package helpers

import (
	"bufio"
	"hoster/internals/types"
	"io/fs"
	"os"
	"regexp"
	"strconv"
	"strings"

	"github.com/gookit/goutil/fsutil"
)

func FindHostConfigs(path string) ([]types.Project, error) {
	projects := []types.Project{}

	fsutil.FindInDir(path, func(filePath string, de fs.DirEntry) error {
		project := types.Project{}
		parseHostFile(filePath, &project)

		if project.Domain != "" {
			projects = append(projects, project)
		}
		return nil
	})

	return projects, nil
}

var portRegex = regexp.MustCompile(`listen\s+(\d+)`)
var serverNameRegex = regexp.MustCompile(`server_name\s+(.+);`)

func parseHostFile(filePath string, project *types.Project) error {
	file, err := os.Open(filePath)
	if err != nil {
		return err
	}

	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := strings.TrimSpace(scanner.Text())

		if strings.HasPrefix(line, "#") {
			continue
		}

		if strings.HasPrefix(line, "listen ") {
			port := portRegex.FindStringSubmatch(line)
			project.InternalPort, err = strconv.Atoi(port[1])
			if err != nil {
				return err
			}
		}

		if strings.HasPrefix(line, "server_name ") {
			serverName := serverNameRegex.FindStringSubmatch(line)
			project.Domain = serverName[1]
		}
	}

	if err := scanner.Err(); err != nil {
		return err
	}

	return nil
}