"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import type { Asset, Loadout } from "@/payload-types";
import { Button } from "@/components/ui/button";
import { Combobox } from "@/components/ui/combobox";
import { Item, ItemContent, ItemHeader, ItemTitle } from "@/components/ui/item";
import { Wardrobe } from "./Wardrobe";
import { WardrobeSlotPicker } from "./WardrobeSlotPicker";
import {
  getAssetTypeLabel,
  getLoadoutSlot,
  getWardrobeSlot,
  type LoadoutSlots,
  type LockerGridItem,
  WARDROBE_SLOT_LAYOUT,
} from "@/lib/locker";
import { equipLoadout, setLoadoutSlot } from "@/app/(frontend)/locker/actions";
import { getAssetIcon } from "./LockerGrid";

interface WardrobePanelProps {
  userName: string;
  loadouts: Loadout[];
  equippedLoadout: Loadout | null;
  items: LockerGridItem[];
}

function resolveSlotAsset(
  value: LoadoutSlots[keyof LoadoutSlots],
  items: LockerGridItem[],
): Asset | null {
  if (value == null) return null;
  if (typeof value === "object" && "id" in value) return value as Asset;
  const id = value as number;
  return items.find((i) => i.assetId === id)?.asset ?? null;
}

function resolveSlotDisplayName(asset: Asset, items: LockerGridItem[]): string {
  const custom = items.find((i) => i.assetId === asset.id)?.equipment?.customName?.trim();
  return custom || asset.name;
}

export function WardrobePanel({ userName, loadouts, equippedLoadout, items }: WardrobePanelProps) {
  const router = useRouter();
  const [pickerSlot, setPickerSlot] = useState<string | null>(null);
  const [busy, setBusy] = useState(false);

  const slots = (equippedLoadout?.slots ?? {}) as LoadoutSlots;

  async function handleEquip(loadoutId: number) {
    setBusy(true);
    const res = await equipLoadout(loadoutId);
    setBusy(false);
    if (res.success) router.refresh();
  }

  async function handlePick(slotName: string, assetId: number | null) {
    if (!equippedLoadout) return { success: false, error: "No loadout equipped." };
    setBusy(true);
    const res = await setLoadoutSlot(equippedLoadout.id, slotName, assetId);
    setBusy(false);
    if (res.success) {
      setPickerSlot(null);
      router.refresh();
    }
    return res;
  }

  const pickerLayout = pickerSlot ? getWardrobeSlot(pickerSlot) : null;
  const pickerConfig = pickerSlot ? getLoadoutSlot(pickerSlot) : null;
  const pickerValue = pickerSlot ? (slots[pickerSlot as keyof LoadoutSlots] ?? null) : null;

  const filled = equippedLoadout
    ? WARDROBE_SLOT_LAYOUT.filter((layout) => slots[layout.name] != null)
    : [];

  return (
    <div className="grid grid-cols-1 gap-6 lg:grid-cols-[minmax(0,40rem)_minmax(0,1fr)]">
      <Item variant="outline" className="self-start">
        <ItemHeader>
          <ItemTitle>Character</ItemTitle>
        </ItemHeader>
        <ItemContent>
          <Wardrobe
            loadout={equippedLoadout ?? ({ name: "Empty", slots: {} } as unknown as Loadout)}
            items={items}
            onSlotClick={(name) => setPickerSlot(name)}
          />
          <p className="mt-3 text-center text-sm text-muted-foreground">
            {equippedLoadout
              ? "Select a slot block to equip gear from your locker."
              : "Equip a loadout to start dressing your character."}
          </p>
        </ItemContent>
      </Item>

      <div className="flex flex-col gap-4">
        <Item variant="outline">
          <ItemHeader>
            <ItemTitle>Equipped Loadout</ItemTitle>
          </ItemHeader>
          <ItemContent>
            {loadouts.length === 0 ? (
              <p className="text-sm text-muted-foreground">
                You have no loadouts yet. Head to the Loadouts tab to create one, then come back
                here to equip it.
              </p>
            ) : (
              <div className="flex flex-col gap-3">
                <div className="flex items-center gap-2">
                  <Combobox
                    className="flex-1"
                    value={equippedLoadout ? String(equippedLoadout.id) : ""}
                    onValueChange={(v) => handleEquip(Number(v))}
                    disabled={busy}
                    placeholder={
                      equippedLoadout ? equippedLoadout.name : "Select a loadout to equip"
                    }
                    searchPlaceholder="Search loadouts..."
                    options={loadouts.map((l) => ({
                      value: String(l.id),
                      label: l.name,
                    }))}
                  />
                  {equippedLoadout && (
                    <Button
                      variant="outline"
                      size="sm"
                      onClick={() => setPickerSlot("helmet")}
                      disabled={busy}
                    >
                      Equip Gear
                    </Button>
                  )}
                </div>

                {!equippedLoadout && (
                  <p className="text-sm text-muted-foreground">
                    Choose a loadout above. It becomes the active loadout that the wardrobe
                    reflects.
                  </p>
                )}
              </div>
            )}
          </ItemContent>
        </Item>

        <Item variant="outline">
          <ItemHeader>
            <ItemTitle>Current Equipment</ItemTitle>
          </ItemHeader>
          <ItemContent>
            {filled.length === 0 ? (
              <p className="text-sm text-muted-foreground">
                Nothing equipped. Select a loadout above and click its equipment slots.
              </p>
            ) : (
              <div className="grid grid-cols-1 sm:grid-cols-2 gap-1.5">
                {filled.map((layout) => {
                  const asset = resolveSlotAsset(slots[layout.name], items);
                  if (!asset) return null;
                  return (
                    <button
                      key={layout.name}
                      type="button"
                      onClick={() => setPickerSlot(layout.name)}
                      className="flex items-center gap-2 rounded-md border border-border px-3 py-2 text-left text-sm hover:bg-muted transition-colors"
                    >
                      <span className="text-amber-400">
                        {getAssetIcon(asset.assetType, "size-4")}
                      </span>
                      <span className="flex-1 min-w-0">
                        <span className="block text-xs text-muted-foreground">{layout.label}</span>
                        <span className="block font-medium truncate">
                          {resolveSlotDisplayName(asset, items)}
                        </span>
                      </span>
                      <span className="text-xs text-muted-foreground">
                        {getAssetTypeLabel(asset.assetType)}
                      </span>
                    </button>
                  );
                })}
              </div>
            )}
          </ItemContent>
        </Item>

        <p className="text-sm text-muted-foreground">
          {userName}, you have {items.length.toLocaleString()} distinct items in your locker.
        </p>
      </div>

      {pickerLayout && pickerConfig && (
        <WardrobeSlotPicker
          open={!!pickerSlot}
          onOpenChange={(open) => {
            if (!open) setPickerSlot(null);
          }}
          slot={pickerConfig}
          items={items}
          currentValue={pickerValue}
          busy={busy}
          onPick={(assetId) => handlePick(pickerLayout.name, assetId)}
        />
      )}
    </div>
  );
}