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import { KOREAN_COLORS, FONT_FAMILY } from "../../types/constants";
import { toHex } from "../../utils/colorUtils";
// Constants
// Small delay to show loading state for visual feedback.
// 100ms is sufficient for users to perceive the state change
// without feeling sluggish. This value can be tuned for UX.
const LOADING_DELAY_MS = 100;
// Pre-compute hex colors from Korean color constants
const HEX_COLORS = {
PRIMARY_CYAN: toHex(KOREAN_COLORS.PRIMARY_CYAN),
ACCENT_GOLD: toHex(KOREAN_COLORS.ACCENT_GOLD),
} as const;
export interface SplashScreenProps {
readonly onStart: () => void;
readonly width: number;
readonly height: number;
}
/**
* Splash screen that requires user interaction before starting the game.
* This is necessary to initialize AudioContext which requires a user gesture.
*/
export const SplashScreen: React.FC<SplashScreenProps> = ({
onStart,
width,
height,
}) => {
const [isLoading, setIsLoading] = useState(false);
// Memoize responsive breakpoint calculation
const isMobile = useMemo(() => width < 768, [width]);
// Memoize responsive layout values
const layoutCalculation = useMemo(() => ({
titleFontSize: isMobile ? 36 : 64,
subtitleFontSize: isMobile ? 16 : 24,
bodyFontSize: isMobile ? 12 : 14,
instructionsFontSize: isMobile ? 11 : 12,
buttonPadding: isMobile ? "16px 48px" : "20px 60px",
buttonFontSize: isMobile ? 16 : 20,
}), [isMobile]);
const handleStart = useCallback(() => {
setIsLoading(true);
// Small delay to show loading state
setTimeout(() => {
onStart();
}, LOADING_DELAY_MS);
}, [onStart]);
return (
<div
style={{
width,
height,
display: "flex",
flexDirection: "column",
justifyContent: "center",
alignItems: "center",
background: "linear-gradient(180deg, #0a0f12 0%, #1a1a2e 100%)",
color: "#fff",
fontFamily: FONT_FAMILY.CYBER,
position: "relative",
overflow: "hidden",
}}
data-testid="splash-screen"
>
{/* Animated background grid - decorative only */}
<div
role="presentation"
aria-hidden="true"
style={{
position: "absolute",
inset: 0,
background: `
repeating-linear-gradient(
0deg,
transparent,
transparent 50px,
#${HEX_COLORS.PRIMARY_CYAN}08 50px,
#${HEX_COLORS.PRIMARY_CYAN}08 51px
),
repeating-linear-gradient(
90deg,
transparent,
transparent 50px,
#${HEX_COLORS.PRIMARY_CYAN}08 50px,
#${HEX_COLORS.PRIMARY_CYAN}08 51px
)
`,
opacity: 0.3,
}}
/>
{/* Screen reader live region for loading state */}
<div
aria-live="polite"
aria-atomic="true"
style={{
position: "absolute",
left: "-10000px",
width: "1px",
height: "1px",
overflow: "hidden",
}}
>
{isLoading ? "Initializing audio and loading game" : "Ready to start"}
</div>
{/* Logo/Title */}
<div
style={{
marginBottom: "60px",
textAlign: "center",
zIndex: 1,
}}
>
<h1
style={{
fontSize: `${layoutCalculation.titleFontSize}px`,
fontWeight: 900,
color: `#${HEX_COLORS.PRIMARY_CYAN}`,
textShadow: `0 0 20px #${HEX_COLORS.PRIMARY_CYAN}80`,
marginBottom: "20px",
letterSpacing: "4px",
}}
>
흑괘
</h1>
<h2
style={{
fontSize: `${layoutCalculation.subtitleFontSize}px`,
fontWeight: 400,
color: `#${HEX_COLORS.ACCENT_GOLD}`,
letterSpacing: "2px",
marginTop: 0,
}}
>
BLACK TRIGRAM
</h2>
<p
style={{
fontSize: `${layoutCalculation.bodyFontSize}px`,
color: "#aaa",
marginTop: "20px",
letterSpacing: "1px",
}}
>
Korean Martial Arts Dojang
</p>
</div>
{/* Start Button */}
<button
onClick={handleStart}
disabled={isLoading}
aria-label={isLoading ? "Starting game and initializing audio" : "Start game and initialize audio"}
aria-busy={isLoading}
aria-describedby="splash-instructions"
style={{
padding: layoutCalculation.buttonPadding,
fontSize: `${layoutCalculation.buttonFontSize}px`,
fontFamily: FONT_FAMILY.CYBER,
fontWeight: 700,
color: isLoading ? "#666" : "#000",
background: isLoading
? "#333"
: `linear-gradient(135deg, #${HEX_COLORS.PRIMARY_CYAN} 0%, #${HEX_COLORS.ACCENT_GOLD} 100%)`,
border: "none",
borderRadius: "8px",
cursor: isLoading ? "not-allowed" : "pointer",
textTransform: "uppercase",
letterSpacing: "2px",
transition: "all 0.3s ease",
boxShadow: isLoading
? "none"
: `0 4px 20px #${HEX_COLORS.PRIMARY_CYAN}40`,
position: "relative",
zIndex: 1,
opacity: isLoading ? 0.6 : 1,
}}
onMouseEnter={(e) => {
Eif (!isLoading) {
e.currentTarget.style.transform = "scale(1.05)";
e.currentTarget.style.boxShadow = `0 6px 30px #${HEX_COLORS.PRIMARY_CYAN}60`;
}
}}
onMouseLeave={(e) => {
if (!isLoading) {
e.currentTarget.style.transform = "scale(1)";
e.currentTarget.style.boxShadow = `0 4px 20px #${HEX_COLORS.PRIMARY_CYAN}40`;
}
}}
data-testid="splash-start-button"
>
{isLoading ? "시작 중... Starting..." : "시작 | Start"}
</button>
{/* Instructions */}
<div
id="splash-instructions"
style={{
marginTop: "40px",
textAlign: "center",
color: "#888",
fontSize: `${layoutCalculation.instructionsFontSize}px`,
maxWidth: "600px",
padding: "0 20px",
zIndex: 1,
}}
>
<p style={{ margin: "8px 0" }}>
Audio initialization requires user interaction
</p>
<p style={{ margin: "8px 0" }}>
Click the button above to enable sound and start the game
</p>
</div>
{/* Version info */}
<div
role="contentinfo"
aria-label={`Application version ${typeof APP_VERSION !== "undefined" ? APP_VERSION : "0.5.3"}`}
style={{
position: "absolute",
bottom: "20px",
right: "20px",
color: "#555",
fontSize: "10px",
zIndex: 1,
}}
>
v{typeof APP_VERSION !== "undefined" ? APP_VERSION : "0.5.3"}
</div>
</div>
);
};
export default SplashScreen;
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