import type { WalletName } from '@solana/wallet-adapter-base';
import {
    BaseSignerWalletAdapter,
    scopePollingDetectionStrategy,
    WalletAccountError,
    WalletNotConnectedError,
    WalletNotReadyError,
    WalletPublicKeyError,
    WalletReadyState,
    WalletSignTransactionError,
} from '@solana/wallet-adapter-base';
import type { Transaction } from '@solana/web3.js';
import { PublicKey } from '@solana/web3.js';

interface CoinhubWallet {
    isCoinhubWallet?: boolean;
    getAccount(): Promise<string>;
    signTransaction(transaction: Transaction): Promise<Transaction>;
    signAllTransactions(transactions: Transaction[]): Promise<Transaction[]>;
}

interface CoinhubWalletWindow extends Window {
    coinhub?: CoinhubWallet;
}

declare const window: CoinhubWalletWindow;

export interface CoinhubWalletAdapterConfig {}

export const CoinhubWalletName = 'Coinhub' as WalletName<'Coinhub'>;

export class CoinhubWalletAdapter extends BaseSignerWalletAdapter {
    name = CoinhubWalletName;
    url = 'https://coinhub.org';
    icon =
        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';
    readonly supportedTransactionVersions = null;

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

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

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

    get publicKey() {
        return this._publicKey;
    }

    get connecting() {
        return this._connecting;
    }

    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.coinhub!;

            let account: string;
            try {
                account = await wallet.getAccount();
            } catch (error: any) {
                throw new WalletAccountError(error?.message, error);
            }

            let publicKey: PublicKey;
            try {
                publicKey = new PublicKey(account);
            } 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> {
        if (this._wallet) {
            this._wallet = null;
            this._publicKey = null;
        }

        this.emit('disconnect');
    }

    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;
            } 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[];
            } catch (error: any) {
                throw new WalletSignTransactionError(error?.message, error);
            }
        } catch (error: any) {
            this.emit('error', error);
            throw error;
        }
    }
}