use crate::{cache, gdev, indexer::*, Args, Client};

use anyhow::{anyhow, Result};
use sp_core::{crypto::AccountId32, sr25519::Pair, Pair as _};
use std::ops::Deref;
use subxt::tx::{BaseExtrinsicParamsBuilder, PairSigner};

type SessionKeys = [u8; 128];

pub async fn rotate_keys(client: &Client) -> Result<SessionKeys> {
	client
		.rpc()
		.rotate_keys()
		.await?
		.deref()
		.try_into()
		.map_err(|e| anyhow!("Session keys have wrong length: {:?}", e))
}

pub async fn set_session_keys(pair: Pair, client: Client, session_keys: SessionKeys) -> Result<()> {
	client
		.tx()
		.sign_and_submit_then_watch(
			&gdev::tx()
				.authority_members()
				.set_session_keys(session_keys),
			&PairSigner::new(pair),
			BaseExtrinsicParamsBuilder::new(),
		)
		.await?;

	Ok(())
}

pub async fn update_session_keys(pair: Pair, client: Client) -> Result<()> {
	let session_keys = rotate_keys(&client).await?;
	set_session_keys(pair, client, session_keys).await
}

pub async fn go_online(pair: Pair, client: Client) -> Result<()> {
	if client
		.storage()
		.fetch(
			&gdev::storage()
				.session()
				.next_keys(AccountId32::from(pair.public())),
			None,
		)
		.await?
		.is_none()
	{
		return Err(anyhow!("This account has not set session keys!"));
	}

	client
		.tx()
		.sign_and_submit_then_watch(
			&gdev::tx().authority_members().go_online(),
			&PairSigner::new(pair),
			BaseExtrinsicParamsBuilder::new(),
		)
		.await?;

	Ok(())
}

pub async fn go_offline(pair: Pair, client: Client) -> Result<()> {
	client
		.tx()
		.sign_and_submit_then_watch(
			&gdev::tx().authority_members().go_offline(),
			&PairSigner::new(pair),
			BaseExtrinsicParamsBuilder::new(),
		)
		.await?;

	Ok(())
}

pub async fn online(client: Client, args: &Args) -> Result<()> {
	let parent_hash = client
		.storage()
		.fetch(&gdev::storage().system().parent_hash(), None)
		.await?
		.unwrap();

	let gql_client = reqwest::Client::builder()
		.user_agent("gcli/0.1.0")
		.build()?;

	let mut identity_cache = cache::IdentityCache::new(
		&client,
		if args.no_indexer {
			None
		} else {
			Some(Indexer {
				gql_client,
				gql_url: &args.indexer,
			})
		},
	);

	let online_authorities = client
		.storage()
		.fetch(
			&gdev::storage().authority_members().online_authorities(),
			Some(parent_hash),
		)
		.await?
		.unwrap_or_default();

	println!("Online:");
	for identity_id in online_authorities {
		println!(
			"  {}",
			identity_cache
				.fetch_identity(identity_id, parent_hash)
				.await
				.unwrap_or_else(|_| format!("{identity_id}"))
		);
	}

	let incoming_authorities = client
		.storage()
		.fetch(
			&gdev::storage().authority_members().incoming_authorities(),
			Some(parent_hash),
		)
		.await?
		.unwrap_or_default();

	println!("Incoming:");
	for identity_id in incoming_authorities {
		println!(
			"  {}",
			identity_cache
				.fetch_identity(identity_id, parent_hash)
				.await
				.unwrap_or_else(|_| format!("{identity_id}"))
		);
	}

	let outgoing_authorities = client
		.storage()
		.fetch(
			&gdev::storage().authority_members().outgoing_authorities(),
			Some(parent_hash),
		)
		.await?
		.unwrap_or_default();

	println!("Outgoing:");
	for identity_id in outgoing_authorities {
		println!(
			"  {}",
			identity_cache
				.fetch_identity(identity_id, parent_hash)
				.await
				.unwrap_or_else(|_| format!("{identity_id}"))
		);
	}

	Ok(())
}