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/*
Copyright 2020 Timo Saarinen

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
use super::*;

/// VTG - track made good and speed over ground
#[derive(Clone, Debug, PartialEq)]
pub struct VtgData {
    /// Navigation system
    pub source: NavigationSystem,

    /// Course over ground (CoG), degrees True
    pub cog_true: Option<f64>,

    /// Course over ground (CoG), degrees Magnetic
    pub cog_magnetic: Option<f64>,

    /// Speed over ground (SoG), knots
    pub sog_knots: Option<f64>,

    /// Speed over ground (SoG), km/h
    pub sog_kph: Option<f64>,

    /// FAA mode indicator
    pub faa_mode: Option<FaaMode>,
}

// -------------------------------------------------------------------------------------------------

/// xxVTG: Track Made Good and Ground Speed
pub(crate) fn handle(
    sentence: &str,
    nav_system: NavigationSystem,
) -> Result<ParsedMessage, ParseError> {
    let split: Vec<&str> = sentence.split(',').collect();

    Ok(ParsedMessage::Vtg(VtgData {
        source: nav_system,
        cog_true: pick_number_field(&split, 1).ok().unwrap_or(None),
        cog_magnetic: pick_number_field(&split, 3).ok().unwrap_or(None),
        sog_knots: pick_number_field(&split, 5).ok().unwrap_or(None),
        sog_kph: pick_number_field(&split, 7).ok().unwrap_or(None),
        faa_mode: FaaMode::new(split.get(9).unwrap_or(&"")).ok(),
    }))
}

// -------------------------------------------------------------------------------------------------

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

    #[test]
    fn test_parse_bdvtg() {
        let mut p = NmeaParser::new();
        match p.parse_sentence("$BDVTG,054.7,T,034.4,M,005.5,N,010.2,K,D*31") {
            Ok(ps) => {
                match ps {
                    // The expected result
                    ParsedMessage::Vtg(vtg) => {
                        assert_eq!(vtg.source, NavigationSystem::Beidou);
                        assert::close(vtg.cog_true.unwrap_or(0.0), 54.7, 0.1);
                        assert::close(vtg.cog_magnetic.unwrap_or(0.0), 34.4, 0.1);
                        assert::close(vtg.sog_knots.unwrap_or(0.0), 5.5, 0.1);
                        assert::close(vtg.sog_kph.unwrap_or(0.0), 10.2, 0.1);
                        assert_eq!(vtg.faa_mode, Some(FaaMode::Differential));
                    }
                    _ => {
                        assert!(false);
                    }
                }
            }
            Err(e) => {
                assert_eq!(e.to_string(), "OK");
            }
        }
    }
}