import { useState, useEffect } from 'react';

import {

  View,

  Text,

  StyleSheet,

  ScrollView,

  KeyboardAvoidingView,

  Platform,

  Alert,

} from 'react-native';

import { ThemedView } from '@/components/ui/themed-view'

import { ThemedText } from '@/components/ui/themed-text'

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

import { StatusBar } from 'expo-status-bar';

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

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

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

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

import { apiClient } from '@/lib/api'

export default function Profile() {

  const { user, updateAuthUser } = useAuth();

  const [firstName, setFirstName] = useState(user.firstName);

  const [lastName, setLastName] = useState(user.lastName);

  const [email, setEmail] = useState(user.email);

  const [password, setPassword] = useState();

  const [confirmPassword, setConfirmPassword] = useState();

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

  const [errors, setErrors] = useState<{

    firstName?: string;

    password?: string;

    confirmPassword?: string;

  }>({});

  useEffect(() => {

    setFirstName(user.firstName)

    setLastName(user.lastName)

    setEmail(user.email)

  }, [user])

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

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

  const validateForm = () => {

    const newErrors: {

      firstName?: string;

      email?: string;

      password?: string;

      confirmPassword?: string

    } = {};

    if (password) {

      if (!confirmPassword) {

        newErrors.confirmPassword = 'Precisa confirmar a senha';

      } else {

        if (password !== confirmPassword) {

          newErrors.confirmPassword = "Senhas não conferem";

        }

      }

    }

    if (!/\S+@\S+\.\S+/.test(email)) {

      newErrors.email = 'Por favor, use um email válido';

    }

    if (!firstName) {

      newErrors.firstName = 'É necessário ter um nome';

    }

    setErrors(newErrors);

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

  }

  const handleUpdate = async () => {

    if (!validateForm()) return;

    const data = {};

    data.firstName = firstName

    data.lastName = lastName

    data.email = email

    if (password) {

      data.password = password

    }

    try {

      const id = user.id;

      const response = await apiClient.updateUser({

        id,

        firstName,

        lastName,

        email,

        password

      });

      updateAuthUser(response.user);

      router.replace('/(tabs)/insights');

    } catch (error: any) {

      console.error("[PROFILE]", error)

      Alert.alert('Erro: ', 'Falha ao tentar atualizar o usuário');

    }

  }

  return (

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

      <StatusBar style={'dark'} />

      <KeyboardAvoidingView

        behavior='height'

        style={styles.keyboardView}

      >

        <ScrollView

          contentContainerStyle={styles.scrollContainer}

          showsVerticalScrollIndicator={false}

        >

          <View style={styles.header}>

            <Text style={[styles.title, { color: textColor }]}>Edite o seu perfil</Text>

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

              Altere suas configurações

            </Text>

          </View>

          <View style={styles.form}>

            <Input

              label="Primeiro Nome"

              type="text"

              value={firstName}

              onChangeText={setFirstName}

              placeholder="Qual seu nome?"

              error={errors.firstName}

            />

            <Input

              label="Sobrenome"

              type="text"

              value={lastName}

              onChangeText={setLastName}

              placeholder="Qual seu sobrenome?"

              error={errors.lastName}

            />

            <Input

              label="Email"

              type="text"

              value={email}

              onChangeText={setEmail}

              placeholder="Qual seu email?"

              error={errors.email}

            />

            <Input

              label="Nova senha"

              type="password"

              value={password}

              onChangeText={setPassword}

              placeholder="Digite uma nova senha"

              error={errors.password}

              showPasswordToggle

            />

            <Input

              label="Confirmar nova senha"

              type="password"

              value={confirmPassword}

              onChangeText={setConfirmPassword}

              placeholder="Confirme a nova senha"

              error={errors.confirmPassword}

              showPasswordToggle

            />

            <Button

              title="Atualizar perfil"

              onPress={handleUpdate}

              loading={loading}

              style={styles.resetButton}

            />

          </View>

        </ScrollView>

      </KeyboardAvoidingView>

    </SafeAreaView>

  )

}

const styles = StyleSheet.create({

  container: {

    flex: 1,

  },

  keyboardView: {

    flex: 1,

  },

  scrollContainer: {

    flexGrow: 1,

    paddingHorizontal: 24,

    justifyContent: 'start',

    minHeight: '100%',

  },

  header: {

    alignItems: 'left',

    marginBottom: 40,

  },

  title: {

    fontSize: 28,

    fontWeight: 'bold',

    marginBottom: 8,

  },

  subtitle: {

    fontSize: 16,

    textAlign: 'left',

  },

  form: {

    marginBottom: 32,

  },

  resetButton: {

    marginTop: 8,

  },

  link: {

    textAlign: 'center',

    fontSize: 14,

    fontWeight: '500',

  },

  footer: {

    flexDirection: 'row',

    justifyContent: 'center',

    alignItems: 'center',

    marginTop: 'auto',

    paddingBottom: 20,

  },

  footerText: {

    fontSize: 14,

  },

});