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

export function Chip({
  label,
  selected,
  onPress,
  onRemove,
  icon,
  tone = "default",
  size = "md",
}: {
  label: string;
  selected?: boolean;
  onPress?: () => void;
  onRemove?: () => void;
  icon?: keyof typeof Ionicons.glyphMap;
  tone?: "default" | "outline";
  size?: "sm" | "md";
}) {
  const bg = selected ? colors.brand : tone === "outline" ? "transparent" : colors.surface;
  const fg = selected ? colors.ink : colors.muted;
  const border = selected ? colors.brand : colors.line;

  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => ({
        flexDirection: "row",
        alignItems: "center",
        gap: 6,
        paddingVertical: size === "sm" ? 6 : 9,
        paddingHorizontal: size === "sm" ? 10 : 14,
        borderRadius: radii.pill,
        backgroundColor: bg,
        borderWidth: 1,
        borderColor: border,
        opacity: pressed ? 0.8 : 1,
      })}
    >
      {icon ? <Ionicons name={icon} size={13} color={fg} /> : null}
      <Text variant={size === "sm" ? "caption" : "label"} color={fg}>
        {label}
      </Text>
      {onRemove ? (
        <Pressable onPress={onRemove} hitSlop={8}>
          <Ionicons name="close" size={14} color={fg} />
        </Pressable>
      ) : null}
    </Pressable>
  );
}

/** Horizontally scrolling chip strip that bleeds to the screen edge. */
export function ChipRow({
  children,
  gutters = 20,
}: {
  children: ReactNode;
  gutters?: number;
}) {
  return (
    <ScrollView
      horizontal
      showsHorizontalScrollIndicator={false}
      contentContainerStyle={{
        gap: space.sm,
        paddingHorizontal: gutters,
      }}
      style={{ marginHorizontal: -gutters }}
    >
      {children}
    </ScrollView>
  );
}

/** Read-only meta tag, e.g. "Tablet" or "Qty: 100". */
export function MetaTag({
  label,
  icon,
}: {
  label: string;
  icon?: keyof typeof Ionicons.glyphMap;
}) {
  return (
    <View style={{ flexDirection: "row", alignItems: "center", gap: 4 }}>
      {icon ? <Ionicons name={icon} size={11} color={colors.subtle} /> : null}
      <Text variant="micro" color={colors.subtle}>
        {label}
      </Text>
    </View>
  );
}

export function Segmented<T extends string>({
  options,
  value,
  onChange,
}: {
  options: { value: T; label: string }[];
  value: T;
  onChange: (value: T) => void;
}) {
  return (
    <View
      style={{
        flexDirection: "row",
        backgroundColor: colors.surfaceAlt,
        borderRadius: radii.pill,
        padding: 4,
      }}
    >
      {options.map((option) => {
        const active = option.value === value;
        return (
          <Pressable
            key={option.value}
            onPress={() => onChange(option.value)}
            style={{
              flex: 1,
              alignItems: "center",
              paddingVertical: 10,
              borderRadius: radii.pill,
              backgroundColor: active ? colors.surface : "transparent",
            }}
          >
            <Text variant="h3" color={active ? colors.ink : colors.subtle}>
              {option.label}
            </Text>
          </Pressable>
        );
      })}
    </View>
  );
}