'use client'

import { useState } from 'react'
import Link from 'next/link'
import { useRouter } from 'next/navigation'
import { useAuth } from '@/contexts/AuthContext'

export default function LoginPage() {
  const router = useRouter()
  const { login } = useAuth()
  const [email, setEmail] = useState(
    process.env.NODE_ENV === 'development' ? 'john@mail.com' : ''
  )
  const [password, setPassword] = useState(
    process.env.NODE_ENV === 'development' ? '1qaz@WSX' : ''
  )
  const [rememberMe, setRememberMe] = useState(false)
  const [loading, setLoading] = useState(false)
  const [error, setError] = useState('')

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

    const result = await login(email, password)

    if (result.success) {
      router.push('/dashboard')
    } else {
      setError(result.error || '登入失敗')
    }

    setLoading(false)
  }

  const handleGoogleLogin = () => {
    // Mock Google login
    setLoading(true)
    setTimeout(() => {
      router.push('/dashboard')
    }, 1000)
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-blue-50 to-indigo-100 flex items-center justify-center px-4">
      <div className="max-w-md w-full bg-white rounded-2xl shadow-xl p-8">
        <div className="text-center mb-8">
          <h1 className="text-3xl font-bold text-gray-900">歡迎回來</h1>
          <p className="text-gray-600 mt-2">登入您的 DramaLing 帳號</p>
          {process.env.NODE_ENV === 'development' && (
            <div className="mt-4 p-2 bg-yellow-100 border border-yellow-300 rounded-lg">
              <p className="text-yellow-800 text-xs">
                🚧 開發模式 - 測試資料已自動填入
              </p>
            </div>
          )}
        </div>

        <form onSubmit={handleSubmit} className="space-y-6">
          {error && (
            <div className="bg-red-50 border border-red-200 rounded-lg p-4">
              <p className="text-red-600 text-sm">{error}</p>
            </div>
          )}

          <div>
            <label htmlFor="email" className="block text-sm font-medium text-gray-700 mb-2">
              Email
            </label>
            <input
              id="email"
              type="email"
              required
              value={email}
              onChange={(e) => setEmail(e.target.value)}
              className="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-primary focus:border-transparent outline-none transition"
              placeholder="your@email.com"
            />
          </div>

          <div>
            <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-2">
              密碼
            </label>
            <input
              id="password"
              type="password"
              required
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full px-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-primary focus:border-transparent outline-none transition"
              placeholder="••••••••"
            />
          </div>

          <div className="flex items-center justify-between">
            <label className="flex items-center">
              <input
                type="checkbox"
                checked={rememberMe}
                onChange={(e) => setRememberMe(e.target.checked)}
                className="h-4 w-4 text-primary focus:ring-primary border-gray-300 rounded"
              />
              <span className="ml-2 text-sm text-gray-600">記住我</span>
            </label>
            <Link href="/forgot-password" className="text-sm text-primary hover:text-primary-hover">
              忘記密碼？
            </Link>
          </div>

          <button
            type="submit"
            disabled={loading}
            className="w-full bg-primary text-white py-3 rounded-lg font-semibold hover:bg-primary-hover transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
          >
            {loading ? '登入中...' : '登入'}
          </button>
        </form>

        <div className="mt-6">
          <div className="relative">
            <div className="absolute inset-0 flex items-center">
              <div className="w-full border-t border-gray-300"></div>
            </div>
            <div className="relative flex justify-center text-sm">
              <span className="px-2 bg-white text-gray-500">或</span>
            </div>
          </div>

          <button
            onClick={handleGoogleLogin}
            disabled={loading}
            className="mt-4 w-full flex items-center justify-center px-4 py-3 border border-gray-300 rounded-lg shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
          >
            <svg className="w-5 h-5 mr-2" 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>
            使用 Google 登入
          </button>
        </div>

        <p className="mt-8 text-center text-sm text-gray-600">
          還沒有帳號？{' '}
          <Link href="/register" className="font-medium text-primary hover:text-primary-hover">
            立即註冊
          </Link>
        </p>
      </div>
    </div>
  )
}