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use crate::prelude::*;

pub(crate) fn new_chunks(chunks: &mut Vec<ArrayRef>, other: &[ArrayRef], len: usize) {
    // replace an empty array
    if chunks.len() == 1 && len == 0 {
        *chunks = other.to_owned();
    } else {
        chunks.extend_from_slice(other);
    }
}

impl<T> ChunkedArray<T>
where
    T: PolarsNumericType,
{
    /// Append in place. This is done by adding the chunks of `other` to this [`ChunkedArray`].
    ///
    /// See also [`extend`](Self::extend) for appends to the underlying memory
    pub fn append(&mut self, other: &Self) {
        let len = self.len();
        new_chunks(&mut self.chunks, &other.chunks, len);
    }
}

#[doc(hidden)]
impl BooleanChunked {
    pub fn append(&mut self, other: &Self) {
        let len = self.len();
        new_chunks(&mut self.chunks, &other.chunks, len);
    }
}
#[doc(hidden)]
impl Utf8Chunked {
    pub fn append(&mut self, other: &Self) {
        let len = self.len();
        new_chunks(&mut self.chunks, &other.chunks, len);
    }
}

#[doc(hidden)]
impl ListChunked {
    pub fn append(&mut self, other: &Self) {
        let len = self.len();
        new_chunks(&mut self.chunks, &other.chunks, len);
    }
}
#[cfg(feature = "object")]
#[doc(hidden)]
impl<T: PolarsObject> ObjectChunked<T> {
    pub fn append(&mut self, other: &Self) {
        let len = self.len();
        new_chunks(&mut self.chunks, &other.chunks, len);
    }
}