import { useEffect } from 'react';
import { useAtomValue } from 'jotai';
import { callEmbedAtom } from '../state/callEmbed';
import { invokeTauri } from './useTauri';

/**
 * P5-46 — keep the system awake during calls (call continuity). Mirrors the
 * call-embed atom (undefined = no active call) onto the native `set_call_active`
 * command, which holds a `SetThreadExecutionState` request on Windows while a
 * voice/video call is active and releases it when the call ends. No-op in the
 * browser.
 */
export function useTauriCallPower(): void {
  const callEmbed = useAtomValue(callEmbedAtom);
  useEffect(() => {
    invokeTauri('set_call_active', { active: callEmbed !== undefined });
    // #76 — if the shell unmounts while a call is still active (forced
    // reload/HMR, or a future teardown path that doesn't end the call first),
    // release the native keep-awake state instead of leaving it held forever.
    return () => {
      invokeTauri('set_call_active', { active: false });
    };
  }, [callEmbed]);
}