/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Interface.java to edit this template
 */
package com.megatim.reporting.adhoc.util;

import com.megatim.reporting.adhoc.annotations.PrintColumn;
import com.megatim.reporting.adhoc.annotations.PrintList;
import com.megatim.reporting.adhoc.pojo.CustomField;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

/**
 *
 * @author ASUS
 */
public class PrintableColumnExtractor {

    private PrintableColumnExtractor() {
    }

    public static List<CustomField> extract(Class<?> clazz) {
        List<CustomField> customFields = new ArrayList<>();
        customFields.addAll(extractFromFields(clazz));
        customFields.addAll(extractFromMethods(clazz));
        List<CustomField> sortedFields = customFields.stream()
            .sorted(Comparator.comparingInt(CustomField::getRang))
            .collect(Collectors.toList());
        return sortedFields;
    }

    public static List<CustomField> extractListFields(Class<?> clazz, CustomField printableListField) {
        List<CustomField> customFields = new ArrayList<>();
        List<Field> fields = Arrays.asList(clazz.getDeclaredFields());
        fields.stream()
                .filter(f -> {
                    PrintList printList = f.getAnnotation(PrintList.class);
                    return printList != null && printList.titre().equals(printableListField.getLibelle());
                })
                .findFirst()
                .ifPresent(c -> {
                    PrintList printList = c.getAnnotation(PrintList.class);
                    customFields.addAll(extract(printList.classe()));
                });

        return customFields;
    }

    private static List<CustomField> extractFromFields(Class<?> clazz) {
        List<CustomField> customFields = new ArrayList<>();
        Field[] fields = clazz.getDeclaredFields();

        for (Field f : fields) {
            PrintColumn printColumn = f.getAnnotation(PrintColumn.class);
            PrintList printList = f.getAnnotation(PrintList.class);

            if (printColumn != null) {

                CustomField customField = new CustomField(printColumn.libelle(), f.getName());
                customField.setClasse(f.getType());
                customField.setRang(printColumn.rang());
                customField.setWidth(printColumn.width());

                customFields.add(customField);
            } else {
                if (printList != null
                        && (java.util.List.class.isAssignableFrom(f.getType()) || java.util.Set.class.isAssignableFrom(f.getType()))) {
                    CustomField customField = new CustomField(printList.titre(), f.getName());
                    customField.setClasse(f.getType());
                    customFields.add(customField);
                }
            }
        }

        return customFields;
    }

    private static List<CustomField> extractFromMethods(Class<?> clazz) {
        List<CustomField> customFields = new ArrayList<>();
        Method[] methods = clazz.getDeclaredMethods();

        for (Method m : methods) {
            PrintColumn printColumn = m.getAnnotation(PrintColumn.class);
            String fieldName = extractFieldNameFromMethod(m);

            if (printColumn != null && fieldName != null) {

                CustomField customField = new CustomField(printColumn.libelle(), fieldName);
                customField.setClasse(m.getReturnType());
                customField.setRang(printColumn.rang());

                customFields.add(customField);
            }
        }

        return customFields;
    }

    private static String extractFieldNameFromMethod(Method method) {
        String methodName = method.getName();

        if (methodName.length() > 4 && methodName.startsWith("get")
                && ((int) methodName.charAt(3) >= 65 && (int) methodName.charAt(3) <= 90)) {
            String firstChar = methodName.charAt(3) + "";

            return firstChar.toLowerCase() + methodName.substring(4);
        }
        return null;
    }
}