use pyo3::import_exception;

use pyo3::{create_exception, PyErr};

use crate::revision::PyRevision;

create_exception!(pyo3_rustext, GraphError, PyValueError);

import_exception!(mercurial.error, WdirUnsupported);

impl GraphError {

    pub fn from_hg(inner: hg::GraphError) -> PyErr {

        match inner {

            hg::GraphError::ParentOutOfRange(r) => {

                GraphError::new_err(("ParentOutOfRange", PyRevision(r.0)))

            }

        }

    }

    pub fn from_vcsgraph(inner: vcsgraph::graph::GraphReadError) -> PyErr {

        match inner {

            vcsgraph::graph::GraphReadError::InconsistentGraphData => {

                GraphError::new_err("InconsistentGraphData")

            }

            vcsgraph::graph::GraphReadError::InvalidKey => {

                GraphError::new_err("ParentOutOfRange")

            }

            vcsgraph::graph::GraphReadError::KeyedInvalidKey(r) => {

                GraphError::new_err(("ParentOutOfRange", r))

            }

            vcsgraph::graph::GraphReadError::WorkingDirectoryUnsupported => {

                WdirUnsupported::new_err(())

            }

        }

    }

}