formatparse-pyo3 0.8.1

use crate::datetime::common::get_abbreviated_month_map;
use once_cell::sync::Lazy;
use pyo3::prelude::*;
use pyo3::IntoPyObjectExt;
use regex::Regex;

// Cached regex pattern for ctime datetime parsing
static RE_CTIME_DATETIME: Lazy<Regex> = Lazy::new(|| {
    Regex::new(r"^(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(\d{1,2})\s+(\d{2}):(\d{2}):(\d{2})\s+(\d{4})$").unwrap()
});

/// Parse ctime() format: Mon Nov 21 10:21:36 2011
pub fn parse_ctime_datetime(py: Python, value: &str) -> PyResult<PyObject> {
    let datetime_module = py.import("datetime")?;
    let datetime_class = datetime_module.getattr("datetime")?;

    let month_map = get_abbreviated_month_map();

    if let Some(caps) = RE_CTIME_DATETIME.captures(value) {
        if let (
            Some(month_match),
            Some(day_match),
            Some(hour_match),
            Some(minute_match),
            Some(second_match),
            Some(year_match),
        ) = (
            caps.get(1),
            caps.get(2),
            caps.get(3),
            caps.get(4),
            caps.get(5),
            caps.get(6),
        ) {
            let month_name = month_match.as_str();
            let month = *month_map.get(month_name).ok_or_else(|| {
                PyErr::new::<pyo3::exceptions::PyValueError, _>(format!(
                    "Invalid month: {}",
                    month_name
                ))
            })?;
            let day: u8 = day_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid day"))?;
            let hour: u8 = hour_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid hour"))?;
            let minute: u8 = minute_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid minute"))?;
            let second: u8 = second_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid second"))?;
            let year: i32 = year_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid year"))?;

            let dt =
                datetime_class.call1((year, month, day, hour, minute, second, 0, py.None()))?;
            return dt.into_py_any(py);
        }
    }

    Err(PyErr::new::<pyo3::exceptions::PyValueError, _>(format!(
        "Invalid ctime datetime: {}",
        value
    )))
}