import { useState } from "react";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
import { useToast } from "@/hooks/use-toast";
import { queryClient } from "@/lib/queryClient";

interface LoginModalProps {
  isOpen: boolean;
  onClose: () => void;
}

export default function LoginModal({ isOpen, onClose }: LoginModalProps) {
  const [username, setUsername] = useState("");
  const [password, setPassword] = useState("");
  const [isLoading, setIsLoading] = useState(false);
  const { toast } = useToast();

  const handleLogin = async (e: React.FormEvent) => {
    e.preventDefault();
    setIsLoading(true);

    try {
      const response = await fetch("/api/login", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        credentials: "include",
        body: JSON.stringify({ username, password }),
      });

      if (response.ok) {
        const user = await response.json();
        toast({
          title: "로그인 성공",
          description: `환영합니다, ${user.firstName}님!`,
        });
        
        // Invalidate auth queries to refresh user state
        queryClient.invalidateQueries({ queryKey: ["/api/auth/user"] });
        
        // Reset form and close modal
        setUsername("");
        setPassword("");
        onClose();
      } else {
        const error = await response.json();
        toast({
          title: "로그인 실패",
          description: error.message || "잘못된 아이디 또는 비밀번호입니다.",
          variant: "destructive",
        });
      }
    } catch (error) {
      toast({
        title: "로그인 오류",
        description: "로그인 중 오류가 발생했습니다.",
        variant: "destructive",
      });
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <Dialog open={isOpen} onOpenChange={onClose}>
      <DialogContent className="sm:max-w-[425px]" data-testid="login-modal">
        <DialogHeader>
          <DialogTitle>로그인</DialogTitle>
        </DialogHeader>
        <form onSubmit={handleLogin} className="space-y-4">
          <div className="space-y-2">
            <Label htmlFor="username">아이디</Label>
            <Input
              id="username"
              type="text"
              value={username}
              onChange={(e) => setUsername(e.target.value)}
              onInvalid={(e) => (e.target as HTMLInputElement).setCustomValidity('Please enter your username')}
              onInput={(e) => (e.target as HTMLInputElement).setCustomValidity('')}
              placeholder="아이디를 입력하세요"
              required
              data-testid="input-username"
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="password">비밀번호</Label>
            <Input
              id="password"
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              onInvalid={(e) => (e.target as HTMLInputElement).setCustomValidity('Please enter your password')}
              onInput={(e) => (e.target as HTMLInputElement).setCustomValidity('')}
              placeholder="비밀번호를 입력하세요"
              required
              data-testid="input-password"
            />
          </div>
          <div className="flex space-x-2 pt-4">
            <Button
              type="submit"
              className="flex-1"
              disabled={isLoading}
              data-testid="button-login-submit"
            >
              {isLoading ? "로그인 중..." : "로그인"}
            </Button>
            <Button
              type="button"
              variant="outline"
              onClick={onClose}
              disabled={isLoading}
              data-testid="button-login-cancel"
            >
              취소
            </Button>
          </div>
        </form>
      </DialogContent>
    </Dialog>
  );
}