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"use client";

import { useState } from "react";
import { cn } from "@/lib/utils";

type AuthMode = "login" | "register" | "forgot-password";

export function AuthForms() {
  const [mode, setMode] = useState<AuthMode>("login");
  const [showPassword, setShowPassword] = useState(false);

  return (
    <div className="min-h-screen flex items-center justify-center bg-slate-100 dark:bg-slate-950 p-4">
      <div className="w-full max-w-md">
        {/* Logo */}
        <div className="text-center mb-8">
          <div className="inline-flex items-center justify-center w-12 h-12 bg-purple-600 rounded-xl mb-4">
            <LogoIcon />
          </div>
          <h1 className="text-2xl font-bold text-slate-900 dark:text-white">
            {mode === "login" && "Welcome back"}
            {mode === "register" && "Create an account"}
            {mode === "forgot-password" && "Reset password"}
          </h1>
          <p className="text-slate-500 mt-2">
            {mode === "login" && "Sign in to your account to continue"}
            {mode === "register" && "Start your 14-day free trial"}
            {mode === "forgot-password" && "We'll send you a reset link"}
          </p>
        </div>

        {/* Form Card */}
        <div className="bg-white dark:bg-slate-900 rounded-2xl border border-slate-200 dark:border-slate-800 p-8 shadow-xl shadow-slate-200/50 dark:shadow-slate-950/50">
          {/* Social Login */}
          {mode !== "forgot-password" && (
            <>
              <div className="grid grid-cols-2 gap-3 mb-6">
                <button className="flex items-center justify-center gap-2 px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl hover:bg-slate-50 dark:hover:bg-slate-800 transition-colors">
                  <GoogleIcon />
                  <span className="text-sm font-medium text-slate-700 dark:text-slate-300">Google</span>
                </button>
                <button className="flex items-center justify-center gap-2 px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl hover:bg-slate-50 dark:hover:bg-slate-800 transition-colors">
                  <GitHubIcon />
                  <span className="text-sm font-medium text-slate-700 dark:text-slate-300">GitHub</span>
                </button>
              </div>

              <div className="relative mb-6">
                <div className="absolute inset-0 flex items-center">
                  <div className="w-full border-t border-slate-200 dark:border-slate-800" />
                </div>
                <div className="relative flex justify-center text-sm">
                  <span className="px-4 bg-white dark:bg-slate-900 text-slate-500">or continue with</span>
                </div>
              </div>
            </>
          )}

          {/* Form */}
          <form className="space-y-4">
            {mode === "register" && (
              <div>
                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1.5">Full Name</label>
                <input
                  type="text"
                  placeholder="John Doe"
                  className="w-full px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl bg-transparent focus:outline-none focus:ring-2 focus:ring-purple-500 text-slate-900 dark:text-white placeholder-slate-400"
                />
              </div>
            )}

            <div>
              <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1.5">Email</label>
              <input
                type="email"
                placeholder="you@example.com"
                className="w-full px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl bg-transparent focus:outline-none focus:ring-2 focus:ring-purple-500 text-slate-900 dark:text-white placeholder-slate-400"
              />
            </div>

            {mode !== "forgot-password" && (
              <div>
                <div className="flex items-center justify-between mb-1.5">
                  <label className="block text-sm font-medium text-slate-700 dark:text-slate-300">Password</label>
                  {mode === "login" && (
                    <button type="button" onClick={() => setMode("forgot-password")} className="text-sm text-purple-600 hover:text-purple-700">
                      Forgot password?
                    </button>
                  )}
                </div>
                <div className="relative">
                  <input
                    type={showPassword ? "text" : "password"}
                    placeholder="••••••••"
                    className="w-full px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl bg-transparent focus:outline-none focus:ring-2 focus:ring-purple-500 text-slate-900 dark:text-white placeholder-slate-400 pr-10"
                  />
                  <button
                    type="button"
                    onClick={() => setShowPassword(!showPassword)}
                    className="absolute right-3 top-1/2 -translate-y-1/2 text-slate-400 hover:text-slate-600"
                  >
                    {showPassword ? <EyeOffIcon /> : <EyeIcon />}
                  </button>
                </div>
              </div>
            )}

            {mode === "register" && (
              <div>
                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1.5">Confirm Password</label>
                <input
                  type="password"
                  placeholder="••••••••"
                  className="w-full px-4 py-2.5 border border-slate-200 dark:border-slate-700 rounded-xl bg-transparent focus:outline-none focus:ring-2 focus:ring-purple-500 text-slate-900 dark:text-white placeholder-slate-400"
                />
              </div>
            )}

            {mode === "register" && (
              <label className="flex items-start gap-2">
                <input type="checkbox" className="mt-1 rounded border-slate-300 text-purple-600 focus:ring-purple-500" />
                <span className="text-sm text-slate-600 dark:text-slate-400">
                  I agree to the <a href="#" className="text-purple-600 hover:underline">Terms of Service</a> and <a href="#" className="text-purple-600 hover:underline">Privacy Policy</a>
                </span>
              </label>
            )}

            <button
              type="submit"
              className="w-full py-3 bg-purple-600 hover:bg-purple-700 text-white font-semibold rounded-xl transition-colors"
            >
              {mode === "login" && "Sign in"}
              {mode === "register" && "Create account"}
              {mode === "forgot-password" && "Send reset link"}
            </button>
          </form>

          {/* Mode Switch */}
          <p className="text-center mt-6 text-sm text-slate-600 dark:text-slate-400">
            {mode === "login" && (
              <>Don't have an account? <button onClick={() => setMode("register")} className="text-purple-600 hover:underline font-medium">Sign up</button></>
            )}
            {mode === "register" && (
              <>Already have an account? <button onClick={() => setMode("login")} className="text-purple-600 hover:underline font-medium">Sign in</button></>
            )}
            {mode === "forgot-password" && (
              <>Remember your password? <button onClick={() => setMode("login")} className="text-purple-600 hover:underline font-medium">Sign in</button></>
            )}
          </p>
        </div>

        {/* Footer */}
        <p className="text-center mt-8 text-xs text-slate-500">
          Secured by enterprise-grade encryption
        </p>
      </div>
    </div>
  );
}

function LogoIcon() { return <svg className="w-6 h-6 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 10V3L4 14h7v7l9-11h-7z" /></svg>; }
function GoogleIcon() { return <svg className="w-5 h-5" viewBox="0 0 24 24"><path fill="#4285F4" 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="#34A853" 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="#FBBC05" 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="#EA4335" 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>; }
function GitHubIcon() { return <svg className="w-5 h-5 text-slate-700 dark:text-slate-300" fill="currentColor" viewBox="0 0 24 24"><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>; }
function EyeIcon() { return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" /><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" /></svg>; }
function EyeOffIcon() { return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.88 9.88l-3.29-3.29m7.532 7.532l3.29 3.29M3 3l3.59 3.59m0 0A9.953 9.953 0 0112 5c4.478 0 8.268 2.943 9.543 7a10.025 10.025 0 01-4.132 5.411m0 0L21 21" /></svg>; }