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.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageButton;
import android.widget.TextView;

import com.example.citrusclient.Citrus;
import com.example.citrusclient.R;
import com.example.citrusclient.models.Book;
import com.example.citrusclient.models.Schedule;
import com.example.citrusclient.models.Todo;
import com.example.citrusclient.viewmodels.BooksViewModel;
import com.example.citrusclient.viewmodels.ScheduleViewModel;
import com.example.citrusclient.viewmodels.TodosViewModel;
import com.google.android.material.floatingactionbutton.FloatingActionButton;

import java.security.PrivateKey;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;

import java.time.LocalDate;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link HomeFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class HomeFragment 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 HomeFragment() {
        // 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 HomeFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static HomeFragment newInstance(String param1, String param2) {
        HomeFragment fragment = new HomeFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

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

        Citrus citrus = (Citrus)(getActivity().getApplication());
        year = citrus.getCurYear();
        month = citrus.getCurMonth();
        day = citrus.getCurDay();

        todosViewModel = new ViewModelProvider(this).get(TodosViewModel.class);
        scheduleViewModel = new ViewModelProvider(this).get(ScheduleViewModel.class);
        booksViewModel = new ViewModelProvider(this).get(BooksViewModel.class);

    }

    @Override
    public void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("year", year);
        outState.putInt("month", month);
        outState.putInt("day", day);
    }


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

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

    private List<Todo> todoList;
    TodosViewModel todosViewModel;
    private List<Schedule> scheduleList;
    ScheduleViewModel scheduleViewModel;

    private HashMap<Integer, Book> integerBookHashMap;
    BooksViewModel booksViewModel;

    LocalDate curDate;

    int year ;
    int month;
    int day;


    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();

        curDate = LocalDate.of(year, month, day);

        todoList = new ArrayList<>();
        scheduleList = new ArrayList<>();

        Button curDateButton = view.findViewById(R.id.date_button);
        curDateButton.setText(year + "年" + month + "月" + day + "日");


        RecyclerView todoRecyclerView = view.findViewById(R.id.my_todos_list);
        todoRecyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(view.getContext());
        todoRecyclerView.setLayoutManager(layoutManager);
        MyTodoshelfAdapter todoAdapter = new MyTodoshelfAdapter(todoList, integerBookHashMap, todosViewModel, citrus, getActivity());
        todoRecyclerView.setAdapter(todoAdapter);

        RecyclerView scheduleRecyclerView = view.findViewById(R.id.my_schedule_list);
        scheduleRecyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager scheduleLayoutManager = new LinearLayoutManager(view.getContext());
        scheduleRecyclerView.setLayoutManager(scheduleLayoutManager);
        MyScheduleshelfAdapter scheduleAdapter = new MyScheduleshelfAdapter(scheduleList, integerBookHashMap);
        scheduleRecyclerView.setAdapter(scheduleAdapter);


        FloatingActionButton todoAddButton = view.findViewById(R.id.todo_add_button);
        todoAddButton.setOnClickListener(v -> {
            ((MainActivity) getActivity()).showFragment(new CreateTodoFragment(year, month, day));
            todoAdapter.notifyDataSetChanged();
        });

        FloatingActionButton scheduleAddButton = view.findViewById(R.id.schedule_add_button);
        scheduleAddButton.setOnClickListener(v -> {
            ((MainActivity) getActivity()).showFragment(new CreateScheduleFragment());
            scheduleAdapter.notifyDataSetChanged();
        });

        ImageButton prevBotton = view.findViewById(R.id.prev_day_botton);
        prevBotton.setOnClickListener(v -> {
            curDate = curDate.minusDays(1);
            year = curDate.getYear();
            month = curDate.getMonthValue();
            day = curDate.getDayOfMonth();
            curDateButton.setText(year + "年" + month + "月" + day + "日");

            updateTodoSchedule(integerBookHashMap);
            todoAdapter.notifyDataSetChanged();
            scheduleAdapter.notifyDataSetChanged();
        });

        ImageButton nextBotton = view.findViewById(R.id.next_day_botton);
        nextBotton.setOnClickListener(v -> {
            curDate = curDate.plusDays(1);
            year = curDate.getYear();
            month = curDate.getMonthValue();
            day = curDate.getDayOfMonth();
            curDateButton.setText(year + "年" + month + "月" + day + "日");
            updateTodoSchedule(integerBookHashMap);
            todoAdapter.notifyDataSetChanged();
            scheduleAdapter.notifyDataSetChanged();

        });


        booksViewModel.loadBooks(accountId, token);
        scheduleViewModel.updateSchedulesByDay(accountId, year, month, day, token);
        System.out.println(token);

        booksViewModel.getBookLiveData().observe(getViewLifecycleOwner(), new Observer<HashMap<Integer, Book>>() {
            @Override
            public void onChanged(HashMap<Integer, Book> idBookHashMap) {
                updateTodoSchedule(idBookHashMap);
                todoAdapter.notifyDataSetChanged();
                scheduleAdapter.notifyDataSetChanged();
            }
        });

        todosViewModel.getTodosByDayLiveData().observe(getViewLifecycleOwner(), new Observer<HashMap<Integer, Todo>>() {
            @Override
            public void onChanged(HashMap<Integer, Todo> idTodoHashMap) {
                if(idTodoHashMap != null) {
                    for(Todo todo : idTodoHashMap.values()){
                        if(!todo.containsTodo(todoList)){
                            todoList.add(todo);
                            todoAdapter.setTodos(todoList, integerBookHashMap);
                        }
                    }
                    todoAdapter.setTodos(todoList, integerBookHashMap);
                } else {
                    todoAdapter.setTodos(todoList, integerBookHashMap);
                }
                todoAdapter.notifyDataSetChanged();
            }
        });

        scheduleViewModel.getSchedulesByDay().observe(getViewLifecycleOwner(), new Observer<HashMap<Integer, Schedule>>() {
            @Override
            public void onChanged(HashMap<Integer, Schedule> idScheduleHashMap) {
                if(idScheduleHashMap != null) {
                    scheduleList = new ArrayList<>(idScheduleHashMap.values());
                    scheduleAdapter.setSchedules(scheduleList, integerBookHashMap);
                } else {
                    scheduleList = new ArrayList<>();
                    scheduleAdapter.setSchedules(scheduleList, integerBookHashMap);
                }
                scheduleAdapter.notifyDataSetChanged();
            }
        });


    }


    private void updateTodoSchedule(HashMap<Integer, Book> idBookHashMap) {
        Citrus citrus = (Citrus)(getActivity().getApplication());
        String token = citrus.getToken();
        String accountId = citrus.getAccountId();
        int curBookId = citrus.getCurBookId();

        if (idBookHashMap != null) {
            if(curBookId != -1) {
                todoList = new ArrayList<>();
                integerBookHashMap = new HashMap<>();
                Book book = idBookHashMap.get(curBookId);
                integerBookHashMap.put(curBookId, book);
                todosViewModel.loadTodosByDay(accountId, curBookId, year, month, day, token);
                citrus.setCurBookId(-1);
            } else {
                todoList = new ArrayList<>();
                integerBookHashMap = new HashMap<>(idBookHashMap);
                for (Book book : integerBookHashMap.values()) {
                    todosViewModel.loadTodosByDay(accountId, book.getBookId(), year, month, day, token);
                }
            }
        }
        scheduleViewModel.updateSchedulesByDay(accountId, year, month, day, token);
    }



    @Override
    public void onStop() {
        super.onStop();
        booksViewModel.getBookLiveData().removeObservers(getViewLifecycleOwner());
    }


}

class MyTodoshelfAdapter extends RecyclerView.Adapter<MyTodoshelfAdapter.MyTodoViewHolder> {
    private List<Todo> todoList;
    private HashMap<Integer, Book> idBookHashMap;
    private TodosViewModel todosViewModel;
    private Citrus citrus;
    private String accountId;
    private String token;
    private Context context;



    MyTodoshelfAdapter(List<Todo> todos, HashMap<Integer, Book> idBookHashMap, TodosViewModel todosViewModel, Citrus citrus, Context context) {
        this.citrus = citrus;
        this.token = citrus.getToken();
        this.accountId = citrus.getAccountId();
        this.todoList = todos;
        this.todosViewModel = todosViewModel;
        if (idBookHashMap != null) {
            this.idBookHashMap = new HashMap<>(idBookHashMap);
        } else {
            this.idBookHashMap = new HashMap<>(); // 空のHashMapを作成
        }
        this.context = context;
        notifyDataSetChanged();
    }

    public void setTodos(List<Todo> todos ,HashMap<Integer, Book> idBookHashMap) {
        todoList = todos;
        if (idBookHashMap != null) {
            this.idBookHashMap = new HashMap<>(idBookHashMap);
        } else {
            this.idBookHashMap = new HashMap<>(); // 空のHashMapを作成
        }

        sortTodosById();
        notifyDataSetChanged();
    }

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

    @Override
    public void onBindViewHolder(@NonNull MyTodoViewHolder holder, int position) {
        Todo todoData = this.todoList.get(position);
        holder.todoButton.setText(todoData.getTitle());
        holder.todoCheckBox.setChecked(todoData.getCheck());
        Book book = idBookHashMap.get(todoData.getBookId());
        if(book != null) {
            int red = Integer.parseInt(book.getColor().substring(1, 3), 16);
            int green = Integer.parseInt(book.getColor().substring(3, 5), 16);
            int blue = Integer.parseInt(book.getColor().substring(5, 7), 16);
            holder.todoButton.setBackgroundColor(Color.rgb(red, green, blue));
            holder.todoButton.setTextColor(Color.rgb(255 - red, 255 - green, 255 - blue));
        }

        holder.todoButton.setOnClickListener(v -> {
            Activity activity = (Activity) context;
            ((MainActivity) activity).showFragment(new CreateTodoFragment(todoData, book));
            notifyDataSetChanged();
        });

        holder.todoCheckBox.setOnCheckedChangeListener((buttonView, isChecked) -> {
            // チェック状態が変更された時の処理を記述
            if (isChecked) {
                // チェックされた時の処理
                todosViewModel.setCheck(accountId, book.getBookId(), todoData.getYear(), todoData.getMonth(), todoData.getDay(), todoData.getTodoId(), true, token);
            } else {
                // チェックが外された時の処理
                todosViewModel.setCheck(accountId, book.getBookId(), todoData.getYear(), todoData.getMonth(), todoData.getDay(), todoData.getTodoId(), false, token);
            }
        });

    }

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

    private void sortTodosById() {
        Collections.sort(todoList, new Comparator<Todo>() {
            @Override
            public int compare(Todo todo1, Todo todo2) {
                int bookComparison = Integer.compare(todo1.getBookId(), todo2.getBookId());
                if (bookComparison != 0) {
                    return bookComparison; // bookIdでの比較
                }
                return Integer.compare(todo1.getTodoId(), todo2.getTodoId()); // 同じbookIdの場合、todoIdで比較
            }
        });
        notifyDataSetChanged(); // データ変更をアダプタに通知
    }


    static class MyTodoViewHolder extends RecyclerView.ViewHolder {
        Button todoButton;
        CheckBox todoCheckBox;
        public MyTodoViewHolder(@NonNull View itemView) {
            super(itemView);
            todoButton = itemView.findViewById(R.id.todo_button);
            todoCheckBox = itemView.findViewById(R.id.todo_checkBox);
        }
    }
}

class MyScheduleshelfAdapter extends RecyclerView.Adapter<MyScheduleshelfAdapter.MyScheduleViewHolder> {

    private List<Schedule> scheduleList;
    private HashMap<Integer, Book> idBookHashMap;

    MyScheduleshelfAdapter(List<Schedule> schedules, HashMap<Integer, Book> idBookHashMap) {
        this.scheduleList = schedules;
        if (idBookHashMap != null) {
            this.idBookHashMap = new HashMap<>(idBookHashMap);
        } else {
            this.idBookHashMap = new HashMap<>(); // 空のHashMapを作成
        }    }

    public void setSchedules(List<Schedule> schedules, HashMap<Integer, Book> idBookHashMap) {
        scheduleList = schedules;
        if (idBookHashMap != null) {
            this.idBookHashMap = new HashMap<>(idBookHashMap);
        } else {
            this.idBookHashMap = new HashMap<>(); // 空のHashMapを作成
        }
        sortScheduleByTime();
        notifyDataSetChanged();
    }

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

    @Override
    public void onBindViewHolder(@NonNull MyScheduleViewHolder holder, int position) {
        int red = 169;
        int green = 169;
        int blue = 169;
        Schedule scheduleData = this.scheduleList.get(position);
        holder.scheduleButton.setText(scheduleData.getTitle());
        holder.scheduleButton.setText(scheduleData.getTitle() + "\n" +  extractionTime(scheduleData.getStartTime()) + " ~ "  + extractionTime(scheduleData.getEndTime()));
        Book book = idBookHashMap.get(scheduleData.getBookId());
        if(book != null) {
            red = Integer.parseInt(book.getColor().substring(1, 3), 16);
            green = Integer.parseInt(book.getColor().substring(3, 5), 16);
            blue = Integer.parseInt(book.getColor().substring(5, 7), 16);
        }
        holder.scheduleButton.setBackgroundColor(Color.rgb(red, green, blue));
        holder.scheduleButton.setTextColor(Color.rgb(255 - red, 255 - green, 255 - blue));

    }

    private void sortScheduleByTime() {
        Collections.sort(scheduleList, new Comparator<Schedule>() {
            @Override
            public int compare(Schedule schedule1, Schedule schedule2) {
                long start = convertTimeInteger(schedule1.getStartTime());
                long end = convertTimeInteger(schedule2.getStartTime());
                return Long.compare(start, end);
            }
        });
        notifyDataSetChanged(); // データ変更をアダプタに通知
    }

    private static long convertTimeInteger(String scheduleTime) {
        try {
            // フォーマッタを定義
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm");

            // StringをLocalDateTimeに変換
            LocalDateTime dateTime = LocalDateTime.parse(scheduleTime, formatter);
            System.out.println(dateTime);

            // 年、月、日、時、分を抽出
            long year = dateTime.getYear();
            long month = dateTime.getMonthValue();
            long day = dateTime.getDayOfMonth();
            long hour = dateTime.getHour();
            long minute = dateTime.getMinute();
            System.out.println(year);

            // 必要に応じて整数を組み合わせる（例: YYYYMMDDHHMM）
            long result =  year *100000000 +month * 1000000 + day * 10000 + hour * 100 + minute;
            System.out.println(result);

            return result;
        } catch (DateTimeParseException e) {
            e.printStackTrace();
            return -1; // エラーが発生した場合は-1を返す
        }
    }

    private static String extractionTime(String scheduleTime) {
        return scheduleTime.substring(scheduleTime.length() - 5);
    }

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

    static class MyScheduleViewHolder extends RecyclerView.ViewHolder {
        Button scheduleButton;
        public MyScheduleViewHolder(@NonNull View itemView) {
            super(itemView);
            scheduleButton = itemView.findViewById(R.id.schedule_button);
        }
    }
}