import { Helmet } from 'react-helmet-async'
import { useState } from 'react'
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 { submitSupport } from '@/lib/api'
import { useDebounce } from '@/hooks/useDebounce'
import { AlertCircle, ArrowRight, CheckCircle2, Clock3, ExternalLink, Headphones, LifeBuoy, ShieldCheck, TicketCheck, Wrench } from 'lucide-react'

const portalLinks = [
  {
    label: 'Sign in',
    href: 'https://queuenorthtechnologiesllc.zohodesk.com/portal/en/signin',
  },
  {
    label: 'Create account',
    href: 'https://queuenorthtechnologiesllc.zohodesk.com/portal/en/signup',
  },
]

const responseTargets = [
  { priority: 'Low', context: 'General request', target: '24 hours' },
  { priority: 'Medium', context: 'Standard issue', target: '4 hours' },
  { priority: 'High', context: 'Critical outage', target: '1 hour' },
]

const supportedSystems = [
  '8x8 Communications Platform',
  'VoIP Phone Systems',
  'Contact Center Solutions',
  'Network Infrastructure',
  'Cloud Migration Support',
]

const Support = () => {
  const [formState, setFormState] = useState({
    name: '',
    company: '',
    email: '',
    phone: '',
    issue: '',
    priority: 'medium',
    company_website: '', // Honeypot field - hidden from humans, bots will fill it
  })
  const [errors, setErrors] = useState({
    name: '',
    company: '',
    email: '',
    issue: '',
  })
  // Debounce validation errors so they don't flash on every keystroke
  const debouncedErrors = useDebounce(errors, 300)
  const [isSubmitting, setIsSubmitting] = useState(false)

  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() && 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
    handleSubmitForm()
  }

  const handleSubmitForm = async () => {
    setIsSubmitting(true)
    try {
      await submitSupport(formState)
      toast.success("Thanks! We\'ll get back to you soon.")
      setFormState({
        name: '',
        company: '',
        email: '',
        phone: '',
        issue: '',
        priority: 'medium',
        company_website: '',
      })
      setErrors({
        name: '',
        company: '',
        email: '',
        issue: '',
      })
    } catch (error) {
      toast.error(error.message || 'Failed to submit form. Please try again.')
    } finally {
      setIsSubmitting(false)
    }
  }

  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 (
    <>
      <Helmet>
        <title>IT Support & Help Desk | Queue North Technologies</title>
        <meta name="description" content="Get IT support and help desk services from Queue North Technologies. 24/7 monitoring, rapid response SLAs, and dedicated support engineers for your business." />
        <meta property="og:title" content="IT Support & Help Desk | Queue North Technologies" />
        <meta property="og:description" content="24/7 IT support and help desk services. Rapid response SLAs, dedicated support engineers." />
        <meta property="og:url" content="https://queuenorth.com/support" />
        <meta property="og:type" content="website" />
        <meta property="og:image" content="https://queuenorth.com/assets/og-image.png" />
        <meta property="og:site_name" content="Queue North Technologies" />
      </Helmet>
      {/* Page Hero */}
      <section className="bg-primary-navy py-16 lg:py-20 text-white">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="grid grid-cols-1 lg:grid-cols-[1fr_0.72fr] gap-10 lg:gap-14 items-center">
            <div>
              <div className="inline-flex items-center gap-2 rounded-md border border-white/20 bg-white/10 px-3 py-2 text-xs font-semibold uppercase tracking-wide text-primary-cyan">
                <LifeBuoy className="h-4 w-4" aria-hidden="true" />
                Queue North Support
              </div>
              <h1 className="mt-6 text-4xl md:text-5xl lg:text-6xl font-bold leading-tight">
                Get help without getting handed off.
              </h1>
              <p className="mt-6 text-lg md:text-xl text-white/75 max-w-2xl leading-relaxed">
                Open a support request, access the client portal, or escalate a service-impacting issue through one clear path.
              </p>
              <div className="mt-8 flex flex-col sm:flex-row gap-3">
                <a href="#support-request" className="inline-flex h-11 items-center justify-center gap-2 rounded-md bg-white px-5 text-sm font-semibold text-primary-navy hover:bg-section-alt transition-colors">
                  Submit Request
                  <ArrowRight className="h-4 w-4" aria-hidden="true" />
                </a>
                <a
                  href={portalLinks[0].href}
                  target="_blank"
                  rel="noopener noreferrer"
                  className="inline-flex h-11 items-center justify-center gap-2 rounded-md border border-white/40 px-5 text-sm font-semibold text-white hover:bg-white/10 transition-colors"
                >
                  Open Portal
                  <ExternalLink className="h-4 w-4" aria-hidden="true" />
                </a>
              </div>
            </div>

            <div className="rounded-md border border-white/15 bg-white/10 p-6 shadow-xl backdrop-blur">
              <h2 className="text-lg font-semibold mb-5">Choose the right path</h2>
              <div className="space-y-4">
                <div className="flex gap-4">
                  <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-md bg-white/10 text-primary-cyan">
                    <TicketCheck className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <div>
                    <h3 className="font-semibold">Existing client</h3>
                    <p className="text-sm text-white/70">Submit the form or use the portal to track requests.</p>
                  </div>
                </div>
                <div className="flex gap-4">
                  <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-md bg-white/10 text-primary-cyan">
                    <AlertCircle className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <div>
                    <h3 className="font-semibold">Active outage</h3>
                    <a href="tel:+13217308020" className="text-sm font-semibold text-primary-cyan hover:text-white transition-colors" aria-label="Call Queue North support">
                      Call (321) 730-8020
                    </a>
                  </div>
                </div>
                <div className="flex gap-4">
                  <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-md bg-white/10 text-primary-cyan">
                    <Wrench className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <div>
                    <h3 className="font-semibold">Planned work</h3>
                    <p className="text-sm text-white/70">Use the request form for moves, adds, changes, and deployments.</p>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </section>

      {/* Support Form */}
      <section id="support-request" className="bg-background py-16 lg:py-20">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="grid grid-cols-1 lg:grid-cols-[0.9fr_1.1fr] gap-8 lg:gap-10 items-start">
            {/* Left - Info — order 2 on mobile so form appears first */}
            <div className="order-2 lg:order-1 space-y-6">
              <div className="rounded-md border border-border bg-white p-6 shadow-sm">
                <div className="flex items-start gap-4">
                  <span className="flex h-11 w-11 shrink-0 items-center justify-center rounded-md bg-primary-navy text-white">
                    <Headphones className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <div>
                    <h2 className="text-xl font-bold text-primary-navy">Support Center</h2>
                    <p className="mt-2 text-sm leading-relaxed text-soft-text">
                      Sign in to manage existing tickets, create an account, or submit the form on this page for a new request.
                    </p>
                  </div>
                </div>

                <div className="mt-6 flex flex-col sm:flex-row gap-3">
                  {portalLinks.map((link, index) => (
                    <a
                      key={link.label}
                      href={link.href}
                      target="_blank"
                      rel="noopener noreferrer"
                      className={`inline-flex h-10 items-center justify-center gap-2 rounded-md px-4 text-sm font-semibold transition-colors ${index === 0 ? 'bg-primary-navy text-white hover:bg-primary-navy-dark' : 'border border-border bg-white text-primary-navy hover:bg-section-alt'}`}
                    >
                      {link.label}
                      <ExternalLink className="h-4 w-4" aria-hidden="true" />
                    </a>
                  ))}
                </div>
              </div>

              <div className="rounded-md border border-border bg-white p-6 shadow-sm">
                <div className="flex items-center gap-3 mb-5">
                  <span className="flex h-10 w-10 items-center justify-center rounded-md bg-section-alt text-primary-navy">
                    <Clock3 className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <h2 className="text-xl font-bold text-primary-navy">Response Targets</h2>
                </div>
                <div className="grid gap-3 sm:grid-cols-3 lg:grid-cols-1">
                  {responseTargets.map((item) => (
                    <div key={item.priority} className="rounded-md border border-border bg-background p-4">
                      <div className="flex items-center justify-between gap-3">
                        <p className="font-semibold text-text">{item.priority}</p>
                        <p className="font-numeric text-xl text-primary-navy">{item.target}</p>
                      </div>
                      <p className="mt-1 text-sm text-soft-text">{item.context}</p>
                    </div>
                  ))}
                </div>
              </div>

              <div className="rounded-md border border-border bg-section-alt p-6">
                <div className="flex items-center gap-3 mb-5">
                  <span className="flex h-10 w-10 items-center justify-center rounded-md bg-white text-primary-navy">
                    <ShieldCheck className="h-5 w-5" aria-hidden="true" />
                  </span>
                  <h2 className="text-xl font-bold text-primary-navy">Covered Systems</h2>
                </div>
                <ul className="space-y-3">
                  {supportedSystems.map((item) => (
                    <li key={item} className="flex items-center gap-3 text-sm text-text">
                      <CheckCircle2 className="h-5 w-5 shrink-0 text-primary-blue" aria-hidden="true" />
                      {item}
                    </li>
                  ))}
                </ul>
              </div>
            </div>

            {/* Right - Form — order 1 on mobile so it appears first */}
            <div className="order-1 lg:order-2">
              <form onSubmit={handleSubmit} noValidate className={`rounded-md border border-border bg-white p-6 shadow-sm lg:p-8 space-y-5 ${isSubmitting ? 'opacity-70 pointer-events-none' : ''}`}>
                <div className="border-b border-border pb-5">
                  <h2 className="text-2xl font-bold text-primary-navy">Submit a Request</h2>
                  <p className="mt-2 text-sm text-soft-text">
                    Include who is affected, what changed, and how urgent the issue is.
                  </p>
                </div>

                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <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' : ''}
                    />
                    {debouncedErrors.name && (
                      <p className="text-xs text-red-600 mt-1">{debouncedErrors.name}</p>
                    )}
                  </div>

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

                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <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="you@example.com"
                      className={errors.email ? 'border-red-500 focus-visible:ring-red-500' : ''}
                    />
                    {debouncedErrors.email && (
                      <p className="text-xs text-red-600 mt-1">{debouncedErrors.email}</p>
                    )}
                  </div>

                  <div>
                    <label htmlFor="phone" className="block text-sm font-medium text-text mb-2">
                      Phone <span className="text-soft-text">(optional)</span>
                    </label>
                    <Input
                      type="tel"
                      id="phone"
                      name="phone"
                      value={formState.phone}
                      onChange={handleChange}
                      placeholder="(555) 123-4567"
                    />
                  </div>
                </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">
                    Issue Details <span className="text-red-600">*</span>
                  </label>
                  <Textarea
                    id="issue"
                    name="issue"
                    value={formState.issue}
                    onChange={handleChange}
                    required
                    placeholder="What changed, who is affected, and what have you already tried?"
                    className={`w-full rounded-md border bg-background px-3 py-2 text-sm ring-offset-[#F8FAFC] placeholder:text-muted focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary-navy focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 ${errors.issue ? 'border-red-500 focus-visible:ring-red-500' : ''}`}
                    rows={5}
                  />
                  {debouncedErrors.issue && (
                    <p className="text-xs text-red-600 mt-1">{debouncedErrors.issue}</p>
                  )}
                </div>

                <div className="absolute opacity-0 h-0 overflow-hidden" aria-hidden="true">
                  <input
                    type="text"
                    name="company_website"
                    tabIndex="-1"
                    autoComplete="off"
                    value={formState.company_website}
                    onChange={handleChange}
                  />
                </div>

                <Button
                  type="submit"
                  className="w-full gap-2"
                  disabled={isSubmitting}
                >
                  {isSubmitting ? (
                    <>
                      <svg className="animate-spin -ml-1 mr-2 h-4 w-4" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                        <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
                        <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z" />
                      </svg>
                      Submitting...
                    </>
                  ) : (
                    <>
                      Submit Request
                      <ArrowRight className="h-4 w-4" aria-hidden="true" />
                    </>
                  )}
                </Button>
              </form>
            </div>
          </div>
        </div>
      </section>
    </>
  )
}

export default Support