use chrono::DateTime;
use serde::{Deserialize, Serialize};
use teslatte::vehicles::{ChargingState, ShiftState};

use crate::{config::access_config, errors::TeslaStateParseError};

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

impl CarState {
    pub fn is_charging_at_home(&self) -> bool {
        self.charge_state
            .is_some_and(|v| v.charging_state == ChargingState::Charging)
            && self.location_data.is_some_and(|v| v.home)
    }
}

#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
pub struct ClimateState {
    pub inside_temp: f64,
    pub outside_temp: f64,
    pub battery_heater: bool,
    pub climate_on: bool,
    pub preconditioning: bool,
    pub remote_heater_control_enabled: bool,
}

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

    fn try_from(value: teslatte::vehicles::ClimateState) -> Result<Self, Self::Error> {
        Ok(Self {
            inside_temp: value.inside_temp.ok_or(TeslaStateParseError::NoValue)?,
            outside_temp: value.outside_temp.ok_or(TeslaStateParseError::NoValue)?,
            battery_heater: value.battery_heater,
            climate_on: value.is_climate_on,
            preconditioning: value.is_preconditioning,
            remote_heater_control_enabled: value.remote_heater_control_enabled,
        })
    }
}

#[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 charger_connected: bool,
    pub charge_enable_request: bool,
    pub charging_state: ChargingState,
    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,
            charger_connected: value.conn_charge_cable != "<invalid>",
            charge_enable_request: value.charge_enable_request,
            charging_state: value.charging_state,
            charge_limit_soc: value.charge_limit_soc,
        }
    }
}

pub struct FromDriveState(pub LocationData, pub DriveState);

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

#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
pub struct DriveState {
    pub power: i64,
    pub speed: i64,
    pub shift_state: ShiftState,
}

impl TryFrom<teslatte::vehicles::DriveState> for FromDriveState {
    type Error = TeslaStateParseError;

    fn try_from(value: teslatte::vehicles::DriveState) -> Result<Self, Self::Error> {
        let gps_as_of = chrono::DateTime::from_timestamp(
            value.gps_as_of.ok_or(TeslaStateParseError::NoValue)?,
            0,
        )
        .ok_or(TeslaStateParseError::InvalidTimestamp)?;
        let coords = Coords {
            latitude: value.latitude.ok_or(TeslaStateParseError::NoValue)?,
            longitude: value.longitude.ok_or(TeslaStateParseError::NoValue)?,
        };
        let home = coords.overlaps(&access_config().coords);
        let power = value.power;
        let speed = value.speed.unwrap_or(0);
        let shift_state = value.shift_state;
        Ok(Self(
            LocationData { gps_as_of, home },
            DriveState {
                power,
                speed,
                shift_state,
            },
        ))
    }
}

#[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
    }
}