import { globalState } from '../app/global-state';

export default class KeyboardOpenTracker {
	static bind() {
		if (globalState._keyboardOpenTrackerBound == true) {
			return;
		}

		globalState._keyboardOpenTrackerBound = true;

		const getOrientation = () => {
			if (!globalState.matchMedia) {
				return 'portrait';
			}

			return globalState.matchMedia('(orientation: portrait)').matches ? 'portrait' : 'landscape';
		};

		const getScreenHeight = () => {
			if (!globalState.screen) {
				return 0;
			}

			return globalState.screen.height; // Constant physical screen height
		};

		let lastOrientation = getOrientation();
		const handleResize = () => {
			if (!globalState.windowExists) {
				return;
			}

			const currentOrientation = getOrientation();
			const currentInnerHeight = globalState.visualViewport?.height ?? globalState.innerHeight;
			const screenHeight = getScreenHeight();

			// Different thresholds for portrait/landscape
			const THRESHOLD_PORTRAIT = 300;
			const THRESHOLD_LANDSCAPE = 190;

			const isPortrait = currentOrientation === 'portrait';
			const threshold = isPortrait ? THRESHOLD_PORTRAIT : THRESHOLD_LANDSCAPE;

			// Reset baseline when orientation changes
			if (currentOrientation !== lastOrientation) {
				lastOrientation = currentOrientation;
				return;
			}

			const heightDiff = screenHeight - currentInnerHeight;
			const isKeyboardOpen = heightDiff > threshold;
			document.body.classList.toggle('powerduck-keyboard-open', isKeyboardOpen);
		};

		globalState.addEventListener('resize', handleResize);
		handleResize(); // Run initially
	}
}