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use crate::bucket::{Bucket, Request};
use crate::command::Command;
use crate::error::S3Error;
use crate::request::RequestImpl;

impl Bucket {
    /// Copy file from an S3 path, internally within the same bucket.
    ///
    /// # Example:
    ///
    /// ```rust,no_run
    /// use s3::bucket::Bucket;
    /// use s3::creds::Credentials;
    /// use anyhow::Result;
    ///
    /// # #[tokio::main]
    /// # async fn main() -> Result<()> {
    ///
    /// let bucket_name = "rust-s3-test";
    /// let region = "us-east-1".parse()?;
    /// let credentials = Credentials::default()?;
    /// let bucket = Bucket::new(bucket_name, region, credentials)?;
    ///
    /// let code = bucket.copy_object_internal("/from.file", "/to.file").await?;
    ///
    /// # Ok(())
    /// # }
    /// ```
    pub async fn copy_object_internal<F: AsRef<str>, T: AsRef<str>>(
        &self,
        from: F,
        to: T,
    ) -> Result<u16, S3Error> {
        let fq_from = {
            let from = from.as_ref();
            let from = from.strip_prefix('/').unwrap_or(from);
            format!("{bucket}/{path}", bucket = self.name(), path = from)
        };
        self.copy_object(fq_from, to).await
    }

    async fn copy_object<F: AsRef<str>, T: AsRef<str>>(
        &self,
        from: F,
        to: T,
    ) -> Result<u16, S3Error> {
        let command = Command::CopyObject {
            from: from.as_ref(),
        };
        let request = RequestImpl::new(self, to.as_ref(), command)?;
        let response_data = request.response_data(false).await?;
        Ok(response_data.status_code())
    }
}