// This file is part of Substrate.

// Copyright (C) 2019-2021 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 criterion::{Criterion, criterion_group, criterion_main, black_box};
use frame_system as system;
use frame_support::{decl_module, decl_event};
use sp_core::H256;
use sp_runtime::{Perbill, traits::{BlakeTwo256, IdentityLookup}, testing::Header};

mod module {
	use super::*;

	pub trait Config: system::Config {
		type Event: From<Event> + Into<<Self as system::Config>::Event>;
	}

	decl_module! {
		pub struct Module<T: Config> for enum Call where origin: T::Origin {
			pub fn deposit_event() = default;
		}
	}

	decl_event!(
		pub enum Event {
			Complex(Vec<u8>, u32, u16, u128),
		}
	);
}

type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Runtime>;
type Block = frame_system::mocking::MockBlock<Runtime>;

frame_support::construct_runtime!(
	pub enum Runtime where
		Block = Block,
		NodeBlock = Block,
		UncheckedExtrinsic = UncheckedExtrinsic,
	{
		System: frame_system::{Module, Call, Config, Storage, Event<T>},
		Module: module::{Module, Call, Event},
	}
);

frame_support::parameter_types! {
	pub const BlockHashCount: u64 = 250;
	pub BlockWeights: frame_system::limits::BlockWeights =
		frame_system::limits::BlockWeights::with_sensible_defaults(
			4 * 1024 * 1024, Perbill::from_percent(75),
		);
	pub BlockLength: frame_system::limits::BlockLength =
		frame_system::limits::BlockLength::max_with_normal_ratio(
			4 * 1024 * 1024, Perbill::from_percent(75),
		);
}
impl system::Config for Runtime {
	type BaseCallFilter = ();
	type BlockWeights = ();
	type BlockLength = BlockLength;
	type DbWeight = ();
	type Origin = Origin;
	type Index = u64;
	type BlockNumber = u64;
	type Call = Call;
	type Hash = H256;
	type Hashing = BlakeTwo256;
	type AccountId = u64;
	type Lookup = IdentityLookup<Self::AccountId>;
	type Header = Header;
	type Event = Event;
	type BlockHashCount = BlockHashCount;
	type Version = ();
	type PalletInfo = PalletInfo;
	type AccountData = ();
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
	type SS58Prefix = ();
}

impl module::Config for Runtime {
	type Event = Event;
}

fn new_test_ext() -> sp_io::TestExternalities {
	system::GenesisConfig::default().build_storage::<Runtime>().unwrap().into()
}

fn deposit_events(n: usize) {
	let mut t = new_test_ext();
	t.execute_with(|| {
		for _ in 0..n {
			module::Module::<Runtime>::deposit_event(
				module::Event::Complex(vec![1, 2, 3], 2, 3, 899)
			);
		}
	});
}

fn sr_system_benchmark(c: &mut Criterion) {
	c.bench_function("deposit 100 events", |b| {
		b.iter(|| deposit_events(black_box(100)))
	});
}

criterion_group!(benches, sr_system_benchmark);
criterion_main!(benches);