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

type FieldProps = TextInputProps & {
  label?: string;
  icon?: keyof typeof Ionicons.glyphMap;
  error?: string;
  hint?: string;
  secure?: boolean;
};

export function Field({
  label,
  icon,
  error,
  hint,
  secure,
  style,
  ...rest
}: FieldProps) {
  const [focused, setFocused] = useState(false);
  const [hidden, setHidden] = useState(!!secure);

  const borderColor = error ? colors.danger : focused ? colors.brand : colors.line;

  return (
    <View>
      {label ? (
        <Text variant="label" color={colors.muted} style={{ marginBottom: 8 }}>
          {label}
        </Text>
      ) : null}
      <View
        style={{
          flexDirection: "row",
          alignItems: "center",
          gap: 10,
          backgroundColor: colors.surface,
          borderRadius: radii.md,
          borderWidth: 1.5,
          borderColor,
          paddingHorizontal: 14,
          height: 52,
        }}
      >
        {icon ? (
          <Ionicons name={icon} size={18} color={focused ? colors.brandText : colors.subtle} />
        ) : null}
        <TextInput
          placeholderTextColor={colors.subtle}
          secureTextEntry={hidden}
          onFocus={() => setFocused(true)}
          onBlur={() => setFocused(false)}
          style={[
            {
              flex: 1,
              fontFamily: fonts.regular,
              fontSize: 14,
              color: colors.ink,
              paddingVertical: 0,
            },
            style,
          ]}
          {...rest}
        />
        {secure ? (
          <Pressable onPress={() => setHidden(!hidden)} hitSlop={8}>
            <Ionicons
              name={hidden ? "eye-off-outline" : "eye-outline"}
              size={18}
              color={colors.subtle}
            />
          </Pressable>
        ) : null}
      </View>
      {error ? (
        <View style={{ flexDirection: "row", alignItems: "center", gap: 5, marginTop: 6 }}>
          <Ionicons name="alert-circle" size={13} color={colors.danger} />
          <Text variant="caption" color={colors.danger}>
            {error}
          </Text>
        </View>
      ) : hint ? (
        <Text variant="caption" color={colors.subtle} style={{ marginTop: 6 }}>
          {hint}
        </Text>
      ) : null}
    </View>
  );
}

export function SwitchRow({
  title,
  subtitle,
  value,
  onValueChange,
  icon,
  last,
}: {
  title: string;
  subtitle?: string;
  value: boolean;
  onValueChange: (v: boolean) => void;
  icon?: keyof typeof Ionicons.glyphMap;
  last?: boolean;
}) {
  return (
    <View
      style={{
        flexDirection: "row",
        alignItems: "center",
        gap: 14,
        paddingVertical: 14,
        paddingHorizontal: 16,
        borderBottomWidth: last ? 0 : 1,
        borderBottomColor: colors.line,
      }}
    >
      {icon ? (
        <View
          style={{
            width: 38,
            height: 38,
            borderRadius: 12,
            backgroundColor: colors.brandSoft,
            alignItems: "center",
            justifyContent: "center",
          }}
        >
          <Ionicons name={icon} size={19} color={colors.brandText} />
        </View>
      ) : null}
      <View style={{ flex: 1 }}>
        <Text variant="h3">{title}</Text>
        {subtitle ? (
          <Text variant="caption" color={colors.subtle} style={{ marginTop: 2 }}>
            {subtitle}
          </Text>
        ) : null}
      </View>
      <Switch
        value={value}
        onValueChange={onValueChange}
        trackColor={{ false: colors.line, true: colors.brand }}
        thumbColor={colors.surface}
        ios_backgroundColor={colors.line}
      />
    </View>
  );
}

/** Radio-style selectable row used for payment methods and addresses. */
export function OptionRow({
  title,
  subtitle,
  selected,
  onPress,
  icon,
  trailing,
  last,
}: {
  title: string;
  subtitle?: string;
  selected: boolean;
  onPress: () => void;
  icon?: keyof typeof Ionicons.glyphMap;
  trailing?: ReactNode;
  last?: boolean;
}) {
  return (
    <Pressable
      onPress={onPress}
      style={{
        flexDirection: "row",
        alignItems: "center",
        gap: 14,
        paddingVertical: 14,
        paddingHorizontal: 16,
        borderBottomWidth: last ? 0 : 1,
        borderBottomColor: colors.line,
        backgroundColor: selected ? colors.brandWash : "transparent",
      }}
    >
      {icon ? (
        <View
          style={{
            width: 38,
            height: 38,
            borderRadius: 12,
            backgroundColor: selected ? colors.brandSoft : colors.surfaceAlt,
            alignItems: "center",
            justifyContent: "center",
          }}
        >
          <Ionicons
            name={icon}
            size={19}
            color={selected ? colors.brandText : colors.muted}
          />
        </View>
      ) : null}
      <View style={{ flex: 1 }}>
        <Text variant="h3">{title}</Text>
        {subtitle ? (
          <Text variant="caption" color={colors.subtle} style={{ marginTop: 2 }}>
            {subtitle}
          </Text>
        ) : null}
      </View>
      {trailing}
      <View
        style={{
          width: 22,
          height: 22,
          borderRadius: 11,
          borderWidth: selected ? 7 : 1.5,
          borderColor: selected ? colors.brand : colors.line,
          backgroundColor: colors.surface,
        }}
      />
    </Pressable>
  );
}