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import { useState, useMemo } from "react";
import { Button } from "@/components/ui/button";
import { Card } from "@/components/ui/card";
import { Text } from "@/components/ui/text";
import { cn } from "@/utils/class-name";
const MONTHS = [
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December",
];
// Monday-first week headers; Sa/Su (indices 5-6) always dimmed.
const WEEK_HEADERS = ["Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"];
// Mirrors DATE_PICKER_TIME_SLOT from the reference.
type TimeSlot = "all_day" | "morning" | "afternoon";
// Mirrors DATE_PICKER_RANGE_SELECTION.
type RangeSelection = "start" | "end";
// Two pressable slot options (mirrors TIME_SLOT_OPTIONS).
const SLOT_OPTIONS = [
{ label: "Morning", value: "morning" as const },
{ label: "Afternoon", value: "afternoon" as const },
];
// Work-schedule boundaries used in calculateLeaveDays (mirrors WORK_HOURS in date.ts).
const WORK_SHIFTS = [
{ startH: 8, startM: 0, endH: 12, endM: 0 }, // morning block: 4 h
{ startH: 13, startM: 30, endH: 17, endM: 30 }, // afternoon block: 4 h
] as const;
const HOURS_PER_DAY = 8;
function buildIso(y: number, m: number, d: number): string {
return `${y}-${String(m + 1).padStart(2, "0")}-${String(d).padStart(2, "0")}`;
}
function getTodayIso(): string {
const n = new Date();
return buildIso(n.getFullYear(), n.getMonth(), n.getDate());
}
function isWeekend(iso: string): boolean {
const [y, m, d] = iso.split("-").map(Number);
const dow = new Date(y, m - 1, d).getDay();
return dow === 0 || dow === 6;
}
function getNextWorkingDay(fromIso: string): string {
const d = new Date(fromIso + "T00:00:00");
d.setDate(d.getDate() + 1);
while (d.getDay() === 0 || d.getDay() === 6) d.setDate(d.getDate() + 1);
return buildIso(d.getFullYear(), d.getMonth(), d.getDate());
}
function buildCalendarGrid(year: number, month: number): (string | null)[] {
const firstDow = new Date(year, month, 1).getDay(); // 0 = Sun
const offset = (firstDow + 6) % 7; // Mon-first offset
const daysInMonth = new Date(year, month + 1, 0).getDate();
const grid: (string | null)[] = Array(offset).fill(null);
for (let d = 1; d <= daysInMonth; d++) grid.push(buildIso(year, month, d));
while (grid.length % 7 !== 0) grid.push(null);
return grid;
}
// "Apr 29" — mirrors formatDateWithWeekday (short form, current-year only).
function fmtDate(iso: string): string {
const [y, m, d] = iso.split("-").map(Number);
return new Date(y, m - 1, d).toLocaleDateString("en-US", {
weekday: "short",
month: "short",
day: "numeric",
});
}
// Calendar days between two ISO dates (inclusive) — mirrors getInclusiveDaysInRange.
// Counts ALL calendar days, not just workdays; used to detect single vs multi-day.
function getInclusiveDays(start: string | null, end: string | null): number {
if (!start) return 0;
if (!end) return 1; // single-day selection
const s = new Date(start + "T00:00:00").getTime();
const e = new Date(end + "T00:00:00").getTime();
return Math.floor((e - s) / (24 * 60 * 60 * 1000)) + 1;
}
// Apply slot-based time boundaries to an ISO date string — mirrors applyTimeSlotsToRange.
// start boundary: all_day|morning → 08:00, afternoon → 13:30
// end boundary: all_day|afternoon → 17:30, morning → 12:00
function applySlotTime(
isoDate: string,
slot: TimeSlot,
boundary: "start" | "end",
): Date {
const d = new Date(isoDate + "T00:00:00");
if (boundary === "start") {
if (slot === "afternoon") {
d.setHours(13, 30, 0, 0);
} else {
d.setHours(8, 0, 0, 0);
}
} else {
if (slot === "morning") {
d.setHours(12, 0, 0, 0);
} else {
d.setHours(17, 30, 0, 0);
}
}
return d;
}
// Exact port of calculateLeaveDays from date.ts:
// sums work-shift overlap hours for every weekday in [start, end], divides by 8.
function calculateLeaveDays(start: Date, end: Date): number {
if (end <= start) return 0;
let totalHours = 0;
const cur = new Date(start);
cur.setHours(0, 0, 0, 0);
while (cur <= end) {
if (cur.getDay() !== 0 && cur.getDay() !== 6) {
for (const shift of WORK_SHIFTS) {
const shiftStart = new Date(cur);
shiftStart.setHours(shift.startH, shift.startM, 0, 0);
const shiftEnd = new Date(cur);
shiftEnd.setHours(shift.endH, shift.endM, 0, 0);
const overlapMs = Math.max(
0,
Math.min(end.getTime(), shiftEnd.getTime()) -
Math.max(start.getTime(), shiftStart.getTime()),
);
totalHours += overlapMs / (1000 * 60 * 60);
}
}
cur.setDate(cur.getDate() + 1);
}
return Number((totalHours / HOURS_PER_DAY).toFixed(2));
}
// Mirrors calculateRangeDaysOff from utils.ts.
// For single-day (no end): end slot mirrors start slot (matches effectiveRangeEndTimeSlot logic).
function computeDaysOff(
start: string | null,
end: string | null,
startSlot: TimeSlot,
endSlot: TimeSlot,
): number {
if (!start) return 0;
const effectiveEnd = end ?? start;
// Single-day: end-slot mirrors start-slot (reference: effectiveRangeEndTimeSlot = rangeStartTimeSlot).
const effectiveEndSlot: TimeSlot = end ? endSlot : startSlot;
const startDate = applySlotTime(start, startSlot, "start");
const endDate = applySlotTime(effectiveEnd, effectiveEndSlot, "end");
return calculateLeaveDays(startDate, endDate);
}
// Mirrors formatDaysOff from date.ts (without the startTime half-day special case,
// which is only used in calendar event contexts, not the picker summary).
function formatDaysOff(days: number): string {
const n =
days % 1 === 0 ? days.toString() : Number(days.toFixed(1)).toString();
return `${n} day${days === 1 ? "" : "s"} off`;
}
// For multi-day ranges: MORNING is invalid for the start boundary (you can only
// set AFTERNOON or leave it ALL_DAY); AFTERNOON is invalid for the end boundary.
// Mirrors getBlockedMultiDaySlot.
function getBlockedSlot(selection: RangeSelection): "morning" | "afternoon" {
return selection === "start" ? "morning" : "afternoon";
}
// Mirrors getNextSlot: pressing the currently-active half-slot reverts to all_day.
function getNextSlot(
pressed: "morning" | "afternoon",
current: TimeSlot,
): TimeSlot {
return current === pressed ? "all_day" : pressed;
}
type DateRangePickerCardProps = {
onSubmit: (message: string) => void;
disabled?: boolean;
};
export function DateRangePickerCard({
onSubmit,
disabled,
}: DateRangePickerCardProps) {
const [today] = useState(getTodayIso);
const now = new Date();
const curYear = now.getFullYear();
const curMonth = now.getMonth();
// Calendar navigation.
const [viewYear, setViewYear] = useState(curYear);
const [viewMonth, setViewMonth] = useState(curMonth);
// Date selection state — mirrors tempRange in useDatePickerDraftState.
// endDate = null means single-day (mirrors getDraftRangeValue nullifying equal-day end).
const [startDate, setStartDate] = useState<string | null>(() =>
getNextWorkingDay(today),
);
const [endDate, setEndDate] = useState<string | null>(null);
// Time slot state — mirrors rangeStartTimeSlot / rangeEndTimeSlot.
const [rangeStartSlot, setRangeStartSlot] = useState<TimeSlot>("all_day");
const [rangeEndSlot, setRangeEndSlot] = useState<TimeSlot>("all_day");
// Which boundary the slot buttons are currently editing — mirrors activeRangeSelection.
const [activeSelection, setActiveSelection] =
useState<RangeSelection>("start");
const grid = useMemo(
() => buildCalendarGrid(viewYear, viewMonth),
[viewYear, viewMonth],
);
// Derived selection geometry.
const selectedDays = getInclusiveDays(startDate, endDate); // calendar days, not workdays
const isMultiDay = selectedDays > 1; // true only when endDate is set & different
const canGoPrev =
viewYear > curYear || (viewYear === curYear && viewMonth > curMonth);
const canConfirm = selectedDays > 0; // single-day or range both valid
// The slot that the slot buttons are currently reflecting — mirrors tempTimeSlot.
const activeBoundarySlot: TimeSlot = isMultiDay
? activeSelection === "start"
? rangeStartSlot
: rangeEndSlot
: rangeStartSlot;
// Days-off value for the summary.
const daysOff = computeDaysOff(
startDate,
endDate,
rangeStartSlot,
rangeEndSlot,
);
// Summary texts — mirrors summaryDateText / summaryValueText.
// summaryDate always shows the start date (reference code returns startDate||endDate for both branches).
const summaryDateText: string | null = startDate ? fmtDate(startDate) : null;
const summaryValueText: string | null = (() => {
if (!startDate) return null;
if (!isMultiDay) {
if (rangeStartSlot === "morning") return "Morning";
if (rangeStartSlot === "afternoon") return "Afternoon";
return formatDaysOff(1); // "1 day off"
}
return formatDaysOff(daysOff);
})();
function resetSlots() {
setRangeStartSlot("all_day");
setRangeEndSlot("all_day");
}
function goMonth(delta: number) {
let m = viewMonth + delta;
let y = viewYear;
if (m < 0) {
m = 11;
y--;
}
if (m > 11) {
m = 0;
y++;
}
if (y < curYear || (y === curYear && m < curMonth)) return;
setViewYear(y);
setViewMonth(m);
}
// Mirrors useDatePickerDisabledDates.isDateDisabledByProp + rangeDisabledDates.
function isDateDisabled(iso: string): boolean {
if (iso < today) return true;
if (isWeekend(iso)) return true;
// Range-end constraint: when picking end from a MORNING single-day start,
// dates after start are disabled (MORNING implies same-day half-day only).
// Mirrors rangeEndConstraint === "disable_after_start".
if (
startDate &&
!endDate &&
rangeStartSlot === "morning" &&
iso > startDate
) {
return true;
}
return false;
}
// Mirrors useDatePickerRangeSelection.handleRangeChange, adapted for direct clicks.
function handleDay(iso: string) {
if (disabled || isDateDisabled(iso)) return;
const hadStart = startDate !== null;
const hadEnd = endDate !== null;
// Mirrors: isStartingNewCycle when hadEnd && hasStart && !hasEnd.
if (hadStart && hadEnd) {
setStartDate(iso);
setEndDate(null);
resetSlots();
setActiveSelection("start");
return;
}
if (!hadStart) {
setStartDate(iso);
setEndDate(null);
resetSlots();
setActiveSelection("start");
return;
}
const prevStart = startDate!;
// Same date → single-day already confirmed, no-op.
if (iso === prevStart) return;
// Clicked before start → replace with new single-day start (reset all slots).
// Mirrors: isReplacingExistingSingleDaySelection → all slots → ALL_DAY.
if (iso < prevStart) {
setStartDate(iso);
setEndDate(null);
resetSlots();
setActiveSelection("start");
return;
}
// Clicked after start → extend to multi-day range.
// Mirrors: isExtendingSingleDaySelectionToRange → keep start slot, reset end slot,
// activeRangeSelection → "end".
setEndDate(iso);
setRangeEndSlot("all_day"); // end slot always starts fresh
setActiveSelection("end");
}
function handleClear() {
setStartDate(null);
setEndDate(null);
resetSlots();
setActiveSelection("start");
}
// Mirrors useDatePickerTimeSlot.handleSelectTimeSlot.
function handleSelectTimeSlot(slot: "morning" | "afternoon") {
if (selectedDays <= 0) return;
// Blocked slot guard (mirrors getBlockedMultiDaySlot).
if (isMultiDay && getBlockedSlot(activeSelection) === slot) return;
// Toggle logic: same slot → all_day (mirrors getNextSlot).
const nextSlot = getNextSlot(slot, activeBoundarySlot);
if (!isMultiDay) {
setRangeStartSlot(nextSlot);
} else if (activeSelection === "start") {
setRangeStartSlot(nextSlot);
} else {
setRangeEndSlot(nextSlot);
}
}
// Mirrors isTimeSlotDisabled.
function isSlotDisabled(slot: "morning" | "afternoon"): boolean {
if (selectedDays <= 0) return true;
if (!isMultiDay) return false;
return getBlockedSlot(activeSelection) === slot;
}
// Mirrors resolveHalfSelectionSlot from useDatePickerCalendarConfig.
function getCellHalfSlot(iso: string): TimeSlot | null {
const isStart = iso === startDate;
const isEnd = iso === endDate;
if (!isStart && !isEnd) return null;
if (!isMultiDay) {
// Single-day: start cell reflects rangeStartSlot.
return isStart ? rangeStartSlot : null;
}
if (isStart) return rangeStartSlot;
if (isEnd) return rangeEndSlot;
return null;
}
function handleConfirm() {
if (!startDate) return;
if (!endDate) {
// Single-day submission.
if (rangeStartSlot !== "all_day") {
onSubmit(`${rangeStartSlot} of ${startDate}`);
} else {
onSubmit(`${startDate} to ${startDate}`);
}
return;
}
// Multi-day: encode half-day boundaries as text for the agent.
const startPart =
rangeStartSlot === "afternoon" ? `afternoon of ${startDate}` : startDate;
const endPart =
rangeEndSlot === "morning" ? `morning of ${endDate}` : endDate;
onSubmit(`${startPart} to ${endPart}`);
}
return (
<Card className="w-fit max-w-full px-4 py-3 shadow-[0_10px_26px_rgba(7,12,30,0.25)]">
<Text as="p" variant="sectionTitle">
Select dates
</Text>
{/* Month navigation — bordered square buttons matching calendarNavButton style */}
<div className="mt-3 flex items-center justify-between gap-2">
<button
type="button"
aria-label="Previous month"
onClick={() => goMonth(-1)}
disabled={!canGoPrev || disabled}
className="flex h-7 w-7 items-center justify-center rounded border border-white/16 text-white/60 transition hover:bg-white/10 hover:text-white disabled:cursor-not-allowed disabled:opacity-30"
>
<svg
viewBox="0 0 16 16"
fill="none"
strokeLinecap="round"
strokeLinejoin="round"
className="h-3.5 w-3.5"
>
<path d="M10 3L5 8l5 5" stroke="currentColor" strokeWidth="1.6" />
</svg>
</button>
<span className="font-dm-sans text-sm font-bold text-white">
{MONTHS[viewMonth]} {viewYear}
</span>
<button
type="button"
aria-label="Next month"
onClick={() => goMonth(1)}
disabled={disabled}
className="flex h-7 w-7 items-center justify-center rounded border border-white/16 text-white/60 transition hover:bg-white/10 hover:text-white disabled:cursor-not-allowed disabled:opacity-30"
>
<svg
viewBox="0 0 16 16"
fill="none"
strokeLinecap="round"
strokeLinejoin="round"
className="h-3.5 w-3.5"
>
<path d="M6 3l5 5-5 5" stroke="currentColor" strokeWidth="1.6" />
</svg>
</button>
</div>
{/* Calendar grid */}
<div className="mt-2 grid grid-cols-7">
{WEEK_HEADERS.map((h, i) => (
<div
key={`hdr-${i}`}
className={cn(
"py-1 text-center font-dm-sans text-xs font-bold uppercase tracking-wide",
i >= 5 ? "text-white/18" : "text-white/40",
)}
>
{h}
</div>
))}
{grid.map((iso, idx) => {
if (!iso) return <div key={`e-${idx}`} />;
const isDisabledCell = isDateDisabled(iso);
const isWknd = isWeekend(iso);
const isStart = iso === startDate;
const isEnd = iso === endDate;
const isSelected = isStart || isEnd;
const isToday = iso === today;
const inRange =
isMultiDay && iso > startDate! && iso < endDate! && !isWknd;
// Half-day slot for this cell (null → no half-day visual).
const halfSlot = getCellHalfSlot(iso);
const showHalf = isSelected && !!halfSlot && halfSlot !== "all_day";
return (
<div
key={iso}
className="relative flex h-8 w-full items-center justify-center"
>
{inRange && (
<div className="absolute top-0.5 bottom-0.5 left-0 right-0 bg-white/20 rounded-none" />
)}
{/* Right-half band extending from start pill into the range */}
{isStart && isMultiDay && (
<div className="absolute top-0.5 bottom-0.5 left-1/2 right-0 bg-white/20" />
)}
{/* Left-half band extending from range into end pill */}
{isEnd && isMultiDay && (
<div className="absolute top-0.5 bottom-0.5 left-0 right-1/2 bg-white/20" />
)}
{/* Day button */}
<button
type="button"
onClick={() => handleDay(iso)}
disabled={disabled || isDisabledCell}
className={cn(
"relative z-10 flex h-7 w-7 items-center justify-center overflow-hidden rounded-full font-dm-sans text-xs transition",
// Full white pill when selected without half-day slot.
isSelected &&
!showHalf &&
"bg-white font-semibold text-slate-900",
// No bg on pill when half-day — gradient overlay below provides it.
isSelected && showHalf && "font-semibold",
// Disabled (weekend / past / constraint).
!isSelected &&
isWknd &&
"cursor-not-allowed select-none text-white/18",
!isSelected &&
!isWknd &&
isDisabledCell &&
"cursor-not-allowed text-white/22",
// In-range dates — brighter text on the tinted band.
!isSelected &&
inRange &&
"text-white font-medium hover:bg-white/10",
// Normal interactive states.
!isSelected &&
!inRange &&
!isDisabledCell &&
isToday &&
"ring-1 ring-white/35 text-white hover:bg-white/10",
!isSelected &&
!inRange &&
!isDisabledCell &&
!isToday &&
"text-white/72 hover:bg-white/10",
)}
>
{showHalf && (
<span
className={cn(
"pointer-events-none absolute inset-0 rounded-full",
halfSlot === "morning"
? "bg-[linear-gradient(to_right,white_50%,transparent_50%)]"
: "bg-[linear-gradient(to_right,transparent_50%,white_50%)]",
)}
/>
)}
{/* Day number sits on top of the gradient overlay. */}
<span
className={cn(
"relative z-10",
isSelected && "text-slate-900",
)}
>
{Number(iso.slice(8))}
</span>
</button>
</div>
);
})}
</div>
{/* Visible as soon as a start date is selected — mirrors DatePickerTimeOffSection. */}
{startDate && (
<>
<div className="mt-3 h-px bg-white/10" />
<div className="mt-3 flex gap-2">
{SLOT_OPTIONS.map(({ label, value }) => {
const isActive = activeBoundarySlot === value;
const isDisabledSlot = disabled || isSlotDisabled(value);
return (
<button
key={value}
type="button"
disabled={isDisabledSlot}
onClick={() => handleSelectTimeSlot(value)}
className={cn(
"flex-1 rounded border py-2 font-dm-sans text-sm font-medium transition",
isActive && !isDisabledSlot
? "border-white/30 bg-white/16 text-white"
: "border-white/14 text-white/40 hover:bg-white/8 hover:text-white/70",
isDisabledSlot && "cursor-not-allowed opacity-40",
)}
>
{label}
</button>
);
})}
</div>
</>
)}
{/* Mirrors summaryContainer / summaryDate / summaryDaysOff — always shows startDate. */}
{summaryDateText && (
<>
<div className="mt-3 h-px bg-white/10" />
<div className="mt-2 flex flex-col items-end gap-0.5">
<span className="font-dm-sans text-sm text-white/50">
{summaryDateText}
</span>
<span className="font-dm-sans text-sm font-bold text-white">
{summaryValueText}
</span>
</div>
</>
)}
{/* ── Actions ── */}
<div className="mt-3 flex items-center justify-end gap-2">
{startDate && (
<button
type="button"
disabled={disabled}
onClick={handleClear}
className="shrink-0 font-dm-sans text-xs text-white/30 transition hover:text-white/60"
>
Clear
</button>
)}
<Button
type="button"
size="sm"
variant="primary"
disabled={!canConfirm || disabled}
onClick={handleConfirm}
>
Confirm
</Button>
</div>
</Card>
);
}
|