"use client";

import { useState } from "react";
import { ChevronDown, ChevronRight, Plus, Tag } from "lucide-react";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { CategoryCombobox } from "@/components/ui/category-combobox";
import { cn } from "@/lib/utils";
import type { Transaction, Category } from "@/lib/types";

interface TransactionGroup {
  key: string;
  displayName: string;
  transactions: Transaction[];
  totalAmount: number;
  suggestedKeyword: string;
}

interface RuleGroupCardProps {
  group: TransactionGroup;
  isExpanded: boolean;
  onToggleExpand: () => void;
  onCreateRule: () => void;
  onCategorize: (categoryId: string | null) => void;
  categories: Category[];
  formatCurrency: (amount: number) => string;
  formatDate: (date: string) => string;
}

export function RuleGroupCard({
  group,
  isExpanded,
  onToggleExpand,
  onCreateRule,
  onCategorize,
  categories,
  formatCurrency,
  formatDate,
}: RuleGroupCardProps) {
  const [selectedCategoryId, setSelectedCategoryId] = useState<string | null>(null);

  const avgAmount =
    group.transactions.reduce((sum, t) => sum + t.amount, 0) /
    group.transactions.length;
  const isDebit = avgAmount < 0;

  const handleCategorySelect = (categoryId: string | null) => {
    setSelectedCategoryId(null); // Reset après sélection
    onCategorize(categoryId);
  };

  return (
    <div className="border border-border rounded-lg bg-card overflow-hidden">
      {/* Header */}
      <div
        className="flex items-center gap-3 p-4 cursor-pointer hover:bg-accent/5 transition-colors"
        onClick={onToggleExpand}
      >
        <Button variant="ghost" size="icon" className="h-6 w-6 shrink-0">
          {isExpanded ? (
            <ChevronDown className="h-4 w-4" />
          ) : (
            <ChevronRight className="h-4 w-4" />
          )}
        </Button>

        <div className="flex-1 min-w-0">
          <div className="flex items-center gap-2">
            <span className="font-medium text-foreground truncate">
              {group.displayName}
            </span>
            <Badge variant="secondary" className="shrink-0">
              {group.transactions.length} transaction
              {group.transactions.length > 1 ? "s" : ""}
            </Badge>
          </div>
          <div className="flex items-center gap-2 mt-1 text-sm text-muted-foreground">
            <Tag className="h-3 w-3" />
            <span className="font-mono text-xs bg-muted px-1.5 py-0.5 rounded">
              {group.suggestedKeyword}
            </span>
          </div>
        </div>

        <div className="flex items-center gap-4">
          <div className="text-right">
            <div
              className={cn(
                "font-semibold tabular-nums",
                isDebit ? "text-destructive" : "text-success"
              )}
            >
              {formatCurrency(group.totalAmount)}
            </div>
            <div className="text-xs text-muted-foreground">
              Moy: {formatCurrency(avgAmount)}
            </div>
          </div>

          <div className="flex items-center gap-2 shrink-0">
            <div onClick={(e) => e.stopPropagation()}>
              <CategoryCombobox
                categories={categories}
                value={selectedCategoryId}
                onChange={handleCategorySelect}
                placeholder="Catégoriser..."
                width="w-[300px]"
                buttonWidth="w-auto"
              />
            </div>
            <Button
              size="sm"
              onClick={(e) => {
                e.stopPropagation();
                onCreateRule();
              }}
            >
              <Plus className="h-4 w-4 mr-1" />
              Créer règle
            </Button>
          </div>
        </div>
      </div>

      {/* Expanded transactions list */}
      {isExpanded && (
        <div className="border-t border-border bg-muted/30">
          <div className="max-h-64 overflow-y-auto">
            <table className="w-full text-sm">
              <thead className="bg-muted/50 sticky top-0">
                <tr>
                  <th className="px-4 py-2 text-left font-medium text-muted-foreground">
                    Date
                  </th>
                  <th className="px-4 py-2 text-left font-medium text-muted-foreground">
                    Description
                  </th>
                  <th className="px-4 py-2 text-right font-medium text-muted-foreground">
                    Montant
                  </th>
                </tr>
              </thead>
              <tbody>
                {group.transactions.map((transaction) => (
                  <tr
                    key={transaction.id}
                    className="border-t border-border/50 hover:bg-muted/50"
                  >
                    <td className="px-4 py-2 text-muted-foreground whitespace-nowrap">
                      {formatDate(transaction.date)}
                    </td>
                    <td className="px-4 py-2 truncate max-w-md">
                      {transaction.description}
                      {transaction.memo && (
                        <span className="text-muted-foreground ml-2">
                          ({transaction.memo})
                        </span>
                      )}
                    </td>
                    <td
                      className={cn(
                        "px-4 py-2 text-right tabular-nums whitespace-nowrap",
                        transaction.amount < 0
                          ? "text-destructive"
                          : "text-success"
                      )}
                    >
                      {formatCurrency(transaction.amount)}
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
        </div>
      )}
    </div>
  );
}