'use client'
import {
  Container,
  Card,
  CardContent,
  Typography,
  Box,
  Button,
  TextField,
  Paper,
  useTheme,
  Alert,
  Snackbar,
} from '@mui/material'
import {
  Email,
  Send,
  ContactSupport,
} from '@mui/icons-material'
import { useRouter } from 'next/navigation'
import { useTranslations, useLocale } from 'next-intl'
import { useState, useEffect } from 'react'
import RefreshIcon from '@mui/icons-material/Refresh'

export default function Contact() {
  const theme = useTheme()
  const router = useRouter()
  const t = useTranslations('contact')
  const locale = useLocale()

  const [formData, setFormData] = useState({
    name: '',
    email: '',
    subject: '',
    message: ''
  })
  const [captcha, setCaptcha] = useState<{
    id: string
    question: string
    answer: string
  }>({ id: '', question: '', answer: '' })
  const [captchaError, setCaptchaError] = useState(false)
  const [isSubmitting, setIsSubmitting] = useState(false)
  const [showSuccess, setShowSuccess] = useState(false)
  const [showError, setShowError] = useState(false)

  const loadCaptcha = async () => {
    try {
      const response = await fetch('/api/captcha')
      const data = await response.json()
      if (data.success) {
        setCaptcha({
          id: data.captchaId,
          question: data.question,
          answer: ''
        })
        setCaptchaError(false)
      }
    } catch (error) {
      console.error('Failed to load captcha:', error)
    }
  }

  useEffect(() => {
    loadCaptcha()
  }, [])

  const handleInputChange = (field: string) => (event: React.ChangeEvent<HTMLInputElement>) => {
    setFormData(prev => ({
      ...prev,
      [field]: event.target.value
    }))
  }

  const handleCaptchaChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    setCaptcha(prev => ({
      ...prev,
      answer: event.target.value
    }))
    setCaptchaError(false)
  }

  const handleSubmit = async (event: React.FormEvent) => {
    event.preventDefault()

    // Validate captcha answer is provided
    if (!captcha.answer.trim()) {
      setCaptchaError(true)
      return
    }

    setIsSubmitting(true)

    try {
      const response = await fetch('/api/contact', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          ...formData,
          captchaId: captcha.id,
          captchaAnswer: captcha.answer
        })
      })

      const data = await response.json()

      if (response.ok && data.success) {
        setFormData({
          name: '',
          email: '',
          subject: '',
          message: ''
        })
        setShowSuccess(true)
        // Load new captcha
        loadCaptcha()
      } else {
        console.error('Contact form error:', data.error)
        setShowError(true)
        // Reload captcha on error
        loadCaptcha()
      }
    } catch (error) {
      console.error('Contact form submission error:', error)
      setShowError(true)
      // Reload captcha on error
      loadCaptcha()
    } finally {
      setIsSubmitting(false)
    }
  }

  const contactInfo = [
    {
      icon: <Email sx={{ fontSize: 30, color: 'primary.main' }} />,
      title: t('info.email.title'),
      content: t('info.email.content'),
      action: 'mailto:contact@biblical-guide.com'
    }
  ]

  return (
    <Box sx={{ py: 4 }}>
      {/* Hero Section */}
      <Box
        sx={{
          background: 'linear-gradient(135deg, #009688 0%, #00796B 100%)',
          color: 'white',
          py: 8,
          mb: 6,
        }}
      >
        <Container maxWidth="lg">
          <Box sx={{ textAlign: 'center' }}>
            <ContactSupport sx={{ fontSize: 80, mb: 2, opacity: 0.9 }} />
            <Typography variant="h2" component="h1" gutterBottom>
              {t('hero.title')}
            </Typography>
            <Typography variant="h5" component="h2" sx={{ mb: 2, opacity: 0.9 }}>
              {t('hero.subtitle')}
            </Typography>
            <Typography variant="body1" sx={{ opacity: 0.8, maxWidth: 600, mx: 'auto' }}>
              {t('hero.description')}
            </Typography>
          </Box>
        </Container>
      </Box>

      <Container maxWidth="lg">
        <Box sx={{ display: 'flex', gap: 6, flexWrap: 'wrap' }}>
          {/* Contact Form */}
          <Box sx={{ flex: { xs: '1 1 100%', md: '1 1 65%' } }}>
            <Card sx={{ height: 'fit-content' }}>
              <CardContent sx={{ p: 4 }}>
                <Typography variant="h4" component="h2" gutterBottom>
                  {t('form.title')}
                </Typography>
                <Typography variant="body1" color="text.secondary" sx={{ mb: 4 }}>
                  {t('form.description')}
                </Typography>

                <Box component="form" onSubmit={handleSubmit} sx={{ display: 'flex', flexDirection: 'column', gap: 3 }}>
                  <Box sx={{ display: 'flex', gap: 2, flexWrap: 'wrap' }}>
                    <TextField
                      fullWidth
                      required
                      label={t('form.fields.name')}
                      value={formData.name}
                      onChange={handleInputChange('name')}
                      variant="outlined"
                      sx={{ flex: { xs: '1 1 100%', sm: '1 1 calc(50% - 8px)' } }}
                    />
                    <TextField
                      fullWidth
                      required
                      type="email"
                      label={t('form.fields.email')}
                      value={formData.email}
                      onChange={handleInputChange('email')}
                      variant="outlined"
                      sx={{ flex: { xs: '1 1 100%', sm: '1 1 calc(50% - 8px)' } }}
                    />
                  </Box>

                  <TextField
                    fullWidth
                    required
                    label={t('form.fields.subject')}
                    value={formData.subject}
                    onChange={handleInputChange('subject')}
                    variant="outlined"
                  />

                  <TextField
                    fullWidth
                    required
                    multiline
                    rows={6}
                    label={t('form.fields.message')}
                    value={formData.message}
                    onChange={handleInputChange('message')}
                    variant="outlined"
                  />

                  {/* Captcha */}
                  <Box sx={{
                    p: 3,
                    bgcolor: 'grey.50',
                    borderRadius: 2,
                    border: captchaError ? '2px solid' : '1px solid',
                    borderColor: captchaError ? 'error.main' : 'grey.300'
                  }}>
                    <Box sx={{ display: 'flex', alignItems: 'center', gap: 2, mb: 2 }}>
                      <Typography variant="subtitle1" sx={{ fontWeight: 600 }}>
                        Security Check
                      </Typography>
                      <Button
                        size="small"
                        startIcon={<RefreshIcon />}
                        onClick={loadCaptcha}
                        disabled={isSubmitting}
                        sx={{ ml: 'auto' }}
                      >
                        New Question
                      </Button>
                    </Box>
                    <Box sx={{ display: 'flex', alignItems: 'center', gap: 2, flexWrap: 'wrap' }}>
                      <Typography variant="body1" sx={{ fontWeight: 500, fontSize: '1.1rem' }}>
                        What is {captcha.question}?
                      </Typography>
                      <TextField
                        required
                        type="number"
                        value={captcha.answer}
                        onChange={handleCaptchaChange}
                        error={captchaError}
                        helperText={captchaError ? 'Please answer the math question' : ''}
                        placeholder="Your answer"
                        sx={{
                          width: 120,
                          '& input': { textAlign: 'center', fontSize: '1.1rem' }
                        }}
                        inputProps={{
                          min: 0,
                          step: 1
                        }}
                      />
                    </Box>
                  </Box>

                  <Box>
                    <Button
                      type="submit"
                      variant="contained"
                      size="large"
                      disabled={isSubmitting}
                      startIcon={<Send />}
                      sx={{ minWidth: 200 }}
                    >
                      {isSubmitting ? t('form.submitting') : t('form.submit')}
                    </Button>
                  </Box>
                </Box>
              </CardContent>
            </Card>
          </Box>

          {/* Contact Information */}
          <Box sx={{ flex: { xs: '1 1 100%', md: '1 1 35%' } }}>
            <Box sx={{ display: 'flex', flexDirection: 'column', gap: 3 }}>
              <Typography variant="h4" component="h2">
                {t('info.title')}
              </Typography>
              <Typography variant="body1" color="text.secondary" sx={{ mb: 2 }}>
                {t('info.description')}
              </Typography>

              {contactInfo.map((info, index) => (
                <Paper
                  key={index}
                  sx={{
                    p: 3,
                    display: 'flex',
                    alignItems: 'flex-start',
                    gap: 2,
                    cursor: info.action ? 'pointer' : 'default',
                    transition: 'transform 0.2s ease-in-out',
                    '&:hover': info.action ? {
                      transform: 'translateY(-2px)',
                      boxShadow: 2
                    } : {}
                  }}
                  onClick={() => info.action && window.open(info.action, '_self')}
                >
                  <Box sx={{ flexShrink: 0 }}>
                    {info.icon}
                  </Box>
                  <Box>
                    <Typography variant="h6" sx={{ mb: 1 }}>
                      {info.title}
                    </Typography>
                    <Typography variant="body2" color="text.secondary">
                      {info.content}
                    </Typography>
                  </Box>
                </Paper>
              ))}

              {/* FAQ Quick Link */}
              <Paper sx={{ p: 3, bgcolor: 'primary.light', color: 'white' }}>
                <Typography variant="h6" sx={{ mb: 2 }}>
                  {t('faq.title')}
                </Typography>
                <Typography variant="body2" sx={{ mb: 3, opacity: 0.9 }}>
                  {t('faq.description')}
                </Typography>
                <Button
                  variant="outlined"
                  sx={{
                    color: 'white',
                    borderColor: 'white',
                    '&:hover': {
                      borderColor: 'white',
                      bgcolor: 'rgba(255,255,255,0.1)'
                    }
                  }}
                  onClick={() => router.push(`/${locale}#faq`)}
                >
                  {t('faq.viewFaq')}
                </Button>
              </Paper>
            </Box>
          </Box>
        </Box>
      </Container>

      {/* Success/Error Messages */}
      <Snackbar
        open={showSuccess}
        autoHideDuration={6000}
        onClose={() => setShowSuccess(false)}
        anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
      >
        <Alert onClose={() => setShowSuccess(false)} severity="success" sx={{ width: '100%' }}>
          {t('form.success')}
        </Alert>
      </Snackbar>

      <Snackbar
        open={showError}
        autoHideDuration={6000}
        onClose={() => setShowError(false)}
        anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
      >
        <Alert onClose={() => setShowError(false)} severity="error" sx={{ width: '100%' }}>
          {t('form.error')}
        </Alert>
      </Snackbar>
    </Box>
  )
}