"use client";

import { useEffect, useMemo, useState } from "react";
import { Crosshair, Layers, Package, Palette, SearchIcon } from "lucide-react";
import type { Asset, Loadout } from "@/payload-types";
import { Button } from "@/components/ui/button";
import {
  CommandDialog,
  CommandEmpty,
  CommandGroup,
  CommandInput,
  CommandItem,
  CommandList,
} from "@/components/ui/command";
import { getAssetTypeLabel, type LockerGridItem } from "@/lib/locker";
import {
  buildSearchEntries,
  type LockerSearchEntry,
  type LockerSearchLocationKind,
} from "@/lib/locker/search";
import { getAssetIcon } from "./LockerGrid";

function locationIcon(kind: LockerSearchLocationKind) {
  switch (kind) {
    case "locker":
      return <Package className="size-3 text-muted-foreground" />;
    case "attached":
      return <Crosshair className="size-3 text-muted-foreground" />;
    case "skin":
      return <Palette className="size-3 text-muted-foreground" />;
    case "loadout":
      return <Layers className="size-3 text-muted-foreground" />;
  }
}

function entrySearchText(entry: LockerSearchEntry): string {
  return [
    entry.displayName,
    entry.asset.name,
    getAssetTypeLabel(entry.assetType),
    ...entry.locations.map((l) => l.text),
  ]
    .join(" ")
    .toLowerCase();
}

interface LockerSearchProps {
  items: LockerGridItem[];
  loadouts: Loadout[];
  onSelect: (entry: LockerSearchEntry) => void;
}

export function LockerSearch({ items, loadouts, onSelect }: LockerSearchProps) {
  const [open, setOpen] = useState(false);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "k") {
        e.preventDefault();
        setOpen((v) => !v);
      }
    };
    window.addEventListener("keydown", onKey);
    return () => window.removeEventListener("keydown", onKey);
  }, []);

  const entries = useMemo(() => buildSearchEntries(items, loadouts), [items, loadouts]);

  const groups = useMemo(() => {
    const byType = new Map<Asset["assetType"], LockerSearchEntry[]>();
    for (const entry of entries) {
      const list = byType.get(entry.assetType) ?? [];
      list.push(entry);
      byType.set(entry.assetType, list);
    }
    return [...byType.entries()].sort((a, b) =>
      getAssetTypeLabel(a[0]).localeCompare(getAssetTypeLabel(b[0])),
    );
  }, [entries]);

  return (
    <>
      <Button variant="outline" size="sm" onClick={() => setOpen(true)}>
        <SearchIcon className="size-3.5" />
        Search
        <kbd className="ml-1 inline-flex h-4 items-center gap-0.5 rounded border border-border bg-muted px-1 text-[10px] font-medium text-muted-foreground">
          ⌘K
        </kbd>
      </Button>

      <CommandDialog open={open} onOpenChange={setOpen} title="Search Locker">
        <CommandInput placeholder="Search your locker, attachments, skins, and loadouts..." />
        <CommandList>
          <CommandEmpty>No items found.</CommandEmpty>
          {groups.map(([assetType, typeEntries]) => (
            <CommandGroup key={assetType} heading={getAssetTypeLabel(assetType)}>
              {typeEntries.map((entry) => (
                <CommandItem
                  key={entry.key}
                  value={entrySearchText(entry)}
                  onSelect={() => {
                    setOpen(false);
                    onSelect(entry);
                  }}
                  className="items-start py-2.5"
                >
                  <span className="mt-0.5 text-amber-400">
                    {getAssetIcon(entry.assetType, "size-4")}
                  </span>
                  <div className="flex-1 min-w-0">
                    <div className="flex items-center gap-2">
                      <span className="font-medium truncate">{entry.displayName}</span>
                      {entry.quantity > 0 && (
                        <span className="text-xs text-muted-foreground shrink-0">
                          {entry.quantity.toLocaleString()}×
                        </span>
                      )}
                    </div>
                    {entry.stats.length > 0 && (
                      <div className="text-xs text-muted-foreground truncate">
                        {entry.stats.map((s) => `${s.label}: ${s.value}`).join(" · ")}
                      </div>
                    )}
                    {entry.locations.length > 0 && (
                      <div className="mt-0.5 flex flex-wrap items-center gap-x-2 gap-y-0.5">
                        {entry.locations.map((loc) => (
                          <span
                            key={loc.text}
                            className="inline-flex items-center gap-1 text-xs text-muted-foreground/80"
                          >
                            {locationIcon(loc.kind)}
                            {loc.text}
                          </span>
                        ))}
                      </div>
                    )}
                  </div>
                </CommandItem>
              ))}
            </CommandGroup>
          ))}
        </CommandList>
      </CommandDialog>
    </>
  );
}