use lox::proto::open_invite;
use lox::{IssuerPubKey, OPENINV_LENGTH};
use serde::{Deserialize, Serialize};
use serde_json;
//use serde_wasm_bindgen;
use std::array::TryFromSliceError;
use std::panic;
use wasm_bindgen::prelude::*;

#[derive(Deserialize, Serialize)]
struct ReqState {
    request: lox::proto::open_invite::Request,
    state: lox::proto::open_invite::State,
}

#[derive(Debug, Deserialize, Serialize)]
struct PubKeys {
    lox_pub: IssuerPubKey,
    migration_pub: IssuerPubKey,
    migrationkey_pub: IssuerPubKey,
    reachability_pub: IssuerPubKey,
    invitation_pub: IssuerPubKey,
}

#[derive(Debug, Deserialize, Serialize)]
struct Credential {
    lox_credential: String,
    bridgeline: String,
}

#[wasm_bindgen]
extern "C" {
    #[wasm_bindgen(js_namespace = console)]
    pub fn log(s: &str);
}

#[wasm_bindgen]
pub fn set_panic_hook() {
    panic::set_hook(Box::new(console_error_panic_hook::hook));
}

#[wasm_bindgen]
pub fn open_invite(invite: &[u8]) -> Result<String, JsValue> {
    unsafe {
        log(&format!("Using invite: {:?}", invite));
    }
    let token = match validate(invite) {
        Ok(token) => token,
        Err(e) => return Err(JsValue::from(e.to_string())),
    };
    let (request, state) = open_invite::request(&token);
    let req_state = ReqState {
        request: request,
        state: state,
    };
    unsafe {
        log(&format!(
            "Formatted open invite request: {}",
            serde_json::to_string(&req_state).unwrap()
        ));
    }
    Ok(serde_json::to_string(&req_state).unwrap())
}

#[wasm_bindgen]
pub fn handle_new_lox_credential(
    open_lox_result: String,
    open_lox_response: String,
    lox_pub: String,
) -> Result<String, JsValue> {
    let req_state: ReqState = serde_json::from_str(&open_lox_result).unwrap();
    let deserialized_state = req_state.state;
    let deserialized_response = serde_json::from_str(&open_lox_response).unwrap();
    let pubkeys: PubKeys = serde_json::from_str(&lox_pub).unwrap();
    let lox_cred = match open_invite::handle_response(
        deserialized_state,
        deserialized_response,
        &pubkeys.lox_pub,
    ) {
        Ok(lox_cred) => lox_cred,
        Err(e) => {
            log(&format!("Error: {:?}", e.to_string()));
            return Err(JsValue::from(e.to_string()));
        }
    };
    let lox_cred = Credential {
        lox_credential: serde_json::to_string(&lox_cred.0).unwrap(),
        bridgeline: serde_json::to_string(&lox_cred.1).unwrap(),
    };
    unsafe {
        log(&format!(
            "Got new Lox Credential: {}",
            lox_cred.lox_credential
        ));
        log(&format!("Got new bridgeline: {}", lox_cred.bridgeline));
    }
    Ok(serde_json::to_string(&lox_cred).unwrap())
}

// This should also check the pubkey
fn validate(invite: &[u8]) -> Result<[u8; OPENINV_LENGTH], TryFromSliceError> {
    invite.try_into()
}