package com.ssb.simplitend.medreminder;

import android.annotation.SuppressLint;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.content.res.AppCompatResources;
import androidx.fragment.app.Fragment;
import androidx.navigation.Navigation;

import com.ssb.simplitend.R;
import com.ssb.simplitend.apputils.AppUtil;
import com.ssb.simplitend.databinding.AddReminderFragmentBinding;
import com.ssb.simplitend.medreminder.mvvm.Reminder;
import com.ssb.simplitend.welcome.fragments.contacts.mvvm.Contact;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;

public class AddReminderFragment extends Fragment implements CompoundButton.OnCheckedChangeListener {

    // view binding
    protected AddReminderFragmentBinding binding;

    /*
        week day selection states
        true -> selected
        false -> un-selected
     */
    boolean[] week_state;

    // arguments keys
    public static final String REMINDER_KEY = "reminder_key";

    // model
    private Reminder reminder;

    public AddReminderFragment() {
        // required empty const.
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        binding = AddReminderFragmentBinding.inflate(inflater, container, false);

        initViews();

        clickEvents();

        return binding.getRoot();
    }

    private void clickEvents() {

        binding.getTime.setOnClickListener(v -> {
            AppUtil.closeKeyboard(requireActivity());
            getTime();
        });

        binding.getDate.setOnClickListener(v -> {
            AppUtil.closeKeyboard(requireActivity());
            getDate();
        });

        binding.addReminder.setOnClickListener(v -> {
            if (reminder == null){
                Navigation.findNavController(v).popBackStack(R.id.reminderFragment, false, true);
            }else{
                AppUtil.showSOSDecision(requireContext(), getString(R.string.make_changes),
                        getString(R.string.yes), getString(R.string.no),
                        v1 -> {
                            // yes click
                            AppUtil.showAnimateDBS(requireContext(),
                                    getString(R.string.changes_successful), R.raw.done_anim_primary,
                                    3000, v3 -> {
                                        // here v3 is null
                                        Navigation.findNavController(v).popBackStack(R.id.reminderFragment, false, true);
                                    });
                        }, v2 -> {
                            // no click
                        });
            }
        });

    }

    @SuppressLint("ClickableViewAccessibility")
    private void initViews() {

        // checking if intent to EDIT or ADD reminder
        Bundle bundle = getArguments();
        if (bundle != null) setLayoutDetails(reminder = (Reminder) bundle.getSerializable(REMINDER_KEY));

        // scrolling instruction edit text
        binding.instructions.setOnTouchListener((v, event) -> {
            if (binding.instructions.hasFocus()) {
                v.getParent().requestDisallowInterceptTouchEvent(true);
                if ((event.getAction() & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_SCROLL) {
                    v.getParent().requestDisallowInterceptTouchEvent(false);
                    return true;
                }
            }
            return false;
        });

        // load into spinner
        loadMedType();
        loadFrequency();

        setUpWeekSelection();

        binding.everydayCheck.setOnCheckedChangeListener(this);

    }

    private void setLayoutDetails(Reminder reminder){
        if (reminder != null){
            // intent is to edit the reminder
            binding.title.setText(getString(R.string.edit_reminder));
            binding.medicName.setText(reminder.dosage_name);
            binding.quantity.setText(reminder.quantity);
            binding.getTime.setText(reminder.time);
        }
    }

    // every-dau toggle listener
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        for (int i = 0; i < 7; i++) {
            setSelectionState(i, week_state[i] = isChecked);
        }
    }

    // set selection and un-selection of week day
    private void setUpWeekSelection() {

        week_state = new boolean[7];

        // week day selections
        binding.sun.setOnClickListener(v -> setSelectionState(0, week_state[0] = !week_state[0]));
        binding.mon.setOnClickListener(v -> setSelectionState(1, week_state[1] = !week_state[1]));
        binding.tue.setOnClickListener(v -> setSelectionState(2, week_state[2] = !week_state[2]));
        binding.wed.setOnClickListener(v -> setSelectionState(3, week_state[3] = !week_state[3]));
        binding.thu.setOnClickListener(v -> setSelectionState(4, week_state[4] = !week_state[4]));
        binding.fri.setOnClickListener(v -> setSelectionState(5, week_state[5] = !week_state[5]));
        binding.sat.setOnClickListener(v -> setSelectionState(6, week_state[6] = !week_state[6]));

    }

    private void setSelectionState(int position, boolean selection) {
        if (selection) {
            // selection has to be made
            switch (position) {
                case 0:
                    // sun
                    binding.sun.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.sun.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 1:
                    // mon
                    binding.mon.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.mon.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 2:
                    // tue
                    binding.tue.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.tue.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 3:
                    // wed
                    binding.wed.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.wed.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 4:
                    // thu
                    binding.thu.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.thu.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 5:
                    // fri
                    binding.fri.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.fri.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
                case 6:
                    // sat
                    binding.sat.setBackgroundTintList(AppCompatResources.getColorStateList(requireContext(), R.color.color_primary));
                    binding.sat.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.white_bg));
                    break;
            }
        } else {
            // un-selection has to be made
            switch (position) {
                case 0:
                    // sun
                    binding.sun.setBackgroundTintList(null);
                    binding.sun.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 1:
                    // mon
                    binding.mon.setBackgroundTintList(null);
                    binding.mon.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 2:
                    // tue
                    binding.tue.setBackgroundTintList(null);
                    binding.tue.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 3:
                    // wed
                    binding.wed.setBackgroundTintList(null);
                    binding.wed.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 4:
                    // thu
                    binding.thu.setBackgroundTintList(null);
                    binding.thu.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 5:
                    // fri
                    binding.fri.setBackgroundTintList(null);
                    binding.fri.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
                case 6:
                    // sat
                    binding.sat.setBackgroundTintList(null);
                    binding.sat.setTextColor(AppCompatResources.getColorStateList(requireContext(), R.color.black));
                    break;
            }
        }

        // checking if all days are selected or not
        // thus, updating the Everyday switch accordingly
        boolean isEveryDay = true;

        for (int i = 0; i < 7; i++) {
            if (!week_state[i]) {
                // some day is not selected thus not everyday selection
                isEveryDay = false;
                break;
            }
        }
        
        binding.everydayCheck.setOnCheckedChangeListener(null);
        binding.everydayCheck.setChecked(isEveryDay);
        binding.everydayCheck.setOnCheckedChangeListener(this);
    }

    // shows date picker to pick date and set to tv
    private void getDate() {

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
            DatePickerDialog dpd = new DatePickerDialog(requireContext());

            dpd.setOnDateSetListener((view, year, month, dayOfMonth) -> {

                Calendar cal = Calendar.getInstance();
                cal.set(Calendar.YEAR, year);
                cal.set(Calendar.MONTH, month);
                cal.set(Calendar.DAY_OF_MONTH, dayOfMonth);

                SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy", Locale.getDefault());

                String selected_time = sdf.format(cal.getTime());
                binding.getDate.setText(selected_time);

            });

            dpd.show();
        }

        // TODO: 05-07-2023 for lower version

    }

    // shows time picker to pick time and set to textview
    private void getTime() {

        Calendar calendar = Calendar.getInstance(Locale.getDefault());

        TimePickerDialog tpd = new TimePickerDialog(requireContext(),
                (TimePickerDialog.OnTimeSetListener) (view, hourOfDay, minute) -> {

                    Calendar cal = Calendar.getInstance();
                    cal.set(Calendar.HOUR_OF_DAY, hourOfDay);
                    cal.set(Calendar.MINUTE, minute);

                    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a", Locale.getDefault());

                    String selected_time = sdf.format(cal.getTime());
                    binding.getTime.setText(selected_time);

                }, calendar.getTime().getHours(), calendar.getTime().getMinutes(), false);

        tpd.show();

    }

    // loading freq. into its resp. spinner
    private void loadFrequency() {

        // static data
        ArrayList<String> medTypeList = new ArrayList<>();
        medTypeList.add("1 time, Daily");
        medTypeList.add("2 time, Daily");
        medTypeList.add("3 time, Daily");

        binding.frequencySpinner.setLifecycleOwner(this);

        binding.frequencySpinner.setItems(medTypeList);

        binding.frequencySpinner.setDismissWhenNotifiedItemSelected(true);

        binding.frequencySpinner.setIsFocusable(true);

    }

    // loads med types into its resp. apinner
    private void loadMedType() {

        // static data
        ArrayList<String> medTypeList = new ArrayList<>();
        medTypeList.add("Lorem ipsum");
        medTypeList.add("Lorem ipsum");
        medTypeList.add("Lorem ipsum");

        binding.medicationsSpinner.setLifecycleOwner(this);

        binding.medicationsSpinner.setItems(medTypeList);

        binding.medicationsSpinner.setDismissWhenNotifiedItemSelected(true);

        binding.medicationsSpinner.setIsFocusable(true);

    }
}