'use client';

import { Listbox, ListboxButton, ListboxOption, ListboxOptions } from '@headlessui/react';
import type { IconSize, SortBy, SortDirection, ViewMode } from '@/types/documents';
import {
  IconsViewIcon,
  ListViewIcon,
  ColumnsViewIcon,
  GalleryViewIcon,
  SearchIcon,
  FolderPlusIcon,
  HamburgerIcon,
} from './finderIcons';
import { ChevronUpDownIcon } from '@/components/icons/Icons';
import type { ReactNode } from 'react';

interface FinderToolbarProps {
  viewMode: ViewMode;
  onViewModeChange: (mode: ViewMode) => void;
  iconSize: IconSize;
  onIconSizeChange: (size: IconSize) => void;
  sortBy: SortBy;
  sortDirection: SortDirection;
  onSortByChange: (s: SortBy) => void;
  onSortDirectionToggle: () => void;
  query: string;
  onQueryChange: (q: string) => void;
  onNewFolder: () => void;
  onToggleSidebar: () => void;
  /** True when the columns view should be disabled (mobile viewport). */
  isNarrow: boolean;
  /** App-level content rendered at the far left (brand/logo). */
  leftSlot?: ReactNode;
  /** App-level content rendered at the far right (settings, user menu). */
  rightSlot?: ReactNode;
}

const VIEW_BUTTONS: Array<{ value: ViewMode; label: string; Icon: typeof IconsViewIcon }> = [
  { value: 'icons', label: 'Icons', Icon: IconsViewIcon },
  { value: 'list', label: 'List', Icon: ListViewIcon },
  { value: 'columns', label: 'Columns', Icon: ColumnsViewIcon },
  { value: 'gallery', label: 'Gallery', Icon: GalleryViewIcon },
];

const SORT_OPTIONS: Array<{ value: SortBy; label: string; asc: string; desc: string }> = [
  { value: 'name', label: 'Name', asc: 'A → Z', desc: 'Z → A' },
  { value: 'type', label: 'Kind', asc: 'A → Z', desc: 'Z → A' },
  { value: 'date', label: 'Modified', asc: 'Oldest', desc: 'Newest' },
  { value: 'size', label: 'Size', asc: 'Smallest', desc: 'Largest' },
];

const ICON_SIZES: Array<{ value: IconSize; label: string }> = [
  { value: 'sm', label: 'S' },
  { value: 'md', label: 'M' },
  { value: 'lg', label: 'L' },
  { value: 'xl', label: 'XL' },
];

// Match SettingsModal / UserMenu trigger sizing exactly so all bar buttons share one rhythm.
const TOOLBAR_BTN =
  'inline-flex items-center py-1 px-2 rounded-md border bg-base text-xs transition-all duration-200 ease-out hover:scale-[1.01]';
const TOOLBAR_BTN_INACTIVE =
  'border-offbase text-foreground hover:text-accent hover:border-accent hover:bg-offbase';

// Pill-grouped segmented control. Outer pill carries the border; inner segments are
// borderless and rely on bg/text color to show active/hover. Sized so the whole pill
// matches the height of a standalone TOOLBAR_BTN.
const PILL = 'inline-flex items-center rounded-md border border-offbase bg-base p-0.5 gap-0.5 shrink-0';
const PILL_SEGMENT =
  'inline-flex items-center justify-center rounded-[5px] text-xs transition-colors duration-200 ease-out';
const PILL_SEGMENT_INACTIVE = 'text-muted hover:bg-offbase hover:text-accent';
const PILL_SEGMENT_ACTIVE = 'bg-offbase text-accent';

export function FinderToolbar({
  viewMode,
  onViewModeChange,
  iconSize,
  onIconSizeChange,
  sortBy,
  sortDirection,
  onSortByChange,
  onSortDirectionToggle,
  query,
  onQueryChange,
  onNewFolder,
  onToggleSidebar,
  isNarrow,
  leftSlot,
  rightSlot,
}: FinderToolbarProps) {
  const currentSort = SORT_OPTIONS.find((o) => o.value === sortBy) ?? SORT_OPTIONS[0];
  const directionLabel = sortDirection === 'asc' ? currentSort.asc : currentSort.desc;

  return (
    <div className="min-h-10 px-2 sm:px-3 py-1 flex items-center gap-1.5 sm:gap-2 bg-base border-b border-offbase">
      {leftSlot && (
        <div className="shrink-0 flex items-center gap-2 pr-1 sm:pr-2 sm:border-r sm:border-offbase">
          {leftSlot}
        </div>
      )}

      <button
        type="button"
        onClick={onToggleSidebar}
        className={`${TOOLBAR_BTN} ${TOOLBAR_BTN_INACTIVE} shrink-0`}
        aria-label="Toggle sidebar"
        title="Toggle sidebar"
      >
        <HamburgerIcon className="w-4 h-4" />
      </button>

      <div className={PILL}>
        {VIEW_BUTTONS.map(({ value, label, Icon }) => {
          const disabled = value === 'columns' && isNarrow;
          const active = viewMode === value;
          return (
            <button
              key={value}
              type="button"
              disabled={disabled}
              onClick={() => onViewModeChange(value)}
              aria-pressed={active}
              aria-label={`${label} view`}
              title={disabled ? `${label} (desktop only)` : `${label} view`}
              className={
                PILL_SEGMENT +
                ' h-6 w-7 ' +
                (active ? PILL_SEGMENT_ACTIVE : PILL_SEGMENT_INACTIVE) +
                (disabled ? ' opacity-40 cursor-not-allowed hover:bg-transparent hover:text-muted' : '')
              }
            >
              <Icon className="w-4 h-4" />
            </button>
          );
        })}
      </div>

      {viewMode === 'icons' && (
        <div className={`${PILL} hidden sm:inline-flex`}>
          {ICON_SIZES.map(({ value, label }) => {
            const active = iconSize === value;
            return (
              <button
                key={value}
                type="button"
                onClick={() => onIconSizeChange(value)}
                aria-pressed={active}
                aria-label={`Icon size ${label}`}
                className={
                  PILL_SEGMENT +
                  ' h-6 min-w-[26px] px-1.5 font-semibold tracking-wide ' +
                  (active ? PILL_SEGMENT_ACTIVE : PILL_SEGMENT_INACTIVE)
                }
              >
                {label}
              </button>
            );
          })}
        </div>
      )}

      <div className="flex items-center gap-1 shrink-0">
        <button
          type="button"
          onClick={onSortDirectionToggle}
          className={`${TOOLBAR_BTN} ${TOOLBAR_BTN_INACTIVE} whitespace-nowrap`}
          title="Toggle sort direction"
        >
          {directionLabel}
        </button>
        <Listbox value={sortBy} onChange={onSortByChange}>
          <ListboxButton
            className={`${TOOLBAR_BTN} ${TOOLBAR_BTN_INACTIVE} gap-1 min-w-[90px] justify-between`}
          >
            <span>{currentSort.label}</span>
            <ChevronUpDownIcon className="h-3 w-3 opacity-60" />
          </ListboxButton>
          <ListboxOptions
            anchor="bottom end"
            className="z-50 mt-1 rounded-md bg-background border border-offbase shadow-lg p-1 focus:outline-none"
          >
            {SORT_OPTIONS.map((opt) => (
              <ListboxOption
                key={opt.value}
                value={opt.value}
                className={({ active, selected }) =>
                  `cursor-pointer select-none rounded-sm py-1.5 px-2.5 text-xs ${
                    active ? 'bg-offbase text-accent' : 'text-foreground'
                  } ${selected ? 'font-semibold' : ''}`
                }
              >
                {opt.label}
              </ListboxOption>
            ))}
          </ListboxOptions>
        </Listbox>
      </div>

      <div className="flex-1 min-w-0" />

      <div className="hidden sm:flex items-center gap-1.5 px-2 py-1 rounded-md bg-background border border-offbase hover:border-accent focus-within:ring-1 focus-within:ring-accent focus-within:border-accent transition-colors duration-200 ease-out w-[160px] md:w-[200px]">
        <SearchIcon className="w-3.5 h-3.5 text-muted shrink-0" />
        <input
          type="search"
          value={query}
          onChange={(e) => onQueryChange(e.target.value)}
          placeholder="Search"
          className="flex-1 min-w-0 bg-transparent outline-none text-xs text-foreground placeholder:text-muted"
        />
      </div>

      <button
        type="button"
        onClick={onNewFolder}
        className={`${TOOLBAR_BTN} ${TOOLBAR_BTN_INACTIVE} gap-1 shrink-0`}
        title="New folder"
      >
        <FolderPlusIcon className="w-4 h-4" />
        <span className="hidden md:inline">New Folder</span>
      </button>

      {rightSlot && (
        <div className="shrink-0 flex items-center gap-2 pl-1 sm:pl-2 sm:border-l sm:border-offbase ml-0.5">
          {rightSlot}
        </div>
      )}
    </div>
  );
}