"use client";

import { useCallback, useEffect, useMemo, useState } from "react";
import { useRouter } from "next/navigation";
import type { Asset, Loadout, LockerStorage } from "@/payload-types";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Item, ItemContent, ItemHeader, ItemTitle } from "@/components/ui/item";
import { EventLedger } from "@/components/frontend/storage/EventLedger";
import { LockerGrid } from "./LockerGrid";
import { LockerGridToolbar } from "./LockerGridToolbar";
import { AddLockerItemDialog } from "./AddLockerItemDialog";
import { LoadoutsPanel } from "./LoadoutsPanel";
import { WardrobePanel } from "./WardrobePanel";
import { EquipmentEditorDialog } from "./EquipmentEditorDialog";
import { LockerSearch } from "./LockerSearch";
import { getAssetTypeLabel, type LockerGridItem } from "@/lib/locker";
import type { LockerSearchEntry } from "@/lib/locker/search";
import {
  autoArrangeLocker,
  attachItemFromGrid,
  mergeLockerStacks,
  moveLockerItem,
  removeLockerItem,
  rotateLockerItem,
  splitLockerStack,
} from "@/app/(frontend)/locker/actions";

interface LockerViewProps {
  locker: LockerStorage;
  gridWidth: number;
  gridHeight: number;
  loadouts: Loadout[];
  assetsCatalog: Asset[];
  isManager: boolean;
  userName: string;
}

export function LockerView({
  locker,
  gridWidth,
  gridHeight,
  loadouts,
  assetsCatalog,
  isManager,
  userName,
}: LockerViewProps) {
  const router = useRouter();
  const [tab, setTab] = useState("wardrobe");
  const [viewMode, setViewMode] = useState<"grid" | "list">("grid");
  const [selectedId, setSelectedId] = useState<string | null>(null);
  const [customizeId, setCustomizeId] = useState<string | null>(null);
  const [highlightId, setHighlightId] = useState<string | null>(null);
  const [eventLogKey, setEventLogKey] = useState(0);

  const items: LockerGridItem[] = useMemo(
    () =>
      (locker.items ?? [])
        .filter((entry) => entry.asset && typeof entry.asset === "object" && "id" in entry.asset)
        .map((entry) => {
          const asset = entry.asset as Asset;
          return {
            id: entry.id ?? `${asset.id}-${entry.gridX}-${entry.gridY}`,
            assetId: asset.id,
            quantity: entry.quantity,
            gridX: entry.gridX ?? 0,
            gridY: entry.gridY ?? 0,
            rotated: entry.rotated ?? false,
            asset,
            equipment: entry.equipment ?? undefined,
          };
        }),
    [locker.items],
  );

  const selectedItem = useMemo(
    () => items.find((i) => i.id === selectedId) ?? null,
    [items, selectedId],
  );

  const customizeItem = useMemo(
    () => items.find((i) => i.id === customizeId) ?? null,
    [items, customizeId],
  );

  useEffect(() => {
    if (!highlightId) return;
    const timer = setTimeout(() => setHighlightId(null), 3000);
    return () => clearTimeout(timer);
  }, [highlightId]);

  const refresh = useCallback(() => {
    router.refresh();
    setEventLogKey((k) => k + 1);
  }, [router]);

  const handleMoveItem = useCallback(
    async (entryId: string, gridX: number, gridY: number, rotated?: boolean) => {
      const result = await moveLockerItem(entryId, gridX, gridY, rotated);
      if (result.success) refresh();
    },
    [refresh],
  );

  const handleMergeStacks = useCallback(
    async (sourceId: string, targetId: string) => {
      const result = await mergeLockerStacks(sourceId, targetId);
      if (result.success) refresh();
    },
    [refresh],
  );

  const handleRotateItem = useCallback(
    async (entryId: string) => {
      const result = await rotateLockerItem(entryId);
      if (result.success) refresh();
    },
    [refresh],
  );

  const handleRemoveItem = useCallback(
    async (entryId: string) => {
      const result = await removeLockerItem(entryId);
      if (result.success) {
        setSelectedId(null);
        refresh();
      }
    },
    [refresh],
  );

  const handleSplitStack = useCallback(
    async (entryId: string, amount: number) => {
      const result = await splitLockerStack(entryId, amount);
      if (result.success) refresh();
    },
    [refresh],
  );

  const handleAutoArrange = useCallback(async () => {
    const result = await autoArrangeLocker();
    if (result.success) refresh();
  }, [refresh]);

  const handleAttachItem = useCallback(
    async (weaponEntryId: string, attachmentEntryId: string) => {
      const result = await attachItemFromGrid(weaponEntryId, attachmentEntryId);
      if (result.success) refresh();
      return result;
    },
    [refresh],
  );

  const handleSearchSelect = useCallback(
    (entry: LockerSearchEntry) => {
      setViewMode("grid");
      setTab("inventory");

      const gridItem = items.find((i) => i.assetId === entry.assetId) ?? null;

      if (gridItem && entry.asset.assetType === "weapon") {
        setSelectedId(gridItem.id);
        setCustomizeId(gridItem.id);
        return;
      }

      const parentId = entry.locations.find(
        (l) => (l.kind === "attached" || l.kind === "skin") && l.parentEntryId,
      )?.parentEntryId;

      if (parentId) {
        const parent = items.find((i) => i.id === parentId);
        if (parent && parent.asset.assetType === "weapon") {
          setSelectedId(parent.id);
          setCustomizeId(parent.id);
          return;
        }
      }

      if (gridItem) setHighlightId(gridItem.id);
    },
    [items],
  );

  return (
    <Tabs value={tab} onValueChange={setTab}>
      <div className="flex items-center justify-between gap-3">
        <TabsList>
          <TabsTrigger value="wardrobe">Wardrobe</TabsTrigger>
          <TabsTrigger value="inventory">Inventory</TabsTrigger>
          <TabsTrigger value="loadouts">Loadouts</TabsTrigger>
        </TabsList>
        <LockerSearch items={items} loadouts={loadouts} onSelect={handleSearchSelect} />
      </div>

      <TabsContent value="wardrobe">
        <WardrobePanel
          userName={userName}
          loadouts={loadouts}
          equippedLoadout={loadouts.find((l) => l.equipped) ?? null}
          items={items}
        />
      </TabsContent>

      <TabsContent value="inventory" className="flex flex-col gap-4">
        <div className="flex items-center justify-between">
          <LockerGridToolbar
            gridWidth={gridWidth}
            gridHeight={gridHeight}
            items={items}
            selectedItem={selectedItem}
            viewMode={viewMode}
            onViewModeChange={setViewMode}
            onAutoArrange={handleAutoArrange}
            onRotate={handleRotateItem}
            onRemove={handleRemoveItem}
            onSplit={handleSplitStack}
            onCustomize={() => setCustomizeId(selectedItem?.id ?? null)}
          />
          {isManager && <AddLockerItemDialog assets={assetsCatalog} />}
        </div>

        {items.length === 0 ? (
          <Item variant="outline">
            <ItemHeader>
              <ItemTitle className="text-muted-foreground">Empty Locker</ItemTitle>
            </ItemHeader>
            <ItemContent>
              <p className="text-sm text-muted-foreground">
                {isManager
                  ? "Your locker is empty. Add items to get started."
                  : "Your locker is empty. Reach out to logistics to have equipment issued."}
              </p>
            </ItemContent>
          </Item>
        ) : viewMode === "grid" ? (
          <LockerGrid
            gridWidth={gridWidth}
            gridHeight={gridHeight}
            items={items}
            onMoveItem={handleMoveItem}
            onMergeStacks={handleMergeStacks}
            onRotateItem={handleRotateItem}
            onRemoveItem={handleRemoveItem}
            onSelectItem={(item) => setSelectedId(item?.id ?? null)}
            selectedItem={selectedItem}
            highlightId={highlightId}
            onAttachItem={handleAttachItem}
          />
        ) : (
          <Item variant="outline">
            <ItemContent>
              <div className="flex flex-col">
                {items.map((entry, index) => (
                  <div key={entry.id}>
                    <button
                      type="button"
                      className="flex items-center gap-3 py-2.5 w-full text-left"
                      onClick={() => setSelectedId(entry.id)}
                    >
                      <span className="text-sm font-medium flex-1 min-w-0 truncate">
                        {entry.equipment?.customName?.trim() || entry.asset.name}
                      </span>
                      <span className="text-xs text-muted-foreground">
                        {getAssetTypeLabel(entry.asset.assetType)}
                      </span>
                      <span className="text-xs text-muted-foreground shrink-0">
                        {entry.quantity.toLocaleString()}×
                      </span>
                    </button>
                    {index < items.length - 1 && <div className="border-t border-border" />}
                  </div>
                ))}
              </div>
            </ItemContent>
          </Item>
        )}

        <EventLedger
          targetCollection="locker-storages"
          targetId={locker.id}
          refreshKey={eventLogKey}
        />
      </TabsContent>

      <TabsContent value="loadouts">
        <LoadoutsPanel loadouts={loadouts} ownedItems={items} />
      </TabsContent>

      <EquipmentEditorDialog
        item={customizeItem}
        items={items}
        open={!!customizeItem}
        onOpenChange={(open) => {
          if (!open) setCustomizeId(null);
        }}
      />
    </Tabs>
  );
}