"use client";

import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { TrendingUp, TrendingDown, Wallet, CreditCard } from "lucide-react";
import type { BankingData } from "@/lib/types";
import { getAccountBalance } from "@/lib/account-utils";
import { cn } from "@/lib/utils";

interface OverviewCardsProps {
  data: BankingData;
}

export function OverviewCards({ data }: OverviewCardsProps) {
  const totalBalance = data.accounts.reduce(
    (sum, acc) => sum + getAccountBalance(acc),
    0,
  );

  const thisMonth = new Date();
  thisMonth.setDate(1);
  const thisMonthStr = thisMonth.toISOString().slice(0, 7);

  const monthTransactions = data.transactions.filter((t) =>
    t.date.startsWith(thisMonthStr),
  );

  const income = monthTransactions
    .filter((t) => t.amount > 0)
    .reduce((sum, t) => sum + t.amount, 0);

  const expenses = monthTransactions
    .filter((t) => t.amount < 0)
    .reduce((sum, t) => sum + Math.abs(t.amount), 0);

  const reconciled = data.transactions.filter((t) => t.isReconciled).length;
  const total = data.transactions.length;
  const reconciledPercent =
    total > 0 ? Math.round((reconciled / total) * 100) : 0;

  const formatCurrency = (amount: number) => {
    return new Intl.NumberFormat("fr-FR", {
      style: "currency",
      currency: "EUR",
    }).format(amount);
  };

  return (
    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-xs md:text-sm font-medium text-muted-foreground">
            Solde Total
          </CardTitle>
          <Wallet className="h-3 w-3 md:h-4 md:w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div
            className={cn(
              "text-xl md:text-2xl font-bold",
              totalBalance >= 0 ? "text-emerald-600" : "text-red-600",
            )}
          >
            {formatCurrency(totalBalance)}
          </div>
          <p className="text-[10px] md:text-xs text-muted-foreground mt-1">
            {data.accounts.length} compte{data.accounts.length > 1 ? "s" : ""}
          </p>
        </CardContent>
      </Card>

      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-xs md:text-sm font-medium text-muted-foreground">
            Revenus du mois
          </CardTitle>
          <TrendingUp className="h-3 w-3 md:h-4 md:w-4 text-emerald-600" />
        </CardHeader>
        <CardContent>
          <div className="text-xl md:text-2xl font-bold text-emerald-600">
            {formatCurrency(income)}
          </div>
          <p className="text-[10px] md:text-xs text-muted-foreground mt-1">
            {monthTransactions.filter((t) => t.amount > 0).length} opération
            {monthTransactions.filter((t) => t.amount > 0).length > 1
              ? "s"
              : ""}
          </p>
        </CardContent>
      </Card>

      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-xs md:text-sm font-medium text-muted-foreground">
            Dépenses du mois
          </CardTitle>
          <TrendingDown className="h-3 w-3 md:h-4 md:w-4 text-red-600" />
        </CardHeader>
        <CardContent>
          <div className="text-xl md:text-2xl font-bold text-red-600">
            {formatCurrency(expenses)}
          </div>
          <p className="text-[10px] md:text-xs text-muted-foreground mt-1">
            {monthTransactions.filter((t) => t.amount < 0).length} opération
            {monthTransactions.filter((t) => t.amount < 0).length > 1
              ? "s"
              : ""}
          </p>
        </CardContent>
      </Card>

      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-xs md:text-sm font-medium text-muted-foreground">
            Pointage
          </CardTitle>
          <CreditCard className="h-3 w-3 md:h-4 md:w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div className="text-xl md:text-2xl font-bold">{reconciledPercent}%</div>
          <p className="text-[10px] md:text-xs text-muted-foreground mt-1">
            {reconciled} / {total} opérations pointées
          </p>
        </CardContent>
      </Card>
    </div>
  );
}