// This file is part of Substrate.

// Copyright (C) 2019-2022 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::{black_box, criterion_group, criterion_main, Criterion};
use frame_support::traits::{ConstU32, ConstU64};
use sp_core::H256;
use sp_runtime::{
	testing::Header,
	traits::{BlakeTwo256, IdentityLookup},
	Perbill,
};

#[frame_support::pallet]
mod module {
	use frame_support::pallet_prelude::*;

	#[pallet::pallet]
	#[pallet::generate_store(pub(super) trait Store)]
	pub struct Pallet<T>(_);

	#[pallet::config]
	pub trait Config: frame_system::Config {
		type Event: From<Event> + IsType<<Self as frame_system::Config>::Event>;
	}

	#[pallet::event]
	#[pallet::generate_deposit(pub(super) fn deposit_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::{Pallet, Call, Config, Storage, Event<T>},
		Module: module::{Pallet, Event},
	}
);

frame_support::parameter_types! {
	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 frame_system::Config for Runtime {
	type BaseCallFilter = frame_support::traits::Everything;
	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 = ConstU64<250>;
	type Version = ();
	type PalletInfo = PalletInfo;
	type AccountData = ();
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
	type SS58Prefix = ();
	type OnSetCode = ();
	type MaxConsumers = ConstU32<16>;
}

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

fn new_test_ext() -> sp_io::TestExternalities {
	frame_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::Pallet::<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);
