import { InternshipInfoDTO, InternshipRegistrationUpdate, SubmissionState } from "@/api/dto/internship-registration";
import { axios } from "@/api/index";
import { Nullable } from "@/helpers";

const INTERNSHIP_REGISTRATION_ENDPOINT = '/internshipRegistration';
const INTERNSHIP_ENDPOINT = '/internship';

export type ValidationMessage = {
    key: string;
    parameters: { [name: string]: string },
}

export class ValidationError extends Error {
    public readonly messages: ValidationMessage[];

    constructor(messages: ValidationMessage[], message: string = "There were validation errors.") {
        super(message);
        Object.setPrototypeOf(this, ValidationError.prototype);

        this.messages = messages;
    }
}

interface ApiError {
    key: string;
    parameters: { [name: string]: string },
}

interface UpdateResponse {
    status: SubmissionState;
    errors?: ApiError[];
}

export async function update(internship: Nullable<InternshipRegistrationUpdate>): Promise<SubmissionState> {
    const response = (await axios.put<UpdateResponse>(INTERNSHIP_REGISTRATION_ENDPOINT, internship)).data;

    if (response.status == SubmissionState.Draft) {
        throw new ValidationError(response.errors || []);
    }

    return response.status;
}

export async function get(): Promise<InternshipInfoDTO> {
    const response = await axios.get<InternshipInfoDTO>(INTERNSHIP_ENDPOINT);
    return response.data;
}