use std::sync::Arc;

use anyhow::{Error, Result};
use tibber::{Consumption, HomeId, House, PriceInfo, TibberSession, TimeResolution, User};

pub struct TibberHandler {
    session: Arc<TibberSession>,
    pub user: User,
    pub homes: Vec<(HomeId, House)>,
}

impl TibberHandler {
    pub async fn new(token: impl ToString + Send + 'static) -> Result<Self> {
        tokio::task::spawn_blocking(move || {
            let session = Arc::new(TibberSession::new(token.to_string()));

            let user = session.get_user().map_err(|err| {
                Error::msg(format!(
                    "TibberHandler: failed getting user information: {err:?}"
                ))
            })?;

            let mut homes = Vec::new();

            for home_id in user.homes.clone().into_iter() {
                let house = session.get_home(&home_id).map_err(|err| {
                    Error::msg(format!(
                        "TibberHandler: failed getting house information: {err:?}"
                    ))
                })?;

                homes.push((home_id, house));
            }

            Ok(Self {
                homes,
                user,
                session,
            })
        })
        .await?
    }

    async fn get_data<F, T>(&self, f: F) -> Result<Vec<(House, T)>>
    where
        F: Fn(&TibberSession, &HomeId) -> Result<T> + Send + Sync + Copy + 'static,
        T: Send + Sync + 'static,
    {
        let mut v = Vec::new();

        for (home_id, house) in self.homes.iter() {
            v.push((
                house.clone(),
                tokio::task::spawn_blocking({
                    let session = self.session.clone();
                    let home_id = home_id.clone();

                    move || f(&session, &home_id)
                })
                .await??,
            ));
        }

        Ok(v)
    }

    pub async fn current_prices(&self) -> Result<Vec<(House, PriceInfo)>> {
        self.get_data(|session, home_id| {
            session.get_current_price(home_id).map_err(|err| {
                Error::msg(format!(
                    "TibberHandler: failed getting current price: {err:?}"
                ))
            })
        })
        .await
    }

    pub async fn prices_today(&self) -> Result<Vec<(House, Vec<PriceInfo>)>> {
        self.get_data(|session, home_id| {
            session.get_prices_today(home_id).map_err(|err| {
                Error::msg(format!(
                    "TibberHandler: failed getting prices of today: {err:?}"
                ))
            })
        })
        .await
    }

    pub async fn prices_tomorrow(&self) -> Result<Vec<(House, Vec<PriceInfo>)>> {
        self.get_data(|session, home_id| {
            session.get_prices_tomorrow(home_id).map_err(|err| {
                Error::msg(format!(
                    "TibberHandler: failed getting prices for tomorrow: {err:?}"
                ))
            })
        })
        .await
    }

    pub async fn consumption(
        &self,
        resolution: TimeResolution,
        last: u32,
    ) -> Result<Vec<(House, Vec<Consumption>)>> {
        let mut v = Vec::new();

        for (home_id, house) in self.homes.iter() {
            v.push((
                house.clone(),
                tokio::task::spawn_blocking({
                    let session = self.session.clone();
                    let home_id = home_id.clone();
                    let resolution = resolution.clone();

                    move || {
                        session
                            .get_consuption(&home_id, resolution, last)
                            .map_err(|err| {
                                Error::msg(format!(
                                    "TibberHandler: failed getting consumption: {err:?}"
                                ))
                            })
                    }
                })
                .await??,
            ));
        }

        Ok(v)
    }
}

#[cfg(test)]
mod test {
    use super::TibberHandler;
    use anyhow::Result;

    use std::fs;

    #[tokio::test]
    async fn test_connection() -> Result<()> {
        let tibber = TibberHandler::new(fs::read_to_string("tibber_token.txt")?).await?;
        let current_prices = tibber.current_prices().await?;

        println!("{current_prices:?}");

        Ok(())
    }
}