// lib.rs
//
// 此部分代码主要负责Rust-C两侧的数据内存结构转换，提供了C侧的函数接口。注意命名规范：
// 在C侧使用时，凡是函数名带有 '_cwallet'的，调用过之后都必须用'free_cwallet'释放内存，
// 否则导致内存泄漏
//

use std::ffi::{CStr, CString};
use std::os::raw::c_char;
use std::str::FromStr;

mod wallet;
use secp256k1::PublicKey;
use wallet_impl::Wallet;

use crate::wallet::*;
mod utils;
use utils::crypto_utils::{zdecrypt, zencrypt};
use utils::str_utils::{base64_to_hex, hex_to_base64};

// #[cfg(target_os = "android")]
// mod android;
macro_rules! cchar_to_str {
    ($p1:expr) => {{
        let s = CStr::from_ptr($p1);
        let ps = s.to_str().unwrap();
        ps
    }};
}

macro_rules! cchar_to_string {
    ($p1:expr) => {{
        let s = CStr::from_ptr($p1);
        let ps = s.to_str().unwrap();
        ps.to_string()
    }};
}

macro_rules! str_to_cchar {
    ($p1:expr) => {{
        let msgkey = CString::new($p1).unwrap();
        let c_msgkey: *mut c_char = msgkey.into_raw();
        c_msgkey
    }};
}

#[no_mangle]
pub unsafe extern "C" fn get_address(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let address = rwallet.get_address();
    let address_str = format!("{:?}", address);
    let c_address = CString::new(address_str).unwrap();
    c_address.into_raw()
}

#[no_mangle]
pub unsafe extern "C" fn get_public_key(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let pk = rwallet.get_public_key();
    let c_pk = CString::new(pk.to_string()).unwrap();
    c_pk.into_raw()
}

#[no_mangle]
pub unsafe extern "C" fn generate_sec_key(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let s_key = rwallet.generate_sec_key();
    let cs_key = CString::new(s_key).unwrap();
    cs_key.into_raw()
}

#[no_mangle]
pub unsafe extern "C" fn sign(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
    msg: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let msg_str = cchar_to_str!(msg);
    let signature = rwallet.sign(msg_str);
    let r = match signature {
        Ok(v) => v,
        Err(err) => panic!("Problem sign: {:?}", err),
    };
    str_to_cchar!(r)
}

#[no_mangle]
pub unsafe extern "C" fn sign_for_tran(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
    msg: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let msg_str = cchar_to_str!(msg);
    println!("msg for sign tran: {}", &msg_str);
    let signature = rwallet.sign_for_tran(msg_str);
    let (r, recid) = match signature {
        Ok((v, _recid)) => (v, _recid),
        Err(err) => panic!("Problem sign: {:?}", err),
    };
    let result = format!("{}|{}", r, recid);
    str_to_cchar!(result)
}

#[no_mangle]
pub unsafe extern "C" fn rencrypt(pk: *const c_char, msg: *const c_char) -> *mut c_char {
    let msg_str = cchar_to_str!(msg);
    let pk_str = cchar_to_str!(pk);
    let public_key = match PublicKey::from_str(pk_str) {
        Ok(v) => v,
        Err(e) => panic!("error parse publickey: {}", e),
    };
    let msg_encrypt = match zencrypt(public_key, msg_str) {
        Ok(v) => v,
        Err(err) => panic!("error encrypt: {:?}", err),
    };
    str_to_cchar!(msg_encrypt)
}

#[no_mangle]
pub unsafe extern "C" fn wallet_encrypt(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
    msg: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let msg_str = cchar_to_str!(msg);
    let pk = rwallet.get_public_key();
    let msg_encrypt = match zencrypt(pk, msg_str) {
        Ok(v) => v,
        Err(err) => panic!("error encrypt: {:?}", err),
    };
    str_to_cchar!(msg_encrypt)
}

#[no_mangle]
pub unsafe extern "C" fn wallet_decrypt(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
    msg: *const c_char,
) -> *mut c_char {
    let rwallet = generate_rwallet(msg_key, master_key, second_key);
    let msg_str = cchar_to_str!(msg);
    let sk = rwallet.get_secret_key();
    let msg_decrypt = match zdecrypt(sk, msg_str) {
        Ok(v) => v,
        Err(err) => panic!("error decrypt: {:?}", err),
    };
    str_to_cchar!(msg_decrypt)
}

#[no_mangle]
pub unsafe extern "C" fn hex_deflate(content: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let msg_base64 = hex_to_base64(&content_str);
    str_to_cchar!(msg_base64)
}

#[no_mangle]
pub unsafe extern "C" fn hex_inflate(content: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let msg_hex = base64_to_hex(&content_str);
    str_to_cchar!(msg_hex)
}
// hash pasword of email register
#[no_mangle]
pub unsafe extern "C" fn hash_pass_svr(content: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let msg_hex = utils::crypto_utils::hash_pass_svr(&content_str);
    str_to_cchar!(msg_hex)
}
#[no_mangle]
pub unsafe extern "C" fn keccak256_hash(content: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let msg_hex = utils::crypto_utils::keccak256_hash(&content_str);
    str_to_cchar!(msg_hex)
}

#[no_mangle]
pub unsafe extern "C" fn aes_encrypt(content: *const c_char, key: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let pass = cchar_to_str!(key);
    let pass = utils::crypto_utils::keccak256_hash(pass);
    let msg_hex = utils::crypto_utils::aes_encrypt(&content_str, &pass);
    str_to_cchar!(msg_hex)
}

#[no_mangle]
pub unsafe extern "C" fn aes_decrypt(content: *const c_char, key: *const c_char) -> *mut c_char {
    let content_str = cchar_to_str!(content);
    let pass = cchar_to_str!(key);
    let pass = utils::crypto_utils::keccak256_hash(pass);
    let msg_hex = utils::crypto_utils::aes_decrypt(&content_str, &pass);
    str_to_cchar!(msg_hex)
}

#[no_mangle]
pub unsafe extern "C" fn local_pass_hasher(password: *const c_char) -> *mut c_char {
    let result = wallet_impl::local_pass_hasher(cchar_to_str!(password));
    str_to_cchar!(result)
}

#[no_mangle]
pub unsafe extern "C" fn verify_local_pass(
    password: *const c_char,
    pass_hash: *const c_char,
) -> bool {
    utils::crypto_utils::verify_password(cchar_to_str!(password), cchar_to_str!(pass_hash))
}

#[no_mangle]
pub unsafe extern "C" fn generate_client_key(
    password: *const c_char,
    openid: *const c_char,
    salt: *const c_char,
) -> *mut c_char {
    let result = wallet_impl::generate_client_key(
        cchar_to_str!(password),
        cchar_to_str!(openid),
        cchar_to_str!(salt),
    );
    str_to_cchar!(result)
}

unsafe fn generate_rwallet(
    msg_key: *const c_char,
    master_key: *const c_char,
    second_key: *const c_char,
) -> Wallet {
    let pmsg = cchar_to_string!(msg_key);
    let pm = cchar_to_string!(master_key);
    let second_key = cchar_to_string!(second_key);
    Wallet {
        msg_key: pmsg,
        master_key: pm,
        second_key: second_key,
    }
}