CSS Processing and Style Functions

/**
 * CSS processing function that transforms styles with theme integration
 * @param styles - Style object or theme function
 * @returns Function that processes styles with given theme
 */
function css(styles: StyleObjectOrFn): (theme: any) => Record<string, any>;

/**
 * Options for creating CSS processing function
 */
interface GetCSSOptions {
  theme: CssTheme;
  configs?: Config;
  pseudos?: Record<string, CSS.Pseudos | (string & {})>;
}

/**
 * Creates customizable CSS processing function
 * @param options - Configuration options
 * @returns CSS processing function
 */
function getCss(options: GetCSSOptions): (
  styles: Record<string, any>, 
  nested?: boolean
) => Record<string, any>;

/**
 * Style object or function that returns style object
 */
type StyleObjectOrFn = 
  | SystemStyleObject 
  | ((theme: any) => SystemStyleObject);

/**
 * Theme function type that can receive theme and return value
 */
type ThemeThunk<T> = T | ((theme: Record<string, any>) => T);

/**
 * Deep object property access utility
 * @param object - Object to traverse
 * @param path - Property path (dot notation or array)
 * @param fallback - Fallback value if path not found
 * @returns Value at path or fallback
 */
function get<T = any>(
  object: Record<string, any>, 
  path: string | number | (string | number)[], 
  fallback?: T
): T;

/**
 * Memoized version of get function for performance
 */
const memoizedGet: typeof get;

import { css, getCss } from "@chakra-ui/styled-system";

// Basic CSS processing
const buttonStyles = css({
  bg: "blue.500",
  color: "white",
  px: 4,
  py: 2,
  _hover: {
    bg: "blue.600"
  },
  _disabled: {
    opacity: 0.4
  }
});

// Apply with theme
const processedStyles = buttonStyles(theme);
// Result:
// {
//   backgroundColor: "var(--chakra-colors-blue-500)",
//   color: "var(--chakra-colors-white)",
//   paddingLeft: "var(--chakra-space-4)",
//   paddingRight: "var(--chakra-space-4)",
//   paddingTop: "var(--chakra-space-2)",
//   paddingBottom: "var(--chakra-space-2)",
//   "&:hover": {
//     backgroundColor: "var(--chakra-colors-blue-600)"
//   },
//   "&:disabled": {
//     opacity: 0.4
//   }
// }

// Functional styles with theme access
const dynamicStyles = css(({ colors, space }) => ({
  bg: colors.primary,
  p: space[4],
  border: `1px solid ${colors.border}`,
  _dark: {
    bg: colors.primaryDark
  }
}));

// Custom CSS processing
const customCss = getCss({
  theme: myTheme,
  configs: { ...systemProps, customProp: { property: "custom" } },
  pseudos: { _custom: "&[data-custom]" }
});

const customStyles = customCss({
  customProp: "value",
  _custom: { bg: "red.500" }
});

/**
 * Combined interface of all style property interfaces
 */
interface StyleProps extends 
  SpaceProps, ColorProps, LayoutProps, FlexboxProps,
  GridProps, TypographyProps, BorderProps, BackgroundProps,
  EffectProps, FilterProps, TransformProps, TransitionProps,
  PositionProps, InteractivityProps, ListProps, RingProps,
  ScrollProps, TextDecorationProps, OtherProps {}

/**
 * CSS properties enhanced with system overrides
 */
interface SystemCSSProperties extends 
  CSS.Properties, 
  Omit<StyleProps, keyof CSS.Properties> {}

/**
 * CSS properties with responsive value support
 */
type CSSWithMultiValues = {
  [K in keyof SystemCSSProperties]?: 
    K extends keyof StyleProps
      ? StyleProps[K] | PropertyValue<K>
      : PropertyValue<K>;
};

/**
 * Recursive pseudo-selector support
 */
type RecursivePseudo<D> = {
  [K in PseudoKeys]?: PseudoSelectorDefinition<D> & D;
};

/**
 * Recursive CSS selector support  
 */
interface RecursiveCSSSelector<D> {
  [selector: string]: CSSDefinition<D> & D;
}

/**
 * Complete system style object with recursive pseudo and CSS selector support
 */
type SystemStyleObject = RecursiveCSSObject<CSSWithMultiValues>;

/**
 * Style props with pseudo-selector properties
 */
interface SystemProps extends StyleProps, PseudoProps {}

/**
 * Pseudo-selector properties interface
 */
type PseudoProps = {
  [K in PseudoKey]?: SystemStyleObject;
};

import { SystemStyleObject, SystemProps } from "@chakra-ui/styled-system";

// Complete style object with all features
const complexStyles: SystemStyleObject = {
  // Basic styles
  bg: "white",
  color: "gray.800",
  p: 4,
  
  // Responsive values
  fontSize: { base: "md", lg: "lg" },
  width: [300, 400, 500],
  
  // Pseudo-selectors
  _hover: {
    bg: "gray.50",
    transform: "scale(1.02)"
  },
  _focus: {
    outline: "2px solid",
    outlineColor: "blue.500"
  },
  _disabled: {
    opacity: 0.5,
    cursor: "not-allowed"
  },
  
  // Custom CSS selectors
  "& > *": {
    marginBottom: 2
  },
  "&[data-active='true']": {
    bg: "blue.50",
    borderColor: "blue.500"
  },
  
  // Nested responsive and pseudo
  _dark: {
    bg: "gray.800",
    color: "white",
    _hover: {
      bg: "gray.700"
    }
  },
  
  // Media queries
  "@media print": {
    display: "none"
  }
};

// Component props interface
interface ButtonProps extends SystemProps {
  variant?: "solid" | "outline";
  size?: "sm" | "md" | "lg";
}

// Using in component
function Button({ variant = "solid", size = "md", ...styleProps }: ButtonProps) {
  const styles = css({
    // Base styles
    display: "inline-flex",
    alignItems: "center",
    justifyContent: "center",
    
    // Apply style props
    ...styleProps
  });
  
  return styles;
}

/**
 * Merged configuration of all system properties
 */
const systemProps: Config;

/**
 * Array of layout-specific property names
 */
const layoutPropNames: string[];

/**
 * Array of all system property names including pseudo-selectors
 */
const propNames: string[];

/**
 * Checks if a property name is a valid style property
 * @param prop - Property name to check
 * @returns True if the property is a style property
 */
function isStyleProp(prop: string): boolean;

import { 
  systemProps, 
  layoutPropNames, 
  propNames, 
  isStyleProp 
} from "@chakra-ui/styled-system";

// Check if properties are style props
console.log(isStyleProp("bg"));        // true
console.log(isStyleProp("_hover"));    // true  
console.log(isStyleProp("onClick"));   // false

// Filter style props from component props
function separateProps(props: Record<string, any>) {
  const styleProps: Record<string, any> = {};
  const otherProps: Record<string, any> = {};
  
  Object.entries(props).forEach(([key, value]) => {
    if (isStyleProp(key)) {
      styleProps[key] = value;
    } else {
      otherProps[key] = value;
    }
  });
  
  return { styleProps, otherProps };
}

// Get layout-specific props
const layoutProps = layoutPropNames.reduce((acc, prop) => {
  if (prop in props) {
    acc[prop] = props[prop];
  }
  return acc;
}, {} as Record<string, any>);

// Validate props against system
function validateStyleProps(props: Record<string, any>) {
  return Object.keys(props).filter(key => !propNames.includes(key));
}

// Custom system configuration
const customSystem = {
  ...systemProps,
  customSpacing: { property: "margin", scale: "space" },
  customColor: { property: "borderColor", scale: "colors" }
};

/**
 * Expands responsive style objects with breakpoint support
 * @param styles - Style object with potential responsive values
 * @returns Function that processes responsive values with theme breakpoints
 */
function expandResponsive(
  styles: Record<string, any>
): (theme: Record<string, any>) => Record<string, any>;

/**
 * Responsive value types
 */
type ResponsiveValue<T> = T | ResponsiveArray<T> | ResponsiveObject<T>;
type ResponsiveArray<T> = Array<T | null>;
type ResponsiveObject<T> = Partial<Record<string, T>>;

/**
 * CSS theme with breakpoint information
 */
interface CssTheme {
  __breakpoints?: {
    isResponsive: (value: any) => boolean;
    toArrayValue: (value: any) => any[];
    media: string[];
  };
  [key: string]: any;
}

import { expandResponsive } from "@chakra-ui/styled-system";

// Responsive values - array syntax
const arrayResponsive = {
  fontSize: ["sm", "md", "lg", "xl"],  // mobile, tablet, desktop, wide
  padding: [2, 4, 6],                 // mobile, tablet, desktop+
  margin: [1, 2, null, 4]             // mobile, tablet, skip desktop, wide
};

// Responsive values - object syntax  
const objectResponsive = {
  fontSize: { base: "sm", md: "md", lg: "lg" },
  padding: { base: 2, tablet: 4, desktop: 6 },
  display: { base: "block", lg: "flex" }
};

// Process with theme
const processResponsive = expandResponsive(arrayResponsive);
const result = processResponsive(theme);

// Result (example):
// {
//   fontSize: "var(--chakra-fontSizes-sm)",
//   padding: "var(--chakra-space-2)",  
//   margin: "var(--chakra-space-1)",
//   "@media screen and (min-width: 768px)": {
//     fontSize: "var(--chakra-fontSizes-md)",
//     padding: "var(--chakra-space-4)",
//     margin: "var(--chakra-space-2)"
//   },
//   "@media screen and (min-width: 1024px)": {
//     fontSize: "var(--chakra-fontSizes-lg)",
//     padding: "var(--chakra-space-6)"
//   },
//   "@media screen and (min-width: 1280px)": {
//     fontSize: "var(--chakra-fontSizes-xl)",
//     margin: "var(--chakra-space-4)"
//   }
// }

// Custom responsive processing
function processCustomResponsive(
  styles: Record<string, any>,
  customBreakpoints: string[]
) {
  return Object.entries(styles).reduce((acc, [key, value]) => {
    if (Array.isArray(value)) {
      // Process array syntax
      acc[key] = value[0]; // base value
      
      value.slice(1).forEach((val, index) => {
        if (val != null && customBreakpoints[index]) {
          acc[customBreakpoints[index]] = acc[customBreakpoints[index]] || {};
          acc[customBreakpoints[index]][key] = val;
        }
      });
    } else {
      acc[key] = value;
    }
    
    return acc;
  }, {} as Record<string, any>);
}

// Import all CSS processing utilities
import { 
  css, 
  getCss, 
  systemProps, 
  isStyleProp, 
  propNames,
  layoutPropNames,
  expandResponsive
} from "@chakra-ui/styled-system";

// Import specific modules
import { css } from "@chakra-ui/styled-system/css";
import { systemProps } from "@chakra-ui/styled-system/system";

// Import types
import type {
  SystemStyleObject,
  SystemProps,
  StyleObjectOrFn,
  StyleProps,
  SystemCSSProperties,
  ResponsiveValue,
  CssTheme,
  ThemeThunk
} from "@chakra-ui/styled-system";