/*
 * File: LoginScreen.tsx
 * Description: Login screen with a loading indicator on the submit button.
 * Design & Developed by Tech4Biz Solutions
 * Copyright (c) Spurrin Innovations. All rights reserved.
 */

import React, { useState } from 'react';
import {
  View,
  Text,
  StyleSheet,
  TouchableWithoutFeedback,
  Keyboard,
  TouchableOpacity,
  TextInput, // Using default TextInput for container styling
} from 'react-native';
import { Button } from '../../../../shared/src/components/Button';
import { Colors, Spacing, Typography } from '../../../../shared/src/theme';
import { useAppDispatch } from '../../../redux/hooks';
import { login } from '../redux/authActions';
import { showError } from '../../../../shared/src/utils/helpers/Toast';
import { validateEmail } from '../../../../shared/src/utils/validation/validators';
import Icon from 'react-native-vector-icons/Feather';

const LoginScreen: React.FC = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [isPasswordVisible, setPasswordVisible] = useState(false);
  const [loading, setLoading] = useState(false); // Add loading state
  const dispatch = useAppDispatch();

  const handleLogin = () => {
    if (!email.trim() || !password.trim()) {
      showError('Validation Error', 'Email and password are required.');
      return;
    }
    if (!validateEmail(email)) {
      showError('Validation Error', 'Please enter a valid email address.');
      return;
    }
    
    setLoading(true); // Start loading
    dispatch(login({ email, password }));

    // Simulate a network request for 4 seconds
    setTimeout(() => {
      setLoading(false); // Stop loading after 4 seconds
    }, 4000);
  };

  return (
    <TouchableWithoutFeedback onPress={Keyboard.dismiss}>
      <View style={styles.container}>
        <Text style={styles.title}>Radiologist Portal</Text>

        {/* Email Input */}
        <View style={styles.inputContainer}>
          <Icon name="mail" size={20} color={Colors.textSecondary} style={styles.inputIcon} />
          <TextInput
            placeholder="Email"
            value={email}
            onChangeText={setEmail}
            style={styles.inputField}
            autoCapitalize="none"
            keyboardType="email-address"
            placeholderTextColor={Colors.textMuted}
          />
        </View>

        {/* Password Input */}
        <View style={styles.inputContainer}>
          <Icon name="lock" size={20} color={Colors.textSecondary} style={styles.inputIcon} />
          <TextInput
            placeholder="Password"
            value={password}
            onChangeText={setPassword}
            style={styles.inputField}
            secureTextEntry={!isPasswordVisible}
            placeholderTextColor={Colors.textMuted}
          />
          <TouchableOpacity
            onPress={() => setPasswordVisible(!isPasswordVisible)}
            style={styles.eyeIcon}>
            <Icon name={isPasswordVisible ? 'eye-off' : 'eye'} size={22} color={Colors.textSecondary} />
          </TouchableOpacity>
        </View>

        <Button
          title="Login"
          onPress={handleLogin}
          style={styles.button}
          loading={loading} // Pass loading state to button
        />
      </View>
    </TouchableWithoutFeedback>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: Colors.background,
    justifyContent: 'center',
    padding: Spacing.lg,
  },
  title: {
    fontFamily: Typography.fontFamily.bold,
    fontSize: Typography.fontSize.title,
    color: Colors.primary,
    marginBottom: Spacing.xl,
    textAlign: 'center',
  },
  inputContainer: {
    flexDirection: 'row',
    alignItems: 'center',
    backgroundColor: Colors.backgroundAlt,
    borderWidth: 1,
    borderColor: Colors.border,
    borderRadius: 8,
    marginBottom: Spacing.md,
    paddingHorizontal: Spacing.md,
    paddingVertical:2
  },
  inputIcon: {
    marginRight: Spacing.sm,
  },
  inputField: {
    flex: 1,
    paddingVertical: Spacing.md,
    fontSize: Typography.fontSize.md,
    color: Colors.textPrimary,
  },
  eyeIcon: {
    paddingLeft: Spacing.sm,
  },
  button: {
    marginTop: Spacing.md,
  },
});

export default LoginScreen;

/*
 * End of File: LoginScreen.tsx
 * Design & Developed by Tech4Biz Solutions
 * Copyright (c) Spurrin Innovations. All rights reserved.
 */