'use client'

import { useState, useEffect, Suspense } from 'react'
import AuthModal from './AuthModal'
import { useI18n } from '@/lib/i18n'

interface UnlockModalProps {
  isOpen: boolean
  onClose: () => void
}

interface User {
  id: number
  username: string
  email: string
}

interface ReferralStatus {
  referralCount: number
  isUnlocked: boolean
  referralsNeeded: number
  referralsRemaining: number
}

export default function UnlockModal({ isOpen, onClose }: UnlockModalProps) {
  const { t } = useI18n()
  const [referralStatus, setReferralStatus] = useState<ReferralStatus | null>(null)
  const [referralLink, setReferralLink] = useState<string>('')
  const [loading, setLoading] = useState(true)
  const [copied, setCopied] = useState(false)
  const [showAuthModal, setShowAuthModal] = useState(false)

  useEffect(() => {
    if (isOpen) {
      fetchReferralData()
    }
  }, [isOpen])

  const fetchReferralData = async () => {
    setLoading(true)
    try {
      // Fetch referral status
      const statusResponse = await fetch('/api/referrals/status', {
        credentials: 'include',
      })
      const statusData = await statusResponse.json()
      setReferralStatus(statusData)

      // Fetch referral link if user is logged in
      const linkResponse = await fetch('/api/referrals/link', {
        credentials: 'include',
      })
      if (linkResponse.ok) {
        const linkData = await linkResponse.json()
        setReferralLink(linkData.referralLink)
      }
    } catch (error) {
      console.error('Error fetching referral data:', error)
    } finally {
      setLoading(false)
    }
  }

  const handleCopyLink = async () => {
    if (!referralLink) return
    
    try {
      await navigator.clipboard.writeText(referralLink)
      setCopied(true)
      setTimeout(() => setCopied(false), 2000)
    } catch (error) {
      console.error('Failed to copy link:', error)
    }
  }

  const handleLogin = async (user: User) => {
    setShowAuthModal(false)
    // Refresh referral data after login
    await fetchReferralData()
  }

  if (!isOpen) return null

  const status = referralStatus || {
    referralCount: 0,
    isUnlocked: false,
    referralsNeeded: 3,
    referralsRemaining: 3,
  }

  return (
    <div
      style={{
        position: 'fixed',
        top: 0,
        left: 0,
        right: 0,
        bottom: 0,
        background: 'rgba(0, 0, 0, 0.7)',
        display: 'flex',
        alignItems: 'center',
        justifyContent: 'center',
        zIndex: 1000,
        padding: '20px',
      }}
      onClick={onClose}
    >
      <div
        style={{
          background: 'var(--card)',
          borderRadius: '16px',
          padding: '32px',
          maxWidth: '500px',
          width: '100%',
          boxShadow: '0 20px 60px rgba(0, 0, 0, 0.3)',
        }}
        onClick={(e) => e.stopPropagation()}
      >
        <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '24px' }}>
          <h2 style={{ margin: 0 }}>{t('unlockModal.title')}</h2>
          <button
            onClick={onClose}
            style={{
              background: 'transparent',
              border: 'none',
              fontSize: '24px',
              cursor: 'pointer',
              color: 'var(--muted)',
              padding: 0,
              width: '32px',
              height: '32px',
              display: 'flex',
              alignItems: 'center',
              justifyContent: 'center',
            }}
          >
            ×
          </button>
        </div>

        {loading ? (
          <p style={{ color: 'var(--muted)', textAlign: 'center' }}>{t('common.loading')}</p>
        ) : (
          <>
            <div style={{ marginBottom: '24px', textAlign: 'center' }}>
              <div style={{ fontSize: '18px', marginBottom: '8px' }}>
                🔒 {t('unlockModal.referralsCompleted', { count: status.referralCount, needed: status.referralsNeeded })}
              </div>
              <p style={{ color: 'var(--muted)', fontSize: '14px', margin: '8px 0' }}>
                {t('unlockModal.inviteFriends', { needed: status.referralsNeeded })}
                <br />
                {t('unlockModal.unlockForever')}
              </p>
            </div>

            {referralLink ? (
              <div style={{ marginBottom: '24px' }}>
                <label
                  style={{
                    display: 'block',
                    marginBottom: '8px',
                    fontSize: '14px',
                    color: 'var(--muted)',
                    fontWeight: 500,
                  }}
                >
                  {t('unlockModal.yourReferralLink')}
                </label>
                <div style={{ display: 'flex', gap: '8px' }}>
                  <input
                    type="text"
                    value={referralLink}
                    readOnly
                    style={{
                      flex: 1,
                      padding: '12px',
                      borderRadius: '8px',
                      border: '1px solid var(--border)',
                      background: 'var(--bg-soft)',
                      color: 'var(--text)',
                      fontSize: '14px',
                      fontFamily: 'monospace',
                    }}
                  />
                  <button
                    onClick={handleCopyLink}
                    style={{
                      padding: '12px 20px',
                      background: copied ? 'var(--accent)' : 'var(--bg-soft)',
                      border: '1px solid var(--border)',
                      borderRadius: '8px',
                      color: copied ? '#000' : 'var(--text)',
                      cursor: 'pointer',
                      fontSize: '14px',
                      fontWeight: 500,
                      whiteSpace: 'nowrap',
                    }}
                  >
                    {copied ? t('unlockModal.copied') : t('unlockModal.copyLink')}
                  </button>
                </div>
              </div>
            ) : (
              <div
                style={{
                  padding: '16px',
                  background: 'var(--bg-soft)',
                  borderRadius: '8px',
                  marginBottom: '24px',
                  textAlign: 'center',
                }}
              >
                <p style={{ color: 'var(--muted)', fontSize: '14px', margin: '0 0 12px 0' }}>
                  {t('unlockModal.yourReferralLink')}
                </p>
                <button
                  onClick={() => setShowAuthModal(true)}
                  style={{
                    padding: '10px 20px',
                    background: 'var(--accent)',
                    color: '#000',
                    border: 'none',
                    borderRadius: '8px',
                    cursor: 'pointer',
                    fontSize: '14px',
                    fontWeight: 500,
                  }}
                >
                  {t('auth.login')}
                </button>
              </div>
            )}

            <div
              style={{
                padding: '12px',
                background: 'var(--bg-soft)',
                borderRadius: '8px',
                marginBottom: '24px',
                fontSize: '13px',
                color: 'var(--muted)',
                textAlign: 'center',
              }}
            >
              {t('unlockModal.friendsMustSignUp')}
            </div>

            <div
              style={{
                textAlign: 'center',
                fontSize: '16px',
                fontWeight: 500,
                color: 'var(--text)',
                marginBottom: '24px',
              }}
            >
              {status.referralsRemaining === 1 
                ? t('unlockModal.referralsToGoSingular', { remaining: status.referralsRemaining })
                : t('unlockModal.referralsToGoPlural', { remaining: status.referralsRemaining })
              }
            </div>

            <button
              onClick={onClose}
              style={{
                width: '100%',
                padding: '12px 24px',
                background: 'var(--accent)',
                color: '#000',
                border: 'none',
                borderRadius: '14px',
                cursor: 'pointer',
                fontSize: '15px',
                fontWeight: 500,
              }}
            >
              {t('common.close')}
            </button>
          </>
        )}
      </div>

      {/* Auth Modal */}
      <Suspense fallback={null}>
        <AuthModal
          isOpen={showAuthModal}
          onClose={() => setShowAuthModal(false)}
          onLogin={handleLogin}
        />
      </Suspense>
    </div>
  )
}