import { formatPhone, normalizeDigits } from '@/constants/formatPhone';
import { useMutation } from '@tanstack/react-query';
import { useRouter } from 'expo-router';
import { Hash } from 'lucide-react-native';
import { useState } from 'react';
import { useTranslation } from 'react-i18next';
import {
  ActivityIndicator,
  KeyboardAvoidingView,
  StyleSheet,
  Text,
  TextInput,
  TouchableOpacity,
  View,
} from 'react-native';
import { auth_api } from '../login/lib/api';
import PhonePrefix from '../login/ui/PhonePrefix';
import { UseLoginForm } from '../login/ui/UseLoginForm';

export default function RegisterForm() {
  const router = useRouter();
  const { t } = useTranslation();
  const { phone, setPhone } = UseLoginForm();

  const [stir, setStir] = useState('');
  const [info, setInfo] = useState<any>(null);
  const [loading, setLoading] = useState(false);

  const [directorTinInput, setDirectorTinInput] = useState('');

  const { mutate } = useMutation({
    mutationFn: (stir: string) => auth_api.get_info(stir),
    onSuccess: (res) => {
      setInfo(res.data);
      setLoading(false);
    },
    onError: () => {
      setInfo(null);
      setLoading(false);
    },
  });

  const hasDirectorTin = info?.directorTin && String(info.directorTin).length > 0;

  const isDirectorTinValid = !hasDirectorTin || directorTinInput === String(info.directorTin);
  const hasValidName = Boolean(info?.name || info?.fullName);

  const valid =
    phone.length === 9 &&
    (stir.length === 9 || stir.length === 14) &&
    info &&
    hasValidName &&
    isDirectorTinValid;

  return (
    <KeyboardAvoidingView behavior="position">
      <View style={{ gap: 16 }}>
        {/* STIR */}
        <View>
          <Text style={styles.label}>{t('STIR')}</Text>
          <View style={styles.input}>
            <Hash size={18} color="#94a3b8" />
            <TextInput
              value={stir}
              keyboardType="numeric"
              placeholder={t('STIR')}
              placeholderTextColor="#94a3b8"
              style={{ flex: 1 }}
              onChangeText={(text) => {
                const v = normalizeDigits(text).slice(0, 14);
                setStir(v);

                if (v.length === 9 || v.length === 14) {
                  setLoading(true);
                  mutate(v);
                }
              }}
            />
            {loading && <ActivityIndicator size="small" />}
          </View>
        </View>

        {/* PHONE */}
        <View>
          <Text style={styles.label}>{t('Telefon raqami')}</Text>
          <View style={styles.input}>
            <PhonePrefix focused={false} />
            <TextInput
              value={formatPhone(phone)}
              placeholder="90 123 45 67"
              placeholderTextColor="#94a3b8"
              keyboardType="phone-pad"
              style={{ flex: 1 }}
              onChangeText={(t) => setPhone(normalizeDigits(t))}
            />
          </View>
        </View>

        {/* DIRECTOR TIN */}
        {hasDirectorTin && (
          <View>
            <Text style={styles.label}>{t('Direktor STIR')}</Text>
            <View style={styles.input}>
              <Hash size={18} color="#94a3b8" />
              <TextInput
                value={directorTinInput}
                keyboardType="numeric"
                placeholder={t('Direktor STIR')}
                placeholderTextColor="#94a3b8"
                style={{ flex: 1 }}
                onChangeText={(t) => setDirectorTinInput(normalizeDigits(t))}
              />
            </View>

            {directorTinInput.length > 0 && !isDirectorTinValid && (
              <Text style={styles.error}>{t('Direktor STIR noto‘g‘ri')}</Text>
            )}
          </View>
        )}

        {/* INFO */}
        {info &&
          (hasValidName ? (
            <Text style={styles.info}>{info.fullName || info.name}</Text>
          ) : (
            <Text style={styles.notFound}>{t('Foydalanuvchi topilmadi')}</Text>
          ))}

        {/* BUTTON */}
        <TouchableOpacity
          disabled={!valid}
          style={[styles.btn, !valid && styles.disabled]}
          onPress={() =>
            router.push({
              pathname: '/(auth)/select-category',
              params: {
                phone,
                company_name: info?.fullname,
                address: info?.fullAddress,
                director_full_name: info?.director,
                stir,
                person_type: stir.length === 9 ? 'legal_entity' : info?.company ? 'ytt' : 'band',
              },
            })
          }
        >
          <Text style={styles.btnText}>{t('Davom etish')}</Text>
        </TouchableOpacity>
      </View>
    </KeyboardAvoidingView>
  );
}

const styles = StyleSheet.create({
  label: {
    fontWeight: '700',
    color: '#475569',
  },
  notFound: {
    backgroundColor: '#fef2f2',
    padding: 12,
    borderRadius: 12,
    fontWeight: '700',
    color: '#dc2626',
    borderWidth: 1,
    borderColor: '#fecaca',
  },
  input: {
    flexDirection: 'row',
    alignItems: 'center',
    backgroundColor: '#f8fafc',
    borderRadius: 12,
    paddingHorizontal: 12,
    height: 50,
    borderWidth: 1,
    borderColor: '#e2e8f0',
    gap: 8,
  },
  info: {
    backgroundColor: '#f1f5f9',
    padding: 12,
    borderRadius: 12,
    fontWeight: '700',
  },
  btn: {
    height: 52,
    backgroundColor: '#2563eb',
    borderRadius: 16,
    alignItems: 'center',
    justifyContent: 'center',
  },
  disabled: {
    opacity: 0.5,
  },
  btnText: {
    color: '#fff',
    fontWeight: '800',
    fontSize: 16,
  },
  error: {
    color: '#dc2626',
    fontSize: 12,
    marginTop: 4,
    fontWeight: '600',
  },
});