Menu

import { mount, signal, Text, View } from "nsh";
import { ContextMenu, Menu, MenuItem, MenuSeparator, type OpenChangeReason, Submenu } from "nsh/base";
import { desktop, Inspector, Panel, size, Stage, tint, ui, wide } from "./palette";

/** A popup at the trigger on desktops, a sheet at the bottom on phones. */
const surface = () =>
  desktop
    ? { ...ui().card, borderRadius: 12, padding: 5, minWidth: 210 }
    : { ...ui().card, borderTopLeftRadius: 20, borderTopRightRadius: 20, paddingHorizontal: 10, paddingTop: 10, paddingBottom: 30 };

const backdrop = { backgroundColor: "rgba(0,0,0,0.45)" };
const rowHeight = () => (desktop ? 32 : 46);
const row = () => ({ flexDirection: "row" as const, alignItems: "center" as const, gap: 8, height: rowHeight(), paddingHorizontal: 10, borderRadius: 8 });

function Item(props: { label: string; onSelect?: () => void; checked?: boolean; disabled?: boolean; keepOpen?: boolean; danger?: boolean }) {
  return (
    <MenuItem
      onSelect={props.onSelect}
      disabled={props.disabled}
      closeOnSelect={!props.keepOpen}
      hoverStyle={{ backgroundColor: tint(ui().accent, 0.08), borderColor: tint(ui().accent, 0.24) }}
      activeStyle={{ backgroundColor: tint(ui().accent, 0.14), borderColor: tint(ui().accent, 0.34) }}
      disabledStyle={{ opacity: 0.35 }}
      style={{ ...row(), borderWidth: 1, borderColor: "transparent" }}
    >
      <Text style={{ flex: 1, fontSize: 14, color: props.danger ? ui().down : ui().text }}>{props.label}</Text>
      {/* The check at the trailing edge. */}
      <If when={props.checked !== undefined}>
        <Text style={{ width: 14, fontSize: 13, textAlign: "right", color: ui().accent }}>{props.checked ? "✓" : ""}</Text>
      </If>
    </MenuItem>
  );
}

function Separator() {
  return <MenuSeparator style={{ height: 1, marginVertical: 4, marginHorizontal: 6, backgroundColor: ui().border }} />;
}

function Share(props: { onSelect: (what: string) => void }) {
  return (
    <Submenu
      trigger={
        <View hoverStyle={{ backgroundColor: tint(ui().accent, 0.08), borderColor: tint(ui().accent, 0.24) }} activeStyle={{ backgroundColor: tint(ui().accent, 0.14), borderColor: tint(ui().accent, 0.34) }} style={{ ...row(), borderWidth: 1, borderColor: "transparent" }}>
          <Text style={{ flex: 1, fontSize: 14, color: ui().text }}>Share</Text>
          <Text style={{ fontSize: 14, color: ui().faint }}>›</Text>
        </View>
      }
      back={
        <View activeStyle={{ backgroundColor: tint(ui().accent, 0.14), borderColor: tint(ui().accent, 0.34) }} style={{ ...row(), borderWidth: 1, borderColor: "transparent" }}>
          <Text style={{ fontSize: 14, fontWeight: "600", color: ui().accent }}>‹ Share</Text>
        </View>
      }
    >
      <Item label="Mail" onSelect={() => props.onSelect("Mail")} />
      <Item label="Messages" onSelect={() => props.onSelect("Messages")} />
      <Item label="Copy link" onSelect={() => props.onSelect("Copy link")} />
    </Submenu>
  );
}

function App() {
  const last = signal("—");
  const reasons = signal<string[]>([]);
  const hidden = signal(false);
  const changed = (name: string) => (open: boolean, reason: OpenChangeReason) =>
    reasons.set([`${name} ${open ? "opened" : "closed"} · ${reason}`, ...reasons()].slice(0, 8));
  const choose = (what: string) => last.set(what);
  const menu = () => (
    <Menu
      offset={4}
      margin={8}
      popupStyle={surface()}
      backdropStyle={backdrop}
      onOpenChange={changed("File")}
      trigger={
        <View
          activeStyle={{ opacity: 0.7 }}
          hoverStyle={{ opacity: 0.85 }}
          style={{
            ...ui().raised,
            alignSelf: "flex-start",
            borderRadius: desktop ? 8 : 10,
            paddingHorizontal: desktop ? 12 : 16,
            height: desktop ? size.control : 38,
            justifyContent: "center",
          }}
        >
          <Text style={{ fontSize: desktop ? 13 : 14, fontWeight: "600", color: ui().text }}>File ▾</Text>
        </View>
      }
    >
      <Item label="New" onSelect={() => choose("New")} />
      <Item label="Open…" onSelect={() => choose("Open…")} />
      <Item label="Paste" disabled />
      <Separator />
      <Share onSelect={(what) => choose(`Share › ${what}`)} />
      <Item label="Show hidden files" checked={hidden()} keepOpen onSelect={() => hidden.set(!hidden())} />
      <Separator />
      <Item label="Delete" danger onSelect={() => choose("Delete")} />
    </Menu>
  );
  const context = () => (
    <ContextMenu
      margin={8}
      popupStyle={surface()}
      backdropStyle={backdrop}
      onOpenChange={changed("Context")}
      trigger={
        <View
          style={{
            height: wide() ? 220 : 150,
            borderRadius: 14,
            borderWidth: 2,
            borderStyle: "dashed",
            borderColor: ui().faint,
            alignItems: "center",
            justifyContent: "center",
            gap: 4,
          }}
        >
          <Text style={{ fontSize: 15, fontWeight: "600", color: ui().text }}>ContextMenu</Text>
          <Text style={{ fontSize: 13, color: ui().muted }}>{desktop ? "Right click here" : "Hold a finger here"}</Text>
        </View>
      }
    >
      <Item label="Copy" onSelect={() => choose("Copy")} />
      <Item label="Rename" onSelect={() => choose("Rename")} />
      <Share onSelect={(what) => choose(`Share › ${what}`)} />
      <Separator />
      <Item label="Delete" danger onSelect={() => choose("Delete")} />
    </ContextMenu>
  );
  const panels = () => (
    <>
      <Panel title="onSelect">
        <Text style={{ fontSize: 13, color: ui().text }}>
          {last()} · hidden files {hidden() ? "shown" : "hidden"}
        </Text>
      </Panel>
      <Panel title="onOpenChange(open, reason)" grow>
        <View style={{ gap: 2 }}>
          <Each of={reasons()}>{(e, i) => <Text style={{ fontSize: 12, color: i() === 0 ? ui().text : ui().faint }}>{e()}</Text>}</Each>
        </View>
      </Panel>
    </>
  );
  return (
    <View style={{ flex: 1, backgroundColor: ui().page, padding: 20, paddingTop: 24, gap: 14 }}>
      <Text style={{ fontSize: 22, fontWeight: "700", color: ui().text }}>menu</Text>
      <Text style={{ color: ui().muted }}>
        {desktop ? "Click File; hover Share to open its submenu. Right click the box below it" : "Tap File: a sheet; Share shows its items in place"}
      </Text>

      {() =>
        wide() ? (
          <View style={{ flex: 1, flexDirection: "row", gap: 16 }}>
            <Stage>
              {menu()}
              {context()}
            </Stage>
            <Inspector>{panels()}</Inspector>
          </View>
        ) : (
          <>
            {menu()}
            {context()}
            {panels()}
          </>
        )
      }
    </View>
  );
}

mount(App);