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use crate::controldir::Prober;
use pyo3::exceptions::PyModuleNotFoundError;
use pyo3::prelude::*;

pub mod tree;

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct FileId(Vec<u8>);

impl Default for FileId {
    fn default() -> Self {
        Self::new()
    }
}

impl FileId {
    pub fn new() -> Self {
        Self(vec![])
    }
}

impl From<&str> for FileId {
    fn from(s: &str) -> Self {
        Self(s.as_bytes().to_vec())
    }
}

impl From<String> for FileId {
    fn from(s: String) -> Self {
        Self(s.into_bytes())
    }
}

impl From<&[u8]> for FileId {
    fn from(s: &[u8]) -> Self {
        Self(s.to_vec())
    }
}

impl From<Vec<u8>> for FileId {
    fn from(s: Vec<u8>) -> Self {
        Self(s)
    }
}

impl From<FileId> for Vec<u8> {
    fn from(s: FileId) -> Self {
        s.0
    }
}

impl From<FileId> for String {
    fn from(s: FileId) -> Self {
        String::from_utf8(s.0).unwrap()
    }
}

impl pyo3::ToPyObject for FileId {
    fn to_object(&self, py: Python) -> PyObject {
        self.0.to_object(py)
    }
}

impl pyo3::FromPyObject<'_> for FileId {
    fn extract_bound(ob: &Bound<PyAny>) -> PyResult<Self> {
        let bytes = ob.extract::<Vec<u8>>()?;
        Ok(Self(bytes))
    }
}

impl pyo3::IntoPy<pyo3::PyObject> for FileId {
    fn into_py(self, py: Python) -> pyo3::PyObject {
        self.0.to_object(py)
    }
}

pub fn gen_revision_id(username: &str, timestamp: Option<usize>) -> Vec<u8> {
    Python::with_gil(|py| {
        let m = py.import_bound("breezy.bzr.generate_ids").unwrap();
        let gen_revision_id = m.getattr("gen_revision_id").unwrap();
        gen_revision_id
            .call1((username, timestamp))
            .unwrap()
            .extract()
            .unwrap()
    })
}

#[test]
fn test_gen_revision_id() {
    gen_revision_id("user", None);
}

pub fn gen_file_id(name: &str) -> Vec<u8> {
    Python::with_gil(|py| {
        let m = py.import_bound("breezy.bzr.generate_ids").unwrap();
        let gen_file_id = m.getattr("gen_file_id").unwrap();
        gen_file_id.call1((name,)).unwrap().extract().unwrap()
    })
}

#[test]
fn test_file_id() {
    gen_file_id("somename");
}

pub struct RemoteBzrProber(PyObject);

impl RemoteBzrProber {
    pub fn new() -> Option<Self> {
        Python::with_gil(|py| {
            let m = match py.import_bound("breezy.bzr") {
                Ok(m) => m,
                Err(e) => {
                    if e.is_instance_of::<PyModuleNotFoundError>(py) {
                        return None;
                    } else {
                        e.print_and_set_sys_last_vars(py);
                        panic!("Failed to import breezy.bzr");
                    }
                }
            };
            let prober = m
                .getattr("RemoteBzrProber")
                .expect("Failed to get RemoteBzrProber");
            Some(Self(prober.to_object(py)))
        })
    }
}

impl FromPyObject<'_> for RemoteBzrProber {
    fn extract_bound(obj: &Bound<PyAny>) -> PyResult<Self> {
        Ok(Self(obj.to_object(obj.py())))
    }
}

impl ToPyObject for RemoteBzrProber {
    fn to_object(&self, py: Python) -> PyObject {
        self.0.to_object(py)
    }
}

impl Prober for RemoteBzrProber {}