import { AxiosInstance } from 'axios';
import { Signature } from 'ethers';
import { TypedDataDomain, TypedDataField } from "../web3/provider";

export class BackendApi {
    _axiosInstance: AxiosInstance;

    /**
     * Construct the Api instance. Pass
     * the axios instance as a dependency.
     * @param axiosInstance
     */
    constructor(axiosInstance: AxiosInstance) {
        this._axiosInstance = axiosInstance;
    }

    /**
     * This returns a nonce for a given user.
     * @param address
     * @return nonce
     */
    public async generateNonce(address: string) {
        const nonce = await this._axiosInstance.post(`/users/${address}`);
        return nonce.data;
    }

    /**
     * This verifies that a signature is valid.
     * @param address
     * @param isSmartWallet
     * @param domain
     * @param types
     * @param signature
     */
    public async verifySignature(
        address: string,
        isSmartWallet: boolean,
        domain: TypedDataDomain,
        types: { AuthSignature: Array<TypedDataField>; },
        signature: Signature) {
        const jwtResponse = await this._axiosInstance.post(
            `/users/${address}/verify-signature`,
            {
                address,
                isSmartWallet,
                domain,
                types,
                signature,
            }
        );

        return jwtResponse.data;
    }
}