package wincmd

import "time"

func waitUntil(timeout time.Duration, interval time.Duration, timeoutMsg string, check func() (bool, error)) error {
	if timeout <= 0 {
		timeout = time.Second
	}
	return waitUntilStrict(timeout, interval, timeoutMsg, check)
}

func waitUntilStrict(timeout time.Duration, interval time.Duration, timeoutMsg string, check func() (bool, error)) error {
	if timeout <= 0 {
		done, err := check()
		if err != nil {
			return err
		}
		if done {
			return nil
		}
		if timeoutMsg == "" {
			timeoutMsg = "wait condition timeout"
		}
		return wrapTimeoutError(timeoutMsg)
	}
	if interval <= 0 {
		interval = 10 * time.Millisecond
	}

	deadline := time.Now().Add(timeout)
	for {
		done, err := check()
		if err != nil {
			return err
		}
		if done {
			return nil
		}
		if time.Now().After(deadline) {
			if timeoutMsg == "" {
				timeoutMsg = "wait condition timeout"
			}
			return wrapTimeoutError(timeoutMsg)
		}
		time.Sleep(interval)
	}
}