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//   http://www.apache.org/licenses/LICENSE-2.0
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//! This module contains utilities to manipulate avro metadata.

#[cfg(feature = "avro")]
mod arrow_array_reader;
#[cfg(feature = "avro")]
mod reader;
#[cfg(feature = "avro")]
mod schema;

use crate::arrow::datatypes::Schema;
use crate::error::Result;
#[cfg(feature = "avro")]
pub use reader::{Reader, ReaderBuilder};
use std::io::Read;

#[cfg(feature = "avro")]
/// Read Avro schema given a reader
pub fn read_avro_schema_from_reader<R: Read>(reader: &mut R) -> Result<Schema> {
    let avro_reader = avro_rs::Reader::new(reader)?;
    let schema = avro_reader.writer_schema();
    schema::to_arrow_schema(schema)
}

#[cfg(not(feature = "avro"))]
/// Read Avro schema given a reader (requires the avro feature)
pub fn read_avro_schema_from_reader<R: Read>(_: &mut R) -> Result<Schema> {
    Err(crate::error::DataFusionError::NotImplemented(
        "cannot read avro schema without the 'avro' feature enabled".to_string(),
    ))
}
