'use client'

import { useState } from 'react'

type FormState = 'idle' | 'loading' | 'success' | 'error'

const T = {
  bg:         '#f3f2f2',
  surface:    '#eae9e9',
  text:       '#201f1d',
  divider:    'rgba(32,31,29,0.16)',
  accent:     '#b68235',
  accentDark: '#7d5411',
  fontHead:   '"Sora", sans-serif',
  fontBody:   '"Inter", sans-serif',
  radiusMd:   '4px',
  radiusLg:   '7px',
}

export default function ContactForm() {
  const [state, setState] = useState<FormState>('idle')
  const [form, setForm] = useState({ name: '', org: '', email: '', phone: '', _hp: '' })

  const set = (k: keyof typeof form) => (e: React.ChangeEvent<HTMLInputElement>) =>
    setForm(p => ({ ...p, [k]: e.target.value }))

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()
    if (form._hp) return
    setState('loading')
    try {
      const res = await fetch('/api/contact', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ name: form.name, email: form.email, barNo: form.org, message: form.phone }),
      })
      setState(res.ok ? 'success' : 'error')
    } catch {
      setState('error')
    }
  }

  /* Success */
  if (state === 'success') {
    return (
      <div style={{ border: `1px solid ${T.divider}`, borderRadius: T.radiusLg, padding: '40px', textAlign: 'center', background: T.surface }}>
        <h3 style={{ fontFamily: T.fontHead, fontWeight: 400, fontSize: '22px', margin: '0 0 8px' }}>Talebiniz alındı.</h3>
        <p style={{ fontSize: '14.5px', margin: 0, color: 'rgba(32,31,29,0.78)', fontFamily: T.fontBody }}>
          Kurucu ekipten kısa süre içinde size dönüş yapılacak.
        </p>
      </div>
    )
  }

  const inputStyle: React.CSSProperties = {
    width: '100%', minHeight: '36px', padding: '6px 10px',
    fontFamily: T.fontBody, fontSize: '14px', color: T.text,
    background: 'transparent',
    border: `1px solid ${T.divider}`, borderRadius: T.radiusMd,
    transition: 'border-color .15s',
    boxSizing: 'border-box',
  }

  const labelStyle: React.CSSProperties = {
    display: 'block', fontSize: '12px', marginBottom: '5px',
    color: 'rgba(32,31,29,0.7)', fontFamily: T.fontBody,
  }

  return (
    <form
      onSubmit={handleSubmit}
      style={{
        display: 'grid',
        gridTemplateColumns: 'repeat(auto-fit,minmax(200px,1fr))',
        gap: '16px',
        border: `1px solid ${T.divider}`,
        borderRadius: T.radiusLg,
        padding: '28px',
        background: T.bg,
      }}
      noValidate
    >
      {/* Honeypot */}
      <div aria-hidden="true" style={{ display: 'none' }} tabIndex={-1}>
        <input type="text" name="_hp" value={form._hp} onChange={set('_hp')} autoComplete="off" tabIndex={-1} />
      </div>

      <div style={{ gridColumn: 'span 1' }}>
        <label style={labelStyle} htmlFor="af_name">Ad Soyad <span style={{ color: T.accent }}>*</span></label>
        <input
          id="af_name" type="text" required
          placeholder="Av. Ayşe Yılmaz"
          value={form.name} onChange={set('name')}
          style={inputStyle}
          onFocus={e => (e.target.style.borderColor = T.accent)}
          onBlur={e => (e.target.style.borderColor = T.divider)}
        />
      </div>

      <div>
        <label style={labelStyle} htmlFor="af_org">Büro / Kurum</label>
        <input
          id="af_org" type="text"
          placeholder="Yılmaz Hukuk Bürosu"
          value={form.org} onChange={set('org')}
          style={inputStyle}
          onFocus={e => (e.target.style.borderColor = T.accent)}
          onBlur={e => (e.target.style.borderColor = T.divider)}
        />
      </div>

      <div>
        <label style={labelStyle} htmlFor="af_email">E-posta <span style={{ color: T.accent }}>*</span></label>
        <input
          id="af_email" type="email" required
          placeholder="ayse@buro.com"
          value={form.email} onChange={set('email')}
          style={inputStyle}
          onFocus={e => (e.target.style.borderColor = T.accent)}
          onBlur={e => (e.target.style.borderColor = T.divider)}
        />
      </div>

      <div>
        <label style={labelStyle} htmlFor="af_phone">Telefon</label>
        <input
          id="af_phone" type="tel"
          placeholder="0532 000 00 00"
          value={form.phone} onChange={set('phone')}
          style={inputStyle}
          onFocus={e => (e.target.style.borderColor = T.accent)}
          onBlur={e => (e.target.style.borderColor = T.divider)}
        />
      </div>

      {state === 'error' && (
        <div style={{ gridColumn: '1 / -1', fontSize: '13px', color: '#c0392b', fontFamily: T.fontBody }}>
          Bir hata oluştu. Lütfen tekrar deneyin veya{' '}
          <a href="mailto:info@ayris.tech" style={{ color: T.accent }}>info@ayris.tech</a> adresine yazın.
        </div>
      )}

      <button
        id="contact_submit"
        type="submit"
        disabled={state === 'loading'}
        style={{
          gridColumn: '1 / -1',
          display: 'flex', alignItems: 'center', justifyContent: 'center', gap: '6px',
          cursor: state === 'loading' ? 'not-allowed' : 'pointer',
          textDecoration: 'none',
          fontFamily: T.fontHead, fontWeight: 600, fontSize: '15px', lineHeight: 1.2,
          color: T.accent,
          background: 'transparent',
          border: `1px solid ${T.accent}`,
          padding: '12px',
          borderRadius: T.radiusMd,
          transition: 'background .15s',
          opacity: state === 'loading' ? 0.6 : 1,
          marginTop: '4px',
        }}
        onMouseEnter={e => { if (state !== 'loading') (e.currentTarget as HTMLElement).style.background = 'rgba(182,130,53,0.10)' }}
        onMouseLeave={e => { if (state !== 'loading') (e.currentTarget as HTMLElement).style.background = 'transparent' }}
      >
        {state === 'loading' ? 'Gönderiliyor…' : 'Demo Talep Et'}
      </button>
    </form>
  )
}
