use sp_core::{Pair, Public, sr25519, crypto::UncheckedInto};
use subsocial_runtime::{
	AccountId, AuraConfig, BalancesConfig,
	GenesisConfig, GrandpaConfig, UtilsConfig,
	SudoConfig, SpacesConfig, SystemConfig,
	WASM_BINARY, Signature, constants::currency::DOLLARS,
};
use sp_consensus_aura::sr25519::AuthorityId as AuraId;
use sp_finality_grandpa::AuthorityId as GrandpaId;
use sp_runtime::traits::{Verify, IdentifyAccount};
use sc_service::{ChainType, Properties};
use sc_telemetry::TelemetryEndpoints;
use hex_literal::hex;

// The URL for the telemetry server.
const STAGING_TELEMETRY_URL: &str = "wss://telemetry.polkadot.io/submit/";
const DEFAULT_PROTOCOL_ID: &str = "sub";

/// Specialized `ChainSpec`. This is a specialization of the general Substrate ChainSpec type.
pub type ChainSpec = sc_service::GenericChainSpec<GenesisConfig>;

/// 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;

/// 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 an Aura authority key.
pub fn authority_keys_from_seed(s: &str) -> (AuraId, GrandpaId) {
    (
        get_from_seed::<AuraId>(s),
        get_from_seed::<GrandpaId>(s),
    )
}

pub fn development_config() -> Result<ChainSpec, String> {
    let wasm_binary = WASM_BINARY.ok_or("Development wasm binary not available".to_string())?;

    Ok(ChainSpec::from_genesis(
        "Development",
        "dev",
        ChainType::Development,
        move || {
            let endowed_accounts = vec![
                get_account_id_from_seed::<sr25519::Public>("Alice"),
                get_account_id_from_seed::<sr25519::Public>("Bob"),
                get_account_id_from_seed::<sr25519::Public>("Charlie"),
                get_account_id_from_seed::<sr25519::Public>("Dave"),
                get_account_id_from_seed::<sr25519::Public>("Eve"),
            ];

            testnet_genesis(
                wasm_binary,
                vec![
                    authority_keys_from_seed("Alice"),
                ],
                get_account_id_from_seed::<sr25519::Public>("Alice"),
                endowed_accounts.iter().cloned().map(|k| (k, 100_000)).collect(),
                get_account_id_from_seed::<sr25519::Public>("Ferdie"),
                true,
            )
        },
        vec![],
        None,
        Some(DEFAULT_PROTOCOL_ID),
        Some(subsocial_properties()),
        None,
    ))
}

pub fn local_testnet_config() -> Result<ChainSpec, String> {
    let wasm_binary = WASM_BINARY.ok_or("Development wasm binary not available".to_string())?;

    Ok(ChainSpec::from_genesis(
        "Local Testnet",
        "local_testnet",
        ChainType::Local,
        move || {
            let endowed_accounts = vec![
                get_account_id_from_seed::<sr25519::Public>("Alice"),
                get_account_id_from_seed::<sr25519::Public>("Bob"),
                get_account_id_from_seed::<sr25519::Public>("Charlie"),
                get_account_id_from_seed::<sr25519::Public>("Dave"),
                get_account_id_from_seed::<sr25519::Public>("Eve"),
            ];

            testnet_genesis(
                wasm_binary,
                vec![
                    authority_keys_from_seed("Alice"),
                    authority_keys_from_seed("Bob"),
                ],
                get_account_id_from_seed::<sr25519::Public>("Alice"),
                endowed_accounts.iter().cloned().map(|k| (k, 100_000)).collect(),
                get_account_id_from_seed::<sr25519::Public>("Ferdie"),
                true,
            )
        },
        vec![],
        None,
        Some(DEFAULT_PROTOCOL_ID),
        Some(subsocial_properties()),
        None,
    ))
}

pub fn subsocial_config() -> Result<ChainSpec, String> {
	ChainSpec::from_json_bytes(&include_bytes!("../res/subsocial.json")[..])
}

pub fn subsocial_staging_config() -> Result<ChainSpec, String> {
    let wasm_binary = WASM_BINARY.ok_or("Staging wasm binary not available".to_string())?;

    Ok(ChainSpec::from_genesis(
        "Subsocial",
        "subsocial",
        ChainType::Live,
        move || testnet_genesis(
            wasm_binary,
            vec![
                (
                    /* AuraId SR25519 */
                    hex!["ac940b8ee399d42faeb7169f322e6623f8219d12ad4c42dfe0995fa9f9713a0d"].unchecked_into(),
                    /* GrandpaId ED25519 */
                    hex!["e97b51af33429b5c4ab8ddd9b3fc542d24154bbeef807d559eff3906afca8413"].unchecked_into()
                ),
                (
                    /* AuraId SR25519 */
                    hex!["0c053087dd7782de467228b5f826c5031be2faf315baa766a89b48bb6e2dfb71"].unchecked_into(),
                    /* GrandpaId ED25519 */
                    hex!["b48a83ed87ef39bc90c205fb551af3c076e1a952881d7fefec08cbb76e17ab8b"].unchecked_into()
                ),
            ],
            /* Sudo Account */
            hex!["24d6d7cd9a0500be768efc7b5508e7861cbde7cfc06819e4dfd9120b97d46d3e"].into(),
            vec![
                (
                    /* Sudo Account */
                    hex!["24d6d7cd9a0500be768efc7b5508e7861cbde7cfc06819e4dfd9120b97d46d3e"].into(),
                    /* Balance */
                    1_000
                ),
                (
                    /* Account X1 */
                    hex!["24d6d996a8bb42a63904afc36d610986e8d502f65898da62cb281cfe7f23b02f"].into(),
                    /* Balance */
                    2_499_000
                ),
                (
                    /* Account X2 */
                    hex!["24d6d8fc5d051fd471e275f14c83e95287d2b863e4cc802de1f78dea06c6ca78"].into(),
                    /* Balance */
                    2_500_000
                ),
                (
                    /* Account X3 */
                    hex!["24d6d901fb0531124040630e52cfd746ef7d037922c4baf290f513dbc3d47d66"].into(),
                    /* Balance */
                    2_500_000
                ),
                (
                    /* Account X4 */
                    hex!["24d6d22d63313e82f9461281cb69aacad1828dc74273274751fd24333b182c68"].into(),
                    /* Balance */
                    2_500_000
                ),
            ],
            // Treasury
            hex!["24d6d683750c4c10e90dd81430efec95133e1ec1f5be781d3267390d03174706"].into(),
            true,
        ),
        vec![],
        Some(TelemetryEndpoints::new(
            vec![(STAGING_TELEMETRY_URL.to_string(), 0)]
        ).expect("Staging telemetry url is valid; qed")),
        Some(DEFAULT_PROTOCOL_ID),
        Some(subsocial_properties()),
        None,
    ))
}

fn testnet_genesis(
    wasm_binary: &[u8],
	initial_authorities: Vec<(AuraId, GrandpaId)>,
	root_key: AccountId,
	endowed_accounts: Vec<(AccountId, u128)>,
	treasury_account_id: AccountId,
	_enable_println: bool
) -> GenesisConfig {
	GenesisConfig {
        frame_system: Some(SystemConfig {
			code: wasm_binary.to_vec(),
			changes_trie_config: Default::default(),
		}),
        pallet_balances: Some(BalancesConfig {
			balances: endowed_accounts.iter().cloned().map(|(k, b)|(k, b * DOLLARS)).collect(),
		}),
		pallet_aura: Some(AuraConfig {
			authorities: initial_authorities.iter().map(|x| (x.0.clone())).collect(),
		}),
        pallet_grandpa: Some(GrandpaConfig {
			authorities: initial_authorities.iter().map(|x| (x.1.clone(), 1)).collect(),
		}),
		pallet_sudo: Some(SudoConfig {
			key: root_key.clone(),
		}),
		pallet_utils: Some(UtilsConfig {
			treasury_account: treasury_account_id,
		}),
		pallet_spaces: Some(SpacesConfig {
			endowed_account: root_key,
		}),
	}
}

pub fn subsocial_properties() -> Properties {
	let mut properties = Properties::new();

	properties.insert("ss58Format".into(), 28.into());
	properties.insert("tokenDecimals".into(), 11.into());
	properties.insert("tokenSymbol".into(), "SUB".into());

	properties
}