use anyhow::Context;
use chrono::DateTime;
use serde::{Deserialize, Serialize};

#[derive(Default)]
pub struct CarState {
    pub charge_state: Option<ChargeState>,
    pub location_data: Option<LocationData>,
    pub climate_state: Option<ClimateState>,
}

#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
pub struct ClimateState {
    pub inside_temp: f64,
}

impl TryFrom<teslatte::vehicles::ClimateState> for ClimateState {
    type Error = anyhow::Error;

    fn try_from(value: teslatte::vehicles::ClimateState) -> Result<Self, Self::Error> {
        Ok(Self {
            inside_temp: value
                .inside_temp
                .context("no temperature in climate data")?,
        })
    }
}

#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
pub struct ChargeState {
    pub battery_level: i64,
    pub battery_range: f64,
    pub charge_amps: i64,
    pub charge_rate: f64,
    pub charge_current_request: i64,
    pub charge_current_request_max: i64,
    pub charge_enable_request: bool,
    pub charge_limit_soc: i64,
}

impl ChargeState {
    #[allow(unused)]
    pub fn range_km(&self) -> f64 {
        self.battery_range * 1.60934
    }
}

impl From<teslatte::vehicles::ChargeState> for ChargeState {
    fn from(value: teslatte::vehicles::ChargeState) -> Self {
        ChargeState {
            battery_level: value.battery_level,
            battery_range: value.battery_range,
            charge_amps: value.charge_amps,
            charge_rate: value.charge_rate,
            charge_current_request: value.charge_current_request,
            charge_current_request_max: value.charge_current_request_max,
            charge_enable_request: value.charge_enable_request,
            charge_limit_soc: value.charge_limit_soc,
        }
    }
}

#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
pub struct LocationData {
    pub coords: Coords,
    pub gps_as_of: DateTime<chrono::Utc>,
}

impl TryFrom<teslatte::vehicles::DriveState> for LocationData {
    type Error = anyhow::Error;

    fn try_from(value: teslatte::vehicles::DriveState) -> Result<Self, Self::Error> {
        let gps_as_of =
            chrono::DateTime::from_timestamp(value.gps_as_of.context("no gps timestamp!")?, 0)
                .context("could not process timestamp!")?;
        let coords = Coords {
            latitude: value.latitude.context("no longitude provided!")?,
            longitude: value.longitude.context("no latitude provided!")?,
        };
        Ok(Self { coords, gps_as_of })
    }
}

#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
pub struct Coords {
    pub latitude: f64,
    pub longitude: f64,
}

const COORD_PRECISION: f64 = 0.001;

impl Coords {
    pub fn overlaps(&self, other: &Coords) -> bool {
        (self.latitude - other.latitude).abs() < COORD_PRECISION
            && (self.longitude - other.longitude).abs() < COORD_PRECISION
    }
}