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// Copyright (C) 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.

//! Some common helpers for declaring runtime's presets
// note: copied from: cumulus/polkadot-parachain/src/chain_spec/mod.rs

use crate::{AccountId, Signature};
#[cfg(not(feature = "std"))]
use alloc::format;
use sp_core::{Pair, Public};
use sp_runtime::traits::{IdentifyAccount, Verify};

/// Helper function to generate a crypto pair from seed.
pub fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
	TPublic::Pair::from_string(&format!("//{seed}"), None)
		.expect("static values are valid; qed")
		.public()
}

type AccountPublic = <Signature as Verify>::Signer;

/// Helper function to generate an account id from seed.
pub fn get_account_id_from_seed<TPublic: Public>(seed: &str) -> AccountId
where
	AccountPublic: From<<TPublic::Pair as Pair>::Public>,
{
	AccountPublic::from(get_from_seed::<TPublic>(seed)).into_account()
}

/// Generate collator keys from seed.
///
/// This function's return type must always match the session keys of the chain in tuple format.
pub fn get_collator_keys_from_seed<AuraId: Public>(seed: &str) -> <AuraId::Pair as Pair>::Public {
	get_from_seed::<AuraId>(seed)
}