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

export function Card({
  children,
  onPress,
  padded = true,
  tone = "surface",
  elevated = true,
  style,
}: {
  children: ReactNode;
  onPress?: () => void;
  padded?: boolean;
  tone?: "surface" | "wash" | "brand";
  elevated?: boolean;
  style?: StyleProp<ViewStyle>;
}) {
  const bg =
    tone === "wash" ? colors.surfaceAlt : tone === "brand" ? colors.brandWash : colors.surface;

  const base: StyleProp<ViewStyle> = [
    {
      backgroundColor: bg,
      borderRadius: radii.card,
      borderWidth: 1,
      borderColor: tone === "brand" ? colors.brandBorder : colors.line,
      padding: padded ? space.lg : 0,
      overflow: "hidden",
    },
    elevated && tone === "surface" ? shadows.xs : null,
    style,
  ];

  if (!onPress) return <View style={base}>{children}</View>;

  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => [base, pressed && { opacity: 0.92 }]}
    >
      {children}
    </Pressable>
  );
}

export function SectionHeader({
  title,
  action,
  onAction,
  style,
}: {
  title: string;
  action?: string;
  onAction?: () => void;
  style?: StyleProp<ViewStyle>;
}) {
  return (
    <View
      style={[
        {
          flexDirection: "row",
          alignItems: "center",
          justifyContent: "space-between",
          marginBottom: space.md,
        },
        style,
      ]}
    >
      <Text variant="h2">{title}</Text>
      {action ? (
        <Pressable onPress={onAction} hitSlop={8}>
          <Text variant="label" color={colors.brandText}>
            {action}
          </Text>
        </Pressable>
      ) : null}
    </View>
  );
}

export function Section({
  title,
  action,
  onAction,
  children,
  style,
}: {
  title?: string;
  action?: string;
  onAction?: () => void;
  children: ReactNode;
  style?: StyleProp<ViewStyle>;
}) {
  return (
    <View style={[{ marginTop: space["2xl"] }, style]}>
      {title ? <SectionHeader title={title} action={action} onAction={onAction} /> : null}
      {children}
    </View>
  );
}

export function Divider({ style }: { style?: StyleProp<ViewStyle> }) {
  return <View style={[{ height: 1, backgroundColor: colors.line }, style]} />;
}

/** Key/value row used for drug facts and order summaries. */
export function InfoRow({
  label,
  value,
  valueColor,
  emphasis,
  last,
}: {
  label: string;
  value: string;
  valueColor?: string;
  emphasis?: boolean;
  last?: boolean;
}) {
  return (
    <View
      style={{
        flexDirection: "row",
        alignItems: "flex-start",
        justifyContent: "space-between",
        gap: 16,
        paddingVertical: 12,
        borderBottomWidth: last ? 0 : 1,
        borderBottomColor: colors.line,
      }}
    >
      <Text variant="bodySm" color={colors.muted}>
        {label}
      </Text>
      <Text
        variant={emphasis ? "h3" : "label"}
        color={valueColor ?? colors.ink}
        style={{ flexShrink: 1, textAlign: "right" }}
      >
        {value}
      </Text>
    </View>
  );
}

/** Tappable settings/menu row with icon tile, title and chevron. */
export function MenuRow({
  icon,
  title,
  subtitle,
  onPress,
  right,
  tone = "brand",
  last,
}: {
  icon: keyof typeof Ionicons.glyphMap;
  title: string;
  subtitle?: string;
  onPress?: () => void;
  right?: ReactNode;
  tone?: "brand" | "danger" | "neutral";
  last?: boolean;
}) {
  const iconBg =
    tone === "danger"
      ? colors.dangerSoft
      : tone === "neutral"
        ? colors.surfaceAlt
        : colors.brandSoft;
  const iconFg =
    tone === "danger" ? colors.danger : tone === "neutral" ? colors.muted : colors.brandText;

  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => ({
        flexDirection: "row",
        alignItems: "center",
        gap: 14,
        paddingVertical: 14,
        paddingHorizontal: space.lg,
        borderBottomWidth: last ? 0 : 1,
        borderBottomColor: colors.line,
        backgroundColor: pressed ? colors.surfaceAlt : "transparent",
      })}
    >
      <View
        style={{
          width: 38,
          height: 38,
          borderRadius: 12,
          backgroundColor: iconBg,
          alignItems: "center",
          justifyContent: "center",
        }}
      >
        <Ionicons name={icon} size={19} color={iconFg} />
      </View>
      <View style={{ flex: 1 }}>
        <Text variant="h3" color={tone === "danger" ? colors.danger : colors.ink}>
          {title}
        </Text>
        {subtitle ? (
          <Text variant="caption" color={colors.subtle} style={{ marginTop: 2 }}>
            {subtitle}
          </Text>
        ) : null}
      </View>
      {right ?? <Ionicons name="chevron-forward" size={18} color={colors.subtle} />}
    </Pressable>
  );
}