import React, { useState } from 'react';

import {

  View,

  Text,

  StyleSheet,

  ScrollView,

  KeyboardAvoidingView,

} from 'react-native';

import { Link, useLocalSearchParams, router } from 'expo-router';

import { SafeAreaView } from 'react-native-safe-area-context';

import { useThemeColor } from '@/hooks/use-theme-color';

import { Button, Input } from '@/components/ui';

import { Colors } from '@/constants/theme'

import { useAuth } from '@/context/AuthContext';

import { useToast } from '@/context/ToastContext';

import { translateError } from '@/lib/errors/translations';

export default function ActivateScreen() {

  const { userId } = useLocalSearchParams();

  const [code, setCode] = useState('');

  const [errors, setErrors] = useState<{

    code?: string;

  }>({});

  const { activate, requestActivateCode } = useAuth();

  const { showToast } = useToast();

  const [loading, setLoading] = useState(false);

  const textColor = useThemeColor({}, 'text');

  const backgroundColor = useThemeColor({}, 'background');

  const tintColor = useThemeColor({}, 'tint');

  const validateForm = () => {

    const newErrors: typeof errors = {};

    if (!code) {

      newErrors.code = 'O código é obrigatório';

    } else if (code.length < 6) {

      newErrors.code = 'O código deve conter pelo menos 6 caracteres';

    }

    setErrors(newErrors);

    return Object.keys(newErrors).length === 0;

  };

  const handleActivate = async () => {

    if (!validateForm()) return;

    setLoading(true);

    try {

      await activate(Number(code.replaceAll(' ', '')));

      showToast('Conta ativada com sucesso!', 'success');

      router.replace('/');

    } catch (error: any) {

      showToast(translateError(error.message) || 'Falha em ativar a conta', 'error');

    } finally {

      setLoading(false);

    }

  };

  const resendCode = async () => {

    try {

      await requestActivateCode();

      showToast('Novo código enviado. Verifique sua caixa de entrada.', 'success');

    } catch {

      showToast('Falha ao reenviar o código. Tente novamente.', 'error');

    }

  }

  return (

    <SafeAreaView style={[styles.container, { backgroundColor }]}>

      <KeyboardAvoidingView

        behavior='height'

        style={styles.keyboardView}

      >

        <ScrollView

          contentContainerStyle={styles.scrollContainer}

          showsVerticalScrollIndicator={false}

        >

          <View style={styles.header}>

            <Text style={[styles.title, { color: textColor }]}>Ativar a conta</Text>

            <Text style={[styles.subtitle, { color: textColor, opacity: 0.7 }]}>

              Digite o código de ativação enviado para seu email

            </Text>

          </View>

          <View style={styles.form}>

            <Input

              label="Código"

              type="text"

              value={code}

              onChangeText={setCode}

              keyboardType="number-pad"

              placeholder="Digite o código enviado para sua conta"

              error={errors.code}

            />

            <Button

              title="Ativar conta"

              onPress={handleActivate}

              loading={loading}

              style={styles.resetButton}

            />

          </View>

          <View style={styles.footer}>

            <Text style={[styles.footerText, { color: textColor, opacity: 0.7 }]}>

              Não recebeu?{' '}

            </Text>

            <Button variant="outline" title="Reenviar um novo código" onPress={resendCode} />

          </View>

        </ScrollView>

      </KeyboardAvoidingView>

    </SafeAreaView>

  );

}

const styles = StyleSheet.create({

  container: {

    flex: 1,

  },

  keyboardView: {

    flex: 1,

  },

  scrollContainer: {

    flexGrow: 1,

    paddingHorizontal: 24,

    justifyContent: 'center',

    minHeight: '100%',

  },

  header: {

    alignItems: 'center',

    marginBottom: 40,

  },

  title: {

    fontSize: 28,

    fontWeight: 'bold',

    marginBottom: 8,

  },

  subtitle: {

    fontSize: 16,

    textAlign: 'center',

  },

  form: {

    marginBottom: 32,

  },

  resetButton: {

    marginTop: 8,

  },

  footer: {

    marginTop: 20,

    borderTopColor: Colors.light.accentBlue,

    borderTopWidth: 1,

    paddingTop: 20

  },

  footerText: {

    textAlign: 'center',

    marginBottom: 10

  }

});