package com.example.citrusclient.views;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.media.Image;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.GridLayout;

import com.example.citrusclient.Citrus;
import com.example.citrusclient.R;
import com.example.citrusclient.models.Book;
import com.example.citrusclient.viewmodels.BooksViewModel;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link MyBookshelfFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class MyBookshelfFragment extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public MyBookshelfFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment MyBookshelfFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static MyBookshelfFragment newInstance(String param1, String param2) {
        MyBookshelfFragment fragment = new MyBookshelfFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }


    private List<Book> bookList;
    BooksViewModel booksViewModel;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }

        booksViewModel = new ViewModelProvider(this).get(BooksViewModel.class);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment

        return inflater.inflate(R.layout.fragment_my_bookshelf_fragment, container, false);

    }



    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);


        Citrus citrus = (Citrus)(getActivity().getApplication());
        String token = citrus.getToken();
        String accountId = citrus.getAccountId();

        bookList = new ArrayList<>();
//        bookList.add(new Book("a", 1, "a", true, "#ff0000"));

        RecyclerView recyclerView = view.findViewById(R.id.my_books_list);
        recyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(view.getContext(), 2);
                //new LinearLayoutManager(view.getContext());
        recyclerView.setLayoutManager(layoutManager);
        MyBookshelfAdapter bookAdapter = new MyBookshelfAdapter(bookList, getActivity());
        recyclerView.setAdapter(bookAdapter);

        FloatingActionButton addButton = view.findViewById(R.id.book_add_button);
        addButton.setOnClickListener(v -> {
            ((MainActivity) getActivity()).showFragment(new CreateBookFragment());
        });

        booksViewModel.getBookLiveData().observe(getViewLifecycleOwner(), new Observer<HashMap<Integer, Book>>() {
            @Override
            public void onChanged(HashMap<Integer, Book> integerBookHashMap) {
                if(integerBookHashMap != null){
                    bookList = new ArrayList<>(integerBookHashMap.values());
                }else{
                    bookList = new ArrayList<>();
                }
                bookAdapter.setBooks(bookList);
            }
        });

        booksViewModel.loadBooks(accountId, token);


    }

}

class MyBookshelfAdapter extends RecyclerView.Adapter<MyBookshelfAdapter.MyBookViewHolder>{

    private List<Book> bookList;
    private Context context;

    MyBookshelfAdapter(List<Book> book, Context context){
        this.bookList = book;
        this.context = context;
    }

    public void setBooks(List<Book> books){
        bookList = books;
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public MyBookViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.a_book, parent, false);
        return new MyBookViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MyBookViewHolder holder, int position) {
        Book bookData = this.bookList.get(position);
        holder.bookButton.setText(bookData.getTitle());
        int red;
        int green;
        int blue;
        if (bookData.getColor() == null){
            red = 255;
            green = 255;
            blue = 255;
        }
        else if(bookData.getColor().length() < 7){
            red = 255;
            green = 255;
            blue = 255;
        }else{
            red = Integer.parseInt(bookData.getColor().substring(1, 3), 16);
            green = Integer.parseInt(bookData.getColor().substring(3, 5), 16);
            blue = Integer.parseInt(bookData.getColor().substring(5, 7), 16);
        }

        holder.bookButton.setBackgroundColor(Color.rgb(red, green, blue));
        holder.bookButton.setTextColor(Color.rgb(255 - red, 255 - green, 255 - blue));
        holder.bookButton.setOnClickListener(v -> {
            Calendar c = Calendar.getInstance();
            Activity activity = (Activity) context;
            Citrus citrus = (Citrus) activity.getApplication();
            citrus.setCurYear(c.get(Calendar.YEAR));
            citrus.setCurMonth(c.get(Calendar.MONTH) + 1);
            citrus.setCurDay(c.get(Calendar.DATE));
            citrus.setCurBookId(bookData.getBookId());
            ((MainActivity) activity).showFragment(new HomeFragment());

        });
    }

    @Override
    public int getItemCount() {
        return bookList.size();
    }

    static class MyBookViewHolder extends RecyclerView.ViewHolder{
        Button bookButton;
        public MyBookViewHolder(@NonNull View itemView) {
            super(itemView);
            bookButton = itemView.findViewById(R.id.book_button);
        }
    }

}