import { useState, type ReactNode } from "react";
import { ArrowDown, ArrowUp, Check, ChevronDown } from "lucide-react";
import { pickSort, type SortOption, type SortState } from "../lib/columnSort";
import { PopoverItem, PopoverSurface, useAnchoredPopover } from "./AnchoredPopover";

// The one sort control for every content surface (YT feed, Plex library, channel manager + its card
// view, channel discovery, playlists): a labeled dropdown pill matching FilterSelect — `Label: key ↓ ▾`
// — that opens a listbox of `SortOption`s with an asc/desc segment in the panel footer. Two-dimensional
// (key + direction) unlike FilterSelect, so it stays its own component. Driven by the shared `SortState`.
// `defaultLabel` opts a view into a "no sort" choice (tables); omit it for always-sorted views
// (feed/Plex). `trailing` is an adornment slot (the feed's reshuffle, playlists' dirty-first toggle)
// rendered in the footer beside the direction segment.
//
// Direction lives in the footer, not on the trigger, on purpose: the trigger stays a single plain
// <button> (the popover reference) with no nested button — picking a key keeps the panel open so key
// AND direction can be set in one visit; picking "no sort" closes it (nothing left to direct).
export default function SortControl({
  options,
  sort,
  onChange,
  label,
  ascLabel,
  descLabel,
  defaultLabel,
  trailing,
}: {
  options: SortOption[];
  sort: SortState;
  onChange: (next: SortState) => void;
  /** Accessible name + visible prefix for the trigger (e.g. "Sort"). */
  label: string;
  ascLabel: string;
  descLabel: string;
  /** When set, a leading "no sort / original order" option is offered (tables). Omit for
   * always-sorted views (feed/Plex), which never surface a null sort. */
  defaultLabel?: string;
  /** Rendered in the panel footer beside the direction segment (feed reshuffle, playlists dirty-first). */
  trailing?: ReactNode;
}) {
  const [open, setOpen] = useState(false);
  const pop = useAnchoredPopover({
    open,
    onOpenChange: setOpen,
    mode: "menu",
    placement: "bottom-end",
  });

  // A stored sort can name an option this surface no longer offers; show it as unsorted rather than
  // letting an arrow claim a sort that `sortRows`/the server won't actually apply.
  const active = sort && options.some((o) => o.key === sort.key) ? sort : null;
  const activeOpt = active ? options.find((o) => o.key === active.key) : undefined;
  const showArrow = !!activeOpt && !activeOpt.directionless;
  // Trigger summary: the active option's label, or the "no sort" text, or (a stale/out-of-scope sort on
  // an always-sorted view) the first option's label rather than a blank pill.
  const summary = activeOpt?.label ?? defaultLabel ?? options[0]?.label ?? "";

  const segCls = (on: boolean) =>
    `flex flex-1 items-center justify-center gap-1 whitespace-nowrap rounded-md border px-2 py-1 text-2xs transition ${
      on
        ? "border-accent bg-accent/15 text-accent"
        : "border-border text-muted hover:border-accent/50 hover:text-fg"
    }`;

  return (
    <>
      <button
        type="button"
        ref={pop.refs.setReference}
        {...pop.getReferenceProps()}
        // Carry the active sort key AND direction in the accessible name (the visible arrow is
        // aria-hidden), matching ViewSwitcher — a screen reader announces "Sort: Date, Descending",
        // not a bare "Sort".
        aria-label={`${label}: ${summary}${
          showArrow && active ? `, ${active.dir === "asc" ? ascLabel : descLabel}` : ""
        }`}
        className={`glass-card glass-hover inline-flex items-center gap-1.5 rounded-full border px-3 py-1 text-sm transition ${
          open ? "border-accent" : "border-border"
        }`}
      >
        <span className="text-muted">{label}:</span>
        <span className="text-fg">{summary}</span>
        {showArrow &&
          active &&
          (active.dir === "asc" ? (
            <ArrowUp className="h-3.5 w-3.5 shrink-0 text-muted" aria-hidden="true" />
          ) : (
            <ArrowDown className="h-3.5 w-3.5 shrink-0 text-muted" aria-hidden="true" />
          ))}
        <ChevronDown className="h-3.5 w-3.5 shrink-0 text-muted" aria-hidden="true" />
      </button>

      <PopoverSurface
        popover={pop}
        ariaLabel={label}
        className="glass-menu min-w-56 rounded-xl p-1.5 shadow-lg animate-[popIn_0.16s_ease]"
      >
        {/* One exclusive choice of sort key (radios), scoped by a group so AT announces which is
            checked — the surface is a menu (see the mode above), never a listbox with orphaned options. */}
        <div role="group" aria-label={label}>
          {defaultLabel !== undefined && (
            <PopoverItem
              role="menuitemradio"
              checked={active === null}
              onSelect={() => {
                onChange(null);
                setOpen(false); // "no sort" is a final choice — nothing left to direct
              }}
              label={defaultLabel}
              className={`flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm transition ${
                active === null ? "text-fg" : "text-muted"
              }`}
            >
              <Check
                className={`h-3.5 w-3.5 shrink-0 ${active === null ? "text-accent" : "opacity-0"}`}
              />
              <span className="flex-1 truncate">{defaultLabel}</span>
            </PopoverItem>
          )}
          {options.map((o) => {
            const on = active?.key === o.key;
            return (
              <PopoverItem
                key={o.key}
                role="menuitemradio"
                checked={on}
                onSelect={() => onChange(pickSort(options, active, o.key))} // keep open to set direction
                label={o.label}
                className={`flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm transition ${
                  on ? "text-fg" : "text-muted"
                }`}
              >
                <Check className={`h-3.5 w-3.5 shrink-0 ${on ? "text-accent" : "opacity-0"}`} />
                <span className="flex-1 truncate">{o.label}</span>
              </PopoverItem>
            );
          })}
        </div>
        {((showArrow && active) || trailing) && (
          <div
            role="group"
            aria-label={label}
            className="mt-1 flex items-center gap-1.5 border-t border-border px-1 pt-2"
          >
            {showArrow && active && (
              <div className="flex flex-1 gap-1">
                <button
                  type="button"
                  aria-pressed={active.dir === "asc"}
                  onClick={() => onChange({ key: active.key, dir: "asc" })}
                  className={segCls(active.dir === "asc")}
                >
                  <ArrowUp className="h-3 w-3" aria-hidden="true" />
                  {ascLabel}
                </button>
                <button
                  type="button"
                  aria-pressed={active.dir === "desc"}
                  onClick={() => onChange({ key: active.key, dir: "desc" })}
                  className={segCls(active.dir === "desc")}
                >
                  <ArrowDown className="h-3 w-3" aria-hidden="true" />
                  {descLabel}
                </button>
              </div>
            )}
            {trailing}
          </div>
        )}
      </PopoverSurface>
    </>
  );
}