this_algorithm/xpin-wasm/src/lib.rs

use std::str::FromStr;

use spatial_coordinate_systems::{Coordinate, LatLon};
use wasm_bindgen::prelude::*;
use xpin::Address;

#[wasm_bindgen]
#[derive(Debug, Copy, Clone)]
pub enum CoordinateType {
    DD,
    DMS,
    DMM,
    UTM,
    // Xpin,
    Plus,
}

impl From<CoordinateType> for spatial_coordinate_systems::CoordinateType {
    fn from(val: CoordinateType) -> Self {
        match val {
            CoordinateType::DD => Self::DD,
            CoordinateType::DMS => Self::DMS,
            CoordinateType::DMM => Self::DMM,
            CoordinateType::UTM => Self::UTM,
            // CoordinateType::Xpin => Self::Xpin,
            CoordinateType::Plus => Self::Plus,
        }
    }
}

impl From<spatial_coordinate_systems::CoordinateType> for CoordinateType {
    fn from(value: spatial_coordinate_systems::CoordinateType) -> CoordinateType {
        match value {
            spatial_coordinate_systems::CoordinateType::DD => Self::DD,
            spatial_coordinate_systems::CoordinateType::DMS => Self::DMS,
            spatial_coordinate_systems::CoordinateType::DMM => Self::DMM,
            spatial_coordinate_systems::CoordinateType::UTM => Self::UTM,
            // spatial_coordinate_systems::CoordinateType::Xpin => Self::Xpin,
            spatial_coordinate_systems::CoordinateType::Plus => Self::Plus,
        }
    }
}

#[wasm_bindgen(getter_with_clone)]
pub struct EncodedAddress {
    pub address: String,
    /// The coordinates used to encode this address
    src_coords: Coordinate,
    #[wasm_bindgen(js_name = srcCoordsRepr)]
    pub src_coords_repr: String,
    #[wasm_bindgen(js_name = srcCoordsType)]
    pub src_coords_type: CoordinateType,
    #[wasm_bindgen(js_name = latLon)]
    pub lat_lon: Box<[f64]>,

    #[wasm_bindgen(js_name = decimalDegrees)]
    pub decimal_degrees: String,
}

#[wasm_bindgen]
impl EncodedAddress {
    /// Get the string representation of the encoded value
    #[wasm_bindgen]
    // TODO: Do not return option
    pub fn get_coords_repr_as(&self, coordinate_type: CoordinateType) -> Option<String> {
        self.src_coords
            // TODO: Remove the clone here
            .clone()
            .as_type(&coordinate_type.into())
            .ok()
            .map(|s| s.to_string())
    }

    /// Get an encoded address from a latitude/longitude
    #[wasm_bindgen]
    pub fn from_lat_lon(lat: f64, lon: f64) -> Result<EncodedAddress, String> {
        Self::try_from(
            xpin::Address::from_lat_lon(lat, lon)
                .as_ref()
                .map_err(|e| e.to_string())?,
        )
        .map_err(|e| e.to_string())
    }

    /// Get an encoded address from a latitude/longitude
    #[wasm_bindgen]
    pub fn from_coordinate(i: &str) -> Result<EncodedAddress, String> {
        console_error_panic_hook::set_once();

        let src_coords = Coordinate::from_str(i)
            .map_err(|e| format!("Could not parse str {i:?} as a coordinate {e:?}"))?;

        // TODO: Remove the clone here
        let latlon = LatLon::from(&src_coords);

        let mut ret = Self::try_from(
            xpin::Address::from_lat_lon(latlon.get_lat(), latlon.get_lon())
                .as_ref()
                .map_err(|e| e.to_string())?,
        )
        .map_err(|e| e.to_string())?;

        ret.src_coords_repr = src_coords.to_string();
        ret.src_coords_type = src_coords.get_type().into();
        ret.src_coords = src_coords;

        Ok(ret)
    }

    #[wasm_bindgen]
    pub fn from_address(addr_str: &str) -> Result<EncodedAddress, String> {
        Self::try_from(
            xpin::Address::from_str(addr_str)
                .as_ref()
                .map_err(|e| e.to_string())?,
        )
        .map_err(|e| e.to_string())
    }
}

impl TryFrom<&'_ Address<'_>> for EncodedAddress {
    type Error = String;

    fn try_from(addr: &Address) -> Result<Self, Self::Error> {
        console_error_panic_hook::set_once();

        let (lat, lon) = addr.as_lat_lon();
        // TODO: Do not allocate a string here
        let src_coords =
            Coordinate::from_str(&format!("{}, {}", lat, lon)).map_err(|e| e.to_string())?;

        Ok(Self {
            address: addr.to_string(),
            lat_lon: Box::new([lat, lon]),
            src_coords_repr: src_coords.to_string(),
            src_coords_type: src_coords.get_type().into(),
            src_coords,
            decimal_degrees: format!("{}, {}", lat, lon),
        })
    }
}

// #[cfg(test)]
// mod tests {
//     use super::*;

//     #[test]
//     fn test_general() {
//         super::from_address("6532 BROADCAST TINY apple")
//     }
// }