package dev.garrettmills.starship.hyperlink.util;

import android.content.SharedPreferences;

import dev.garrettmills.starship.hyperlink.Hyperlink;

public class APIv1 {
    /**
     * Given an API endpoint, resolve the fully qualified URL using the stored server address.
     * Example:
     * resolveEndpoint("/auth/redeem")  // => "https://hyperlink.url/api/v1/auth/redeem"
     * @param endpoint un-qualified api endpoint
     * @return The resolved string.
     */
    public static String resolveEndpoint(String endpoint) {
        if ( !endpoint.startsWith("/") ) {
            endpoint = "/" + endpoint;
        }

        String server = Hyperlink.preferences.getString(Hyperlink.SERVER_ADDR, "");
        if ( server.endsWith("/") ) {
            server = server.substring(0, server.length() - 1);
        }

        return server + "/api/v1" + endpoint;
    }

    public static boolean isAuthenticated() {
        return !Hyperlink.preferences.getString(Hyperlink.SERVER_ADDR, "").equals("")
            && !Hyperlink.preferences.getString(Hyperlink.ACCESS_TOKEN, "").equals("");
    }

    public static AccessToken getToken() throws NotAuthenticatedException {
        if ( !isAuthenticated() ) {
            throw new NotAuthenticatedException();
        }

        return new AccessToken(
            Hyperlink.preferences.getString(Hyperlink.SERVER_ADDR, ""),
            Hyperlink.preferences.getString(Hyperlink.ACCESS_TOKEN, "")
        );
    }

    public static void logout() {
        SharedPreferences.Editor editor = Hyperlink.preferences.edit();
        editor.putString(Hyperlink.SERVER_ADDR, "");
        editor.putString(Hyperlink.ACCESS_TOKEN, "");
        editor.apply();
    }

    public static AccessToken login(LoginToken login) {
        AccessToken token = redeemLoginToken(login);
        SharedPreferences.Editor editor = Hyperlink.preferences.edit();
        editor.putString(Hyperlink.SERVER_ADDR, token.getServer());
        editor.putString(Hyperlink.ACCESS_TOKEN, token.getToken());
        editor.apply();
        return token;
    }

    /**
     * @fixme this is a stub placeholder. Replace with actual implementation
     * @param login the LoginToken from the user
     * @return the AccessToken redeemed from the server
     */
    protected static AccessToken redeemLoginToken(LoginToken login) {
        return new AccessToken(login.getServer(), login.getToken());
    }
}