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use crate::requests::*;
use crate::types::*;

/// Use this method to get basic info about a file and prepare it for downloading.
/// For the moment, bots can download files of up to 20MB in size.
#[derive(Debug, Clone, PartialEq, PartialOrd, Serialize)]
#[must_use = "requests do nothing unless sent"]
pub struct GetFile {
    file_id: FileRef,
}

impl<'s> Request for GetFile {
    type Type = JsonRequestType<Self>;
    type Response = JsonIdResponse<File>;

    fn serialize(&self) -> Result<HttpRequest, Error> {
        Self::Type::serialize(RequestUrl::method("getFile"), self)
    }
}

impl GetFile {
    pub fn new<F>(file: F) -> Self
    where
        F: ToFileRef,
    {
        Self {
            file_id: file.to_file_ref(),
        }
    }
}

/// Get basic info about a file and prepare it for downloading.
pub trait CanGetFile {
    fn get_file(&self) -> GetFile;
}

impl<F> CanGetFile for F
where
    F: ToFileRef,
{
    fn get_file(&self) -> GetFile {
        GetFile::new(self)
    }
}