// This file is part of Substrate.

// Copyright (C) 2020 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::*;

use codec::{Encode, Decode};
use frame_support::{impl_outer_origin, parameter_types};
use sp_core::H256;
use sp_runtime::{
	Perbill,
	testing::{Header},
	traits::{BlakeTwo256, IdentityLookup},
};

impl_outer_origin! {
	pub enum Origin for Test where system = frame_system {}
}

#[derive(Clone, Eq, PartialEq, Encode, Decode)]
pub struct Test;
parameter_types! {
	pub const BlockHashCount: u64 = 250;
	pub const AvailableBlockRatio: Perbill = Perbill::one();
}

impl frame_system::Config for Test {
	type BaseCallFilter = ();
	type Origin = Origin;
	type Call = ();
	type PalletInfo = ();
	type Index = u64;
	type BlockNumber = u64;
	type Hash = H256;
	type Hashing = BlakeTwo256;
	type AccountId = sp_core::sr25519::Public;
	type Lookup = IdentityLookup<Self::AccountId>;
	type Header = Header;
	type Event = ();
	type BlockHashCount = BlockHashCount;
	type DbWeight = ();
	type BlockWeights = ();
	type BlockLength = ();
	type Version = ();
	type AccountData = ();
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
}

parameter_types! {
	pub const GracePeriod: u64 = 5;
	pub const UnsignedInterval: u64 = 128;
	pub const UnsignedPriority: u64 = 1 << 20;
}

impl Config for Test {
	type Event = ();
	type Call = Call<Test>;
}

type Example = Module<Test>;

#[test]
fn it_can_enlist() {
	use sp_core::Pair;

	sp_io::TestExternalities::default().execute_with(|| {
		let (pair1, _) = sp_core::sr25519::Pair::generate();
		let (pair2, _) = sp_core::sr25519::Pair::generate();

		let event_name = b"test";

		Example::run_event(Origin::signed(Default::default()), event_name.to_vec())
			.expect("Failed to enlist");

		let participants = vec![
			EnlistedParticipant {
				account: pair1.public().to_vec(),
				signature: AsRef::<[u8]>::as_ref(&pair1.sign(event_name)).to_vec(),
			},
			EnlistedParticipant {
				account: pair2.public().to_vec(),
				signature: AsRef::<[u8]>::as_ref(&pair2.sign(event_name)).to_vec(),
			},
		];

		Example::enlist_participants(Origin::signed(Default::default()), participants)
			.expect("Failed to enlist");

		assert_eq!(Example::participants().len(), 2);
	});

}

#[test]
fn one_wrong_will_not_enlist_anyone() {
	use sp_core::Pair;

	sp_io::TestExternalities::default().execute_with(|| {
		let (pair1, _) = sp_core::sr25519::Pair::generate();
		let (pair2, _) = sp_core::sr25519::Pair::generate();
		let (pair3, _) = sp_core::sr25519::Pair::generate();

		let event_name = b"test";

		Example::run_event(Origin::signed(Default::default()), event_name.to_vec())
			.expect("Failed to enlist");

		let participants = vec![
			EnlistedParticipant {
				account: pair1.public().to_vec(),
				signature: AsRef::<[u8]>::as_ref(&pair1.sign(event_name)).to_vec(),
			},
			EnlistedParticipant {
				account: pair2.public().to_vec(),
				signature: AsRef::<[u8]>::as_ref(&pair2.sign(event_name)).to_vec(),
			},
			// signing wrong event
			EnlistedParticipant {
				account: pair3.public().to_vec(),
				signature: AsRef::<[u8]>::as_ref(&pair3.sign(&[])).to_vec(),
			},
		];

		Example::enlist_participants(Origin::signed(Default::default()), participants)
			.expect("Failed to enlist");

		assert_eq!(Example::participants().len(), 0);
	});

}
