/**
 * TitleSheet — suggère 3 titres IA dans un bottom sheet propre
 */
import { useState, useEffect } from 'react'
import {
  View, Text, TouchableOpacity, ActivityIndicator, StyleSheet,
} from 'react-native'
import { Sparkles } from 'lucide-react-native'
import { BottomSheet } from '@/components/BottomSheet'
import { apiFetch } from '@/lib/api'
import { ENDPOINTS } from '@/lib/config'
import { C } from '@/lib/theme'

interface Props {
  visible: boolean
  onClose: () => void
  content: string
  onSelect: (title: string) => void
}

export function TitleSheet({ visible, onClose, content, onSelect }: Props) {
  const [loading, setLoading] = useState(false)
  const [suggestions, setSuggestions] = useState<string[]>([])
  const [error, setError] = useState<string | null>(null)

  useEffect(() => {
    if (visible && content.trim()) {
      fetchTitles()
    }
  }, [visible])

  const fetchTitles = async () => {
    setLoading(true)
    setError(null)
    setSuggestions([])
    try {
      const res = await apiFetch(ENDPOINTS.aiTitle, {
        method: 'POST',
        body: JSON.stringify({ content }),
      })
      const d = await res.json().catch(() => ({}))
      if (!res.ok) {
        setError(d.error === 'quota_exceeded' ? 'Quota dépassé' : 'Erreur serveur')
        return
      }
      const raw: unknown[] = d.suggestions ?? []
      setSuggestions(raw.map((s) => (typeof s === 'string' ? s : (s as any).title ?? '')).filter(Boolean))
    } catch {
      setError('Erreur réseau')
    } finally {
      setLoading(false)
    }
  }

  const handleSelect = (t: string) => {
    onSelect(t)
    onClose()
  }

  return (
    <BottomSheet visible={visible} onClose={onClose} title="Titres suggérés">
      {loading && (
        <View style={s.center}>
          <ActivityIndicator color={C.brand} size="large" />
          <Text style={s.hint}>Génération des titres…</Text>
        </View>
      )}
      {error && !loading && (
        <View style={s.center}>
          <Text style={s.errorText}>{error}</Text>
          <TouchableOpacity onPress={fetchTitles} style={s.retryBtn}>
            <Text style={s.retryText}>Réessayer</Text>
          </TouchableOpacity>
        </View>
      )}
      {!loading && !error && suggestions.length > 0 && (
        <View style={s.list}>
          {suggestions.map((t, i) => (
            <TouchableOpacity key={i} onPress={() => handleSelect(t)} style={s.row} activeOpacity={0.7}>
              <View style={s.numBadge}>
                <Text style={s.numText}>{i + 1}</Text>
              </View>
              <Text style={s.titleText}>{t}</Text>
              <Sparkles size={14} color={C.brand} />
            </TouchableOpacity>
          ))}
        </View>
      )}
      {!loading && !error && suggestions.length === 0 && (
        <View style={s.center}>
          <Text style={s.hint}>Aucune suggestion disponible</Text>
        </View>
      )}
    </BottomSheet>
  )
}

const s = StyleSheet.create({
  center: { alignItems: 'center', paddingVertical: 32, gap: 12 },
  hint: { fontSize: 14, color: C.concrete },
  errorText: { fontSize: 14, color: '#e11d48' },
  retryBtn: { paddingHorizontal: 20, paddingVertical: 10, borderRadius: 10, backgroundColor: C.border },
  retryText: { fontSize: 13, color: C.ink, fontWeight: '600' },
  list: { paddingHorizontal: 12, paddingTop: 8, paddingBottom: 8 },
  row: {
    flexDirection: 'row', alignItems: 'center', gap: 12,
    paddingHorizontal: 12, paddingVertical: 14,
    borderRadius: 14, marginBottom: 8,
    backgroundColor: C.white, borderWidth: 1, borderColor: C.border,
    marginHorizontal: 8,
  },
  numBadge: { width: 26, height: 26, borderRadius: 13, backgroundColor: '#f3ece4', alignItems: 'center', justifyContent: 'center' },
  numText: { fontSize: 12, fontWeight: '700', color: C.brand },
  titleText: { flex: 1, fontSize: 14, fontWeight: '500', color: C.ink },
})