package cg.cits.koumbangai;

import android.content.Context;
import android.content.Intent;
import android.util.Log;

import androidx.annotation.NonNull;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.FirebaseFirestore;

public class FirebaseHelper {

    // Set to true when user is logged in and profile exists for that user
    // Else false
    public static boolean loggedIn = false;
    public static boolean userJustCreated = false;

    // Used at login checks to send user to login screen if not logged in
    public static void GoToLogin(Context context)
    {
        Intent intent = new Intent(context, LogInActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }

    // Simpler way to get current user's uid
    public static String getUid()
    {
        return FirebaseAuth.getInstance().getCurrentUser().getUid();
    }

    // Function for checking that user is valid - and thus has a complete profile...
    // On success :: sets loggedIn to true
    // On failure :: sends user to profile edit Activity
    public static void checkProfileCreated(final Context context)
    {
        String uid = getUid();

        // Fetching profile data from database
        FirebaseFirestore.getInstance().collection("users").document(uid).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                boolean profileCreated = false;

                if(task.getResult().exists())
                {
                    // Data fetched successfully, getting "profile created"-variable
                    profileCreated = task.getResult().toObject(User.class).getProfileCreated();
                    if(profileCreated)
                        loggedIn = true;
                    else
                    {
                        // User has no set profile => sending user to profile edit Activity
                        // If document exists, passing it as an intent extra
                        // HOWEVER, if user has just been created, they will be automatically send there anyway
                        // And therefore not needed to go there twice...
                        if(!userJustCreated) {
                            Intent intent = new Intent(context, EditProfileActivity.class);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            try {
                                User user = task.getResult().toObject(User.class);
                                intent.putExtra("USERINFO", user);
                            } catch(Exception e) {
                                Log.d("CHECK_PROFILE_CREATED_ERROR", "Failed document to Object");
                            }
                            context.startActivity(intent);
                        }
                    }
                }
                else
                {
                    // User has no document...
                    if(!userJustCreated)
                    {
                        Intent intent = new Intent(context, EditProfileActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        context.startActivity(intent);
                    }
                }
            }
        });
    }
}