/**
 * 庫存表格元件 (Warehouse 版本)
 * 顯示庫存項目列表（依商品分組並支援折疊）
 */

import { useState, useEffect } from "react";

import { AlertTriangle, Trash2, Eye, ChevronDown, ChevronRight, CheckCircle, Package } from "lucide-react";
import {
    Table,
    TableBody,
    TableCell,
    TableHead,
    TableHeader,
    TableRow,
} from "@/Components/ui/table";
import { Button } from "@/Components/ui/button";
import { Badge } from "@/Components/ui/badge";
import {
    Collapsible,
    CollapsibleContent,
} from "@/Components/ui/collapsible";
import {
    Tooltip,
    TooltipContent,
    TooltipProvider,
    TooltipTrigger,
} from "@/Components/ui/tooltip";
import { GroupedInventory } from "@/types/warehouse";
import { formatDate } from "@/utils/format";
import { Can } from "@/Components/Permission/Can";


interface InventoryTableProps {
    inventories: GroupedInventory[];
    onView: (id: string) => void;
    onDelete: (id: string) => void;
    onViewProduct?: (productId: string) => void;
}

export default function InventoryTable({
    inventories,
    onView,
    onDelete,
    onViewProduct,
    warehouse,
}: InventoryTableProps & { warehouse: any }) {
    // 判斷是否為販賣機倉庫
    const isVending = warehouse?.type === "vending";

    // 每個商品的展開/折疊狀態 - 使用 sessionStorage 保留狀態 (改用 Array 以利序列化)
    // 解決使用 Link 返回時 State 被重置的問題
    const storageKey = `inventory_expanded_${warehouse.id}`;
    const [expandedProducts, setExpandedProducts] = useState<string[]>(() => {
        if (typeof window === 'undefined') return [];
        try {
            const saved = sessionStorage.getItem(storageKey);
            return saved ? JSON.parse(saved) : [];
        } catch (e) {
            console.error("Failed to parse expanded state", e);
            return [];
        }
    });

    useEffect(() => {
        try {
            sessionStorage.setItem(storageKey, JSON.stringify(expandedProducts));
        } catch (e) {
            console.error("Failed to save expanded state", e);
        }
    }, [expandedProducts, storageKey]);

    // console.log('InventoryTable Rendered', { warehouseId: warehouse.id, expandedProducts });

    if (inventories.length === 0) {
        return (
            <div className="text-center py-12 text-gray-400">
                <p>無符合條件的品項</p>
                <p className="text-sm mt-1">請調整搜尋或篩選條件</p>
            </div>
        );
    }

    // 按商品名稱排序
    const sortedInventories = [...inventories].sort((a, b) =>
        a.productName.localeCompare(b.productName, "zh-TW")
    );

    const toggleProduct = (productId: string) => {
        setExpandedProducts((prev) => {
            if (prev.includes(productId)) {
                return prev.filter(id => id !== productId);
            } else {
                return [...prev, productId];
            }
        });
    };

    // 獲取狀態徽章
    const getStatusBadge = (status: string) => {
        switch (status) {
            case "正常":
                return (
                    <Badge className="bg-green-100 text-green-700 border-green-300">
                        <CheckCircle className="mr-1 h-3 w-3" />
                        正常
                    </Badge>
                );

            case "低於":
                return (
                    <Badge className="bg-red-100 text-red-700 border-red-300">
                        <AlertTriangle className="mr-1 h-3 w-3" />
                        低於
                    </Badge>
                );
            default:
                return null;
        }
    };

    return (
        <TooltipProvider>
            <div className="space-y-4 p-4">
                {sortedInventories.map((group) => {
                    const totalQuantity = group.totalQuantity;

                    // 使用後端提供的狀態
                    const status = group.status;

                    const isLowStock = status === "低於";
                    const isExpanded = expandedProducts.includes(group.productId);
                    const hasInventory = group.batches.length > 0;

                    return (
                        <Collapsible
                            key={group.productId}
                            open={isExpanded}
                            onOpenChange={() => toggleProduct(group.productId)}
                        >
                            <div className="border rounded-lg overflow-hidden">
                                {/* 商品標題 - 可點擊折疊 */}
                                <div
                                    onClick={() => toggleProduct(group.productId)}
                                    className={`px-4 py-3 border-b cursor-pointer hover:bg-gray-100 transition-colors ${isLowStock ? "bg-red-50" : "bg-gray-50"
                                        }`}
                                >
                                    <div className="flex items-center justify-between">
                                        <div className="flex items-center gap-3">
                                            {/* 折疊圖示 */}
                                            {isExpanded ? (
                                                <ChevronDown className="h-5 w-5 text-gray-600" />
                                            ) : (
                                                <ChevronRight className="h-5 w-5 text-gray-600" />
                                            )}
                                            <h3 className="font-semibold text-gray-900">
                                                {group.productName}
                                                {isVending && group.batches.length > 0 && (() => {
                                                    const locations = Array.from(new Set(group.batches.map(b => b.location).filter(Boolean)));
                                                    return locations.length > 0 ? (
                                                        <span className="ml-2 text-primary-main font-bold">
                                                            {locations.map(loc => `[${loc}]`).join('')}
                                                        </span>
                                                    ) : null;
                                                })()}
                                            </h3>
                                            <span className="text-sm text-gray-500">
                                                {isVending ? '' : (hasInventory ? `${group.batches.length} 個批號` : '無庫存')}
                                            </span>
                                            {group.batches.some(b => b.expiryDate && new Date(b.expiryDate) < new Date()) && (
                                                <Badge className="bg-red-50 text-red-600 border-red-200">
                                                    <AlertTriangle className="mr-1 h-3 w-3" />
                                                    含過期項目
                                                </Badge>
                                            )}
                                        </div>
                                        <div className="flex items-center gap-4">
                                            <div className="text-sm">
                                                <span className="text-gray-600">
                                                    總庫存：<span className={`font-medium ${isLowStock ? "text-red-600" : "text-gray-900"}`}>{totalQuantity} {group.baseUnit}</span>
                                                </span>
                                            </div>
                                            <Can permission="inventory.view_cost">
                                                <div className="text-sm">
                                                    <span className="text-gray-600">
                                                        總價值：<span className="font-medium text-gray-900">${group.totalValue?.toLocaleString()}</span>
                                                    </span>
                                                </div>
                                            </Can>
                                            {group.safetyStock !== null ? (
                                                <>
                                                    <div className="text-sm">
                                                        <span className="text-gray-600">
                                                            安全庫存：<span className="font-medium text-gray-900">{group.safetyStock} {group.baseUnit}</span>
                                                        </span>
                                                    </div>
                                                    <div>
                                                        {status && getStatusBadge(status)}
                                                    </div>
                                                </>
                                            ) : (
                                                <Badge variant="outline" className="text-gray-500">
                                                    未設定
                                                </Badge>
                                            )}
                                            {onViewProduct && (
                                                <Button
                                                    type="button"
                                                    variant="outline"
                                                    size="sm"
                                                    onClick={(e) => {
                                                        e.stopPropagation();
                                                        onViewProduct(group.productId);
                                                    }}
                                                    className="button-outlined-primary"
                                                >
                                                    <Eye className="h-4 w-4" />
                                                </Button>
                                            )}
                                        </div>
                                    </div>
                                </div>

                                {/* 商品表格 - 可折疊內容 */}
                                <CollapsibleContent>
                                    {hasInventory ? (
                                        <div className="overflow-x-auto">
                                            <Table>
                                                <TableHeader>
                                                    <TableRow>
                                                        <TableHead className="w-[5%]">#</TableHead>
                                                        <TableHead className="w-[15%]">批號</TableHead>
                                                        <TableHead className="w-[10%]">{isVending ? "貨道" : "儲位"}</TableHead>
                                                        <TableHead className="w-[10%]">庫存數量</TableHead>
                                                        <Can permission="inventory.view_cost">
                                                            <TableHead className="w-[10%]">單位成本</TableHead>
                                                            <TableHead className="w-[10%]">總價值</TableHead>
                                                        </Can>
                                                        <TableHead className="w-[12%]">保存期限</TableHead>
                                                        <TableHead className="w-[12%]">最新入庫</TableHead>
                                                        <TableHead className="w-[12%]">最新出庫</TableHead>
                                                        <TableHead className="w-[8%] text-right">操作</TableHead>
                                                    </TableRow>
                                                </TableHeader>
                                                <TableBody>
                                                    {group.batches.map((batch, index) => {
                                                        return (
                                                            <TableRow key={batch.id}>
                                                                <TableCell className="text-grey-2">{index + 1}</TableCell>
                                                                <TableCell>{batch.batchNumber || "-"}</TableCell>
                                                                <TableCell className="font-medium text-primary-main">{batch.location || "-"}</TableCell>
                                                                <TableCell>
                                                                    <span>{batch.quantity} {batch.unit}</span>
                                                                </TableCell>
                                                                <Can permission="inventory.view_cost">
                                                                    <TableCell>${batch.unit_cost?.toLocaleString()}</TableCell>
                                                                    <TableCell>${batch.total_value?.toLocaleString()}</TableCell>
                                                                </Can>
                                                                <TableCell>
                                                                    {batch.expiryDate ? (
                                                                        <div className="flex items-center gap-2">
                                                                            <span className={new Date(batch.expiryDate) < new Date() ? "text-red-600 font-medium" : ""}>
                                                                                {formatDate(batch.expiryDate)}
                                                                            </span>
                                                                            {new Date(batch.expiryDate) < new Date() && (
                                                                                <Tooltip>
                                                                                    <TooltipTrigger asChild>
                                                                                        <AlertTriangle className="h-4 w-4 text-red-500 cursor-help" />
                                                                                    </TooltipTrigger>
                                                                                    <TooltipContent>
                                                                                        <p>此批號已過期</p>
                                                                                    </TooltipContent>
                                                                                </Tooltip>
                                                                            )}
                                                                        </div>
                                                                    ) : "-"}
                                                                </TableCell>
                                                                <TableCell>
                                                                    {batch.lastInboundDate ? formatDate(batch.lastInboundDate) : "-"}
                                                                </TableCell>
                                                                <TableCell>
                                                                    {batch.lastOutboundDate ? formatDate(batch.lastOutboundDate) : "-"}
                                                                </TableCell>
                                                                <TableCell className="text-right">
                                                                    <div className="flex justify-end gap-2">
                                                                        <Button
                                                                            type="button"
                                                                            variant="outline"
                                                                            size="sm"
                                                                            onClick={() => onView(batch.id)}
                                                                            className="button-outlined-primary"
                                                                        >
                                                                            <Eye className="h-4 w-4" />
                                                                        </Button>

                                                                        <Can permission="inventory.delete">
                                                                            <Tooltip>
                                                                                <TooltipTrigger asChild>
                                                                                    <div className="inline-block">
                                                                                        <Button
                                                                                            type="button"
                                                                                            variant="outline"
                                                                                            size="sm"
                                                                                            onClick={() => onDelete(batch.id)}
                                                                                            className={batch.quantity > 0 ? "opacity-50 cursor-not-allowed border-gray-200 text-gray-400 hover:bg-transparent" : "button-outlined-error"}
                                                                                            disabled={batch.quantity > 0}
                                                                                        >
                                                                                            <Trash2 className="h-4 w-4" />
                                                                                        </Button>
                                                                                    </div>
                                                                                </TooltipTrigger>
                                                                                <TooltipContent>
                                                                                    <p className="text-xs">{batch.quantity > 0 ? "庫存須為 0 才可刪除" : "刪除"}</p>
                                                                                </TooltipContent>
                                                                            </Tooltip>
                                                                        </Can>
                                                                    </div>
                                                                </TableCell>
                                                            </TableRow>
                                                        );
                                                    })}
                                                </TableBody>
                                            </Table>
                                        </div>
                                    ) : (
                                        <div className="px-4 py-8 text-center text-gray-400 bg-gray-50">
                                            <Package className="h-8 w-8 mx-auto mb-2 opacity-50" />
                                            <p className="text-sm">此商品尚無庫存批號</p>
                                            <p className="text-xs mt-1">請點擊「新增庫存」進行入庫</p>
                                        </div>
                                    )}
                                </CollapsibleContent>
                            </div>
                        </Collapsible>
                    );
                })}


            </div >
        </TooltipProvider >
    );
}
