package toml

import (
	"reflect"
	"strings"

	"dove/utils/errors"
)

func Parse(target any) error {
	targetValue := reflect.ValueOf(target)
	if targetValue.Kind() != reflect.Pointer || targetValue.Elem().Kind() != reflect.Struct {
		return errors.Error(ParseTargetMustBeStructPtr)
	}

	ApplyDefaults(target)

	if loadedData == nil {
		return nil
	}

	sectionName := resolveSectionName(targetValue)
	sectionData, exists := loadedData[sectionName]
	if !exists {
		return nil
	}

	sectionBytes, marshalError := marshalSection(sectionData)
	if marshalError != nil {
		return errors.Error(ConfigSectionInvalid, sectionName)
	}

	return unmarshalContent(sectionBytes, target)
}

func resolveSectionName(targetValue reflect.Value) string {
	typeName := targetValue.Elem().Type().Name()
	return strings.ToLower(typeName)
}