import type { SendTransactionOptions, WalletName } from '@solana/wallet-adapter-base';
import {
    BaseMessageSignerWalletAdapter,
    WalletAccountError,
    WalletConfigError,
    WalletConnectionError,
    WalletDisconnectionError,
    WalletError,
    WalletLoadError,
    WalletNotConnectedError,
    WalletNotReadyError,
    WalletPublicKeyError,
    WalletReadyState,
    WalletSendTransactionError,
    WalletSignMessageError,
    WalletSignTransactionError,
} from '@solana/wallet-adapter-base';
import type { Connection, Transaction, TransactionSignature } from '@solana/web3.js';
import { PublicKey } from '@solana/web3.js';
import type { default as Torus, TorusParams } from '@toruslabs/solana-embed';

export interface TorusWalletAdapterConfig {
    params?: TorusParams;
}

interface TorusWindow extends Window {
    torus?: Torus | null;
}

declare const window: TorusWindow;

export const TorusWalletName = 'Torus' as WalletName<'Torus'>;

export class TorusWalletAdapter extends BaseMessageSignerWalletAdapter {
    name = TorusWalletName;
    url = 'https://tor.us';
    icon =
        'data:image/svg+xml;base64,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';
    readonly supportedTransactionVersions = null;

    private _connecting: boolean;
    private _wallet: Torus | null;
    private _publicKey: PublicKey | null;
    private _params: TorusParams;
    private _readyState: WalletReadyState =
        typeof window === 'undefined' || typeof document === 'undefined'
            ? WalletReadyState.Unsupported
            : WalletReadyState.Loadable;

    constructor(
        { params = { showTorusButton: false } }: TorusWalletAdapterConfig = { params: { showTorusButton: false } }
    ) {
        super();
        this._connecting = false;
        this._wallet = null;
        this._publicKey = null;
        this._params = params;
    }

    get publicKey() {
        return this._publicKey;
    }

    get connecting() {
        return this._connecting;
    }

    get connected() {
        return !!this._wallet?.isLoggedIn;
    }

    get readyState() {
        return this._readyState;
    }

    async connect(): Promise<void> {
        try {
            if (this.connected || this.connecting) return;
            if (this._readyState !== WalletReadyState.Loadable) throw new WalletNotReadyError();

            this._connecting = true;

            let TorusClass: typeof Torus;
            try {
                TorusClass = (await import('@toruslabs/solana-embed')).default;
            } catch (error: any) {
                throw new WalletLoadError(error?.message, error);
            }

            let wallet: Torus;
            try {
                wallet = window.torus || new TorusClass();
            } catch (error: any) {
                throw new WalletConfigError(error?.message, error);
            }

            if (!wallet.isInitialized) {
                try {
                    await wallet.init(this._params);
                } catch (error: any) {
                    throw new WalletConnectionError(error?.message, error);
                }
            }

            let accounts: string[];
            try {
                accounts = await wallet.login();
            } catch (error: any) {
                throw new WalletAccountError(error?.message, error);
            }

            let publicKey: PublicKey;
            try {
                // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
                publicKey = new PublicKey(accounts[0]!);
            } catch (error: any) {
                throw new WalletPublicKeyError(error?.message, error);
            }

            this._wallet = wallet;
            this._publicKey = publicKey;

            this.emit('connect', publicKey);
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        } finally {
            this._connecting = false;
        }
    }

    async disconnect(): Promise<void> {
        const wallet = this._wallet;
        if (wallet) {
            this._wallet = null;
            this._publicKey = null;

            try {
                if (wallet.isLoggedIn) await wallet.cleanUp();
            } catch (error: any) {
                this.emit('error', new WalletDisconnectionError(error?.message, error));
            }
        }

        this.emit('disconnect');
    }

    async sendTransaction(
        transaction: Transaction,
        connection: Connection,
        options: SendTransactionOptions = {}
    ): Promise<TransactionSignature> {
        try {
            const wallet = this._wallet;
            if (!wallet) throw new WalletNotConnectedError();

            try {
                const { signers, ...sendOptions } = options;

                transaction = await this.prepareTransaction(transaction, connection, sendOptions);

                signers?.length && transaction.partialSign(...signers);

                sendOptions.preflightCommitment = sendOptions.preflightCommitment || connection.commitment;

                const { signature } = await wallet.signAndSendTransaction(transaction, sendOptions);
                return signature;
            } catch (error: any) {
                if (error instanceof WalletError) throw error;
                throw new WalletSendTransactionError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }

    async signTransaction<T extends Transaction>(transaction: T): Promise<T> {
        try {
            const wallet = this._wallet;
            if (!wallet) throw new WalletNotConnectedError();

            try {
                return ((await wallet.signTransaction(transaction)) as T) || transaction;
            } catch (error: any) {
                throw new WalletSignTransactionError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }

    async signAllTransactions<T extends Transaction>(transactions: T[]): Promise<T[]> {
        try {
            const wallet = this._wallet;
            if (!wallet) throw new WalletNotConnectedError();

            try {
                return ((await wallet.signAllTransactions(transactions)) as T[]) || transactions;
            } catch (error: any) {
                throw new WalletSignTransactionError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }

    async signMessage(message: Uint8Array): Promise<Uint8Array> {
        try {
            const wallet = this._wallet;
            if (!wallet) throw new WalletNotConnectedError();

            try {
                return await wallet.signMessage(message);
            } catch (error: any) {
                throw new WalletSignMessageError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }
}