70 lines
1.7 KiB
TypeScript
70 lines
1.7 KiB
TypeScript
import React, {
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createContext,
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useContext,
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useState,
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useEffect,
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ReactNode,
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} from 'react';
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import { useColorScheme } from 'react-native';
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import { colors } from './colors';
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export type ThemeMode = 'light' | 'dark' | 'system';
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export type ThemeColors = typeof colors.light | typeof colors.dark;
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interface ThemeContextValue {
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mode: ThemeMode;
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theme: ThemeColors;
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toggleTheme: () => void;
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isDark: boolean;
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setMode: (mode: ThemeMode) => void;
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}
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const ThemeContext = createContext<ThemeContextValue>({
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mode: 'system',
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theme: colors.light,
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toggleTheme: () => {},
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isDark: false,
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setMode: () => {},
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});
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export const ThemeProvider = ({ children }: { children: ReactNode }) => {
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const systemColorScheme = useColorScheme(); // 'light' | 'dark' | null
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const [userMode, setUserMode] = useState<ThemeMode>('system');
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// Determine current effective mode
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const getEffectiveMode = (): 'light' | 'dark' => {
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if (userMode === 'system') {
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return systemColorScheme === 'dark' ? 'dark' : 'light';
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}
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return userMode;
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};
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const effectiveMode = getEffectiveMode();
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const isDark = effectiveMode === 'dark';
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const theme = isDark ? colors.dark : colors.light;
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const toggleTheme = () => {
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setUserMode(prev => {
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if (prev === 'system') {
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return systemColorScheme === 'dark' ? 'light' : 'dark';
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}
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return prev === 'light' ? 'dark' : 'light';
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});
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};
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const value: ThemeContextValue = {
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mode: userMode,
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theme,
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toggleTheme,
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isDark,
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setMode: setUserMode,
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};
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return (
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<ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>
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);
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};
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// Simple hook — use this everywhere
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export const useTheme = () => useContext(ThemeContext);
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