import type { EventEmitter, SendTransactionOptions, WalletName } from '@solana/wallet-adapter-base';
import {
    BaseMessageSignerWalletAdapter,
    scopePollingDetectionStrategy,
    WalletAccountError,
    WalletConnectionError,
    WalletDisconnectedError,
    WalletDisconnectionError,
    WalletError,
    WalletNotConnectedError,
    WalletNotReadyError,
    WalletPublicKeyError,
    WalletReadyState,
    WalletSendTransactionError,
    WalletSignMessageError,
    WalletSignTransactionError,
} from '@solana/wallet-adapter-base';
import type { Connection, SendOptions, Transaction, TransactionSignature } from '@solana/web3.js';
import { PublicKey } from '@solana/web3.js';

interface TokenaryWalletEvents {
    connect(...args: unknown[]): unknown;
    disconnect(...args: unknown[]): unknown;
}

interface TokenaryWallet extends EventEmitter<TokenaryWalletEvents> {
    isTokenary?: boolean;
    publicKey?: { toBytes(): Uint8Array };
    isConnected: boolean;
    signTransaction(transaction: Transaction): Promise<Transaction>;
    signAllTransactions(transactions: Transaction[]): Promise<Transaction[]>;
    signAndSendTransaction(
        transaction: Transaction,
        options?: SendOptions
    ): Promise<{ signature: TransactionSignature }>;
    signMessage(message: Uint8Array): Promise<{ signature: Uint8Array }>;
    connect(): Promise<void>;
    disconnect(): Promise<void>;
}

interface TokenaryWindow extends Window {
    tokenarySolana?: TokenaryWallet;
}

declare const window: TokenaryWindow;

export interface TokenaryWalletAdapterConfig {}

export const TokenaryWalletName = 'Tokenary' as WalletName<'Tokenary'>;

export class TokenaryWalletAdapter extends BaseMessageSignerWalletAdapter {
    name = TokenaryWalletName;
    url = 'https://tokenary.io/get';
    icon =
        'data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPHN2ZyB3aWR0aD0iMzRweCIgaGVpZ2h0PSIzNHB4IiB2aWV3Qm94PSIwIDAgMzQgMzQiIHZlcnNpb249IjEuMSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayI+CiAgICA8dGl0bGU+T3ZhbDwvdGl0bGU+CiAgICA8ZyBpZD0iUGFnZS0xIiBzdHJva2U9Im5vbmUiIHN0cm9rZS13aWR0aD0iMSIgZmlsbD0ibm9uZSIgZmlsbC1ydWxlPSJldmVub2RkIj4KICAgICAgICA8Y2lyY2xlIGlkPSJPdmFsIiBmaWxsPSIjMkM3Q0Y1IiBjeD0iMTciIGN5PSIxNyIgcj0iMTciPjwvY2lyY2xlPgogICAgPC9nPgo8L3N2Zz4=';

    private _connecting: boolean;
    private _wallet: TokenaryWallet | null;
    private _publicKey: PublicKey | null;
    private _readyState: WalletReadyState =
        typeof window === 'undefined' || typeof document === 'undefined'
            ? WalletReadyState.Unsupported
            : WalletReadyState.NotDetected;

    constructor(config: TokenaryWalletAdapterConfig = {}) {
        super();
        this._connecting = false;
        this._wallet = null;
        this._publicKey = null;

        if (this._readyState !== WalletReadyState.Unsupported) {
            scopePollingDetectionStrategy(() => {
                if (window.tokenarySolana?.isTokenary) {
                    this._readyState = WalletReadyState.Installed;
                    this.emit('readyStateChange', this._readyState);
                    return true;
                }
                return false;
            });
        }
    }

    get publicKey() {
        return this._publicKey;
    }

    get connecting() {
        return this._connecting;
    }

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

    get readyState() {
        return this._readyState;
    }

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

            this._connecting = true;

            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
            const wallet = window.tokenarySolana!;

            try {
                await wallet.connect();
            } catch (error: any) {
                throw new WalletConnectionError(error?.message, error);
            }

            if (!wallet.publicKey) throw new WalletAccountError();

            let publicKey: PublicKey;
            try {
                publicKey = new PublicKey(wallet.publicKey.toBytes());
            } catch (error: any) {
                throw new WalletPublicKeyError(error?.message, error);
            }

            wallet.on('disconnect', this._disconnected);

            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) {
            wallet.off('disconnect', this._disconnected);

            this._wallet = null;
            this._publicKey = null;

            try {
                await wallet.disconnect();
            } 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(transaction: Transaction): Promise<Transaction> {
        try {
            const wallet = this._wallet;
            if (!wallet) throw new WalletNotConnectedError();

            try {
                return (await wallet.signTransaction(transaction)) || transaction;
            } catch (error: any) {
                throw new WalletSignTransactionError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }

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

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

    private _disconnected = () => {
        const wallet = this._wallet;
        if (wallet) {
            wallet.off('disconnect', this._disconnected);

            this._wallet = null;
            this._publicKey = null;

            this.emit('error', new WalletDisconnectedError());
            this.emit('disconnect');
        }
    };
}
