use std::time::SystemTime;

use log::{error, info};

use tokio::select;
use tokio::sync::{watch, mpsc::{Receiver, Sender}};

use std::sync::atomic::{AtomicU32, Ordering};
use atomic_float::AtomicF32;

use std::sync::{Arc, Mutex};

use bioz_icd_rs::{SweepPoints, MultiplexerCapability};

use crate::state::{HardwareState, MeasurementDataState};

use crate::icd;
use crate::client::WorkbookClient;

use crate::logging::LoggingStates;
use crate::plot::{TimeSeriesPlot, BodePlot};

use crate::signals::{LoggingSignal, StartStopSignal};

use crate::state::HardwareConnected;

pub async fn communicate_with_hardware(
    mut run_impedancemeter_rx: Receiver<StartStopSignal>,
    run_impedancemeter_tx: Sender<StartStopSignal>,
    measurement_data: Arc<MeasurementDataState>,
    hardware_state_tx: watch::Sender<HardwareState>,
    gui_logging_state: Arc<Mutex<LoggingStates>>,
    log_tx: Sender<LoggingSignal>,
) {
    let data_counter = Arc::new(AtomicU32::new(0));
    let data_counter_clone = data_counter.clone();
    let sampling_rate_clone = measurement_data.sampling_rate.clone();

    tokio::spawn(async move {
        loop {
            tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
            sampling_rate_clone.store(data_counter.load(Ordering::Relaxed) as f32, Ordering::Relaxed);
            data_counter.store(0, Ordering::Relaxed);
        }
    });

    #[derive(Default, Clone, Copy)]
    struct Settings {
        mode: Option<StartStopSignal>,
    }
    let settings = Arc::new(Mutex::new(Settings::default()));
    
    loop {
        let mut hardware_state = HardwareState::default();

        let workbook_client = match WorkbookClient::new() {
            Ok(client) => {
                info!("Connected to hardware successfully.");
                if let Some(mode) = settings.lock().unwrap().mode {
                    run_impedancemeter_tx.send(mode).await.unwrap();
                }
                match client.get_device_info().await.unwrap() {
                    MultiplexerCapability::Absent => {
                        hardware_state.connected = HardwareConnected::WithoutMultiplexer;
                        hardware_state_tx.send(hardware_state.clone()).unwrap();
                        info!("Connected device: Without Multiplexer");
                    },
                    MultiplexerCapability::Present => {
                        hardware_state.connected = HardwareConnected::WithMultiplexer;
                        hardware_state_tx.send(hardware_state.clone()).unwrap();
                        info!("Connected device: With Multiplexer");
                    },
                }
                client
            },
            Err(e) => {
                error!("Failed to connect to hardware: {:?}", e);
                tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
                continue;
            }
        };

        // Subscribe to SingleImpedanceOutputTopic
        let mut single_impedance_sub = workbook_client
            .client
            .subscribe_multi::<icd::SingleImpedanceOutputTopic>(8)
            .await
            .unwrap();

        let data = (measurement_data.magnitude_series.clone(), measurement_data.phase_series.clone(), measurement_data.magnitude.clone(), measurement_data.phase.clone());
        let data_counter_clone_single = data_counter_clone.clone();

        // Clone log_tx for the task
        let gui_logging_state_clone = gui_logging_state.clone();
        let log_tx_clone = log_tx.clone();

        let settings_clone = settings.clone();

        tokio::spawn(async move {
            while let Ok(val) = single_impedance_sub.recv().await {
                {
                    let mut mag_plot = data.0.lock().unwrap();
                    let mut phase_plot = data.1.lock().unwrap(); 
                    let mut mag_val = data.2.lock().unwrap();
                    let mut phase_val = data.3.lock().unwrap();

                    *mag_val = val.magnitude;   
                    *phase_val = val.phase;
        
                    mag_plot.add(val.magnitude as f64);
                    phase_plot.add(val.phase as f64);
                    
                    data_counter_clone_single.fetch_add(1, Ordering::Relaxed);
                }
                // Send logging signal
                if *gui_logging_state_clone.lock().unwrap() == LoggingStates::Logging {
                    let settings = *settings_clone.lock().unwrap();
                    match settings.mode {
                        Some(StartStopSignal::StartSingle(freq, _, _, _)) => {
                            if let Err(e) = log_tx_clone.try_send(LoggingSignal::SingleImpedance(SystemTime::now(), freq, val.magnitude, val.phase)) {
                                error!("Failed to send logging signal: {:?}", e);
                            }
                        },
                        _ => {
                            error!("Frequency not set for single impedance logging.");
                        },
                    }
                    // if let Err(e) = log_tx_clone.send(LoggingSignal::SingleImpedance(SystemTime::now(), settings.frequency, val.magnitude, val.phase)).await {
                        // error!("Failed to send logging signal: {:?}", e);
                    // }
                }
            }
            info!("SingleImpedanceOutputTopic subscription ended.");
        });

        // Subscribe to SweepImpedanceOutputTopic8
        let mut sweep_impedance_sub = workbook_client
            .client
            .subscribe_multi::<icd::SweepImpedanceOutputTopic>(8)
            .await
            .unwrap();

        let data = measurement_data.bode_plot.clone();
        let data_counter_clone_sweep = data_counter_clone.clone();

        // Clone log_tx for the task
        let gui_logging_state_clone = gui_logging_state.clone();
        let log_tx_clone = log_tx.clone();

        tokio::spawn(async move {
            while let Ok(val) = sweep_impedance_sub.recv().await {
                
                match val.points {

                    SweepPoints::Eight => {
                        let magnitudes: Vec<f32> = val.magnitudes_8.into_iter().collect();
                        let phases: Vec<f32> = val.phases_8.into_iter().collect();
                        {
                            let mut bode_plot = data.lock().unwrap();
                            bode_plot.update_magnitudes(SweepPoints::Eight, magnitudes.clone());
                            bode_plot.update_phases(SweepPoints::Eight, phases.clone());
                        }
                        if *gui_logging_state_clone.lock().unwrap() == LoggingStates::Logging {
                            if let Err(e) = log_tx_clone.send(LoggingSignal::SweepImpedance(SystemTime::now(), SweepPoints::Eight.values().to_vec(), magnitudes.clone(), phases.clone())).await {
                                error!("Failed to send logging signal: {:?}", e);
                            }
                        }
                    },
                    SweepPoints::Eighteen => {
                        let magnitudes: Vec<f32> = val.magnitudes_18.into_iter().collect();
                        let phases: Vec<f32> = val.phases_18.into_iter().collect();
                        {
                            let mut bode_plot = data.lock().unwrap();
                            bode_plot.update_magnitudes(SweepPoints::Eighteen, magnitudes.clone());
                            bode_plot.update_phases(SweepPoints::Eighteen, phases.clone());
                        }
                        if *gui_logging_state_clone.lock().unwrap() == LoggingStates::Logging {
                            if let Err(e) = log_tx_clone.send(LoggingSignal::SweepImpedance(SystemTime::now(), SweepPoints::Eighteen.values().to_vec(), magnitudes.clone(), phases.clone())).await {
                                error!("Failed to send logging signal: {:?}", e);
                            }
                        }
                    },
                }
                
                data_counter_clone_sweep.fetch_add(1, Ordering::Relaxed);   
            }
        });
        
        let log_tx_clone = log_tx.clone();
        loop {
            select! {
                Some(frequency) = run_impedancemeter_rx.recv() => {
                    match frequency {                
                        StartStopSignal::StartSingle(freq, lead_mode, electrode_config, dft_num) => {
                            match workbook_client.start_impedancemeter_single(freq, lead_mode, electrode_config, dft_num).await {
                                Ok(Ok(periods)) => {
                                    info!("Impedance meter started at frequency: {} with periods per DFT: {}", freq, periods);
                                    settings.lock().unwrap().mode = Some(StartStopSignal::StartSingle(freq, lead_mode, electrode_config, dft_num));
                                    hardware_state.periods_per_dft = Some(periods);
                                    hardware_state_tx.send(hardware_state.clone()).unwrap();

                                    // When logging add electrode configuration to logging file
                                    if *gui_logging_state.lock().unwrap() == LoggingStates::Logging {
                                        if let Err(e) = log_tx_clone.send(LoggingSignal::ElectrodeCongiguration(electrode_config)).await {
                                            error!("Failed to send logging signal: {:?}", e);
                                        }
                                    }
                                },
                                Ok(Err(e)) => {
                                    error!("Failed to init on hardware: {:?}", e);
                                    hardware_state.periods_per_dft = None;
                                    hardware_state_tx.send(hardware_state.clone()).unwrap();
                                },
                                Err(e) => {
                                    error!("Communication error when starting impedancemeter: {:?}", e);
                                    hardware_state.periods_per_dft = None;
                                    hardware_state_tx.send(hardware_state.clone()).unwrap();
                                }
                            }
                        },
                        StartStopSignal::StartSweep(lead_mode, electrode_config, num_points) => {
                            match workbook_client.start_impedancemeter_sweep(lead_mode, electrode_config, num_points).await {
                                Ok(Ok(periods)) => {
                                    settings.lock().unwrap().mode = Some(StartStopSignal::StartSweep(lead_mode, electrode_config, num_points));
                                    info!("Sweep Impedancemeter started.");
                                    match num_points {
                                        SweepPoints::Eight => {
                                            hardware_state.periods_per_dft_sweep = (num_points.values().iter().copied().collect(), Some(periods.periods_per_dft_8.into_iter().collect()));
                                            hardware_state_tx.send(hardware_state.clone()).unwrap();

                                        },
                                        SweepPoints::Eighteen => {
                                            hardware_state.periods_per_dft_sweep = (num_points.values().iter().copied().collect(), Some(periods.periods_per_dft_18.into_iter().collect()));
                                            hardware_state_tx.send(hardware_state.clone()).unwrap();
                                        },
                                    }

                                    // When logging add electrode configuration to logging file
                                    if *gui_logging_state.lock().unwrap() == LoggingStates::Logging {
                                        if let Err(e) = log_tx_clone.send(LoggingSignal::ElectrodeCongiguration(electrode_config)).await {
                                            error!("Failed to send logging signal: {:?}", e);
                                        }
                                    }
                                },
                                Ok(Err(e)) => {
                                    error!("Failed to sweep-init on hardware: {:?}", e);
                                    hardware_state.periods_per_dft_sweep = (num_points.values().iter().copied().collect(), None);
                                    hardware_state_tx.send(hardware_state.clone()).unwrap();
                                },
                                Err(e) => {
                                    error!("Communication error when starting impedancemeter: {:?}", e);
                                    hardware_state.periods_per_dft_sweep = (num_points.values().iter().copied().collect(), None);
                                    hardware_state_tx.send(hardware_state.clone()).unwrap();
                                }
                            }
                        },
                        StartStopSignal::Stop => {
                            if let Err(e) = workbook_client.stop_impedancemeter().await {
                                error!("Failed to stop impedancemeter: {:?}", e);
                            } else {
                                settings.lock().unwrap().mode = Some(StartStopSignal::Stop);
                                hardware_state.periods_per_dft = None;
                                let (freq, _) = hardware_state.periods_per_dft_sweep.clone();
                                hardware_state.periods_per_dft_sweep = (freq, None);
                                hardware_state_tx.send(hardware_state.clone()).unwrap();
                                info!("Impedancemeter stopped.");
                            }
                        },
                    }
                }
                _ = workbook_client.wait_closed() => {
                    // Handle client closure
                    info!("Client connection closed.");
                    break;
                }

                else => {
                    // All channels closed
                    break;
                }

            }
        }
        info!("Communication with hardware ended.");
        hardware_state.connected = HardwareConnected::None;
        hardware_state_tx.send(hardware_state).unwrap();
        tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
    }
}