use crate::constants;
use crate::devices::device::{Device, DeviceId, DeviceInfo};
use crate::devices::devices_list::DevicesList;
use crate::energy::consumption;
use crate::energy::consumption::EnergyConsumption;
use actix::prelude::*;
use openssl::x509::X509Req;

pub struct EnergyActor {
    curr_consumption: EnergyConsumption,
    devices: DevicesList,
}

impl EnergyActor {
    pub async fn new() -> anyhow::Result<Self> {
        Ok(Self {
            curr_consumption: consumption::get_curr_consumption().await?,
            devices: DevicesList::load()?,
        })
    }

    async fn refresh(&mut self) -> anyhow::Result<()> {
        // Refresh energy
        self.curr_consumption = consumption::get_curr_consumption()
            .await
            .unwrap_or_else(|e| {
                log::error!(
                    "Failed to fetch latest consumption value, will use fallback value! {e}"
                );
                constants::FALLBACK_PRODUCTION_VALUE
            });

        Ok(())
    }
}

impl Actor for EnergyActor {
    type Context = Context<Self>;

    fn started(&mut self, ctx: &mut Self::Context) {
        log::info!("Energy actor successfully started!");

        ctx.run_interval(constants::ENERGY_REFRESH_INTERVAL, |act, _ctx| {
            log::info!("Performing energy refresh operation");
            if let Err(e) = futures::executor::block_on(act.refresh()) {
                log::error!("Energy refresh failed! {e}")
            }
        });
    }

    fn stopped(&mut self, _ctx: &mut Self::Context) {
        log::info!("Energy actor successfully stopped!");
    }
}

pub type EnergyActorAddr = Addr<EnergyActor>;

/// Get current consumption
#[derive(Message)]
#[rtype(result = "EnergyConsumption")]
pub struct GetCurrConsumption;

impl Handler<GetCurrConsumption> for EnergyActor {
    type Result = EnergyConsumption;

    fn handle(&mut self, _msg: GetCurrConsumption, _ctx: &mut Context<Self>) -> Self::Result {
        self.curr_consumption
    }
}

/// Get current consumption
#[derive(Message)]
#[rtype(result = "bool")]
pub struct CheckDeviceExists(pub DeviceId);

impl Handler<CheckDeviceExists> for EnergyActor {
    type Result = bool;

    fn handle(&mut self, msg: CheckDeviceExists, _ctx: &mut Context<Self>) -> Self::Result {
        self.devices.exists(&msg.0)
    }
}

/// Enroll device
#[derive(Message)]
#[rtype(result = "anyhow::Result<()>")]
pub struct EnrollDevice(pub DeviceId, pub DeviceInfo, pub X509Req);

impl Handler<EnrollDevice> for EnergyActor {
    type Result = anyhow::Result<()>;

    fn handle(&mut self, msg: EnrollDevice, _ctx: &mut Context<Self>) -> Self::Result {
        self.devices.enroll(&msg.0, &msg.1, &msg.2)
    }
}

/// Delete a device
#[derive(Message)]
#[rtype(result = "anyhow::Result<()>")]
pub struct DeleteDevice(pub DeviceId);

impl Handler<DeleteDevice> for EnergyActor {
    type Result = anyhow::Result<()>;

    fn handle(&mut self, msg: DeleteDevice, _ctx: &mut Context<Self>) -> Self::Result {
        log::info!("Requested to delete device {:?}...", &msg.0);
        self.devices.delete(&msg.0)?;
        // TODO : delete energy related information
        Ok(())
    }
}

/// Get the list of devices
#[derive(Message)]
#[rtype(result = "Vec<Device>")]
pub struct GetDeviceLists;

impl Handler<GetDeviceLists> for EnergyActor {
    type Result = Vec<Device>;

    fn handle(&mut self, _msg: GetDeviceLists, _ctx: &mut Context<Self>) -> Self::Result {
        self.devices.full_list()
    }
}