import React, { useState } from 'react';

import {

  TextInput,

  TextInputProps,

  StyleSheet,

  View,

  TouchableOpacity,

  Platform,

} from 'react-native';

import { Text } from '@/components/ui/Text';

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

import { Ionicons } from '@expo/vector-icons';

function toTestId(label: string): string {

  return label

    .normalize('NFD')

    .replace(/[\u0300-\u036f]/g, '')

    .toLowerCase()

    .replace(/[^a-z0-9]+/g, '-')

    .replace(/^-+|-+$/g, '');

}

type InputVariant = 'default' | 'ghost' | 'darkGhost';

interface BaseInputProps {

  label?: string;

  error?: string;

  variant?: InputVariant;

}

function useInputStyles(variant: InputVariant, error?: string, hasPasswordToggle?: boolean) {

  let backgroundColor = null;

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

  const defaultBackgroundColor = useThemeColor({}, 'inputBackgroundColor');

  const backgroundDarkGhostColor = useThemeColor({}, 'inputBackgroundDarkGhostColor');

  const borderColor = useThemeColor({}, 'inputBorderColor');

  const placeholderColor = useThemeColor({}, 'inputPlaceholderColor');

  const errorColor = '#ef4444';

  const isGhost = variant === 'ghost';

  const isDarkGhost = variant === 'darkGhost';

  if (isDarkGhost) {

    backgroundColor = backgroundDarkGhostColor;

  } else if (isGhost) {

    backgroundColor = 'transparent';

  } else {

    backgroundColor = defaultBackgroundColor;

  }

  const inputStyle = {

    color: textColor,

    backgroundColor: backgroundColor,

    borderColor: error ? errorColor : borderColor,

    borderWidth: isGhost || isDarkGhost ? 0 : 1,

    paddingRight: hasPasswordToggle ? 44 : 0

  };

  return { textColor, placeholderColor, errorColor, inputStyle };

}

interface InputProps extends TextInputProps, BaseInputProps {

  type?: 'text' | 'email' | 'password';

  showPasswordToggle?: boolean;

}

export const Input: React.FC<InputProps> = ({

  label,

  error,

  variant = 'default',

  type = 'text',

  showPasswordToggle = false,

  style,

  ...props

}) => {

  const [showPassword, setShowPassword] = useState(false);

  const {

    textColor,

    placeholderColor,

    errorColor,

    inputStyle

  } = useInputStyles(variant, error, showPasswordToggle);

  const keyboardType = type === 'email' ? 'email-address' : 'default';

  const secureTextEntry = type === 'password' && !showPassword;

  const testID = props.testID ?? (label ? `input-${toTestId(label)}` : undefined);

  return (

    <View style={styles.container}>

      {label && (

        <Label text={label} />

      )}

      <View style={styles.inputContainer}>

        <TextInput

          key={`${type}-${showPassword}`}

          testID={testID}

          style={[styles.input, inputStyle, style]}

          placeholderTextColor={placeholderColor}

          keyboardType={keyboardType}

          secureTextEntry={secureTextEntry}

          autoCapitalize={type === 'email' ? 'none' : props.autoCapitalize}

          autoCorrect={type === 'email' || type === 'password' ? false : props.autoCorrect}

          {...props}

        />

        {type === 'password' && showPasswordToggle && (

          <TouchableOpacity

            style={styles.passwordToggle}

            onPress={() => setShowPassword((prev) => !prev)}

            hitSlop={8}

          >

            <Ionicons

              name={showPassword ? 'eye-off' : 'eye'}

              size={22}

              color={placeholderColor}

            />

          </TouchableOpacity>

        )}

      </View>

      {error && (

        <Text style={[styles.errorText, { color: errorColor }]}>{error}</Text>

      )}

    </View>

  );

};

interface TextAreaProps extends TextInputProps, BaseInputProps {

  minRows?: number;

  maxRows?: number;

}

export const TextArea: React.FC<TextAreaProps> = ({

  label,

  error,

  variant = 'default',

  minRows = 3,

  maxRows,

  style,

  ...props

}) => {

  const {

    textColor,

    placeholderColor,

    errorColor,

    inputStyle

  } = useInputStyles(variant, error);

  const minHeight = minRows * 24;

  const maxHeight = maxRows ? maxRows * 24 : undefined;

  const testID = props.testID ?? (label ? `input-${toTestId(label)}` : undefined);

  return (

    <View style={styles.container}>

      {label && (

        <Label text={label} />

      )}

      <TextInput

        testID={testID}

        style={[

          styles.textArea,

          inputStyle,

          { minHeight, maxHeight },

          style,

        ]}

        placeholderTextColor={placeholderColor}

        multiline

        textAlignVertical="top"

        scrollEnabled={!!maxRows}

        {...props}

      />

      {error && (

        <Text style={[styles.errorText, { color: errorColor }]}>{error}</Text>

      )}

    </View>

  );

};

interface LabelProps extends React.ComponentProps<typeof Text> {

  text: string;

}

export const Label: React.FC<LabelProps> = ({

  text,

  style,

  ...props

}) => {

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

  return (

    <Text style={[styles.label, { color: textColor }, style]} {...props}>

      {text}

    </Text>

  );

};

const styles = StyleSheet.create({

  container: {

    marginBottom: 16,

  },

  label: {

    fontSize: 14,

    fontWeight: '500',

    marginBottom: 6,

  },

  inputContainer: {

    position: 'relative',

  },

  input: {

    height: 48,

    paddingHorizontal: 12,

    borderWidth: 1,

    borderRadius: 8,

    fontSize: 16,

  },

  textArea: {

    paddingHorizontal: 12,

    paddingVertical: 12,

    borderWidth: 1,

    borderRadius: 8,

    fontSize: 16,

  },

  passwordToggle: {

    position: 'absolute',

    right: 12,

    top: 13,

  },

  errorText: {

    fontSize: 12,

    marginTop: 4,

  },

});