'use client';

import { useState } from 'react';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Checkbox } from '@/components/ui/checkbox';
import { Label } from '@/components/ui/label';
import { Mail, Phone } from 'lucide-react';

type AuthProvider = 'GoogleOAuth' | 'AppleOAuth' | 'GitHubOAuth' | 'authkit';

export default function LoginPage() {
  const [stayLoggedIn, setStayLoggedIn] = useState(false);

  const handleLogin = (provider: AuthProvider) => {
    window.location.href = `/api/auth/login?provider=${provider}&stayLoggedIn=${stayLoggedIn}`;
  };

  return (
    <div className="min-h-screen flex items-center justify-center p-4 bg-gradient-to-br from-slate-50 to-slate-100 dark:from-slate-950 dark:to-slate-900 overflow-hidden relative">
      {/* Background Orbs */}
      <div className="absolute top-[-10%] left-[-10%] w-[40%] h-[40%] bg-primary/10 rounded-full blur-[120px] pointer-events-none" />
      <div className="absolute bottom-[-10%] right-[-10%] w-[40%] h-[40%] bg-purple-500/10 rounded-full blur-[120px] pointer-events-none" />

      <div className="w-full max-w-md mx-auto relative z-10">
        {/* Login Form */}
        <Card className="bg-white/70 dark:bg-slate-900/70 backdrop-blur-xl border-white/20 dark:border-white/10 shadow-2xl rounded-[2rem] overflow-hidden">
          <CardHeader className="text-center pt-8 pb-4">
            <div className="w-16 h-16 bg-gradient-to-br from-primary to-purple-600 rounded-2xl mx-auto mb-6 flex items-center justify-center shadow-lg shadow-primary/20 rotate-3 group-hover:rotate-0 transition-transform">
              <span className="text-2xl font-black text-white">Q</span>
            </div>
            <CardTitle className="text-4xl font-black tracking-tight bg-gradient-to-br from-slate-900 to-slate-700 dark:from-white dark:to-slate-400 bg-clip-text text-transparent">
              QuitTraq
            </CardTitle>
            <CardDescription className="text-base font-medium mt-2">
              Your companion to a smoke-free life
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6 pb-8">
            {/* OAuth Providers */}
            <div className="space-y-3">
              <Button
                variant="outline"
                className="w-full h-14 text-base font-bold rounded-xl border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800/50 hover:scale-[1.02] transition-all shadow-sm"
                onClick={() => handleLogin('GoogleOAuth')}
              >
                <svg className="mr-3 h-5 w-5" 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>
                Continue with Google
              </Button>

              <Button
                variant="outline"
                className="w-full h-14 text-base font-bold rounded-xl border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800/50 hover:scale-[1.02] transition-all shadow-sm"
                onClick={() => handleLogin('AppleOAuth')}
              >
                <svg className="mr-3 h-5 w-5" viewBox="0 0 24 24" fill="currentColor">
                  <path d="M18.71 19.5c-.83 1.24-1.71 2.45-3.05 2.47-1.34.03-1.77-.79-3.29-.79-1.53 0-2 .77-3.27.82-1.31.05-2.3-1.32-3.14-2.53C4.25 17 2.94 12.45 4.7 9.39c.87-1.52 2.43-2.48 4.12-2.51 1.28-.02 2.5.87 3.29.87.78 0 2.26-1.07 3.81-.91.65.03 2.47.26 3.64 1.98-.09.06-2.17 1.28-2.15 3.81.03 3.02 2.65 4.03 2.68 4.04-.03.07-.42 1.44-1.38 2.83M13 3.5c.73-.83 1.94-1.46 2.94-1.5.13 1.17-.34 2.35-1.04 3.19-.69.85-1.83 1.51-2.95 1.42-.15-1.15.41-2.35 1.05-3.11z" />
                </svg>
                Continue with Apple
              </Button>

              <Button
                variant="outline"
                className="w-full h-14 text-base font-bold rounded-xl border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800/50 hover:scale-[1.02] transition-all shadow-sm"
                onClick={() => handleLogin('GitHubOAuth')}
              >
                <svg className="mr-3 h-5 w-5" viewBox="0 0 24 24" fill="currentColor">
                  <path d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z" />
                </svg>
                Continue with GitHub
              </Button>
            </div>

            {/* Divider */}
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <div className="w-full border-t border-slate-200 dark:border-slate-700" />
              </div>
              <div className="relative flex justify-center text-xs uppercase">
                <span className="bg-white dark:bg-slate-900 px-3 text-slate-400 font-bold tracking-widest">or</span>
              </div>
            </div>

            {/* Email & Phone Options */}
            <div className="space-y-3">
              <Button
                variant="outline"
                className="w-full h-14 text-base font-bold rounded-xl border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800/50 hover:scale-[1.02] transition-all shadow-sm"
                onClick={() => handleLogin('authkit')}
              >
                <Mail className="mr-3 h-5 w-5" />
                Continue with Email
              </Button>

              <Button
                variant="outline"
                className="w-full h-14 text-base font-bold rounded-xl border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800/50 hover:scale-[1.02] transition-all shadow-sm"
                onClick={() => handleLogin('authkit')}
              >
                <Phone className="mr-3 h-5 w-5" />
                Continue with Phone
              </Button>
            </div>

            <div className="flex items-center space-x-3 bg-slate-50 dark:bg-slate-800/50 p-3 rounded-xl border border-slate-100 dark:border-slate-700/50">
              <Checkbox
                id="stayLoggedIn"
                checked={stayLoggedIn}
                onCheckedChange={(checked) => setStayLoggedIn(checked === true)}
                className="w-5 h-5 rounded-md border-slate-300 dark:border-slate-700"
              />
              <Label htmlFor="stayLoggedIn" className="text-sm font-medium cursor-pointer select-none opacity-80">
                Keep me logged in on this device
              </Label>
            </div>

            <div className="pt-2">
              <p className="text-center text-[10px] uppercase font-bold tracking-widest text-slate-400 dark:text-slate-500 leading-relaxed max-w-[200px] mx-auto">
                By continuing, you agree to our Terms & Privacy Policy
              </p>
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}
