import { useState } from 'react'
import { useMutation } from '@tanstack/react-query'
import { toast } from 'sonner'
import { Button } from '@/components/ui/Button'
import { Input } from '@/components/ui/Input'
import { Textarea } from '@/components/ui/Textarea'
import { Select } from '@/components/ui/Select'
import { api } from '@/lib/api'

const Support = () => {
  const [formState, setFormState] = useState({
    name: '',
    company: '',
    email: '',
    phone: '',
    issue: '',
    priority: 'medium',
  })
  const [errors, setErrors] = useState({
    name: '',
    company: '',
    email: '',
    issue: '',
  })

  const mutation = useMutation({
    mutationFn: (data) => api.post('/support', data),
    onSuccess: () => {
      toast.success('Thanks! We\'ll get back to you soon.')
      setFormState({
        name: '',
        company: '',
        email: '',
        phone: '',
        issue: '',
        priority: 'medium',
      })
      setErrors({
        name: '',
        company: '',
        email: '',
        issue: '',
      })
    },
    onError: (error) => {
      toast.error(error.message || 'Failed to submit form. Please try again.')
    },
  })

  const validateForm = () => {
    const newErrors = {
      name: '',
      company: '',
      email: '',
      issue: '',
    }

    // Validate required fields
    if (!formState.name.trim()) newErrors.name = 'Name is required'
    if (!formState.company.trim()) newErrors.company = 'Company name is required'
    if (!formState.issue.trim()) newErrors.issue = 'Please describe your issue'

    // Validate email format
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
    if (!formState.email.trim()) {
      newErrors.email = 'Email is required'
    } else if (!emailRegex.test(formState.email)) {
      newErrors.email = 'Please enter a valid email address'
    }

    // Validate issue minimum length (10 chars matches server-side Zod rule)
    if (formState.issue.trim().length < 10) {
      newErrors.issue = 'Issue description must be at least 10 characters'
    }

    const hasErrors = Object.values(newErrors).some(error => error !== '')
    setErrors(newErrors)

    if (hasErrors) {
      toast.error('Please fix the errors in the form')
      return false
    }

    return true
  }

  const handleSubmit = (e) => {
    e.preventDefault()
    if (!validateForm()) return
    mutation.mutate(formState)
  }

  const handleChange = (e) => {
    const { name, value } = e.target
    setFormState(prev => ({ ...prev, [name]: value }))
    // Clear error for this field as user types
    if (errors[name]) {
      setErrors(prev => ({ ...prev, [name]: '' }))
    }
  }

  return (
    <div className="container mx-auto px-4 py-16 md:py-24">
      {/* Page Hero */}
      <section className="mb-16">
        <h1 className="text-4xl md:text-5xl font-bold text-primary-navy mb-6">Support</h1>
        <p className="text-xl text-soft-text max-w-3xl">
          Need help with your communications or infrastructure? Submit a support request and we'll get back to you promptly.
        </p>
      </section>

      {/* Support Form */}
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-12">
        {/* Left - Info */}
        <div>
          <div className="mb-8">
            <h2 className="text-2xl font-bold text-primary-navy mb-4">Support Services</h2>
            <p className="text-soft-text mb-6">
              We provide comprehensive support for all our services, including 24/7 monitoring, rapid response, and dedicated support engineers.
            </p>
            <div className="space-y-4">
              <div>
                <h3 className="font-semibold text-text mb-2">Visit Support Center</h3>
                <a
                  href="https://queuenorth.zoho.com/"
                  target="_blank"
                  rel="noopener noreferrer"
                  className="inline-flex items-center justify-center px-4 py-2 bg-primary-navy text-white font-medium rounded-md hover:bg-navy-darker transition-colors text-sm"
                >
                  Visit Support Center
                  <svg className="ml-2 h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" />
                  </svg>
                </a>
              </div>
              <div>
                <h3 className="font-semibold text-text mb-2">Phone</h3>
                <p className="text-soft-text">(906) 482-6616</p>
              </div>
              <div>
                <h3 className="font-semibold text-text mb-2">Support Hours</h3>
                <p className="text-soft-text">24/7 Monitoring with rapid response SLAs</p>
              </div>
              <div>
                <h3 className="font-semibold text-text mb-2">Priority Levels</h3>
                <p className="text-soft-text">
                  Low: General inquiries (response within 24 hours)<br/>
                  Medium: Standard issues (response within 4 hours)<br/>
                  High: Critical issues (response within 1 hour)
                </p>
              </div>
            </div>
          </div>

          <div className="bg-section-alt rounded-lg p-6">
            <h3 className="font-semibold text-primary-navy mb-4">What We Support</h3>
            <ul className="space-y-3">
              {[
                '8x8 Communications Platform',
                'VoIP Phone Systems',
                'Contact Center Solutions',
                'Network Infrastructure',
                'Cloud Migration Support',
              ].map((item, index) => (
                <li key={index} className="flex items-center gap-3 text-text">
                  <svg className="h-5 w-5 text-primary-navy" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M5 13l4 4L19 7" />
                  </svg>
                  {item}
                </li>
              ))}
            </ul>
          </div>
        </div>

        {/* Right - Form */}
        <div>
          <form onSubmit={handleSubmit} className={`space-y-6 ${mutation.isPending ? 'opacity-70 pointer-events-none' : ''}`}>
            <div>
              <label htmlFor="name" className="block text-sm font-medium text-text mb-2">
                Name <span className="text-red-600">*</span>
              </label>
              <Input
                type="text"
                id="name"
                name="name"
                value={formState.name}
                onChange={handleChange}
                required
                placeholder="Your full name"
                className={errors.name ? 'border-red-500 focus-visible:ring-red-500' : ''}
              />
              {errors.name && (
                <p className="text-xs text-red-600 mt-1">{errors.name}</p>
              )}
            </div>

            <div>
              <label htmlFor="company" className="block text-sm font-medium text-text mb-2">
                Company Name <span className="text-red-600">*</span>
              </label>
              <Input
                type="text"
                id="company"
                name="company"
                value={formState.company}
                onChange={handleChange}
                required
                placeholder="Your company name"
                className={errors.company ? 'border-red-500 focus-visible:ring-red-500' : ''}
              />
              {errors.company && (
                <p className="text-xs text-red-600 mt-1">{errors.company}</p>
              )}
            </div>

            <div>
              <label htmlFor="email" className="block text-sm font-medium text-text mb-2">
                Email <span className="text-red-600">*</span>
              </label>
              <Input
                type="email"
                id="email"
                name="email"
                value={formState.email}
                onChange={handleChange}
                required
                placeholder="your.email@example.com"
                className={errors.email ? 'border-red-500 focus-visible:ring-red-500' : ''}
              />
              {errors.email && (
                <p className="text-xs text-red-600 mt-1">{errors.email}</p>
              )}
            </div>

            <div>
              <label htmlFor="phone" className="block text-sm font-medium text-text mb-2">
                Phone (Optional)
              </label>
              <Input
                type="tel"
                id="phone"
                name="phone"
                value={formState.phone}
                onChange={handleChange}
                placeholder="(555) 123-4567"
              />
            </div>

            <div>
              <label htmlFor="priority" className="block text-sm font-medium text-text mb-2">
                Priority <span className="text-red-600">*</span>
              </label>
              <Select
                id="priority"
                name="priority"
                value={formState.priority}
                onChange={handleChange}
              >
                <option value="low">Low - General inquiries (24 hours)</option>
                <option value="medium">Medium - Standard issues (4 hours)</option>
                <option value="high">High - Critical issues (1 hour)</option>
              </Select>
            </div>

            <div>
              <label htmlFor="issue" className="block text-sm font-medium text-text mb-2">
                Describe Your Issue <span className="text-red-600">*</span>
              </label>
              <textarea
                id="issue"
                name="issue"
                value={formState.issue}
                onChange={handleChange}
                required
                placeholder="Please describe your issue in detail..."
                rows={5}
                className={`flex min-h-[80px] w-full rounded-md border bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 ${errors.issue ? 'border-red-500 focus-visible:ring-red-500' : ''}`}
              />
              {errors.issue && (
                <p className="text-xs text-red-600 mt-1">{errors.issue}</p>
              )}
            </div>

            <Button
              type="submit"
              className="w-full"
              disabled={mutation.isPending}
            >
              {mutation.isPending ? 'Submitting...' : 'Submit Request'}
            </Button>
          </form>
        </div>
      </div>
    </div>
  )
}

export default Support