillSelector, setShowSkillSelector] = useState(false)
// Whether to include tutorial in session (default: true if tutorial is required)
const [includeTutorial, setIncludeTutorial] = useState(
sessionMode.type === 'progression' && sessionMode.tutorialRequired
)
const [partWeights, setPartWeights] = useState<PartWeights>(
savedPreferences?.partWeights ?? { abacus: 2, visualization: 1, linear: 0 }
)
const enabledParts = useMemo<EnabledParts>(
() => ({
abacus: partWeights.abacus > 0,
visualization: partWeights.visualization > 0,
linear: partWeights.linear > 0,
}),
[partWeights]
)
const [problemLengthPreference, setProblemLengthPreference] = useState<ProblemLengthPreference>(
savedPreferences?.problemLengthPreference ?? 'recommended'
)
// Game break config state
const [gameBreakEnabled, setGameBreakEnabled] = useState(
savedPreferences?.gameBreakEnabled ?? DEFAULT_GAME_BREAK_SETTINGS.enabled
)
const [gameBreakMinutes, setGameBreakMinutes] = useState(
savedPreferences?.gameBreakMinutes ?? DEFAULT_GAME_BREAK_SETTINGS.maxDurationMinutes
)
const [gameBreakSelectionMode, setGameBreakSelectionMode] = useState<GameBreakSelectionMode>(
(savedPreferences?.gameBreakSelectionMode as GameBreakSelectionMode) ??
DEFAULT_GAME_BREAK_SETTINGS.selectionMode
)
const [gameBreakSelectedGame, setGameBreakSelectedGameRaw] = useState<string | 'random' | null>(
savedPreferences?.gameBreakSelectedGame ?? DEFAULT_GAME_BREAK_SETTINGS.selectedGame
)
// Per-game config state
const [gameBreakDifficultyPreset, setGameBreakDifficultyPreset] =
useState<GameBreakDifficultyPreset>(
(savedPreferences?.gameBreakDifficultyPreset as GameBreakDifficultyPreset) ?? 'medium'
)
const [gameBreakCustomConfig, setGameBreakCustomConfig] = useState<Record<string, unknown>>(
savedPreferences?.gameBreakCustomConfig ?? {}
)
const [gameBreakShowCustomize, setGameBreakShowCustomize] = useState(
savedPreferences?.gameBreakShowCustomize ?? false
)
// Tap on segment: 0→1, 1→2, 2→1 (never disables; no-op if sole active mode)
const cyclePartWeight = useCallback((partType: keyof PartWeights) => {
setPartWeights((prev) => {
const current = prev[partType]
if (current === 0) return { ...prev, [partType]: 1 }
// If this is the only active mode, weight is meaningless — don't toggle
const activeCount = Object.values(prev).filter((w) => w > 0).length
if (activeCount === 1) return prev
if (current === 1) return { ...prev, [partType]: 2 }
// current === 2 → back to 1
return { ...prev, [partType]: 1 }
})
}, [])
// Explicit disable via × button (blocked if last active)
const disablePart = useCallback((partType: keyof PartWeights) => {
setPartWeights((prev) => {
const othersTotal = Object.entries(prev)
.filter(([k]) => k !== partType)
.reduce((sum, [, v]) => sum + v, 0)
if (othersTotal === 0) return prev // can't disable the last active part
return { ...prev, [partType]: 0 }
})
}, [])
// Purpose weight state
const [purposeWeights, setPurposeWeights] = useState<PurposeWeights>(
savedPreferences?.purposeWeights ?? { focus: 3, reinforce: 1, review: 1, challenge: 1 }
)
const [shufflePurposes, setShufflePurposes] = useState(savedPreferences?.shufflePurposes ?? true)
// Tap on segment: 0→1, 1↔2 (no-op if sole active)
const cyclePurposeWeight = useCallback((purposeType: PurposeWeightType) => {
setPurposeWeights((prev) => {
const current = prev[purposeType]
if (current === 0) return { ...prev, [purposeType]: 1 }
const activeCount = Object.values(prev).filter((w) => w > 0).length
if (activeCount === 1) return prev
if (current === 1) return { ...prev, [purposeType]: 2 }
return { ...prev, [purposeType]: 1 }
})
}, [])
// Explicit disable via × button (blocked if last active)
const disablePurpose = useCallback((purposeType: PurposeWeightType) => {
setPurposeWeights((prev) => {
const othersTotal = Object.entries(prev)
.filter(([k]) => k !== purposeType)
.reduce((sum, [, v]) => sum + v, 0)
if (othersTotal === 0) return prev
return { ...prev, [purposeType]: 0 }
})
}, [])
// Normalized 0-1 weights for API call
const purposeTimeWeights = useMemo(() => {
const total =
purposeWeights.focus +
purposeWeights.reinforce +
purposeWeights.review +
purposeWeights.challenge
if (total === 0) return { focus: 1, reinforce: 0, review: 0, challenge: 0 }
return {
focus: purposeWeights.focus / total,
reinforce: purposeWeights.reinforce / total,
review: purposeWeights.review / total,
challenge: purposeWeights.challenge / total,
}
}, [purposeWeights])
// Derived values
const secondsPerTerm = useMemo(() => {
if (secondsPerTermProp !== undefined) return secondsPerTermProp
if (avgSecondsPerProblem !== undefined)
return convertSecondsPerProblemToSpt(avgSecondsPerProblem)
return TIME_ESTIMATION_DEFAULTS.secondsPerTerm
}, [secondsPerTermProp, avgSecondsPerProblem])
const avgTermsPerProblem = useMemo(() => {
const adjustment = COMFORT_ADJUSTMENTS[problemLengthPreference]
const totalWeight = partWeights.abacus + partWeights.visualization + partWeights.linear
if (totalWeight === 0) return 3 // fallback
let weightedSum = 0
for (const { type } of PART_TYPES) {
if (partWeights[type] <= 0) continue
const modeComfort = comfortByModeProp[type] ?? comfortLevelProp
const adjustedComfort = Math.max(0, Math.min(1, modeComfort + adjustment))
const range = computeTermCountRange(type, adjustedComfort)
weightedSum += ((range.min + range.max) / 2) * partWeights[type]
}
return weightedSum / totalWeight
}, [problemLengthPreference, comfortLevelProp, comfortByModeProp, partWeights])
const practiceApprovedGames = useMemo(
() => practiceApprovedGamesOverride ?? getPracticeApprovedGames(),
[practiceApprovedGamesOverride]
)
// Per-player enabled games: filter approved games by the player's allowlist
const gameBreakEnabledGames = savedPreferences?.gameBreakEnabledGames ?? []
const playerEnabledGames = useMemo(() => {
if (gameBreakEnabledGames.length === 0) return []
return practiceApprovedGames.filter((g) => gameBreakEnabledGames.includes(g.manifest.name))
}, [practiceApprovedGames, gameBreakEnabledGames])
const hasSingleGame = playerEnabledGames.length === 1
const singleGame = hasSingleGame ? playerEnabledGames[0] : null
// Get the selected game's practice break config
const selectedGamePracticeConfig = useMemo<PracticeBreakConfig | null>(() => {
if (!gameBreakSelectedGame || gameBreakSelectedGame === 'random') return null
const game = practiceApprovedGames.find((g) => g.manifest.name === gameBreakSelectedGame)
return game?.manifest.practiceBreakConfig ?? null
}, [gameBreakSelectedGame, practiceApprovedGames])
// Resolve game config based on preset or custom settings
const resolvedGameConfig = useMemo<Record<string, unknown>>(() => {
if (!selectedGamePracticeConfig) return {}
// If showing customize view, use custom config
if (gameBreakShowCustomize) {
return {
...selectedGamePracticeConfig.suggestedConfig,
...gameBreakCustomConfig,
}
}
// Otherwise, use preset (defaults to medium if no preset selected)
const preset = gameBreakDifficultyPreset ?? 'medium'
const presetConfig = selectedGamePracticeConfig.difficultyPresets?.[preset]
return {
...selectedGamePracticeConfig.suggestedConfig,
...presetConfig,
}
}, [
selectedGamePracticeConfig,
gameBreakShowCustomize,
gameBreakCustomConfig,
gameBreakDifficultyPreset,
])
// Wrapper for setGameBreakSelectedGame that resets config when game changes
const setGameBreakSelectedGame = useCallback((game: string | 'random' | null) => {
setGameBreakSelectedGameRaw(game)
// Reset config state when switching games
setGameBreakDifficultyPreset('medium')
setGameBreakCustomConfig({})
setGameBreakShowCustomize(false)
}, [])
// Auto-select single game when only one is available
useEffect(() => {
if (hasSingleGame && singleGame) {
setGameBreakSelectedGameRaw(singleGame.manifest.name)
// Force auto-start mode when there's only one game
setGameBreakSelectionMode('auto-start')
}
}, [hasSingleGame, singleGame])
// If selected game is not in enabled list, reset to null
useEffect(() => {
if (
gameBreakSelectedGame &&
gameBreakSelectedGame !== 'random' &&
playerEnabledGames.length > 0 &&
!playerEnabledGames.some((g) => g.manifest.name === gameBreakSelectedGame)
) {
setGameBreakSelectedGameRaw(null)
}
}, [gameBreakSelectedGame, playerEnabledGames])
// If no games enabled, force game breaks off
useEffect(() => {
if (playerEnabledGames.length === 0 && gameBreakEnabled) {
setGameBreakEnabled(false)
}
}, [playerEnabledGames.length, gameBreakEnabled])
// Fire onSavePreferences callback whenever any persisted setting changes.
// Use a ref for the callback so the effect only re-runs when settings change,
// not when the callback identity changes (which would cause an infinite loop).
const onSavePreferencesRef = useRef(onSavePreferences)
onSavePreferencesRef.current = onSavePreferences
// Track the last-saved config as JSON so we only fire saves when values actually change.
// This handles StrictMode double-mount (ref persists, so second mount sees same JSON → skips)
// and object reference changes (partWeights/purposeWeights are new objects each render).
const lastSavedConfigRef = useRef<string | null>(null)
useEffect(() => {
const config = {
durationMinutes,
problemLengthPreference,
partWeights,
purposeWeights,
shufflePurposes,
gameBreakEnabled,
gameBreakMinutes,
gameBreakSelectionMode,
gameBreakSelectedGame: gameBreakSelectedGame === 'random' ? null : gameBreakSelectedGame,
gameBreakDifficultyPreset,
gameBreakShowCustomize,
gameBreakCustomConfig,
gameBreakEnabledGames,
kidLanguageStyle: savedPreferences?.kidLanguageStyle,
}
const configJson = JSON.stringify(config)
if (lastSavedConfigRef.current === null) {
// First run — capture initial state, don't save
lastSavedConfigRef.current = configJson
return
}
if (configJson === lastSavedConfigRef.current) return
lastSavedConfigRef.current = configJson
onSavePreferencesRef.current?.(config)
}, [
durationMinutes,
problemLengthPreference,
partWeights,
purposeWeights,
shufflePurposes,
gameBreakEnabled,
gameBreakMinutes,
gameBreakSelectionMode,
gameBreakSelectedGame,
gameBreakDifficultyPreset,
gameBreakShowCustomize,
gameBreakCustomConfig,
gameBreakEnabledGames,
savedPreferences?.kidLanguageStyle,
])
// Derive partTimeWeights from partWeights for the API call
const partTimeWeights = useMemo(() => {
const total = partWeights.abacus + partWeights.visualization + partWeights.linear
if (total === 0) return { abacus: 1, visualization: 0, linear: 0 }
return {
abacus: partWeights.abacus / total,
visualization: partWeights.visualization / total,
linear: partWeights.linear / total,
}
}, [partWeights])
const problemsPerType = useMemo(() => {
const totalWeight = partWeights.abacus + partWeights.visualization + partWeights.linear
if (totalWeight === 0) {
return { abacus: 0, visualization: 0, linear: 0 }
}
return {
abacus:
partWeights.abacus > 0
? estimateSessionProblemCount(
durationMinutes * (partWeights.abacus / totalWeight),
avgTermsPerProblem,
secondsPerTerm,
'abacus'
)
: 0,
visualization:
partWeights.visualization > 0
? estimateSessionProblemCount(
durationMinutes * (partWeights.visualization / totalWeight),
avgTermsPerProblem,
secondsPerTerm,
'visualization'
)
: 0,
linear:
partWeights.linear > 0
? estimateSessionProblemCount(
durationMinutes * (partWeights.linear / totalWeight),
avgTermsPerProblem,
secondsPerTerm,
'linear'
)
: 0,
}
}, [durationMinutes, partWeights, avgTermsPerProblem, secondsPerTerm])
const estimatedProblems = useMemo(() => {
return problemsPerType.abacus + problemsPerType.visualization + problemsPerType.linear
}, [problemsPerType])
const modesSummary = useMemo(() => {
const enabled = PART_TYPES.filter((p) => partWeights[p.type] > 0)
if (enabled.length === PART_TYPES.length)
return {
text: 'all modes',
emojis: enabled.map((p) => p.emoji).join(''),
}
if (enabled.length === 0) return { text: 'none', emojis: '—' }
return {
text: `${enabled.length} mode${enabled.length > 1 ? 's' : ''}`,
emojis: enabled.map((p) => p.emoji).join(''),
}
}, [partWeights])
const enabledPartCount = useMemo(() => {
return PART_TYPES.filter((p) => partWeights[p.type] > 0).length
}, [partWeights])
const showGameBreakSettings = enabledPartCount >= 2
// Tutorial/remediation derived values
const tutorialConfig = useMemo(() => {
if (sessionMode.type !== 'progression' || !sessionMode.tutorialRequired) return null
return getSkillTutorialConfig(sessionMode.nextSkill.skillId)
}, [sessionMode])
const nextSkill = sessionMode.type === 'progression' ? sessionMode.nextSkill : null
const showTutorialGate = !!tutorialConfig
const showRemediationCta = sessionMode.type === 'remediation' && sessionMode.weakSkills.length > 0
// Check if student can skip the tutorial (has other skills to practice)
const canSkipTutorial = sessionMode.type === 'progression' ? sessionMode.canSkipTutorial : true
// Mutations
const generatePlan = useGenerateSessionPlan()
const approvePlan = useApproveSessionPlan()
const startPlan = useStartSessionPlan()
const abandonSession = useAbandonSession()
// Track whether we're in the start flow (waiting for generation → approve → start)
const [isStartFlow, setIsStartFlow] = useState(false)
const isStarting =
isStartFlow ||
generatePlan.isPending ||
generatePlan.isGenerating ||
approvePlan.isPending ||
startPlan.isPending
const displayError = useMemo(() => {
if (generatePlan.error && !(generatePlan.error instanceof ActiveSessionExistsClientError)) {
return generatePlan.error
}
// Show task-level errors (e.g., NoSkillsEnabled thrown inside the task)
if (generatePlan.taskError) {
return new Error(generatePlan.taskError)
}
if (approvePlan.error) return approvePlan.error
if (startPlan.error) return startPlan.error
return null
}, [generatePlan.error, generatePlan.taskError, approvePlan.error, startPlan.error])
const isNoSkillsError =
displayError instanceof NoSkillsEnabledClientError ||
(displayError?.message?.includes('no skills are enabled') ?? false)
const isSessionLimitError = displayError instanceof SessionLimitReachedError
// Refs to stable mutation functions (avoids re-triggering effects)
const onStartedRef = useRef(onStarted)
onStartedRef.current = onStarted
const approvePlanRef = useRef(approvePlan)
approvePlanRef.current = approvePlan
const startPlanRef = useRef(startPlan)
startPlanRef.current = startPlan
// Guard against re-entry (effect dependencies like plan object identity can re-trigger)
const isCompletingFlowRef = useRef(false)
const resetMutations = useCallback(() => {
generatePlan.reset()
approvePlan.reset()
startPlan.reset()
setIsStartFlow(false)
isCompletingFlowRef.current = false
}, [generatePlan, approvePlan, startPlan])
// When the background task completes with a plan, continue the start flow
// (approve → start → navigate)
useEffect(() => {
if (!isStartFlow) return
if (!generatePlan.plan) return
if (isCompletingFlowRef.current) return
isCompletingFlowRef.current = true
// Plan is ready — continue with approve and start
const plan = generatePlan.plan
;(async () => {
try {
await approvePlanRef.current.mutateAsync({ playerId: studentId, planId: plan.id })
await startPlanRef.current.mutateAsync({ playerId: studentId, planId: plan.id })
onStartedRef.current?.()
router.push(`/practice/${studentId}`, { scroll: false })
} catch {
// Error will show in UI
} finally {
setIsStartFlow(false)
isCompletingFlowRef.current = false
}
})()
}, [isStartFlow, generatePlan.plan, studentId, router])
// If the task fails, stop the start flow
useEffect(() => {
if (isStartFlow && generatePlan.taskError) {
setIsStartFlow(false)
}
}, [isStartFlow, generatePlan.taskError])
const generatePlanParams = useCallback(() => {
const comfortAdj = COMFORT_ADJUSTMENTS[problemLengthPreference]
return {
playerId: studentId,
durationMinutes,
comfortAdjustment: comfortAdj !== 0 ? comfortAdj : undefined,
enabledParts,
partTimeWeights,
purposeTimeWeights,
shufflePurposes,
problemGenerationMode: 'adaptive-bkt' as const,
sessionMode,
gameBreakSettings: {
enabled: gameBreakEnabled,
maxDurationMinutes: gameBreakMinutes,
selectionMode: gameBreakSelectionMode,
selectedGame: gameBreakEnabled ? gameBreakSelectedGame : null,
gameConfig:
gameBreakEnabled &&
gameBreakSelectedGame &&
gameBreakSelectedGame !== 'random' &&
Object.keys(resolvedGameConfig).length > 0
? ({
[gameBreakSelectedGame]: resolvedGameConfig,
} as PracticeBreakGameConfig)
: undefined,
enabledGames: playerEnabledGames.map((g) => g.manifest.name),
skipSetupPhase: true,
},
}
}, [
studentId,
durationMinutes,
problemLengthPreference,
enabledParts,
partTimeWeights,
purposeTimeWeights,
shufflePurposes,
sessionMode,
gameBreakEnabled,
gameBreakMinutes,
gameBreakSelectionMode,
gameBreakSelectedGame,
resolvedGameConfig,
playerEnabledGames,
])
const handleStart = useCallback(async () => {
resetMutations()
try {
// When not starting fresh, reuse existing plan if duration matches
if (!startFresh && existingPlan && existingPlan.targetDurationMinutes === durationMinutes) {
setIsStartFlow(true)
await approvePlan.mutateAsync({ playerId: studentId, planId: existingPlan.id })
await startPlan.mutateAsync({ playerId: studentId, planId: existingPlan.id })
onStarted?.()
router.push(`/practice/${studentId}`, { scroll: false })
setIsStartFlow(false)
return
}
// If starting fresh, abandon the existing session first
if (startFresh && existingPlan) {
await abandonSession.mutateAsync({ playerId: studentId, planId: existingPlan.id })
}
try {
setIsStartFlow(true)
await generatePlan.mutateAsync(generatePlanParams())
// Don't set isStartFlow to false — the effect will handle the rest
} catch (err) {
if (err instanceof ActiveSessionExistsClientError) {
if (startFresh) {
// Abandon and retry — shouldn't normally happen since we abandoned above,
// but handles race conditions
const plan = err.existingPlan
await abandonSession.mutateAsync({ playerId: studentId, planId: plan.id })
await generatePlan.mutateAsync(generatePlanParams())
} else {
const plan = err.existingPlan
queryClient.setQueryData(sessionPlanKeys.active(studentId), plan)
await approvePlan.mutateAsync({ playerId: studentId, planId: plan.id })
await startPlan.mutateAsync({ playerId: studentId, planId: plan.id })
onStarted?.()
router.push(`/practice/${studentId}`, { scroll: false })
setIsStartFlow(false)
}
} else {
setIsStartFlow(false)
throw err
}
}
} catch {
// Error will show in UI
setIsStartFlow(false)
}
}, [
studentId,
durationMinutes,
startFresh,
existingPlan,
generatePlanParams,
generatePlan,
approvePlan,
startPlan,
abandonSession,
queryClient,
router,
onStarted,
resetMutations,
])
const value: StartPracticeModalContextValue = {
// Read-only props
studentId,
studentName,
focusDescription,
sessionMode,
existingPlan,
// Session config
durationMinutes,
setDurationMinutes,
enabledParts,
partWeights,
cyclePartWeight,
disablePart,
problemLengthPreference,
setProblemLengthPreference,
comfortLevel: comfortLevelProp,
comfortByMode: comfortByModeProp,
// Purpose weight config
purposeWeights,
cyclePurposeWeight,
disablePurpose,
purposeTimeWeights,
shufflePurposes,
setShufflePurposes,
// Game break config
gameBreakEnabled,
setGameBreakEnabled,
gameBreakMinutes,
setGameBreakMinutes,
gameBreakSelectionMode,
setGameBreakSelectionMode,
gameBreakSelectedGame,
setGameBreakSelectedGame,
// Per-game config
gameBreakDifficultyPreset,
setGameBreakDifficultyPreset,
gameBreakCustomConfig,
setGameBreakCustomConfig,
gameBreakShowCustomize,
setGameBreakShowCustomize,
selectedGamePracticeConfig,
resolvedGameConfig,
// Derived values
secondsPerTerm,
avgTermsPerProblem,
problemsPerType,
estimatedProblems,
enabledPartCount,
showGameBreakSettings,
practiceApprovedGames,
playerEnabledGames,
hasSingleGame,
singleGame,
modesSummary,
// Tutorial/remediation
tutorialConfig,
showTutorialGate,
showRemediationCta,
nextSkill,
canSkipTutorial,
includeTutorial,
setIncludeTutorial,
// UI state
isExpanded,
setIsExpanded,
// Mutation state
isStarting,
displayError,
isNoSkillsError,
isSessionLimitError,
generationProgress: generatePlan.progress,
generationProgressMessage: generatePlan.progressMessage,
// Skill selector
showSkillSelector,
setShowSkillSelector,
// Actions
handleStart,
resetMutations,
}
return (
<StartPracticeModalContext.Provider value={value}>
{children}
</StartPracticeModalContext.Provider>
)
}
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