#![deny(warnings)]
mod common;
mod preprocess;
mod route;
use std::path::PathBuf;
use common::find_matches;
use pyo3::exceptions::*;
use pyo3::prelude::*;
use pyo3::types::{PyDict, PyList};

enum SysEntry {
    ID(u32),
    Name(String),
}

impl From<&str> for SysEntry {
    fn from(s: &str) -> SysEntry {
        if let Ok(n) = s.parse() {
            SysEntry::ID(n)
        } else {
            SysEntry::Name(s.to_owned())
        }
    }
}

fn resolve(entries: &Vec<SysEntry>, path: &PathBuf) -> Result<Vec<u32>,String> {
    let mut names: Vec<String> = Vec::new();
    let mut ids: Vec<u32> = Vec::new();
    let mut ret: Vec<u32> = Vec::new();
    for ent in entries {
        match ent {
            SysEntry::Name(name) => names.push(name.to_owned()),
            SysEntry::ID(id) => ids.push(*id),
        }
    };
    let name_ids = find_matches(path, names, false)?;
    for ent in entries {
        match ent {
            SysEntry::Name(name) => {
                let ent_res=name_ids.get(&name.to_owned()).ok_or(format!("System {} not found",name))?;
                let sys=ent_res.1.as_ref().ok_or(format!("System {} not found",name))?;
                if ent_res.0<0.75 {
                    println!("WARNING: {} match to {} with low confidence ({}%)",name,sys.system,ent_res.0*100.0);
                }
                ret.push(sys.id);
            }
            SysEntry::ID(id) => ret.push(*id),
        }
    }
    return Ok(ret);
}

#[pymodule]
pub fn _ed_lrr(_py: Python, m: &PyModule) -> PyResult<()> {
    better_panic::install();
    /// preprocess(infile_systems, infile_bodies, outfile, callback)
    /// --
    ///
    /// Preprocess bodies.json and systemsWithCoordinates.json into stars.csv
    #[pyfn(m, "preprocess")]
    fn ed_lrr_preprocess(
        py: Python<'static>,
        infile_systems: String,
        infile_bodies: String,
        outfile: String,
        callback: PyObject,
    ) -> PyResult<PyObject> {
        use preprocess::*;
        let state = PyDict::new(py);
        let state_dict = PyDict::new(py);
        callback.call(py, (state_dict,), None).unwrap();
        let callback_wrapped = move |state: &PreprocessState| {
            // println!("SEND: {:?}",state);
            state_dict.set_item("file", state.file.clone())?;
            state_dict.set_item("total", state.total)?;
            state_dict.set_item("count", state.count)?;
            state_dict.set_item("done", state.done)?;
            state_dict.set_item("message", state.message.clone())?;
            callback.call(py, (state_dict,), None)
        };
        preprocess_files(
            &PathBuf::from(infile_bodies),
            &PathBuf::from(infile_systems),
            &PathBuf::from(outfile),
            &callback_wrapped,
        )
        .unwrap();
        Ok(state.to_object(py))
    }

    ///find_sys(sys_names, sys_list_path)
    /// --
    ///
    /// Find system by name
    #[pyfn(m, "find_sys")]
    fn find_sys(py: Python, sys_names: Vec<String>, sys_list: String) -> PyResult<PyObject> {
        let path = PathBuf::from(sys_list);
        match find_matches(&path, sys_names,false) {
            Ok(vals) => {
                let ret = PyDict::new(py);
                for (key, (diff, sys)) in vals {
                    let ret_dict = PyDict::new(py);
                    if let Some(val) = sys {
                        let pos = PyList::new(py, val.pos.iter());
                        ret_dict.set_item("star_type", val.star_type.clone())?;
                        ret_dict.set_item("system", val.system.clone())?;
                        ret_dict.set_item("body", val.body.clone())?;
                        ret_dict.set_item("distance", val.distance)?;
                        ret_dict.set_item("pos", pos)?;
                        ret_dict.set_item("id", val.id)?;
                        ret.set_item(key, (diff, ret_dict).to_object(py))?;
                    }
                }
                Ok(ret.to_object(py))
            }
            Err(e) => Err(PyErr::new::<ValueError, _>(e)),
        }
    }

    /// route(hops, range, prune, mode, primary, permute, keep_first, keep_last, greedyness, precomp, path, num_workers, callback)
    /// --
    ///
    /// Compute a Route using the suplied parameters
    #[pyfn(m, "route")]
    #[allow(clippy::too_many_arguments)]
    fn py_route(
        py: Python<'static>,
        hops: Vec<&str>,
        range: f32,
        prune: Option<(usize, f32)>,
        mode: String,
        primary: bool,
        permute: bool,
        keep_first: bool,
        keep_last: bool,
        greedyness: Option<f32>,
        precomp: Option<String>,
        path: String,
        num_workers: Option<usize>,
        callback: PyObject,
    ) -> PyResult<PyObject> {
        use route::*;
        let num_workers=num_workers.unwrap_or(1);
        let mode = match Mode::parse(&mode) {
            Ok(val) => val,
            Err(e) => {
                return Err(PyErr::new::<ValueError, _>(e));
            }
        };
        let state_dict = PyDict::new(py);
        {
            let cb_res = callback.call(py, (state_dict,), None);
            if cb_res.is_err() {
                println!("Error: {:?}",cb_res);
            }
        }
        let callback_wrapped = move |state: &SearchState| {
            state_dict.set_item("mode", state.mode.clone())?;
            state_dict.set_item("system", state.system.clone())?;
            state_dict.set_item("body", state.body.clone())?;
            state_dict.set_item("depth", state.depth)?;
            state_dict.set_item("queue_size", state.queue_size)?;
            state_dict.set_item("d_rem", state.d_rem)?;
            state_dict.set_item("d_total", state.d_total)?;
            state_dict.set_item("prc_done", state.prc_done)?;
            state_dict.set_item("n_seen", state.n_seen)?;
            state_dict.set_item("prc_seen", state.prc_seen)?;
            state_dict.set_item("from", state.from.clone())?;
            state_dict.set_item("to", state.to.clone())?;
            let cb_res=callback.call(py, (state_dict,), None);
            if cb_res.is_err() {
                println!("Error: {:?}",cb_res);
            }
            cb_res
        };
        let hops: Vec<SysEntry> = hops.iter().cloned().map(SysEntry::from).collect();
        println!("Resolving systems...");
        let hops: Vec<u32> = match resolve(&hops,&PathBuf::from(&path)) {
            Ok(ids) => ids,
            Err(err_msg) => {
                return Err(PyErr::new::<ValueError, _>(err_msg));
            }
        };
        let opts = RouteOpts {
            systems: hops,
            range: Some(range),
            file_path: PathBuf::from(path),
            precomp_file: precomp.map(PathBuf::from),
            callback: Box::new(callback_wrapped),
            mode,
            factor: greedyness,
            precompute: false,
            permute,
            keep_first,
            keep_last,
            primary,
            prune,
            workers: num_workers
        };
        let none = ().to_object(py);
        match route(opts) {
            Ok(Some(route)) => {
                let hops = route.iter().map(|hop| {
                    let pos = PyList::new(py, hop.pos.iter());
                    let elem = PyDict::new(py);
                    elem.set_item("star_type", hop.star_type.clone()).unwrap();
                    elem.set_item("system", hop.system.clone()).unwrap();
                    elem.set_item("body", hop.body.clone()).unwrap();
                    elem.set_item("distance", hop.distance).unwrap();
                    elem.set_item("pos", pos).unwrap();
                    elem
                });
                let lst = PyList::new(py, hops);
                Ok(lst.to_object(py))
            }
            Ok(None) => Ok(none),
            Err(e) => Err(PyErr::new::<ValueError, _>(e)),
        }
    }
    Ok(())
}