package com.example.citrusclient.views;

import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
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.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;

import com.example.citrusclient.R;
import com.example.citrusclient.models.Schedule;
import com.example.citrusclient.viewmodels.ScheduleViewModel;
import com.google.android.material.floatingactionbutton.FloatingActionButton;

import java.io.ObjectInputStream;
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.YearMonth;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import android.view.ViewGroup.MarginLayoutParams;
import android.view.ViewGroup.LayoutParams;

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


    private TableLayout tableLayout;
    private TableRow[] tableRows = new TableRow[6];

    public CalendarFragment() {
        // 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 ScheduleFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static CalendarFragment newInstance(String param1, String param2) {
        CalendarFragment fragment = new CalendarFragment();
        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);
        }


    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_calendar, container, false);
    }

    private List<Schedule> scheduleList;
    ScheduleViewModel scheduleViewModel;

    int year;
    int month;

    public TextView[][] calendar(int firstDayOfWeek, int prevMonthDay, int lastDay) {
        int curDay = 1;
        int d = 1;
        int prevDay = prevMonthDay - firstDayOfWeek;
        TextView textViews[][] = new TextView[6][7];
        if(firstDayOfWeek == 7) firstDayOfWeek = 0;
        for(int i = 0; i < 6; i++) {
            for(int j = 0; j < 7; j++){
                if(firstDayOfWeek > 0) {
                    prevDay++;
                    textViews[i][j] = new TextView(requireContext());
                    textViews[i][j].setTextColor(Color.GRAY);
                    textViews[i][j].setText("" + prevDay);
                    firstDayOfWeek--;
                } else if(firstDayOfWeek <= 0 && curDay <= lastDay) {
                    textViews[i][j] = new TextView(requireContext());
                    textViews[i][j].setText("" + curDay);
                    curDay++;
                } else if (curDay > lastDay && d <= 43-curDay) {
                    textViews[i][j] = new TextView(requireContext());
                    textViews[i][j].setTextColor(Color.GRAY);
                    textViews[i][j].setText("" + d);
                    d++;
                }
            }
        }
        return textViews;
    }

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

        tableLayout =  view.findViewById(R.id.calendarlayout);
        Calendar calendar = Calendar.getInstance();
        year = calendar.get(Calendar.YEAR); //現在の年
        month = calendar.get(Calendar.MONTH) + 1; //現在の月

        //現在の月の最後の日付を取得
        YearMonth yearMonth = YearMonth.of(year, month);
        LocalDate CurLastDay = yearMonth.atEndOfMonth();
        int lastDay = CurLastDay.getDayOfMonth();

        //前の月の最後の日付を取得
        LocalDate lastDate = LocalDate.of(year, month, 1);
        LocalDate lastDayPrevMonth = lastDate.minusDays(1);
        int prevMonthDay = lastDayPrevMonth.getDayOfMonth();

        //指定した年月の一日の曜日を取得
        LocalDate firstDay = LocalDate.of(year, month, 1);
        DayOfWeek dayOfWeek = firstDay.getDayOfWeek();
        int firstDayOfWeek = dayOfWeek.getValue();

        Button nextMonth = view.findViewById(R.id.nextMonth);
        Button prevMonth = view.findViewById(R.id.prevMonth);
        FloatingActionButton createBook = view.findViewById(R.id.floatingActionButton);
        TextView curMonth = view.findViewById(R.id.month);
        curMonth.setText(year + "年" + "" + month + "月");

        createBook.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((MainActivity) getActivity()).showFragment(new CreateScheduleFragment());
            }
        });

        nextMonth.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                month++;
                if(month > 12){
                    month = 1;
                    year++;
                }
                curMonth.setText(year + "年" + "" + month + "月");
                //指定した年月の一日の曜日を取得
                LocalDate firstDay = LocalDate.of(year, month, 1);
                DayOfWeek dayOfWeek = firstDay.getDayOfWeek();
                int firstDayOfWeek = dayOfWeek.getValue();
                //前の月の最後の日付を取得
                LocalDate lastDate = LocalDate.of(year, month, 1);
                LocalDate lastDayPrevMonth = lastDate.minusDays(1);
                int prevMonthDay = lastDayPrevMonth.getDayOfMonth();
                //現在の月の最後の日付を取得
                YearMonth yearMonth = YearMonth.of(year, month);
                LocalDate CurLastDay = yearMonth.atEndOfMonth();
                int lastDay = CurLastDay.getDayOfMonth();

                TextView[][] days = calendar(firstDayOfWeek, prevMonthDay, lastDay);
                tableLayout.removeAllViews();
                for (int i = 0; i < 6; i++) {
                    tableRows[i] = new TableRow(requireContext());
                    tableLayout.addView(tableRows[i]);
                }
                for(int i = 0; i < 6; i++) {
                    for(int j = 0; j < 7; j++) {
                        LinearLayout layout = new LinearLayout(requireContext());
                        layout.setOrientation(LinearLayout.VERTICAL);
                        RecyclerView recyclerView = new RecyclerView(requireContext());
                        recyclerView.setLayoutManager(new LinearLayoutManager(view.getContext()));
                        recyclerView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
                        List<Schedule> schedules = new ArrayList<>();
                        schedules.add(new Schedule("abc", "3232", "yyyy", 0, 1));
                        schedules.add(new Schedule("123", "3232", "yyyy", 0, 2));
                        if(i==2&&j==1)schedules.add(new Schedule("cat", "3232", "yyyy", 0, 5));
                        recyclerView.setAdapter(new MyScheduleAdapter(schedules));
                        LinearLayout.LayoutParams p = (LinearLayout.LayoutParams) recyclerView.getLayoutParams();
                        p.weight = 1;
                        p.height = -1;
                        tableRows[i].setLayoutParams(p);

                        layout.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT));
                        TableRow.LayoutParams p2 = (TableRow.LayoutParams) layout.getLayoutParams();
                        p2.weight = 1;
                        layout.setLayoutParams(p2);


                        layout.addView(days[i][j]);
                        layout.addView(recyclerView);
                        tableRows[i].addView(layout);
                    }
                }
            }
        });

        prevMonth.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                month--;
                if(month < 1) {
                    month = 12;
                    year--;
                }
                curMonth.setText(year + "年" + "" + month + "月");
                //指定した年月の一日の曜日を取得
                LocalDate firstDay = LocalDate.of(year, month, 1);
                DayOfWeek dayOfWeek = firstDay.getDayOfWeek();
                int firstDayOfWeek = dayOfWeek.getValue();
                //前の月の最後の日付を取得
                LocalDate lastDate = LocalDate.of(year, month, 1);
                LocalDate lastDayPrevMonth = lastDate.minusDays(1);
                int prevMonthDay = lastDayPrevMonth.getDayOfMonth();
                //現在の月の最後の日付を取得
                YearMonth yearMonth = YearMonth.of(year, month);
                LocalDate CurLastDay = yearMonth.atEndOfMonth();
                int lastDay = CurLastDay.getDayOfMonth();

                TextView[][] days = calendar(firstDayOfWeek, prevMonthDay, lastDay);
                tableLayout.removeAllViews();
                for (int i = 0; i < 6; i++) {
                    tableRows[i] = new TableRow(requireContext());
                    tableLayout.addView(tableRows[i]);
                }
                for(int i = 0; i < 6; i++) {
                    for(int j = 0; j < 7; j++) {
                        LinearLayout layout = new LinearLayout(requireContext());
                        layout.setOrientation(LinearLayout.VERTICAL);
                        RecyclerView recyclerView = new RecyclerView(requireContext());
                        recyclerView.setLayoutManager(new LinearLayoutManager(view.getContext()));
                        recyclerView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
                        List<Schedule> schedules = new ArrayList<>();
                        schedules.add(new Schedule("abc", "3232", "yyyy", 0, 1));
                        schedules.add(new Schedule("123", "3232", "yyyy", 0, 2));
                        if(i==2&&j==1)schedules.add(new Schedule("cat", "3232", "yyyy", 0, 5));
                        recyclerView.setAdapter(new MyScheduleAdapter(schedules));
                        LinearLayout.LayoutParams p = (LinearLayout.LayoutParams) recyclerView.getLayoutParams();
                        p.weight = 1;
                        p.height = -1;
                        tableRows[i].setLayoutParams(p);

                        layout.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT));
                        TableRow.LayoutParams p2 = (TableRow.LayoutParams) layout.getLayoutParams();
                        p2.weight = 1;
                        layout.setLayoutParams(p2);


                        layout.addView(days[i][j]);
                        layout.addView(recyclerView);
                        tableRows[i].addView(layout);
                    }
                }
            }
        });

        TextView[][] days = calendar(firstDayOfWeek, prevMonthDay, lastDay);

        for(int i = 0; i < 6; i++) {
            tableRows[i] = (TableRow) tableLayout.getChildAt(i);

            for(int j = 0; j < 7; j++) {
                LinearLayout layout = new LinearLayout(requireContext());
                layout.setOrientation(LinearLayout.VERTICAL);


                RecyclerView recyclerView = new RecyclerView(requireContext());
                recyclerView.setLayoutManager(new LinearLayoutManager(view.getContext()));
                recyclerView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
                List<Schedule> schedules = new ArrayList<>();
                schedules.add(new Schedule("abc", "3232", "yyyy", 0, 1));
                schedules.add(new Schedule("123", "3232", "yyyy", 0, 2));
                recyclerView.setAdapter(new MyScheduleAdapter(schedules));
                LinearLayout.LayoutParams p = (LinearLayout.LayoutParams) recyclerView.getLayoutParams();
                p.weight = 1;

                layout.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT));
                TableRow.LayoutParams p2 = (TableRow.LayoutParams) layout.getLayoutParams();
                p2.weight = 1;
                layout.addView(days[i][j]);
                layout.addView(recyclerView);
                tableRows[i].addView(layout);
            }
        }
    }
}

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

    private List<Schedule> scheduleList;

    MyScheduleAdapter(List<Schedule> schedules) { this.scheduleList = schedules; }

    public void setSchedules(List<Schedule> schedules) {
        scheduleList = schedules;
        notifyDataSetChanged();
    }
    @NonNull
    @Override
    public MyScheduleViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.a_calendar_schedule, parent, false);
        return new MyScheduleViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MyScheduleViewHolder holder, int position) {
        Schedule scheduleData = this.scheduleList.get(position);
        holder.scheduleText.setText(scheduleData.getTitle());
    }

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

    static class MyScheduleViewHolder extends RecyclerView.ViewHolder {
        TextView scheduleText;
        public MyScheduleViewHolder(@NonNull View itemView) {
            super(itemView);
            scheduleText = itemView.findViewById(R.id.schedule_text);
        }
    }
}