use cw_client::{CliClient, CwClient};
use der::DecodePem;
use mc_attestation_verifier::SignedTcbInfo;
use p256::ecdsa::VerifyingKey;
use quartz_tcbinfo_msgs::ExecuteMsg;
use quoted_string::strip_dquotes;
use reqwest::Url;
use serde_json::{json, Value};
use std::collections::HashMap;
use std::{fs, path::Path};
use x509_cert::Certificate;
type TcbInfo = String;
type Fmspc = String;
type Update = String;

const TCB_SIGNER: &str = include_str!("../tcb_signer.pem");

async fn get_tcbinfo(fmspc: Fmspc, update: Update) -> String {
    let url = format!("https://api.trustedservices.intel.com/sgx/certification/v4/tcb?fmspc={fmspc}&update={update}");
    let body: String = reqwest::get(url)
        .await
        .expect("url retrieval failed")
        .text()
        .await
        .expect("could not read https response");
    body
}

async fn get_fmspc_list() -> Vec<Fmspc> {
    let body: String =
        reqwest::get("https://api.trustedservices.intel.com/sgx/certification/v4/fmspcs")
            .await
            .expect("url retrieval failed")
            .text()
            .await
            .expect("could not read https response");
    let fmspc_data: Vec<Value> = serde_json::from_str(&body).expect("could not convert to JSON");
    let mut fmspc_list: Vec<Fmspc> = Vec::new();
    for item in fmspc_data.iter() {
        let fmspc: String = format!("{}", item["fmspc"]);
        fmspc_list.push(strip_dquotes(&fmspc).unwrap().to_string());
    }
    println!("{:?}", fmspc_list);
    fmspc_list
}

async fn upsert_tcbinfo() -> Result<(), &'static str> {
    
    let mut store: HashMap<Fmspc, TcbInfo> = if Path::new("./standard").exists() {
        let data = fs::read_to_string("./standard").expect("Unable to read file");
          serde_json::from_str(&data).unwrap()
    }
    else {
        fs::File::create("./standard").expect("couldn't create file");
       HashMap::new()
    };
   
    let certificate = TCB_SIGNER.to_string();
    let parsed_certificate =
        Certificate::from_pem(certificate.clone()).expect("failed to parse PEM");
    let fmspc_list = get_fmspc_list().await;
    let key = VerifyingKey::from_sec1_bytes(
        parsed_certificate
            .tbs_certificate
            .subject_public_key_info
            .subject_public_key
            .as_bytes()
            .expect("Failed to parse public key"),
    )
    .expect("Failed to decode public key");

    for fmspc in fmspc_list {
        let tcbinfo = get_tcbinfo(fmspc.clone(), "standard".to_string()).await;
        assert!(verify_signature(tcbinfo.clone(), key));
        let store_entry = if store.contains_key(&fmspc)
        {
            &store[&fmspc]
        }
        else {""};
        if *store_entry != tcbinfo {
            println!("updating local TCBInfo for FMSPC: {fmspc}");
            store.insert(fmspc.clone(), tcbinfo.clone());
            println!("updating on-chain TCBInfo for FMSPC: {fmspc}");
            let testnet = Url::parse("https://rpc-falcron.pion-1.ntrn.tech")
                .expect("couldn't parse network URL");
            let contract_address =
                "neutron1r4m59786vmxrx866585ze5ugjx9egcyja0nuxhn2y6d7ht6680sspa89zk"
                    .parse()
                    .expect("failed to parse contract address");
            let chain_id = tendermint::chain::id::Id::try_from("pion-1").expect("invalid chain id");
            let sender = "ajinkya";
            let client = CliClient::neutrond(testnet);
            let execute_msg = ExecuteMsg {
                tcb_info: tcbinfo.to_string(),
                certificate: certificate.clone(),
                time: None,
            };
            let res = client
                .tx_execute(
                    &contract_address,
                    &chain_id,
                    400000,
                    &sender,
                    json!(execute_msg),
                    "11000untrn",
                )
                .await;
            println!("done: {res:?}");
            std::thread::sleep(std::time::Duration::from_secs(5));
        } else {
            println!("TCBInfo for FMSPC: {fmspc} up to date")
        }
    }
    let serialized = serde_json::to_string(&store).unwrap();
    fs::write("./standard", serialized).expect("Unable to write file");

    Ok(())
    //  }
    //   }
}

fn verify_signature(tcbinfo: String, key: VerifyingKey) -> bool {
    let signed_tcbinfo =
        SignedTcbInfo::try_from(tcbinfo.as_ref()).expect("tcbinfo string parsing failed");
    signed_tcbinfo
        .verify(Some(&key), None)
        .expect("could not verify signature");
    true
}

#[tokio::main]
pub async fn main() {
    upsert_tcbinfo().await.expect("TCBInfo update failed");
}