// Copyright 2020 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.

use tokio::{time::delay_for as sleep, task::spawn};
use futures::{pin_mut, select, FutureExt as _};
use polkadot_test_service::*;
use sp_keyring::Sr25519Keyring::{Alice, Bob};
use std::time::Duration;

static INTEGRATION_TEST_ALLOWED_TIME: Option<&str> = option_env!("INTEGRATION_TEST_ALLOWED_TIME");

#[tokio::test]
async fn call_function_actually_work() {
	let mut alice = run_test_node(
		(move |fut, _| {
			spawn(fut);
		})
		.into(),
		Alice,
		|| {},
		Vec::new(),
	);
	let t1 = sleep(Duration::from_secs(
		INTEGRATION_TEST_ALLOWED_TIME
			.and_then(|x| x.parse().ok())
			.unwrap_or(600),
	))
	.fuse();
	let t2 = async {
		let function = polkadot_test_runtime::Call::Balances(pallet_balances::Call::transfer(
			Default::default(),
			1,
		));
		let output = alice.call_function(function, Bob).await.unwrap();

		let res = output.result.expect("return value expected");
		let json = serde_json::from_str::<serde_json::Value>(res.as_str()).expect("valid JSON");
		let object = json.as_object().expect("JSON is an object");
		assert!(object.contains_key("jsonrpc"), "key jsonrpc exists");
		let result = object.get("result");
		let result = result.expect("key result exists");
		assert_eq!(
			result.as_str().map(|x| x.starts_with("0x")),
			Some(true),
			"result starts with 0x"
		);

		alice.task_manager.terminate();
	}
	.fuse();

	pin_mut!(t1, t2);

	select! {
		_ = t1 => {
			panic!("the test took too long, maybe no blocks have been produced");
		},
		_ = t2 => {},
	}
}