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hooks/use-app-theme.ts

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+/**
+ * Custom hook for easy theme access throughout the app
+ * Provides styled components and theme utilities
+ */
+
+import { useThemeContext } from "@/hooks/use-theme-context";
+import { useMemo } from "react";
+import { StyleSheet, TextStyle, ViewStyle } from "react-native";
+
+export function useAppTheme() {
+  const { colors, colorScheme, themeMode, setThemeMode, getColor } =
+    useThemeContext();
+
+  // Common styled components
+  const styles = useMemo(
+    () =>
+      StyleSheet.create({
+        // Container styles
+        container: {
+          flex: 1,
+          backgroundColor: colors.background,
+        } as ViewStyle,
+
+        surface: {
+          backgroundColor: colors.surface,
+          borderRadius: 12,
+          padding: 16,
+        } as ViewStyle,
+
+        card: {
+          backgroundColor: colors.card,
+          borderRadius: 12,
+          padding: 16,
+          shadowColor: colors.text,
+          shadowOffset: { width: 0, height: 2 },
+          shadowOpacity: 0.1,
+          shadowRadius: 4,
+          elevation: 3,
+        } as ViewStyle,
+
+        // Button styles
+        primaryButton: {
+          backgroundColor: colors.primary,
+          paddingVertical: 14,
+          paddingHorizontal: 20,
+          borderRadius: 12,
+          alignItems: "center",
+          justifyContent: "center",
+        } as ViewStyle,
+
+        secondaryButton: {
+          backgroundColor: colors.backgroundSecondary,
+          borderWidth: 1,
+          borderColor: colors.border,
+          paddingVertical: 14,
+          paddingHorizontal: 20,
+          borderRadius: 12,
+          alignItems: "center",
+          justifyContent: "center",
+        } as ViewStyle,
+
+        // Text styles
+        primaryButtonText: {
+          color: "#ffffff",
+          fontSize: 16,
+          fontWeight: "600",
+        } as TextStyle,
+
+        secondaryButtonText: {
+          color: colors.text,
+          fontSize: 16,
+          fontWeight: "600",
+        } as TextStyle,
+
+        // Input styles
+        textInput: {
+          backgroundColor: colors.surface,
+          borderWidth: 1,
+          borderColor: colors.border,
+          borderRadius: 8,
+          paddingVertical: 12,
+          paddingHorizontal: 16,
+          fontSize: 16,
+          color: colors.text,
+        } as ViewStyle & TextStyle,
+
+        // Separator
+        separator: {
+          height: 1,
+          backgroundColor: colors.separator,
+        } as ViewStyle,
+
+        // Status styles
+        successContainer: {
+          backgroundColor: `${colors.success}20`,
+          borderColor: colors.success,
+          borderWidth: 1,
+          borderRadius: 8,
+          padding: 12,
+        } as ViewStyle,
+
+        warningContainer: {
+          backgroundColor: `${colors.warning}20`,
+          borderColor: colors.warning,
+          borderWidth: 1,
+          borderRadius: 8,
+          padding: 12,
+        } as ViewStyle,
+
+        errorContainer: {
+          backgroundColor: `${colors.error}20`,
+          borderColor: colors.error,
+          borderWidth: 1,
+          borderRadius: 8,
+          padding: 12,
+        } as ViewStyle,
+      }),
+    [colors]
+  );
+
+  // Theme utilities
+  const utils = useMemo(
+    () => ({
+      // Get opacity color
+      getOpacityColor: (
+        colorName: keyof typeof colors,
+        opacity: number = 0.1
+      ) => {
+        const color = colors[colorName];
+        const hex = color.replace("#", "");
+        const r = parseInt(hex.substring(0, 2), 16);
+        const g = parseInt(hex.substring(2, 4), 16);
+        const b = parseInt(hex.substring(4, 6), 16);
+        return `rgba(${r}, ${g}, ${b}, ${opacity})`;
+      },
+
+      // Check if current theme is dark
+      isDark: colorScheme === "dark",
+
+      // Check if current theme is light
+      isLight: colorScheme === "light",
+
+      // Toggle between light and dark (ignoring system)
+      toggleTheme: () => {
+        const newMode = colorScheme === "dark" ? "light" : "dark";
+        setThemeMode(newMode);
+      },
+    }),
+    [colors, colorScheme, setThemeMode]
+  );
+
+  return {
+    colors,
+    styles,
+    utils,
+    colorScheme,
+    themeMode,
+    setThemeMode,
+    getColor,
+  };
+}
+
+export type AppTheme = ReturnType<typeof useAppTheme>;