#![allow(clippy::unwrap_used, clippy::expect_used)]
//! Taken from official [demo1](https://mosaik.readthedocs.io/en/3.3.3/tutorials/demo1.html)
//! collects all data it receives each step in a dictionary (including the current simulation time)
//! and simply prints everything at the end of the simulation.
use clap::Parser;
use log::error;
use mosaik_api::{
    run_simulation,
    tcp::ConnectionDirection,
    types::{
        Attr, CreateResult, InputData, Meta, ModelDescription, OutputData, OutputRequest, SimId,
        SimulatorType, Time,
    },
    MosaikApi,
};
use serde_json::{Map, Value};
use std::{
    collections::{BTreeMap, HashMap},
    net::{IpAddr, Ipv4Addr, SocketAddr},
    sync::LazyLock,
};

#[derive(Parser, Debug)]
struct Args {
    /// The local addres mosaik connects to, or none if we connect to them
    #[structopt(short, long)]
    addr: Option<String>,
}

pub fn main() {
    //get the address if there is one
    let args = Args::parse();
    env_logger::init();

    let address = match args.addr {
        //case if we connect us to mosaik
        Some(addr) => {
            ConnectionDirection::ConnectToAddress(addr.parse().expect("Address is not parseable."))
        }
        //case if mosaik connects to us
        None => {
            // Alternatively: "127.0.0.1:3456".parse().expect("Address is not parseable.")
            let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3456);
            ConnectionDirection::ListenOnAddress(addr)
        }
    };

    //initialize the simulator.
    let simulator = Collector::new();
    //start build_connection in the library.
    if let Err(e) = run_simulation(address, simulator) {
        error!("Error running Collector: {:?}", e);
    }
}

struct Collector {
    eid: Option<String>,
    data: BTreeMap<String, BTreeMap<String, BTreeMap<u64, i64>>>,
}

static META: LazyLock<Meta> = LazyLock::new(|| {
    Meta::new(
        SimulatorType::EventBased,
        HashMap::from([(
            "Monitor".to_string(),
            ModelDescription {
                public: true,
                params: &[],
                attrs: &[],
                trigger: None,
                any_inputs: Some(true),
                persistent: None,
            },
        )]),
        None,
    )
});

impl Collector {
    fn new() -> Self {
        Collector {
            eid: None,
            data: BTreeMap::new(),
        }
    }
}

impl MosaikApi for Collector {
    fn init(
        &mut self,
        _sid: SimId,
        _time_resolution: f64,
        _sim_params: Map<String, Value>,
    ) -> Result<&'static Meta, String> {
        Ok(&META)
    }

    fn create(
        &mut self,
        num: usize,
        model_name: String,
        _model_params: Map<Attr, Value>,
    ) -> Result<Vec<CreateResult>, String> {
        if num > 1 || self.eid.is_some() {
            return Err("Can only create one instance of Monitor.".into());
        }

        self.eid = Some("Monitor".to_string());
        Ok(vec![CreateResult::new(
            self.eid.clone().unwrap(),
            model_name,
        )])
    }

    fn setup_done(&self) -> Result<(), String> {
        Ok(())
    }

    fn step(
        &mut self,
        time: Time,
        inputs: InputData,
        _max_advance: Time,
    ) -> Result<Option<Time>, String> {
        if let Some(data) = inputs.get(self.eid.as_ref().unwrap()) {
            for (attr, values) in data {
                for (src, value) in values {
                    self.data
                        .entry(src.clone())
                        .or_default()
                        .entry(attr.clone())
                        .or_default()
                        .insert(time, value.as_f64().unwrap().round() as i64);
                }
            }
        }
        Ok(None)
    }

    fn stop(&self) {
        println!("Collected data:");

        let sims: Vec<_> = self.data.iter().collect();

        for (sim, sim_data) in sims {
            println!("- {sim}:");

            let attrs: Vec<_> = sim_data.iter().collect();

            for (attr, values) in attrs {
                println!("  - {attr}: {values:?}");
            }
        }
    }

    fn get_data(&self, _outputs: OutputRequest) -> Result<OutputData, String> {
        unimplemented!()
    }
}