use crate::cmd::config::app_config;
use crate::connect_or_retry;
use crate::ems::{Consumer, Producer, Service};
use crate::internal::modbus::code::ModbusCode;
use crate::internal::modbus::{read_csv_to_code, slice_sequential};
use crate::internal::utils;
use anyhow::bail;
use log::{error, info};
use std::net::SocketAddr;
use std::sync::Arc;
use tokio::sync::Mutex;
use tokio_modbus::client::Reader;
use tokio_modbus::FunctionCode;

pub struct Pcs {
    pub id: String,
    pub producer: Producer,
    pub consumer: Arc<Mutex<Consumer>>,
    pub modbus_code: Arc<Mutex<Vec<ModbusCode>>>,
    pub ctx: Arc<Mutex<tokio_modbus::client::Context>>,
}

async fn connect_modbus_tcp() -> anyhow::Result<tokio_modbus::client::Context> {
    let config = &app_config().emu.pcs;
    let addr: SocketAddr = format!("{}:{}", config.host, config.port).parse()?;
    connect_or_retry!(tokio_modbus::client::tcp::connect(addr), "ModbusTCP")
}

impl Pcs {
    /// 初始化PCS
    pub async fn new(producer: Producer, consumer: Consumer) -> anyhow::Result<Self> {
        let id = utils::generate_random_str(12);
        utils::log::init_log("inpower_iot_mgc_rs::ems::pcs::*", "pcs/pcs.log").await;
        let ctx = connect_modbus_tcp().await?;
        let modbus_code = match read_csv_to_code("./config/pcs.csv") {
            Ok(c) => c,
            Err(e) => {
                error!("【PCS】协议生成失败: {}", e.to_string());
                return Err(e);
            }
        };
        info!("PCS [{}] 初始化成功", id);
        Ok(Pcs {
            id,
            producer,
            consumer: Arc::new(Mutex::new(consumer)),
            modbus_code: Arc::new(Mutex::new(modbus_code)),
            ctx: Arc::new(Mutex::new(ctx)),
        })
    }

    async fn read_input_register(&self) -> anyhow::Result<()> {
        let modbus_code_clone = self.modbus_code.clone();
        let mut modbus_guard = modbus_code_clone.lock().await;
        // 从整个配置中过滤出输入寄存器集合
        let mut input_registers: Vec<_> = modbus_guard
            .iter_mut()
            .filter(|it| {
                it.addr.is_some()
                    && it.name.is_some()
                    && it.code == Some(FunctionCode::ReadInputRegisters.value())
            })
            .collect();
        //连续子序列分组
        let seq_slice = slice_sequential(input_registers.as_mut_slice());
        //遍历分组
        for codes in seq_slice.into_iter() {
            if let Some(start_code) = codes.first() {
                if let Some(start_addr) = start_code.addr {
                    let words = self
                        .ctx
                        .lock()
                        .await
                        //读取输入寄存器
                        .read_input_registers(start_addr, codes.len() as u16)
                        .await??;
                    if words.len() == codes.len() {
                        for (i, word) in words.chunks(2).enumerate() {
                            //大端序
                            codes[i].data = Some([word[0] as u8, word[1] as u8]);
                        }
                    } else {
                        bail!(
                            "返回的数据长度不正确, register长度:{}, data长度:{}",
                            input_registers.len(),
                            words.len()
                        )
                    }
                }
            }
        }
        Ok(())
    }

    // async fn read_holding_registers() -> anyhow::Result<()> {
    //     todo!("")
    // }
}

#[async_trait::async_trait]
impl Service for Pcs {
    async fn read_task(&self) {
        let _producer = self.producer.clone();
        loop {
            tokio::time::sleep(tokio::time::Duration::from_millis(
                app_config().emu.pcs.interval,
            ))
            .await;
            match self.read_input_register().await {
                Ok(_) => {}
                Err(e) => {
                    error!("{}", e.to_string());
                    //断线重连
                    let context = connect_modbus_tcp().await.unwrap();
                    *self.ctx.lock().await = context;
                }
            }
        }
    }

    async fn write_task(&self) {
        let consumer = self.consumer.clone();
        let _ctx = self.ctx.clone();
        loop {
            let string = consumer.lock().await.recv().await.unwrap();
            info!("[PCS] {}", string);
        }
    }
}