// Copyright (c) 2021 DDN. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

mod base_parsers;
pub(crate) mod brw_stats_parser;
pub mod error;
mod lnetctl_parser;
mod mds;
pub mod mgs;
mod node_stats_parsers;
mod osd_parser;
mod oss;
pub mod parser;
pub mod recovery_status_parser;
mod snapshot_time;
mod stats_parser;
mod top_level_parser;
pub mod types;

pub use crate::error::LustreCollectorError;
use combine::parser::EasyParser;
pub use lnetctl_parser::parse as parse_lnetctl_output;
pub use lnetctl_parser::parse_lnetctl_stats;
pub use node_stats_parsers::{parse_cpustats_output, parse_meminfo_output};
use std::{io, str};
pub use types::*;

fn check_output(records: Vec<Record>, state: &str) -> Result<Vec<Record>, LustreCollectorError> {
    if !state.is_empty() {
        return Err(io::Error::new(
            io::ErrorKind::InvalidInput,
            format!("Content left in input buffer: {}", state),
        )
        .into());
    }

    Ok(records)
}

pub fn parse_lctl_output(lctl_output: &[u8]) -> Result<Vec<Record>, LustreCollectorError> {
    let lctl_stats = str::from_utf8(lctl_output)?;

    let (lctl_record, state) = parser::parse()
        .easy_parse(lctl_stats)
        .map_err(|err| err.map_position(|p| p.translate_position(lctl_stats)))?;

    check_output(lctl_record, state)
}

pub fn parse_mgs_fs_output(mgs_fs_output: &[u8]) -> Result<Vec<Record>, LustreCollectorError> {
    let mgs_fs = str::from_utf8(mgs_fs_output)?;

    let (mgs_fs_record, state) = mgs::mgs_fs_parser::parse()
        .easy_parse(mgs_fs)
        .map_err(|err| err.map_position(|p| p.translate_position(mgs_fs)))?;

    check_output(mgs_fs_record, state)
}

pub fn parse_recovery_status_output(
    recovery_status_output: &[u8],
) -> Result<Vec<Record>, LustreCollectorError> {
    let recovery_status = str::from_utf8(recovery_status_output)?;
    let recovery_status = recovery_status.trim();

    let (recovery_statuses, state) = recovery_status_parser::parse()
        .easy_parse(recovery_status)
        .map_err(|err| err.map_position(|p| p.translate_position(recovery_status)))?;

    check_output(recovery_statuses, state)
}
