use super::{DeleteFileData, FileHost, FileHostingError, UploadFileData};
use async_trait::async_trait;

pub struct MockHost(());

impl MockHost {
    pub fn new() -> Self {
        MockHost(())
    }
}

#[async_trait]
impl FileHost for MockHost {
    async fn upload_file(
        &self,
        content_type: &str,
        file_name: &str,
        file_bytes: Vec<u8>,
    ) -> Result<UploadFileData, FileHostingError> {
        let path = std::path::Path::new(&dotenv::var("MOCK_FILE_PATH").unwrap())
            .join(file_name.replace("../", ""));
        std::fs::create_dir_all(path.parent().ok_or(FileHostingError::InvalidFilename)?)?;
        let content_sha1 = sha1::Sha1::from(&file_bytes).hexdigest();

        std::fs::write(path, &file_bytes)?;
        Ok(UploadFileData {
            file_id: String::from("MOCK_FILE_ID"),
            file_name: file_name.to_string(),
            content_length: file_bytes.len() as u32,
            content_sha1,
            content_md5: None,
            content_type: content_type.to_string(),
            upload_timestamp: chrono::Utc::now().timestamp_millis() as u64,
        })
    }

    async fn delete_file_version(
        &self,
        file_id: &str,
        file_name: &str,
    ) -> Result<DeleteFileData, FileHostingError> {
        let path = std::path::Path::new(&dotenv::var("MOCK_FILE_PATH").unwrap())
            .join(file_name.replace("../", ""));
        std::fs::remove_file(path)?;

        Ok(DeleteFileData {
            file_id: file_id.to_string(),
            file_name: file_name.to_string(),
        })
    }
}