"use client";

import { useState } from "react";
import { signIn } from "next-auth/react";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
import { Separator } from "@/components/ui/separator";
import { toast } from "sonner";
import { Loader2 } from "lucide-react";

interface AuthModalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  defaultTab?: "signin" | "signup";
}

export function AuthModal({ open, onOpenChange, defaultTab = "signin" }: AuthModalProps) {
  const [loading, setLoading] = useState(false);
  const [signInData, setSignInData] = useState({ email: "", password: "" });
  const [signUpData, setSignUpData] = useState({
    name: "",
    email: "",
    password: "",
    confirmPassword: "",
    phone: "",
  });

  const handleSignIn = async (e: React.FormEvent) => {
    e.preventDefault();
    setLoading(true);

    try {
      const result = await signIn("credentials", {
        email: signInData.email,
        password: signInData.password,
        redirect: false,
      });

      if (result?.error) {
        toast.error("Invalid email or password");
      } else {
        toast.success("Signed in successfully");
        onOpenChange(false);
        setSignInData({ email: "", password: "" });
      }
    } catch (error) {
      toast.error("Something went wrong");
    } finally {
      setLoading(false);
    }
  };

  const handleSignUp = async (e: React.FormEvent) => {
    e.preventDefault();

    if (signUpData.password !== signUpData.confirmPassword) {
      toast.error("Passwords do not match");
      return;
    }

    if (signUpData.password.length < 6) {
      toast.error("Password must be at least 6 characters");
      return;
    }

    setLoading(true);

    try {
      const res = await fetch("/api/auth/register", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          name: signUpData.name,
          email: signUpData.email,
          password: signUpData.password,
          phone: signUpData.phone,
        }),
      });

      const data = await res.json();

      if (res.ok) {
        // Auto sign in after registration
        const result = await signIn("credentials", {
          email: signUpData.email,
          password: signUpData.password,
          redirect: false,
        });

        if (!result?.error) {
          toast.success("Account created successfully");
          onOpenChange(false);
          setSignUpData({ name: "", email: "", password: "", confirmPassword: "", phone: "" });
        }
      } else {
        toast.error(data.error || "Failed to create account");
      }
    } catch (error) {
      toast.error("Something went wrong");
    } finally {
      setLoading(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-md">
        <DialogHeader>
          <DialogTitle>Welcome to BDShop</DialogTitle>
        </DialogHeader>

        <Tabs defaultValue={defaultTab} className="w-full">
          <TabsList className="grid w-full grid-cols-2">
            <TabsTrigger value="signin">Sign In</TabsTrigger>
            <TabsTrigger value="signup">Sign Up</TabsTrigger>
          </TabsList>

          {/* Sign In */}
          <TabsContent value="signin">
            <form onSubmit={handleSignIn} className="space-y-4">
              <div>
                <Label htmlFor="signin-email">Email</Label>
                <Input
                  id="signin-email"
                  type="email"
                  placeholder="Enter your email"
                  value={signInData.email}
                  onChange={(e) => setSignInData({ ...signInData, email: e.target.value })}
                  required
                />
              </div>
              <div>
                <Label htmlFor="signin-password">Password</Label>
                <Input
                  id="signin-password"
                  type="password"
                  placeholder="Enter your password"
                  value={signInData.password}
                  onChange={(e) => setSignInData({ ...signInData, password: e.target.value })}
                  required
                />
              </div>
              <Button type="submit" className="w-full" disabled={loading}>
                {loading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                Sign In
              </Button>
            </form>

            <div className="relative my-4">
              <Separator />
              <span className="absolute left-1/2 -translate-x-1/2 -translate-y-1/2 bg-background px-2 text-xs text-muted-foreground">
                or continue with
              </span>
            </div>

            <div className="grid grid-cols-2 gap-3">
              <Button variant="outline" onClick={() => signIn("google")}>
                <svg className="w-5 h-5 mr-2" viewBox="0 0 24 24">
                  <path
                    fill="currentColor"
                    d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
                  />
                  <path
                    fill="currentColor"
                    d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
                  />
                  <path
                    fill="currentColor"
                    d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
                  />
                  <path
                    fill="currentColor"
                    d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
                  />
                </svg>
                Google
              </Button>
              <Button variant="outline" onClick={() => signIn("facebook")}>
                <svg className="w-5 h-5 mr-2" fill="currentColor" viewBox="0 0 24 24">
                  <path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z" />
                </svg>
                Facebook
              </Button>
            </div>
          </TabsContent>

          {/* Sign Up */}
          <TabsContent value="signup">
            <form onSubmit={handleSignUp} className="space-y-4">
              <div>
                <Label htmlFor="signup-name">Full Name</Label>
                <Input
                  id="signup-name"
                  type="text"
                  placeholder="Enter your name"
                  value={signUpData.name}
                  onChange={(e) => setSignUpData({ ...signUpData, name: e.target.value })}
                  required
                />
              </div>
              <div>
                <Label htmlFor="signup-email">Email</Label>
                <Input
                  id="signup-email"
                  type="email"
                  placeholder="Enter your email"
                  value={signUpData.email}
                  onChange={(e) => setSignUpData({ ...signUpData, email: e.target.value })}
                  required
                />
              </div>
              <div>
                <Label htmlFor="signup-phone">Phone Number</Label>
                <Input
                  id="signup-phone"
                  type="tel"
                  placeholder="01XXXXXXXXX"
                  value={signUpData.phone}
                  onChange={(e) => setSignUpData({ ...signUpData, phone: e.target.value })}
                />
              </div>
              <div>
                <Label htmlFor="signup-password">Password</Label>
                <Input
                  id="signup-password"
                  type="password"
                  placeholder="Create a password"
                  value={signUpData.password}
                  onChange={(e) => setSignUpData({ ...signUpData, password: e.target.value })}
                  required
                />
              </div>
              <div>
                <Label htmlFor="signup-confirm-password">Confirm Password</Label>
                <Input
                  id="signup-confirm-password"
                  type="password"
                  placeholder="Confirm your password"
                  value={signUpData.confirmPassword}
                  onChange={(e) => setSignUpData({ ...signUpData, confirmPassword: e.target.value })}
                  required
                />
              </div>
              <Button type="submit" className="w-full" disabled={loading}>
                {loading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                Create Account
              </Button>
            </form>

            <p className="text-xs text-muted-foreground mt-4 text-center">
              By creating an account, you agree to our Terms of Service and Privacy Policy.
            </p>
          </TabsContent>
        </Tabs>
      </DialogContent>
    </Dialog>
  );
}