package com.example.pap_teste;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import java.util.ArrayList;
import java.util.List;

public class GestaoStaffActivity extends AppCompatActivity {

    private final List<StaffAssignment> staffAssignments = new ArrayList<>();
    private ArrayAdapter<String> staffAdapter;
    private ListView listStaffMesas;
    private EditText inputNomeStaff;
    private Spinner spinnerMesaStaff;
    private TextView txtMensagemStaff;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_gestao_staff);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.gestaoStaffRoot), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });

        Button back = findViewById(R.id.btnVoltar);
        if (back != null) {
            back.setOnClickListener(v -> finish());
        }

        bindViews();
        setupMesaSpinner();
        setupList();
        setupFormActions();
    }

    private void bindViews() {
        listStaffMesas = findViewById(R.id.listStaffMesas);
        inputNomeStaff = findViewById(R.id.inputNomeStaff);
        spinnerMesaStaff = findViewById(R.id.spinnerMesaStaff);
        txtMensagemStaff = findViewById(R.id.txtMensagemStaff);
    }

    /**
     * Preenche o spinner com uma lista simples de mesas (1–20).
     * Mais tarde isto pode ser ligado às mesas reais configuradas em "Gerir Mesas".
     */
    private void setupMesaSpinner() {
        ArrayAdapter<String> mesaAdapter = new ArrayAdapter<>(
                this,
                android.R.layout.simple_spinner_dropdown_item
        );

        for (int i = 1; i <= 20; i++) {
            mesaAdapter.add(String.format("Mesa %02d", i));
        }

        spinnerMesaStaff.setAdapter(mesaAdapter);
    }

    private void setupList() {
        staffAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_activated_1);
        listStaffMesas.setAdapter(staffAdapter);
        refreshList();

        listStaffMesas.setOnItemClickListener((parent, view, position, id) -> {
            StaffAssignment item = staffAssignments.get(position);
            inputNomeStaff.setText(item.nome);
            int index = Math.max(0, Math.min(spinnerMesaStaff.getCount() - 1, item.mesaNumero - 1));
            spinnerMesaStaff.setSelection(index);
            txtMensagemStaff.setText(String.format("A editar: %s (Mesa %02d)", item.nome, item.mesaNumero));
        });
    }

    private void setupFormActions() {
        Button btnAtribuir = findViewById(R.id.btnAtribuirStaff);
        if (btnAtribuir != null) {
            btnAtribuir.setOnClickListener(v -> guardarAtribuicao());
        }
    }

    private void guardarAtribuicao() {
        String nome = inputNomeStaff != null ? inputNomeStaff.getText().toString().trim() : "";
        if (nome.isEmpty()) {
            Toast.makeText(this, "Indique o nome do funcionário.", Toast.LENGTH_SHORT).show();
            return;
        }

        if (spinnerMesaStaff == null || spinnerMesaStaff.getSelectedItem() == null) {
            Toast.makeText(this, "Selecione uma mesa.", Toast.LENGTH_SHORT).show();
            return;
        }

        int mesaNumero = spinnerMesaStaff.getSelectedItemPosition() + 1;

        StaffAssignment existente = findByNome(nome);
        if (existente == null) {
            staffAssignments.add(new StaffAssignment(nome, mesaNumero));
            txtMensagemStaff.setText(String.format("%s atribuído à mesa %02d.", nome, mesaNumero));
        } else {
            existente.mesaNumero = mesaNumero;
            txtMensagemStaff.setText(String.format("Mesa de %s atualizada para %02d.", nome, mesaNumero));
        }

        refreshList();
    }

    private StaffAssignment findByNome(String nome) {
        for (StaffAssignment item : staffAssignments) {
            if (item.nome.equalsIgnoreCase(nome)) {
                return item;
            }
        }
        return null;
    }

    private void refreshList() {
        if (staffAdapter == null) return;

        staffAdapter.clear();
        for (StaffAssignment item : staffAssignments) {
            String resumo = String.format("%s  •  Mesa %02d", item.nome, item.mesaNumero);
            staffAdapter.add(resumo);
        }
        staffAdapter.notifyDataSetChanged();
    }

    private static class StaffAssignment {
        String nome;
        int mesaNumero;

        StaffAssignment(String nome, int mesaNumero) {
            this.nome = nome;
            this.mesaNumero = mesaNumero;
        }
    }
}