package commands

import (
	"fmt"
	"os"
	"path/filepath"
	"slices"
	"strings"

	"gitea.codeblob.work/pk/hoster/internals/conf"
	"gitea.codeblob.work/pk/hoster/internals/helpers"
	"gitea.codeblob.work/pk/hoster/internals/templates"
	"gitea.codeblob.work/pk/hoster/internals/types"

	"github.com/gookit/goutil/fsutil"
	"github.com/gookit/goutil/sysutil/cmdr"
	"github.com/kataras/golog"
	"github.com/urfave/cli/v2"
)

func CmdNew(c *cli.Context) error {
	if os.Getuid() != 0 {
		golog.Fatalf("You need to run this command as root.")
	}

	name := strings.TrimSpace(c.String("name"))
	domain := strings.TrimSpace(c.String("domain"))
	customProjectPath := strings.TrimSpace(c.String("custom-path"))
	projectRoot := conf.App.MustString("projects.root")
	sitesAvail := conf.App.MustString("nginx.sitesAvailable")
	sitesEnabled := conf.App.MustString("nginx.sitesEnabled")
	nginxFile := filepath.Join(sitesAvail, name)

	projectFolder := filepath.Join(projectRoot, name)

	if customProjectPath != "" {
		projectFolder = customProjectPath
	}

	existingProjects, err := helpers.FindHostConfigs(sitesAvail)
	if err != nil {
		return err
	}

	usedPorts := []int{}
	for _, project := range existingProjects {
		usedPorts = append(usedPorts, project.InternalPort)
	}

	port := conf.App.Int("nginx.portRangeStart")
	freePort := 0
	for port <= conf.App.Int("nginx.portRangeEnd") {
		if !slices.Contains(usedPorts, port) && helpers.IsFreePort(port) {
			freePort = port
			break
		}
		port++
	}

	if freePort == 0 {
		return fmt.Errorf("no free port available")
	}

	if !fsutil.IsDir(projectFolder) {
		golog.Infof("Creating project folder '%s'", projectFolder)
		err := os.MkdirAll(projectFolder, 0755)
		if err != nil {
			return err
		}
	}

	if fsutil.IsFile(nginxFile) {
		return fmt.Errorf("the nginx config file '%s' already exists", nginxFile)
	}

	// Set owner and group of project folder
	err = os.Chown(projectFolder, conf.App.Int("projects.owner"), conf.App.Int("projects.group"))
	if err != nil {
		return err
	}

	project := types.Project{
		Name:         name,
		Domain:       domain,
		InternalPort: freePort,
	}

	// Create nginx config file
	err = templates.Execute("nginx", nginxFile, project)

	if err != nil {
		return err
	}

	// Symlink nginx config file
	err = os.Symlink(nginxFile, filepath.Join(sitesEnabled, name))
	if err != nil {
		return err
	}

	// Execute certbot command: "systemctl stop nginx && sudo certbot certonly --standalone --preferred-challenges http -d {domain} && sudo systemctl start nginx"

	com := cmdr.NewCmd("systemctl").
		WithArgs([]string{"stop", "nginx"})

	_, err = com.Output()
	if err != nil {
		return err
	}

	com = cmdr.NewCmd("certbot").
		WithArgs([]string{"certonly", "--standalone", "--preferred-challenges", "http", "-d", domain})
	_, err = com.Output()
	if err != nil {
		return err
	}

	com = cmdr.NewCmd("systemctl").
		WithArgs([]string{"start", "nginx"})
	_, err = com.Output()
	if err != nil {
		return err
	}

	golog.Infof("Project successfully '%s' created. Uses port %d.", name, freePort)

	return nil
}