// Copyright © 2020 Metabolist. All rights reserved.

import Foundation
import Combine

class MastodonClient: HTTPClient {
    var instanceURL: URL?
    var accessToken: String?

    required init(environment: AppEnvironment) {
        let decoder = MastodonDecoder()

        decoder.userInfo[.attributedStringCache] = environment.attributedStringCache

        super.init(session: environment.session, decoder: decoder)
    }

    override func request<T: DecodableTarget>(_ target: T) -> AnyPublisher<T.ResultType, Error> {
        super.request(target, decodeErrorsAs: MastodonError.self)
    }
}

extension MastodonClient {
    func request<E: MastodonEndpoint>(_ endpoint: E) -> AnyPublisher<E.ResultType, Error> {
        guard let instanceURL = instanceURL else {
            return Fail(error: URLError(.badURL)).eraseToAnyPublisher()
        }

        return super.request(
            MastodonTarget(baseURL: instanceURL, endpoint: endpoint, accessToken: accessToken),
            decodeErrorsAs: MastodonError.self)
    }
}