use serde_json::json;
use sc_cli::{
    OutputType,
    utils::{PublicFor, SeedFor},
};
use sp_runtime::{traits::IdentifyAccount, MultiSigner};
use sp_core::{
    crypto::{
        unwrap_or_default_ss58_version,
        Ss58Codec, ExposeSecret, Ss58AddressFormat, SecretString,
    },
    hexdisplay::HexDisplay,
};

pub fn print_from_uri<Pair>(
	uri: &str,
	password: Option<SecretString>,
	network_override: Option<Ss58AddressFormat>,
	output: OutputType,
) where
	Pair: sp_core::Pair,
	Pair::Public: Into<MultiSigner>,
{
	let password = password.as_ref().map(|s| s.expose_secret().as_str());
	let network_id = unwrap_or_default_ss58_name(network_override);

	if let Ok((pair, seed)) = Pair::from_phrase(uri, password) {
		let public_key = pair.public();
		let network_override = unwrap_or_default_ss58_version(network_override);

		match output {
			OutputType::Json => {
				let json = json!({
					"secretPhrase": uri,
					"networkId": network_id,
					"secretSeed": format_seed::<Pair>(seed),
					"publicKey": format_public_key::<Pair>(public_key.clone()),
					"ss58PublicKey": public_key.to_ss58check_with_version(network_override),
					"accountId": format_account_id::<Pair>(public_key),
					"ss58Address": pair.public().into().into_account().to_ss58check_with_version(network_override),
				});
				println!(
					"{}",
					serde_json::to_string_pretty(&json).expect("Json pretty print failed")
				);
			},
			OutputType::Text => {
				println!(
					"Secret phrase:       {}\n  \
					Network ID:        {}\n  \
					Secret seed:       {}\n  \
					Public key (hex):  {}\n  \
					Account ID:        {}\n  \
					Public key (SS58): {}\n  \
					SS58 Address:      {}",
					uri,
					network_id,
					format_seed::<Pair>(seed),
					format_public_key::<Pair>(public_key.clone()),
					format_account_id::<Pair>(public_key.clone()),
					public_key.to_ss58check_with_version(network_override),
					pair.public().into().into_account().to_ss58check_with_version(network_override),
				);
			},
		}
	} else if let Ok((pair, seed)) = Pair::from_string_with_seed(uri, password) {
		let public_key = pair.public();
		let network_override = unwrap_or_default_ss58_version(network_override);

		match output {
			OutputType::Json => {
				let json = json!({
					"secretKeyUri": uri,
					"networkId": network_id,
					"secretSeed": if let Some(seed) = seed { format_seed::<Pair>(seed) } else { "n/a".into() },
					"publicKey": format_public_key::<Pair>(public_key.clone()),
					"ss58PublicKey": public_key.to_ss58check_with_version(network_override),
					"accountId": format_account_id::<Pair>(public_key),
					"ss58Address": pair.public().into().into_account().to_ss58check_with_version(network_override),
				});
				println!(
					"{}",
					serde_json::to_string_pretty(&json).expect("Json pretty print failed")
				);
			},
			OutputType::Text => {
				println!(
					"Secret Key URI `{}` is account:\n  \
					Network ID:        {}\n  \
					Secret seed:       {}\n  \
					Public key (hex):  {}\n  \
					Account ID:        {}\n  \
					Public key (SS58): {}\n  \
					SS58 Address:      {}",
					uri,
					network_id,
					if let Some(seed) = seed { format_seed::<Pair>(seed) } else { "n/a".into() },
					format_public_key::<Pair>(public_key.clone()),
					format_account_id::<Pair>(public_key.clone()),
					public_key.to_ss58check_with_version(network_override),
					pair.public().into().into_account().to_ss58check_with_version(network_override),
				);
			},
		}
	} else if let Ok((public_key, network)) = Pair::Public::from_string_with_version(uri) {
		let network_override = network_override.unwrap_or(network);

		match output {
			OutputType::Json => {
				let json = json!({
					"publicKeyUri": uri,
					"networkId": String::from(network_override),
					"publicKey": format_public_key::<Pair>(public_key.clone()),
					"accountId": format_account_id::<Pair>(public_key.clone()),
					"ss58PublicKey": public_key.to_ss58check_with_version(network_override),
					"ss58Address": public_key.to_ss58check_with_version(network_override),
				});

				println!(
					"{}",
					serde_json::to_string_pretty(&json).expect("Json pretty print failed")
				);
			},
			OutputType::Text => {
				println!(
					"Public Key URI `{}` is account:\n  \
					 Network ID/Version: {}\n  \
					 Public key (hex):   {}\n  \
					 Account ID:         {}\n  \
					 Public key (SS58):  {}\n  \
					 SS58 Address:       {}",
					uri,
					String::from(network_override),
					format_public_key::<Pair>(public_key.clone()),
					format_account_id::<Pair>(public_key.clone()),
					public_key.to_ss58check_with_version(network_override),
					public_key.to_ss58check_with_version(network_override),
				);
			},
		}
	} else {
		println!("Invalid phrase/URI given");
	}
}

/// Try to parse given `public` as hex encoded public key and print relevant information.
pub fn print_from_public<Pair>(
	public_str: &str,
	network_override: Option<Ss58AddressFormat>,
	output: OutputType,
) -> Result<(), sc_cli::Error>
where
	Pair: sp_core::Pair,
	Pair::Public: Into<MultiSigner>,
{
	let public = array_bytes::hex2bytes(public_str)?;

	let public_key = Pair::Public::try_from(&public)
		.map_err(|_| "Failed to construct public key from given hex")?;

	let network_override = unwrap_or_default_ss58_version(network_override);

	match output {
		OutputType::Json => {
			let json = json!({
				"networkId": String::from(network_override),
				"publicKey": format_public_key::<Pair>(public_key.clone()),
				"accountId": format_account_id::<Pair>(public_key.clone()),
				"ss58PublicKey": public_key.to_ss58check_with_version(network_override),
				"ss58Address": public_key.to_ss58check_with_version(network_override),
			});

			println!("{}", serde_json::to_string_pretty(&json).expect("Json pretty print failed"));
		},
		OutputType::Text => {
			println!(
				"Network ID/Version: {}\n  \
				 Public key (hex):   {}\n  \
				 Account ID:         {}\n  \
				 Public key (SS58):  {}\n  \
				 SS58 Address:       {}",
				String::from(network_override),
				format_public_key::<Pair>(public_key.clone()),
				format_account_id::<Pair>(public_key.clone()),
				public_key.to_ss58check_with_version(network_override),
				public_key.to_ss58check_with_version(network_override),
			);
		},
	}

	Ok(())
}

pub fn unwrap_or_default_ss58_name(x: Option<Ss58AddressFormat>) -> String {
    if let Some(x) = x {
        let name = match x.prefix() {
            1995 => String::from("Ghost"),
            1996 => String::from("Casper"),
            _ => String::from("Unwknown"),
        };
        format!("{} ({})", name, x.prefix())
    } else {
        String::from("Unknown (unknown)")
    }
}

pub fn format_seed<P: sp_core::Pair>(seed: SeedFor<P>) -> String {
    format!("0x{}", HexDisplay::from(&seed.as_ref()))
}

fn format_public_key<P: sp_core::Pair>(public_key: PublicFor<P>) -> String {
    format!("0x{}", HexDisplay::from(&public_key.as_ref()))
}

fn format_account_id<P: sp_core::Pair>(public_key: PublicFor<P>) -> String
where
    PublicFor<P>: Into<MultiSigner>,
{
    format!("0x{}", HexDisplay::from(&public_key.into().into_account().as_ref()))
}