soroban-abacus-flashcards/apps/web/src/contexts/HomeHeroContext.tsx

123 lines
4.0 KiB
TypeScript

'use client'
import type React from 'react'
import { createContext, useContext, useEffect, useMemo, useRef, useState } from 'react'
import type { Subtitle } from '../data/abaciOneSubtitles'
import { subtitles } from '../data/abaciOneSubtitles'
interface HomeHeroContextValue {
subtitle: Subtitle
abacusValue: number
setAbacusValue: (value: number) => void
isHeroVisible: boolean
setIsHeroVisible: (visible: boolean) => void
isAbacusLoaded: boolean
}
const HomeHeroContext = createContext<HomeHeroContextValue | null>(null)
export { HomeHeroContext }
export function HomeHeroProvider({ children }: { children: React.ReactNode }) {
// Use first subtitle for SSR, then select random one on client mount
const [subtitle, setSubtitle] = useState<Subtitle>(subtitles[0])
// Select random subtitle only on client side, persist per-session
useEffect(() => {
// Check if we have a stored subtitle index for this session
const storedIndex = sessionStorage.getItem('heroSubtitleIndex')
if (storedIndex !== null) {
// Use the stored subtitle index
const index = parseInt(storedIndex, 10)
if (!Number.isNaN(index) && index >= 0 && index < subtitles.length) {
setSubtitle(subtitles[index])
return
}
}
// Generate a new random index and store it
const randomIndex = Math.floor(Math.random() * subtitles.length)
sessionStorage.setItem('heroSubtitleIndex', randomIndex.toString())
setSubtitle(subtitles[randomIndex])
}, [])
// Shared abacus value - always start at 0 for SSR/hydration consistency
const [abacusValue, setAbacusValue] = useState(0)
const [isAbacusLoaded, setIsAbacusLoaded] = useState(false)
const isLoadingFromStorage = useRef(false)
// Load from sessionStorage after mount (client-only, no hydration mismatch)
useEffect(() => {
console.log('[HeroAbacus] Loading from sessionStorage...')
isLoadingFromStorage.current = true // Block saves during load
const saved = sessionStorage.getItem('heroAbacusValue')
console.log('[HeroAbacus] Saved value from storage:', saved)
if (saved) {
const parsedValue = parseInt(saved, 10)
console.log('[HeroAbacus] Parsed value:', parsedValue)
if (!Number.isNaN(parsedValue)) {
console.log('[HeroAbacus] Setting abacus value to:', parsedValue)
setAbacusValue(parsedValue)
}
} else {
console.log('[HeroAbacus] No saved value found, staying at 0')
}
// Use setTimeout to ensure the value has been set before we allow saves
setTimeout(() => {
isLoadingFromStorage.current = false
setIsAbacusLoaded(true)
console.log('[HeroAbacus] Load complete, allowing saves now and fading in')
}, 0)
}, [])
// Persist value to sessionStorage when it changes (but skip during load)
useEffect(() => {
console.log(
'[HeroAbacus] Save effect triggered. Value:',
abacusValue,
'isLoadingFromStorage:',
isLoadingFromStorage.current
)
if (!isLoadingFromStorage.current) {
console.log('[HeroAbacus] Saving to sessionStorage:', abacusValue)
sessionStorage.setItem('heroAbacusValue', abacusValue.toString())
console.log(
'[HeroAbacus] Saved successfully. Storage now contains:',
sessionStorage.getItem('heroAbacusValue')
)
} else {
console.log('[HeroAbacus] Skipping save (currently loading from storage)')
}
}, [abacusValue])
// Track hero visibility for nav branding
const [isHeroVisible, setIsHeroVisible] = useState(true)
const value = useMemo(
() => ({
subtitle,
abacusValue,
setAbacusValue,
isHeroVisible,
setIsHeroVisible,
isAbacusLoaded,
}),
[subtitle, abacusValue, isHeroVisible, isAbacusLoaded]
)
return <HomeHeroContext.Provider value={value}>{children}</HomeHeroContext.Provider>
}
export function useHomeHero() {
const context = useContext(HomeHeroContext)
if (!context) {
throw new Error('useHomeHero must be used within HomeHeroProvider')
}
return context
}