import { createContext, createMemo, useContext } from "solid-js";
import { createPopupCore } from "../internals/create-popup-core.jsx";
import { readOption } from "../internals/maybe-accessor.jsx";
import { SNAPSHOT_KEYS, snapshotKeys } from "../internals/observability/snapshot.jsx";

/**
 * Why the popover's open state changed.
 *
 * - `"trigger-press"` — trigger was clicked or keyboard-activated.
 * - `"escape-key"` — Escape dismissed the popover.
 * - `"outside-press"` — pointer pressed outside.
 * - `"close-button"` — `<Popover.Close>` was pressed.
 * - `"imperative"` — `p.setOpen()` called programmatically.
 */

/**
 * Options for {@link createPopover}.
 */

/**
 * Public API returned by {@link createPopover}.
 */

const PopoverContext = createContext(null);

/**
 * Read the nearest {@link PopoverApi}. Throws unless `optional` is true.
 */

export function usePopover(optional) {
  const ctx = useContext(PopoverContext);
  if (ctx == null && !optional) {
    throw new Error("Base UI: usePopover() must be called inside a <p.Provider>.");
  }
  return ctx;
}

/**
 * Headless primitive for a popover compound. Owns logical state — open,
 * disabled, modal kind. DOM machinery lives in `<Popover.Root>`.
 */
export function createPopover(options) {
  const core = createPopupCore({
    open: options.open,
    disabled: options.disabled,
    onOpenChange: options.onOpenChange
  });
  const modal = createMemo(() => readOption(options.modal) ?? false, {
    name: "popover.modal"
  });
  const api = {
    open: core.open,
    disabled: core.disabled,
    modal,
    setOpen: core.setOpen,
    toggle: core.toggle,
    Provider: props => <PopoverContext value={api}>{props.children}</PopoverContext>
  };
  api[SNAPSHOT_KEYS] = POPOVER_SNAPSHOT_KEYS;
  return api;
}
const POPOVER_SNAPSHOT_KEYS = snapshotKeys("open", "disabled", "modal");
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