Date picker

- Popover root wraps both the trigger and the clear button; the clear button
  is a sibling positioned `absolute end-1` so buttons are never nested.
- The calendar mounts each time the popover opens, so `defaultMonth` follows
  the current value and `autoFocus` moves focus into the grid.
- Field text is built with `Intl.DateTimeFormat#format` pieces rather than
  `formatRange`, whose separator spacing differs between ICU builds and broke
  hydration. Same-year ranges drop the year from the start date.
- Presets compare by day with `isSameDay` to mark the active one.
- The presets column is `bg-muted/40` with a hairline end border; the active
  preset uses the raised recipe (`bg-card ring-hairline shadow-raised-xs
inset-shadow-highlight`) plus an ember dot.

<!-- PEBBLE-LICENSE -->

registry/input/date-picker/date-picker.tsx

"use client";

/* PEBBLE-LICENSE
Built by Pebble. Component: date-picker.

First-party license: MIT

The following first-party terms apply only to original Pebble material.

MIT License

Copyright (c) 2026 Praxys Solutions LLC (Pebble)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
END PEBBLE-LICENSE */

import * as React from "react";

import { cn } from "@/lib/utils";
import {
  Calendar,
  isSameDay,
  type DateMatcher,
  type DateRange,
} from "@/registry/data/calendar/calendar";
import { Popover, PopoverContent, PopoverTrigger } from "@/registry/overlay/popover/popover";

// Re-export the local binding so source-copy installers only rewrite the import.
export type { DateRange };

export type DatePreset<T> = { label: string; value: T };

type DatePickerBaseProps = {
  placeholder?: string;
  min?: Date;
  max?: Date;
  /** Blocked days, passed to the calendar. */
  disabledDates?: DateMatcher;
  /** Disables the whole field. */
  disabled?: boolean;
  invalid?: boolean;
  /** Show the clear button while a value is set. */
  clearable?: boolean;
  /** Day marked as today in the calendar. */
  today?: Date;
  locale?: string;
  weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6;
  /** Intl options for the field text. */
  formatOptions?: Intl.DateTimeFormatOptions;
  open?: boolean;
  defaultOpen?: boolean;
  onOpenChange?: (open: boolean) => void;
  id?: string;
  name?: string;
  className?: string;
  "aria-label"?: string;
  "aria-labelledby"?: string;
  "aria-describedby"?: string;
};

export type DatePickerSingleProps = DatePickerBaseProps & {
  mode?: "single";
  value?: Date | undefined;
  defaultValue?: Date;
  onValueChange?: (value: Date | undefined) => void;
  presets?: DatePreset<Date>[];
  numberOfMonths?: 1 | 2;
};

export type DatePickerRangeProps = DatePickerBaseProps & {
  mode: "range";
  value?: DateRange | undefined;
  defaultValue?: DateRange;
  onValueChange?: (value: DateRange | undefined) => void;
  presets?: DatePreset<DateRange>[];
  numberOfMonths?: 1 | 2;
};

export type DatePickerProps = DatePickerSingleProps | DatePickerRangeProps;

const DEFAULT_FORMAT: Intl.DateTimeFormatOptions = {
  month: "short",
  day: "numeric",
  year: "numeric",
};

function toIso(date: Date) {
  const m = String(date.getMonth() + 1).padStart(2, "0");
  const d = String(date.getDate()).padStart(2, "0");
  return `${date.getFullYear()}-${m}-${d}`;
}

function CalendarIcon() {
  return (
    <svg
      viewBox="0 0 16 16"
      fill="none"
      stroke="currentColor"
      strokeWidth={1.5}
      strokeLinecap="round"
      strokeLinejoin="round"
      aria-hidden
      className="size-4"
    >
      <rect x="2.5" y="3.5" width="11" height="10" rx="2" />
      <path d="M2.5 6.75h11M5.5 2v2.5M10.5 2v2.5" />
    </svg>
  );
}

function XIcon() {
  return (
    <svg
      viewBox="0 0 16 16"
      fill="none"
      stroke="currentColor"
      strokeWidth={1.5}
      strokeLinecap="round"
      aria-hidden
      className="size-3.5"
    >
      <path d="m4.5 4.5 7 7m0-7-7 7" />
    </svg>
  );
}

export function DatePicker(props: DatePickerProps) {
  const {
    mode = "single",
    placeholder = mode === "range" ? "Pick a date range" : "Pick a date",
    min,
    max,
    disabledDates,
    disabled = false,
    invalid = false,
    clearable = true,
    today,
    locale = "en-US",
    weekStartsOn,
    formatOptions = DEFAULT_FORMAT,
    open: openProp,
    defaultOpen = false,
    onOpenChange,
    id,
    name,
    className,
  } = props;
  const range = mode === "range";
  // The trigger's name is its label plus the visible value (label in name).
  const autoId = React.useId();
  const triggerId = id ?? `${autoId}-trigger`;
  const valueId = `${autoId}-value`;
  const labelledBy = props["aria-labelledby"]
    ? `${props["aria-labelledby"]} ${valueId}`
    : props["aria-label"]
      ? `${triggerId} ${valueId}`
      : undefined;
  const numberOfMonths = props.numberOfMonths ?? (range ? 2 : 1);

  /* ----- value ----- */
  const controlled = Object.prototype.hasOwnProperty.call(props, "value");
  const [internal, setInternal] = React.useState<Date | DateRange | undefined>(props.defaultValue);
  const value = controlled ? props.value : internal;
  const single = !range ? (value as Date | undefined) : undefined;
  const rangeValue = range ? (value as DateRange | undefined) : undefined;
  const hasValue = range ? !!rangeValue?.from : !!single;

  const commit = (next: Date | DateRange | undefined) => {
    setInternal(next);
    if (range) (props.onValueChange as DatePickerRangeProps["onValueChange"])?.(next as DateRange);
    else (props.onValueChange as DatePickerSingleProps["onValueChange"])?.(next as Date);
  };

  /* ----- open ----- */
  const [openState, setOpenState] = React.useState(defaultOpen);
  const open = (openProp ?? openState) && !disabled;
  const setOpen = (next: boolean) => {
    setOpenState(next);
    onOpenChange?.(next);
  };

  /* ----- text ----- */
  const fmt = new Intl.DateTimeFormat(locale, formatOptions);
  // Built by hand rather than with formatRange: its separator spacing differs
  // between ICU builds, which would break hydration.
  let text = "";
  if (single) text = fmt.format(single);
  else if (rangeValue?.from) {
    const { from, to } = rangeValue;
    if (!to) text = `${fmt.format(from)} – …`;
    else {
      const sameYear = from.getFullYear() === to.getFullYear() && !!formatOptions.year;
      const fromFmt = sameYear
        ? new Intl.DateTimeFormat(locale, { ...formatOptions, year: undefined })
        : fmt;
      text = `${fromFmt.format(from)} – ${fmt.format(to)}`;
    }
  }

  const presets = props.presets as DatePreset<Date | DateRange>[] | undefined;
  const presetMatches = (p: DatePreset<Date | DateRange>) => {
    if (!range) return isSameDay(p.value as Date, single);
    const r = p.value as DateRange;
    return !!rangeValue && isSameDay(r.from, rangeValue.from) && isSameDay(r.to, rangeValue.to);
  };

  const calendarCommon = {
    min,
    max,
    disabled: disabledDates,
    today,
    locale,
    weekStartsOn,
    numberOfMonths,
    autoFocus: true,
  } as const;

  return (
    <Popover open={open} onOpenChange={setOpen}>
      <div data-slot="date-picker" className={cn("group/date-picker relative w-full", className)}>
        <PopoverTrigger asChild>
          <button
            type="button"
            id={triggerId}
            disabled={disabled}
            aria-haspopup="dialog"
            data-invalid={invalid || undefined}
            aria-label={props["aria-label"]}
            aria-labelledby={labelledBy}
            aria-describedby={props["aria-describedby"]}
            data-empty={!hasValue || undefined}
            className={cn(
              "flex h-9 w-full cursor-pointer items-center gap-2 rounded-md border border-border-control bg-card ps-3 text-start text-sm text-foreground inset-shadow-xs",
              clearable && hasValue ? "pe-9" : "pe-3",
              "transition-[border-color,box-shadow,background-color] duration-(--motion-fast) ease-enter motion-reduce:transition-none",
              "hover:border-muted-foreground data-[state=open]:border-muted-foreground",
              "focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background focus-visible:outline-none",
              "data-invalid:border-danger data-invalid:ring-[3px] data-invalid:ring-danger/20 data-invalid:focus-visible:ring-2 data-invalid:focus-visible:ring-danger/40",
              "disabled:pointer-events-none disabled:cursor-not-allowed disabled:bg-muted disabled:opacity-50 disabled:inset-shadow-none",
            )}
          >
            <span className="text-muted-foreground transition-colors duration-(--motion-fast) group-focus-within/date-picker:text-foreground">
              <CalendarIcon />
            </span>
            <span
              id={valueId}
              data-slot="date-picker-value"
              className={cn(
                "min-w-0 flex-1 truncate tabular-nums",
                !hasValue && "text-muted-foreground",
              )}
            >
              {text || placeholder}
            </span>
          </button>
        </PopoverTrigger>
        {clearable && hasValue && !disabled && (
          <button
            type="button"
            data-slot="date-picker-clear"
            aria-label="Clear date"
            onClick={() => commit(undefined)}
            className={cn(
              "absolute inset-y-0 end-1 my-auto grid size-7 cursor-pointer place-items-center rounded-md text-muted-foreground",
              "transition-[background-color,color,scale,opacity] duration-(--motion-fast) ease-enter hover:bg-muted hover:text-foreground motion-reduce:transition-none",
              "focus-visible:ring-2 focus-visible:ring-ring focus-visible:outline-none",
              "active:scale-90 starting:scale-75 starting:opacity-0",
            )}
          >
            <XIcon />
          </button>
        )}
        {name && single && <input type="hidden" name={name} value={toIso(single)} />}
        {name && rangeValue?.from && (
          <>
            <input type="hidden" name={`${name}From`} value={toIso(rangeValue.from)} />
            {rangeValue.to && (
              <input type="hidden" name={`${name}To`} value={toIso(rangeValue.to)} />
            )}
          </>
        )}
      </div>

      <PopoverContent align="start" className="flex w-auto max-w-[calc(100vw-1rem)] gap-0 p-0">
        {presets && presets.length > 0 && (
          <div
            role="group"
            aria-label="Presets"
            data-slot="date-picker-presets"
            className="flex w-36 shrink-0 flex-col gap-0.5 border-e border-border bg-muted/40 p-2 max-sm:hidden"
          >
            <span className="px-2 pt-1 pb-1.5 text-[11px] font-medium tracking-wide text-muted-foreground uppercase">
              Quick pick
            </span>
            {presets.map((p) => {
              const active = presetMatches(p);
              return (
                <button
                  key={p.label}
                  type="button"
                  aria-pressed={active}
                  onClick={() => {
                    commit(p.value);
                    setOpen(false);
                  }}
                  className={cn(
                    "flex h-8 cursor-pointer items-center justify-between gap-2 rounded-md px-2 text-start text-[13px] text-foreground",
                    "transition-[background-color,box-shadow] duration-(--motion-fast) ease-enter motion-reduce:transition-none",
                    "hover:bg-card hover:shadow-raised-xs hover:ring-1 hover:ring-hairline",
                    "focus-visible:ring-2 focus-visible:ring-ring focus-visible:outline-none",
                    active &&
                      "bg-card font-medium shadow-raised-xs ring-1 inset-shadow-highlight ring-hairline",
                  )}
                >
                  {p.label}
                  {active && <span aria-hidden className="size-1.5 rounded-full bg-accent" />}
                </button>
              );
            })}
          </div>
        )}
        <div className="p-3">
          {range ? (
            <Calendar
              {...calendarCommon}
              mode="range"
              defaultMonth={rangeValue?.from}
              selected={rangeValue}
              onSelect={(r) => {
                commit(r);
                if (r?.from && r.to) setOpen(false);
              }}
            />
          ) : (
            <Calendar
              {...calendarCommon}
              mode="single"
              defaultMonth={single}
              selected={single}
              onSelect={(d) => {
                commit(d);
                if (d) setOpen(false);
              }}
            />
          )}
        </div>
      </PopoverContent>
    </Popover>
  );
}