'use client';

import { useState, FormEvent } from 'react';
import { useRouter } from 'next/navigation';
import { Lock, User, Loader2 } from 'lucide-react';
import { motion } from 'framer-motion';
import Image from 'next/image';

export default function AdminLogin() {
  const router = useRouter();
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const [isLoading, setIsLoading] = useState(false);

  const handleSubmit = async (e: FormEvent) => {
    e.preventDefault();
    setError('');
    setIsLoading(true);

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

      const data = await response.json();

      if (!response.ok) {
        setError(data.error || 'Login failed');
        setIsLoading(false);
        return;
      }

      // Successful login - redirect to dashboard
      router.push('/admin/dashboard');
    } catch (err) {
      setError('Network error. Please try again.');
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen w-full flex items-center justify-center p-4 relative overflow-hidden">
      {/* Monaco Background Image */}
      <div
        className="absolute inset-0 w-full h-full bg-cover bg-center"
        style={{
          backgroundImage: 'url(/monaco_high_res.jpg)',
          filter: 'brightness(0.6) contrast(1.1)'
        }}
      />

      {/* Overlay gradient for better readability */}
      <div className="absolute inset-0 bg-gradient-to-b from-black/50 via-black/30 to-black/50" />

      <motion.div
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
        transition={{ duration: 0.5 }}
        className="relative w-full max-w-md z-10"
      >
        {/* Logo and Title */}
        <div className="text-center mb-8">
          <motion.div
            initial={{ scale: 0.8, opacity: 0 }}
            animate={{ scale: 1, opacity: 1 }}
            transition={{ delay: 0.2, duration: 0.5 }}
            className="flex justify-center mb-4"
          >
            <div className="w-20 h-20 bg-white rounded-full flex items-center justify-center shadow-lg p-2">
              <Image
                src="/puffinOffset.png"
                alt="Puffin Offset Logo"
                width={64}
                height={64}
                className="object-contain"
              />
            </div>
          </motion.div>
          <motion.h1
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            transition={{ delay: 0.3, duration: 0.5 }}
            className="text-3xl font-bold mb-2 text-off-white"
          >
            Admin Portal
          </motion.h1>
          <motion.p
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            transition={{ delay: 0.4, duration: 0.5 }}
            className="font-medium text-off-white/80"
          >
            Puffin Offset Management
          </motion.p>
        </div>

        {/* Login Card */}
        <motion.div
          initial={{ opacity: 0, scale: 0.95 }}
          animate={{ opacity: 1, scale: 1 }}
          transition={{ delay: 0.5, duration: 0.5 }}
          className="bg-white border border-light-gray-border rounded-xl p-8 shadow-2xl"
        >
          <form onSubmit={handleSubmit} className="space-y-6">
            {/* Error Message */}
            {error && (
              <motion.div
                initial={{ opacity: 0, y: -10 }}
                animate={{ opacity: 1, y: 0 }}
                className="bg-red-900/30 border border-red-800/60 rounded-lg p-3 text-red-100 text-sm"
              >
                {error}
              </motion.div>
            )}

            {/* Username Field */}
            <div>
              <label htmlFor="username" className="block text-sm font-medium text-deep-sea-blue mb-2">
                Username
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <User className="h-5 w-5 text-deep-sea-blue/60" />
                </div>
                <input
                  id="username"
                  type="text"
                  value={username}
                  onChange={(e) => setUsername(e.target.value)}
                  className="w-full pl-10 pr-4 py-3 bg-white border border-light-gray-border rounded-lg text-deep-sea-blue placeholder-deep-sea-blue/40 focus:outline-none focus:ring-2 focus:ring-deep-sea-blue/50 focus:border-deep-sea-blue transition-all"
                  placeholder="Enter your username"
                  required
                  disabled={isLoading}
                />
              </div>
            </div>

            {/* Password Field */}
            <div>
              <label htmlFor="password" className="block text-sm font-medium text-deep-sea-blue mb-2">
                Password
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <Lock className="h-5 w-5 text-deep-sea-blue/60" />
                </div>
                <input
                  id="password"
                  type="password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  className="w-full pl-10 pr-4 py-3 bg-white border border-light-gray-border rounded-lg text-deep-sea-blue placeholder-deep-sea-blue/40 focus:outline-none focus:ring-2 focus:ring-deep-sea-blue/50 focus:border-deep-sea-blue transition-all"
                  placeholder="Enter your password"
                  required
                  disabled={isLoading}
                />
              </div>
            </div>

            {/* Submit Button */}
            <motion.button
              type="submit"
              disabled={isLoading}
              whileHover={{ scale: isLoading ? 1 : 1.02 }}
              whileTap={{ scale: isLoading ? 1 : 0.98 }}
              className={`w-full py-3 px-4 rounded-lg font-semibold text-white shadow-lg transition-all ${
                isLoading
                  ? 'bg-deep-sea-blue/50 cursor-not-allowed'
                  : 'bg-deep-sea-blue hover:bg-deep-sea-blue/90'
              }`}
            >
              {isLoading ? (
                <span className="flex items-center justify-center">
                  <Loader2 className="animate-spin mr-2" size={20} />
                  Signing in...
                </span>
              ) : (
                'Sign In'
              )}
            </motion.button>
          </form>
        </motion.div>

        {/* Footer */}
        <motion.p
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{ delay: 0.6, duration: 0.5 }}
          className="text-center mt-6 text-sm font-medium text-off-white/70"
        >
          © 2024 Puffin Offset. Secure admin access.
        </motion.p>
      </motion.div>
    </div>
  );
}