'use client';

import { useState, useTransition } from 'react';
import {
  Table,
  TableBody,
  TableCaption,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from '@/components/ui/form';
import { Input } from '@/components/ui/input';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { zodResolver } from '@hookform/resolvers/zod';
import { useForm } from 'react-hook-form';
import { z } from 'zod';
import { Edit, Trash2 } from 'lucide-react';
import Big from 'big.js';
import { updateAsset, deleteAsset } from '@/actions/asset';
import { AddAssetDialog } from '@/components/assets/add-asset-dialog';
import { SyncButton } from '@/components/assets/sync-button';

interface Asset {
  id: string;
  symbol: string;
  name: string | null;
  type: string;
  exchange: string | null;
  baseCurrency: string;
  latestPrice: string;
  createdAt: Date | null;
}

export default function AssetsPageClient({ assets }: { assets: Asset[] }) {
  const [isPending, startTransition] = useTransition();
  const [deleteTarget, setDeleteTarget] = useState<Asset | null>(null);
  const [editTarget, setEditTarget] = useState<Asset | null>(null);

  const typeLabels: Record<string, string> = {
    STOCK: '股票',
    CRYPTO: '加密貨幣',
    CASH: '現金',
  };

  const editForm = useForm<{ symbol: string; name: string; baseCurrency: string }>({
    resolver: zodResolver(z.object({
      symbol: z.string().min(1, '资产代码不能为空'),
      name: z.string(),
      baseCurrency: z.string().min(2, '基础币种至少2个字符'),
    })),
    defaultValues: { symbol: '', name: '', baseCurrency: '' },
  });

  function handleEditClick(asset: Asset) {
    setEditTarget(asset);
    editForm.reset({ symbol: asset.symbol, name: asset.name || '', baseCurrency: asset.baseCurrency });
  }

  function handleEditSubmit(values: { symbol: string; name: string; baseCurrency: string }) {
    if (!editTarget) return;
    startTransition(async () => {
      const result = await updateAsset({
        id: editTarget.id,
        symbol: values.symbol,
        baseCurrency: values.baseCurrency,
      });
      if (result.success) {
        setEditTarget(null);
        editForm.reset();
        window.location.reload();
      }
    });
  }

  function handleDelete(asset: Asset) {
    startTransition(async () => {
      await deleteAsset(asset.id);
      setDeleteTarget(null);
      window.location.reload();
    });
  }

  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between">
        <h1 className="text-2xl font-bold">资产列表</h1>
        <div className="flex gap-2">
          <SyncButton />
          <AddAssetDialog />
        </div>
      </div>

      <div className="rounded-md border">
        <Table>
          <TableCaption>数据库中所有已录入的资产</TableCaption>
          <TableHeader>
            <TableRow>
              <TableHead>名称</TableHead>
              <TableHead>资产代码</TableHead>
              <TableHead>类型</TableHead>
              <TableHead>基础币种</TableHead>
              <TableHead>当前市价 (Latest Price)</TableHead>
              <TableHead>创建时间</TableHead>
              <TableHead className="w-[100px]">操作</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            {assets.length === 0 ? (
              <TableRow>
                <TableCell colSpan={7} className="text-center text-muted-foreground">
                  暂无资产，点击"添加资产"按钮录入第一个资产
                </TableCell>
              </TableRow>
            ) : (
              assets.map((asset) => (
                <TableRow key={asset.id}>
                  <TableCell className="font-medium">{asset.name || '-'}</TableCell>
                  <TableCell>{asset.symbol}</TableCell>
                  <TableCell>{typeLabels[asset.type] || asset.type}</TableCell>
                  <TableCell>{asset.baseCurrency}</TableCell>
                  <TableCell>{asset.latestPrice ? new Big(asset.latestPrice).toString() : '-'}</TableCell>
                  <TableCell>
                    {asset.createdAt
                      ? new Date(asset.createdAt).toLocaleString('zh-CN')
                      : '-'}
                  </TableCell>
                  <TableCell>
                    <div className="flex gap-1">
                      <Button
                        variant="ghost"
                        size="icon"
                        onClick={() => handleEditClick(asset)}
                      >
                        <Edit className="h-4 w-4" />
                      </Button>
                      <Button
                        variant="ghost"
                        size="icon"
                        onClick={() => setDeleteTarget(asset)}
                        className="text-red-500 hover:text-red-700"
                      >
                        <Trash2 className="h-4 w-4" />
                      </Button>
                    </div>
                  </TableCell>
                </TableRow>
              ))
            )}
          </TableBody>
        </Table>
      </div>

      <Dialog open={!!editTarget} onOpenChange={(open) => !open && setEditTarget(null)}>
        <DialogContent className="sm:max-w-[425px]">
          <DialogHeader>
            <DialogTitle>编辑资产</DialogTitle>
            <DialogDescription>修改资产的基本信息</DialogDescription>
          </DialogHeader>
          <Form {...editForm}>
            <form onSubmit={editForm.handleSubmit(handleEditSubmit)} className="space-y-4">
              <FormField
                control={editForm.control}
                name="symbol"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>资产代码</FormLabel>
                    <FormControl>
                      <Input {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={editForm.control}
                name="name"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>股票名称</FormLabel>
                    <FormControl>
                      <Input placeholder="可选" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={editForm.control}
                name="baseCurrency"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>基础币种</FormLabel>
                    <FormControl>
                      <Input {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <DialogFooter>
                <Button type="submit" disabled={isPending}>
                  {isPending ? '保存中...' : '保存'}
                </Button>
              </DialogFooter>
            </form>
          </Form>
        </DialogContent>
      </Dialog>

      <Dialog open={!!deleteTarget} onOpenChange={(open) => !open && setDeleteTarget(null)}>
        <DialogContent className="sm:max-w-[400px]">
          <DialogHeader>
            <DialogTitle>确认删除</DialogTitle>
            <DialogDescription>
              确定要删除资产 <strong>{deleteTarget?.symbol}</strong> 吗？此操作不可撤销。
            </DialogDescription>
          </DialogHeader>
          <DialogFooter className="gap-2 sm:gap-0">
            <Button
              variant="outline"
              onClick={() => setDeleteTarget(null)}
            >
              取消
            </Button>
            <Button
              variant="destructive"
              onClick={() => deleteTarget && handleDelete(deleteTarget)}
            >
              删除
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </div>
  );
}