For the function \( f(x) = (\cos x) - x + 1, \ x \in \mathbb{R} \), between the following two statements:
Statement-1 : \( f(x) = 0 \) for only one value of \( x \) in \( [0, \pi] \).
Statement-2 : \( f(x) \) is decreasing in \( [0, \frac{\pi}{2}] \) and increasing in \( [\frac{\pi}{2}, \pi] \).