// Copyright 2018 Parity Technologies (UK) Ltd.
// This file is part of Substrate.

// Substrate 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.

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

//! Test utilities

#![cfg(test)]

use primitives::BuildStorage;
use primitives::testing::{Digest, DigestItem, Header};
use substrate_primitives::{H256, Blake2Hasher};
use runtime_io;
use {GenesisConfig, Module, Trait, system};

impl_outer_origin!{
	pub enum Origin for Runtime {}
}

// Workaround for https://github.com/rust-lang/rust/issues/26925 . Remove when sorted.
#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
pub struct Runtime;
impl system::Trait for Runtime {
	type Origin = Origin;
	type Index = u64;
	type BlockNumber = u64;
	type Hash = H256;
	type Hashing = ::primitives::traits::BlakeTwo256;
	type Digest = Digest;
	type AccountId = u64;
	type Header = Header;
	type Event = ();
	type Log = DigestItem;
}
impl Trait for Runtime {
	type Balance = u64;
	type AccountIndex = u64;
	type OnFreeBalanceZero = ();
	type EnsureAccountLiquid = ();
	type Event = ();
}

pub struct ExtBuilder {
	existential_deposit: u64,
	transfer_fee: u64,
	creation_fee: u64,
	monied: bool,
}
impl Default for ExtBuilder {
	fn default() -> Self {
		Self {
			existential_deposit: 0,
			transfer_fee: 0,
			creation_fee: 0,
			monied: false,
		}
	}
}
impl ExtBuilder {
	pub fn existential_deposit(mut self, existential_deposit: u64) -> Self {
		self.existential_deposit = existential_deposit;
		self
	}
	#[allow(dead_code)]
	pub fn transfer_fee(mut self, transfer_fee: u64) -> Self {
		self.transfer_fee = transfer_fee;
		self
	}
	pub fn creation_fee(mut self, creation_fee: u64) -> Self {
		self.creation_fee = creation_fee;
		self
	}
	pub fn monied(mut self, monied: bool) -> Self {
		self.monied = monied;
		self
	}
	pub fn build(self) -> runtime_io::TestExternalities<Blake2Hasher> {
		let mut t = system::GenesisConfig::<Runtime>::default().build_storage().unwrap().0;
		let balance_factor = if self.existential_deposit > 0 {
			256
		} else {
			1
		};
		t.extend(GenesisConfig::<Runtime> {
			balances: if self.monied {
				vec![(1, 10 * balance_factor), (2, 20 * balance_factor), (3, 30 * balance_factor), (4, 40 * balance_factor)]
			} else {
				vec![(10, balance_factor), (20, balance_factor)]
			},
			transaction_base_fee: 0,
			transaction_byte_fee: 0,
			existential_deposit: self.existential_deposit,
			transfer_fee: self.transfer_fee,
			creation_fee: self.creation_fee,
			reclaim_rebate: 0,
			_genesis_phantom_data: Default::default(),
		}.build_storage().unwrap().0);
		t.into()
	}
}

pub type System = system::Module<Runtime>;
pub type Balances = Module<Runtime>;