import { getDaysInMonth, getLastFirstDayOfWeek, getNextLastDayOfWeek } from "../date/comparators.js";
import { nextTick } from "vue";
import { toCalendar, toCalendarDate } from "@internationalized/date";

//#region src/shared/useCalendarKeyboardNavigation.ts
/**
* Upper bound on focus-search steps when skipping over disabled/unavailable
* days or waiting for an async grid re-render. Covers a generous run of
* consecutive blocked days (more than three weeks) while guaranteeing the
* recursion terminates if no focusable day can be found.
*/
const MAX_FOCUS_RETRIES = 24;
function focusWeekBoundary(options) {
	const { baseDate, boundary, locale, weekStartsOn } = options;
	const target = boundary === "start" ? getLastFirstDayOfWeek(baseDate, weekStartsOn, locale) : getNextLastDayOfWeek(baseDate, weekStartsOn, locale);
	const directionSign = boundary === "start" ? -1 : 1;
	focusDate({
		...options,
		target,
		directionSign,
		allowOutsideView: true
	});
}
function focusPagination(options) {
	const { baseDate, isNext, isYear, isOutsideVisibleView } = options;
	const amount = isNext ? 1 : -1;
	const target = clampTargetDate(getTargetMonthDay(baseDate, isYear ? "year" : "month", amount), options.minValue, options.maxValue);
	const customPageFn = (date) => {
		const pageDate = isYear ? date.add({ years: amount }) : date.add({ months: amount });
		return pageDate.set({ day: 1 });
	};
	if (isOutsideVisibleView(target)) {
		if (isNext && !options.isNextButtonDisabled(customPageFn)) options.nextPage(customPageFn);
		else if (!isNext && !options.isPrevButtonDisabled(customPageFn)) options.prevPage(customPageFn);
	}
	focusDate({
		...options,
		target,
		directionSign: amount
	});
}
function getTargetMonthDay(date, unit, amount) {
	const targetBase = date.add(unit === "month" ? { months: amount } : { years: amount });
	const daysInTargetMonth = getDaysInMonth(targetBase);
	const targetDay = Math.min(date.day, daysInTargetMonth);
	return targetBase.set({ day: targetDay });
}
/** Compares the calendar days of two dates, ignoring their time and type. */
function compareDay(date, reference) {
	return toCalendarDate(date).compare(toCalendarDate(reference));
}
/**
* Moves `date` to the day of `bound`. The result keeps the type, time and
* calendar of `date`, because the grid cells it has to match are built from
* the placeholder and not from `minValue` / `maxValue`.
*/
function setDay(date, bound) {
	const day = toCalendar(toCalendarDate(bound), date.calendar);
	return date.set({
		era: day.era,
		year: day.year,
		month: day.month,
		day: day.day
	});
}
function clampTargetDate(date, minValue, maxValue) {
	let candidateDay = date;
	if (minValue && compareDay(candidateDay, minValue) < 0) candidateDay = setDay(candidateDay, minValue);
	if (maxValue && compareDay(candidateDay, maxValue) > 0) candidateDay = setDay(candidateDay, maxValue);
	return candidateDay;
}
function focusDate(options) {
	const clampedTarget = clampTargetDate(options.target, options.minValue, options.maxValue);
	let safeDirection = 0;
	const isClampedToMin = options.minValue && compareDay(clampedTarget, options.minValue) === 0;
	const isClampedToMax = options.maxValue && compareDay(clampedTarget, options.maxValue) === 0;
	const wasClamped = isClampedToMin || isClampedToMax;
	if (!wasClamped) safeDirection = options.allowOutsideView ? -options.directionSign : options.directionSign;
	else if (isClampedToMin && options.directionSign < 0) safeDirection = 1;
	else if (isClampedToMax && options.directionSign > 0) safeDirection = -1;
	options.onPlaceholderChange(clampedTarget);
	nextTick(() => tryFocusDate(options.parentElement, clampedTarget, safeDirection, 0, options));
}
function tryFocusDate(parentElement, target, directionSign, retries, options) {
	if (retries >= MAX_FOCUS_RETRIES) return;
	const valueSelector = `[data-value='${target.toString()}']`;
	const candidateDay = parentElement.querySelector(`${valueSelector}:not([data-outside-view])`) ?? (options.allowOutsideView ? parentElement.querySelector(valueSelector) : null);
	if (!candidateDay) {
		nextTick(() => tryFocusDate(parentElement, target, directionSign, retries + 1, options));
		return;
	}
	if (candidateDay.hasAttribute("data-disabled") || candidateDay.hasAttribute("data-unavailable")) {
		if (!directionSign) return;
		const nextTarget = clampTargetDate(target.add({ days: directionSign }), options.minValue, options.maxValue);
		if (nextTarget.compare(target) === 0) return;
		options.onPlaceholderChange(nextTarget);
		nextTick(() => tryFocusDate(parentElement, nextTarget, directionSign, retries + 1, options));
		return;
	}
	if (options.allowOutsideView && candidateDay.hasAttribute("data-outside-view") && !candidateDay.hasAttribute("tabindex")) candidateDay.setAttribute("tabindex", "-1");
	candidateDay.focus();
}

//#endregion
export { MAX_FOCUS_RETRIES, clampTargetDate, focusPagination, focusWeekBoundary, getTargetMonthDay };
//# sourceMappingURL=useCalendarKeyboardNavigation.js.map