frontend/src/components/Auth/Login.jsx

import React, { useState } from 'react'
import { Link, useNavigate } from 'react-router-dom'
import { motion } from 'framer-motion'
import { useAuth } from '../../hooks/useAuth'
import { LogIn, Mail, Lock, BookOpen } from 'lucide-react'
import toast from 'react-hot-toast'

const Login = () => {
  const navigate = useNavigate()
  const { login } = useAuth()
  const [formData, setFormData] = useState({
    username: '',
    email: ''
  })
  const [loading, setLoading] = useState(false)

  const handleChange = (e) => {
    setFormData({
      ...formData,
      [e.target.name]: e.target.value
    })
  }

  const handleSubmit = async (e) => {
    e.preventDefault()
    setLoading(true)
    
    try {
      await login(formData)
      navigate('/')
    } catch (error) {
      // Error handled by toast in api.js
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center p-4">
      {/* Background decoration */}
      <div className="absolute inset-0 overflow-hidden">
        <div className="absolute -top-40 -right-40 w-80 h-80 bg-primary-400 rounded-full mix-blend-multiply filter blur-3xl opacity-20 animate-pulse-slow"></div>
        <div className="absolute -bottom-40 -left-40 w-80 h-80 bg-accent-400 rounded-full mix-blend-multiply filter blur-3xl opacity-20 animate-pulse-slow" style={{ animationDelay: '1s' }}></div>
      </div>

      <motion.div
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
        transition={{ duration: 0.5 }}
        className="relative z-10 w-full max-w-md"
      >
        {/* Header */}
        <div className="text-center mb-8">
          <motion.div
            initial={{ scale: 0 }}
            animate={{ scale: 1 }}
            transition={{ delay: 0.2, type: 'spring', stiffness: 200 }}
            className="inline-flex items-center justify-center w-20 h-20 bg-gradient-to-br from-primary-500 to-accent-500 rounded-2xl mb-4 shadow-xl"
          >
            <BookOpen className="w-10 h-10 text-white" />
          </motion.div>
          <h1 className="text-4xl font-bold gradient-text mb-2">
            Welcome Back
          </h1>
          <p className="text-slate-600">
            Continue your learning journey
          </p>
        </div>

        {/* Login Form */}
        <motion.div
          initial={{ opacity: 0, scale: 0.95 }}
          animate={{ opacity: 1, scale: 1 }}
          transition={{ delay: 0.3 }}
          className="card"
        >
          <form onSubmit={handleSubmit} className="space-y-6">
            {/* Username */}
            <div>
              <label className="block text-sm font-semibold text-slate-700 mb-2">
                Username
              </label>
              <div className="relative">
                <Mail className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-400" />
                <input
                  type="text"
                  name="username"
                  value={formData.username}
                  onChange={handleChange}
                  className="input-field pl-11"
                  placeholder="Enter your username"
                  required
                />
              </div>
            </div>

            {/* Email (optional for compatibility) */}
            <div>
              <label className="block text-sm font-semibold text-slate-700 mb-2">
                Email
              </label>
              <div className="relative">
                <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-400" />
                <input
                  type="email"
                  name="email"
                  value={formData.email}
                  onChange={handleChange}
                  className="input-field pl-11"
                  placeholder="Enter your email"
                />
              </div>
            </div>

            {/* Submit Button */}
            <motion.button
              whileHover={{ scale: 1.02 }}
              whileTap={{ scale: 0.98 }}
              type="submit"
              disabled={loading}
              className="w-full btn-primary flex items-center justify-center gap-2 disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {loading ? (
                <>
                  <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div>
                  Logging in...
                </>
              ) : (
                <>
                  <LogIn className="w-5 h-5" />
                  Login
                </>
              )}
            </motion.button>
          </form>

          {/* Divider */}
          <div className="relative my-6">
            <div className="absolute inset-0 flex items-center">
              <div className="w-full border-t border-slate-200"></div>
            </div>
            <div className="relative flex justify-center text-sm">
              <span className="px-4 bg-white text-slate-500">
                Don't have an account?
              </span>
            </div>
          </div>

          {/* Register Link */}
          <Link to="/register">
            <motion.button
              whileHover={{ scale: 1.02 }}
              whileTap={{ scale: 0.98 }}
              type="button"
              className="w-full btn-secondary"
            >
              Create Account
            </motion.button>
          </Link>
        </motion.div>

        {/* Footer */}
        <motion.p
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{ delay: 0.5 }}
          className="text-center text-sm text-slate-500 mt-6"
        >
          Powered by Multi-Agent AI System
        </motion.p>
      </motion.div>
    </div>
  )
}

export default Login