package history

import (
	"encoding/xml"
	"errors"
	"os"
	"strings"
)

// ReadFileAndConvertToHistory reads a file and converts it to the NML struct
func ReadFileAndConvertToHistory(filePath string) (*NML, error) {
	// Read the file content
	fileContent, err := os.ReadFile(filePath)
	if err != nil {
		return nil, err
	}

	// Unmarshal the XML content into the NML struct
	var nml NML
	err = xml.Unmarshal(fileContent, &nml)
	if err != nil {
		return nil, err
	}

	// Check if the file is a history file based on the content
	if IsHistoryFile(filePath) {
		return &nml, nil
	}

	return nil, errors.New("file is not a history file")
}

func HistoryFromString(content string) (*NML, error) {
	// Unmarshal the XML content into the NML struct
	var nml NML
	err := xml.Unmarshal([]byte(content), &nml)
	if err != nil {
		return nil, err
	}

	// Check if the file is a history file based on the content
	if IsHistoryString(content) {
		return &nml, nil
	}

	return nil, errors.New("file is not a history file")
}

func IsHistoryFile(path string) bool {
	content, err := os.ReadFile(path)
	if err != nil {
		return false
	}
	return strings.Contains(string(content), "HistoryData")
}

func IsHistoryString(content string) bool {
	return strings.Contains(content, "HistoryData")
}

func SaveHistoryToFile(history *NML, filePath string) error {
	// Marshal the NML struct into XML content
	content, err := xml.MarshalIndent(history, "", "    ")
	if err != nil {
		return err
	}

	// Write the XML content to the file
	err = os.WriteFile(filePath, content, 0644)
	if err != nil {
		return err
	}

	return nil
}