// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity 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.

// Parity 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 Parity.  If not, see <http://www.gnu.org/licenses/>.

//! Client tests of tracing

use tempdir::TempDir;
use ethkey::KeyPair;
use hash::keccak;
use block::*;
use ethereum_types::{U256, Address};
use io::*;
use spec::*;
use client::*;
use tests::helpers::*;
use client::{BlockChainClient, Client, ClientConfig};
use kvdb_rocksdb::{Database, DatabaseConfig};
use std::sync::Arc;
use header::Header;
use miner::Miner;
use transaction::{Action, Transaction};
use views::BlockView;
use trace::{RewardType, LocalizedTrace};
use trace::trace::Action::Reward;

#[test]
fn can_trace_block_and_uncle_reward() {
	let tempdir = TempDir::new("").unwrap();
	let spec = Spec::new_test_with_reward();
	let engine = &*spec.engine;

	// Create client
	let db_config = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
	let mut client_config = ClientConfig::default();
	client_config.tracing.enabled = true;
	let client_db = Arc::new(Database::open(&db_config, tempdir.path().to_str().unwrap()).unwrap());
	let client = Client::new(
		client_config,
		&spec,
		client_db,
		Arc::new(Miner::with_spec(&spec)),
		IoChannel::disconnected(),
	).unwrap();

	// Create test data:
	// genesis
	//    |
	// root_block
	//    |
	// parent_block
	//    |
	// block with transaction and uncle

	let genesis_header = spec.genesis_header();
	let genesis_gas = genesis_header.gas_limit().clone();

	let mut db = spec.ensure_db_good(get_temp_state_db(), &Default::default()).unwrap();
	let mut rolling_timestamp = 40;
	let mut last_hashes = vec![];
	let mut last_header = genesis_header.clone();
	last_hashes.push(last_header.hash());

	let kp = KeyPair::from_secret_slice(&keccak("")).unwrap();
	let author = kp.address();

	// Add root block first
	let mut root_block = OpenBlock::new(
		engine,
		Default::default(),
		false,
		db,
		&last_header,
		Arc::new(last_hashes.clone()),
		author.clone(),
		(3141562.into(), 31415620.into()),
		vec![],
		false,
	).unwrap();
	root_block.set_difficulty(U256::from(0x20000));
	rolling_timestamp += 10;
	root_block.set_timestamp(rolling_timestamp);

	let root_block = root_block.close_and_lock().seal(engine, vec![]).unwrap();

	if let Err(e) = client.import_block(root_block.rlp_bytes()) {
		panic!("error importing block which is valid by definition: {:?}", e);
	}

	last_header = BlockView::new(&root_block.rlp_bytes()).header();
	let root_header = last_header.clone();
	db = root_block.drain();

	last_hashes.push(last_header.hash());

	// Add parent block
	let mut parent_block = OpenBlock::new(
		engine,
		Default::default(),
		false,
		db,
		&last_header,
		Arc::new(last_hashes.clone()),
		author.clone(),
		(3141562.into(), 31415620.into()),
		vec![],
		false,
	).unwrap();
	parent_block.set_difficulty(U256::from(0x20000));
	rolling_timestamp += 10;
	parent_block.set_timestamp(rolling_timestamp);

	let parent_block = parent_block.close_and_lock().seal(engine, vec![]).unwrap();

	if let Err(e) = client.import_block(parent_block.rlp_bytes()) {
		panic!("error importing block which is valid by definition: {:?}", e);
	}

	last_header = BlockView::new(&parent_block.rlp_bytes()).header();
	db = parent_block.drain();

	last_hashes.push(last_header.hash());

	// Add testing block with transaction and uncle
	let mut block = OpenBlock::new(
		engine,
		Default::default(),
		true,
		db,
		&last_header,
		Arc::new(last_hashes.clone()),
		author.clone(),
		(3141562.into(), 31415620.into()),
		vec![],
		false
		).unwrap();
	block.set_difficulty(U256::from(0x20000));
	rolling_timestamp += 10;
	block.set_timestamp(rolling_timestamp);

	let mut n = 0;
	for _ in 0..1 {
		block.push_transaction(Transaction {
			nonce: n.into(),
			gas_price: 10000.into(),
			gas: 100000.into(),
			action: Action::Create,
			data: vec![],
			value: U256::zero(),
		}.sign(kp.secret(), Some(spec.network_id())), None).unwrap();
		n += 1;
	}

	let mut uncle = Header::new();
	let uncle_author: Address = "ef2d6d194084c2de36e0dabfce45d046b37d1106".into();
	uncle.set_author(uncle_author);
	uncle.set_parent_hash(root_header.hash());
	uncle.set_gas_limit(genesis_gas);
	uncle.set_number(root_header.number() + 1);
	uncle.set_timestamp(rolling_timestamp);
	block.push_uncle(uncle).unwrap();

	let block = block.close_and_lock().seal(engine, vec![]).unwrap();

	let res = client.import_block(block.rlp_bytes());
	if res.is_err() {
		panic!("error importing block: {:#?}", res.err().unwrap());
	}

	block.drain();
	client.flush_queue();
	client.import_verified_blocks();

	// Test0. Check overall filter
	let filter = TraceFilter {
		range: (BlockId::Number(1)..BlockId::Number(3)),
		from_address: vec![],
		to_address: vec![],
		after: None,
		count: None,
	};

	let traces = client.filter_traces(filter);
	assert!(traces.is_some(), "Filtered traces should be present");
	let traces_vec = traces.unwrap();
	let block_reward_traces: Vec<LocalizedTrace> = traces_vec.clone().into_iter().filter(|trace| match (trace).action {
		Reward(ref a) => a.reward_type == RewardType::Block,
		_ => false,
	}).collect();
	assert_eq!(block_reward_traces.len(), 3);
	let uncle_reward_traces: Vec<LocalizedTrace> = traces_vec.clone().into_iter().filter(|trace| match (trace).action {
		Reward(ref a) => a.reward_type == RewardType::Uncle,
		_ => false,
	}).collect();
	assert_eq!(uncle_reward_traces.len(), 1);

	// Test1. Check block filter
	let traces = client.block_traces(BlockId::Number(3));
	assert_eq!(traces.unwrap().len(), 3);
}
