"use client";

import Image from "next/image";
import { SearchIcon, Trash2Icon } from "lucide-react";
import { useMemo, useState, useTransition } from "react";
import { useRouter } from "next/navigation";
import { toast } from "sonner";

import { addGlossaryAlias, removeGlossaryAlias } from "@/app/admin/actions";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Combobox, ComboboxContent, ComboboxEmpty, ComboboxInput, ComboboxItem, ComboboxList } from "@/components/ui/combobox";
import { Field, FieldGroup, FieldLabel } from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import { Select, SelectContent, SelectGroup, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Spinner } from "@/components/ui/spinner";
import type { GlossaryKind } from "@/lib/glossary";
import { rarityGradientClass } from "@/lib/catalog/rarity";
import { cn } from "@/lib/utils";

type CatalogItem = { key: string; name: string; imageUrl: string; rarity?: number | null };
type Alias = { id: string; kind: string; catalogKey: string; alias: string };

const kindLabels: Record<GlossaryKind, string> = {
  character: "Character",
  weapon: "Weapon",
  artifact: "Artifact",
};

export function GlossaryManager({
  aliases,
  catalogs,
}: {
  aliases: Alias[];
  catalogs: Record<GlossaryKind, CatalogItem[]>;
}) {
  const router = useRouter();
  const [pending, startTransition] = useTransition();
  const [kind, setKind] = useState<GlossaryKind>("character");
  const [item, setItem] = useState<CatalogItem | null>(null);
  const [alias, setAlias] = useState("");
  const [query, setQuery] = useState("");
  const itemNames = useMemo(() => new Map(
    Object.entries(catalogs).flatMap(([catalogKind, items]) =>
      items.map((catalogItem) => [`${catalogKind}:${catalogItem.key}`, catalogItem.name] as const),
    ),
  ), [catalogs]);
  const visibleAliases = aliases.filter((entry) =>
    `${entry.alias} ${itemNames.get(`${entry.kind}:${entry.catalogKey}`) ?? entry.catalogKey}`
      .toLocaleLowerCase("th")
      .includes(query.trim().toLocaleLowerCase("th")),
  );

  const submit = () => startTransition(async () => {
    const result = await addGlossaryAlias({ kind, catalogKey: item?.key, alias });
    if (result.status === "error") {
      toast.error(result.message);
      return;
    }
    setAlias("");
    toast.success("เพิ่ม Shortcut แล้ว");
    router.refresh();
  });

  return (
    <div className="flex flex-col gap-6">
      <Card>
        <CardHeader>
          <CardTitle>เพิ่ม Shortcut</CardTitle>
          <CardDescription>ผูกคำค้นแบบย่อกับรายการจาก Catalog</CardDescription>
        </CardHeader>
        <CardContent>
          <FieldGroup>
            <Field>
              <FieldLabel>ประเภท</FieldLabel>
              <Select value={kind} onValueChange={(value) => {
                setKind(value as GlossaryKind);
                setItem(null);
              }}>
                <SelectTrigger><SelectValue /></SelectTrigger>
                <SelectContent>
                  <SelectGroup>
                    {(Object.keys(kindLabels) as GlossaryKind[]).map((value) => (
                      <SelectItem key={value} value={value}>{kindLabels[value]}</SelectItem>
                    ))}
                  </SelectGroup>
                </SelectContent>
              </Select>
            </Field>
            <Field>
              <FieldLabel>รายการ</FieldLabel>
              <Combobox
                items={catalogs[kind]}
                value={item}
                onValueChange={setItem}
                itemToStringLabel={(value) => value.name}
                itemToStringValue={(value) => value.name}
              >
                <ComboboxInput placeholder="ค้นหารายการ…" showClear />
                <ComboboxContent>
                  <ComboboxEmpty>ไม่พบรายการ</ComboboxEmpty>
                  <ComboboxList>
                    {(catalogItem) => (
                      <ComboboxItem key={catalogItem.key} value={catalogItem}>
                        <span className={cn(
                          "relative size-8 shrink-0 overflow-hidden rounded-md bg-muted",
                          rarityGradientClass(catalogItem.rarity),
                        )}>
                          <Image src={catalogItem.imageUrl} alt="" fill className="object-contain" />
                        </span>
                        {catalogItem.name}
                      </ComboboxItem>
                    )}
                  </ComboboxList>
                </ComboboxContent>
              </Combobox>
            </Field>
            <Field>
              <FieldLabel htmlFor="glossary-alias">Shortcut</FieldLabel>
              <Input id="glossary-alias" value={alias} maxLength={120} onChange={(event) => setAlias(event.target.value)} onKeyDown={(event) => {
                if (event.key === "Enter" && item && alias.trim()) submit();
              }} />
            </Field>
            <Button disabled={pending || !item || !alias.trim()} onClick={submit}>
              {pending ? <Spinner data-icon="inline-start" /> : null}
              เพิ่ม Shortcut
            </Button>
          </FieldGroup>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>Glossary</CardTitle>
          <CardDescription>{aliases.length} shortcuts</CardDescription>
        </CardHeader>
        <CardContent className="flex flex-col gap-3">
          <Field>
            <FieldLabel htmlFor="glossary-search">ค้นหา</FieldLabel>
            <div className="relative">
              <SearchIcon className="pointer-events-none absolute top-1/2 left-3 size-4 -translate-y-1/2 text-muted-foreground" />
              <Input id="glossary-search" className="pl-9" value={query} onChange={(event) => setQuery(event.target.value)} />
            </div>
          </Field>
          {visibleAliases.map((entry) => {
            const name = itemNames.get(`${entry.kind}:${entry.catalogKey}`);
            return (
              <div key={entry.id} className="flex items-center gap-3 rounded-lg border p-3">
                <div className="min-w-0 flex-1">
                  <p className="font-medium">{entry.alias}</p>
                  <p className="truncate text-sm text-muted-foreground">{name ?? entry.catalogKey}</p>
                </div>
                <Badge variant={name ? "secondary" : "outline"}>{name ? kindLabels[entry.kind as GlossaryKind] : "Unavailable"}</Badge>
                <Button variant="ghost" size="icon-sm" disabled={pending} aria-label={`ลบ ${entry.alias}`} onClick={() => startTransition(async () => {
                  const result = await removeGlossaryAlias(entry.id);
                  if (result.status === "error") toast.error(result.message);
                  else {
                    toast.success("ลบ Shortcut แล้ว");
                    router.refresh();
                  }
                })}><Trash2Icon /></Button>
              </div>
            );
          })}
        </CardContent>
      </Card>
    </div>
  );
}