use axum::{extract::{State},Json};
use super::{Ident,check_token};
use crate::{AppState, LogLevel::*, datasource::Datasource, log};

#[derive(serde::Serialize)]
pub struct MqttBack{
    pub errcode: i16,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub errmsg: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub clientid: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mqttu: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mqttp: Option<String>

}

// pub async fn get_mqtt(
//     State(state): State<AppState>,
//     Json(u): axum::extract::Json<Ident>
// ) -> Json<MqttBack> {
//     let (uid,_) = match check_token(&state, u.token).await {
//         Ok(id) => {id},
//         Err(_) => {
//             return Json(MqttBack{errcode: 2000, errmsg: Some("鉴权失败: token无效".to_string()),mqttp:None,clientid:None,mqttu:None})
//         }
//     };
//     let mut mqid:String;
//     match state.db_lite.query("select mqid from user where id=?", [uid], |r|{r.get::<usize,String>(0)}).await{
//         Ok(clientid)=>{
//             mqid=clientid;
//             // if clientid.is_empty(){
//             //     mqid = format!("webu{}",super::token(5));
//             // }else{
//             //     if let Err(e)=tokio::fs::remove_file(format!("/var/lib/mosquitto/{}",clientid)).await{
//             //         log(Warning, format!("fail to remove old mqtt user file {e}"))
//             //     };
//             //     mqid=clientid;
//             // }
//         }
//         Err(e) => {
//             if !e.is_empty(){
//                 log(Error, format!("query mqid failed: {e}"));
//                 return Json(MqttBack{errcode: 3000, errmsg: Some("数据库异常: 获取用户信息失败".to_string()),mqttp:None,clientid:None,mqttu:None});
//             }
//             mqid="".to_string();
//         }
//     }
//     if mqid.is_empty(){ 
        
//     let mut mq: String;
//     let mut try_time=0;
//         loop{// 确保获取不重复的clientid，mqid设定为unique
//             if try_time>5{
//                 return Json(MqttBack{errcode: 3000, errmsg: Some("数据库异常: 无法为用户绑定新clientid, 因为当前已经存在太多用户".to_string()),mqttp:None,clientid:None,mqttu:None});
//             }
//             match state.db_lite.execute("update user set mqid=? where id=?", ({mq=format!("webu{}",super::token(5));mq.clone()},uid)).await{
//                 Ok(_) => {mqid=mq;break;},
//                 Err(e) => {
//                     if e.is_empty(){
//                         try_time+=1;
//                         continue;
//                     }
//                     log(Error, format!("update mqid failed: {e}"));
//                     return Json(MqttBack{errcode: 3000, errmsg: Some("数据库异常: 未能绑定mqtt-clientid到用户".to_string()),mqttp:None,clientid:None,mqttu:None})
//                 }
//             };
//         }
//     }
//     let (mqtp, mqtu): (String,String);
//     match tokio::fs::File::create(format!("/var/lib/mosquitto/user/{mqid}")).await{
//         Ok(mut f) => {
//             (mqtu,mqtp) = (super::token(12),super::token(12));
//             if let Err(e)=f.write(
//                 format!("{}\n{}\n1\n{}",mqtu.clone(),mqtp.clone(),
//                     if let Ok(t)=(std::time::SystemTime::now()+std::time::Duration::from_mins(10)).duration_since(std::time::UNIX_EPOCH){
//                         t.as_secs()
//                     }else{0}
//                 ).as_bytes()
//             ).await{
//                 log(Warning, format!("mqtt user file write failed {e}"));
//             };
//         },
//         Err(e) => {
//             log(Warning, format!("mqtt user file create failed {e}"));
//             return  Json(MqttBack{errcode: 3000, errmsg: Some("数据库异常: 创建用户文件失败".to_string()),mqttp:None,clientid:None,mqttu:None});
//         }
//     };
//     match state.db_lite.query_rows("select d.sn from device d left join map_user_device m on d.id=m.did where m.uid=?", [uid], |r|{r.get::<usize,String>(0)}).await{
//         Ok(r)=>{
//             // log(Debug, format!("get mqtt sub list{:?}",r));
//             let mut fsub = if let Ok(f)=tokio::fs::File::create(format!("/var/lib/mosquitto/sub/{}",mqid)).await{f}else{
//                 log(Warning, format!("fail at mqtt sub create"));
//                 return Json(MqttBack{errcode: 3000, errmsg: Some("mqtt鉴权失败: 创建用户文件失败".to_string()),mqttp:None,clientid:None,mqttu:None});
//             };
//             let mut fpub = if let Ok(f)=tokio::fs::File::create(format!("/var/lib/mosquitto/pub/{}",mqid)).await{f}else{
//                 log(Warning, format!("fail at mqtt pub create"));
//                 return Json(MqttBack{errcode: 3000, errmsg: Some("mqtt鉴权失败: 创建用户文件失败".to_string()),mqttp:None,clientid:None,mqttu:None});
//             };
//             if !r.is_empty(){
//                 if let Err(e)=fpub.write(format!("/wf/Iot/device/{}\n{}", r.join("\n/wf/Iot/device/"),r.join("\n")).as_bytes()).await{
//                 // if let Err(e)=fpub.write(format!("/wf/Iot/device/{}\n{}/+/cmd", r.join("\n/wf/Iot/device/"),r.join("/+/cmd\n")).as_bytes()).await{
//                     log(Warning, format!("fail to write pub list to file {e}"));
//                 };
//                 if let Err(e)=fsub.write(format!("/wf/Iot/client/{}\n{}", r.join("\n/wf/Iot/client/"),r.join("\n")).as_bytes()).await{
//                 // if let Err(e)=fsub.write(format!("/wf/Iot/client/{}\n{}/+/state", r.join("\n/wf/Iot/client/"),r.join("/+/state\n")).as_bytes()).await{
//                     log(Warning, format!("fail to write sub list to file {e}"));
//                 };
//             } else {
//                 if let Err(e)=fpub.write(String::new().as_bytes()).await{
//                     log(Warning, format!("fail to write pub list to file {e}"));
//                 };
//                 if let Err(e)=fsub.write(String::new().as_bytes()).await{
//                     log(Warning, format!("fail to write sub list to file {e}"));
//                 };
//             }
//         }
//         Err(e) => {
//             if !e.is_empty(){
//                 return Json(MqttBack{errcode: 3000, errmsg: Some("mqtt鉴权失败: 获取用户下属清单失败".to_string()),mqttp:None,clientid:None,mqttu:None});
//             }
//         }
//     }
//     return Json(MqttBack{errcode: 0, errmsg: None,mqttp:Some(mqtp),clientid:Some(mqid),mqttu:Some(mqtu)})
// }


pub async fn get_mqtt(
    State(state): State<AppState>,
    Json(u): axum::extract::Json<Ident>
) -> Json<MqttBack> {
    let (uid,_) = match check_token(&state, u.token).await {
        Ok(id) => {id},
        Err(_) => {
            return Json(MqttBack{errcode: 2000, errmsg: Some("鉴权失败: token无效".to_string()),mqttp:None,clientid:None,mqttu:None})
        }
    };
    let (mqtp, mqtu): (String,String) = (super::token(12),super::token(12));
    let mqid = if let Ok(s) = state.db_lite.query("select mqid from user where id=?", [uid], |r|{r.get::<usize,String>(0)}).await{
        s
    }else{
        return Json(MqttBack{errcode: 3000, errmsg: Some("数据库异常: 获取用户mqtt-clientid失败".to_string()),mqttp:None,clientid:None,mqttu:None});
    };
    if let Some(d) = state.mq_detail{
        match d.db_mq_user.execute("INSERT INTO user(clientid,user,pass,mode,deadline)VALUES(?,?,?,1,unixepoch()+300)ON CONFLICT(clientid)DO UPDATE SET user=excluded.user,pass=excluded.pass,mode=excluded.mode,deadline=excluded.deadline", (mqid.clone(),mqtu.clone(),mqtp.clone())).await{
            Ok(_) => {}
            Err(e)=>{log(Warning, format!("fail to update mqttuser: {e}"));}
        }
    }

    return Json(MqttBack{errcode: 0, errmsg: None,mqttp:Some(mqtp),clientid:Some(mqid),mqttu:Some(mqtu)});
}

#[test]
fn test_f(){
use tokio::io::{AsyncReadExt};
    tokio::runtime::Runtime::new().unwrap().block_on(async{
use tokio::io::{AsyncWriteExt};
        match tokio::fs::File::create("testf").await{
            Ok(mut f) =>{
            let buf: &mut [u8];
            let mut b = [0;1024];
            buf=b.as_mut_slice();
            if let Ok(n)=f.read(buf).await{println!("file read {}",n)};
            if let Ok(n)=f.write(format!("asdf").as_bytes()).await{println!("file write {}",n);
                if let Err(e)=f.flush().await{ println!("file flush failed: {}",e)};};
            }
        Err(e) => {
            // match tokio::fs::File::create("testf").await{
            //     Ok(mut f) => {
            //         println!("file create");
            //         if let Err(e)=f.write(format!("creatt").as_bytes()).await{
            //             println!("file write failed: {}",e);
            //         };
            //     }
            //     Err(e) => {println!("file create failed: {}",e)}
            // }
            println!("file create failed: {}",e);
        }
    }
    })
}