import { useState, type ReactNode } from "react";
import { Ionicons } from "@expo/vector-icons";
import {
  Pressable,
  TextInput,
  View,
  type TextInputProps,
} from "react-native";
import { Text } from "@/components/ui/Text";
import { colors, fonts, radii } from "@/lib/theme";

type Props = TextInputProps & {
  onClear?: () => void;
  /** Renders as a button instead of an input (home screen → search screen). */
  readOnlyPress?: () => void;
  trailing?: ReactNode;
};

export function SearchField({
  value,
  onClear,
  readOnlyPress,
  trailing,
  placeholder = "Search medicine, brand or symptom",
  ...rest
}: Props) {
  const [focused, setFocused] = useState(false);

  const body = (
    <View
      style={{
        flexDirection: "row",
        alignItems: "center",
        gap: 10,
        backgroundColor: colors.surface,
        borderRadius: radii.pill,
        borderWidth: 1.5,
        borderColor: focused ? colors.brand : colors.line,
        paddingLeft: 16,
        paddingRight: trailing ? 6 : 16,
        height: 52,
      }}
    >
      <Ionicons name="search" size={18} color={focused ? colors.brandText : colors.subtle} />
      {readOnlyPress ? (
        <Text variant="body" color={colors.subtle} style={{ flex: 1 }} numberOfLines={1}>
          {value || placeholder}
        </Text>
      ) : (
        <TextInput
          value={value}
          placeholder={placeholder}
          placeholderTextColor={colors.subtle}
          onFocus={() => setFocused(true)}
          onBlur={() => setFocused(false)}
          returnKeyType="search"
          style={{
            flex: 1,
            fontFamily: fonts.regular,
            fontSize: 14,
            color: colors.ink,
            paddingVertical: 0,
          }}
          {...rest}
        />
      )}
      {value && onClear && !readOnlyPress ? (
        <Pressable onPress={onClear} hitSlop={8}>
          <Ionicons name="close-circle" size={18} color={colors.subtle} />
        </Pressable>
      ) : null}
      {trailing}
    </View>
  );

  if (readOnlyPress) {
    return (
      <Pressable onPress={readOnlyPress} style={({ pressed }) => ({ opacity: pressed ? 0.9 : 1 })}>
        {body}
      </Pressable>
    );
  }

  return body;
}

/** Lime pill action that sits inside the search field (scan entry point). */
export function SearchAction({
  icon,
  label,
  onPress,
}: {
  icon: keyof typeof Ionicons.glyphMap;
  label?: string;
  onPress?: () => void;
}) {
  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => ({
        flexDirection: "row",
        alignItems: "center",
        gap: 6,
        backgroundColor: colors.brand,
        borderRadius: radii.pill,
        paddingHorizontal: label ? 14 : 10,
        height: 40,
        opacity: pressed ? 0.85 : 1,
      })}
    >
      <Ionicons name={icon} size={16} color={colors.ink} />
      {label ? (
        <Text variant="label" color={colors.ink}>
          {label}
        </Text>
      ) : null}
    </Pressable>
  );
}