package gui

import (
	"os"
	"path/filepath"
	"sort"
	"strings"

	"github.com/jesseduffield/lazygit/pkg/commands/models"
	"github.com/sirupsen/logrus"
)

func GetTreeFromStatusFiles(files []*models.File, log *logrus.Entry) *models.StatusLineNode {
	root := &models.StatusLineNode{}

	var curr *models.StatusLineNode
	for _, file := range files {
		split := strings.Split(file.Name, string(os.PathSeparator))
		curr = root
	outer:
		for i := range split {
			var setFile *models.File
			isFile := i == len(split)-1
			if isFile {
				setFile = file
			}

			path := filepath.Join(split[:i+1]...)

			for _, existingChild := range curr.Children {
				if existingChild.Path == path {
					curr = existingChild
					continue outer
				}
			}

			newChild := &models.StatusLineNode{
				Path: path,
				File: setFile,
			}
			curr.Children = append(curr.Children, newChild)

			curr = newChild
		}
	}

	root.Sort()
	root.Compress()

	return root
}

func GetFlatTreeFromStatusFiles(files []*models.File) *models.StatusLineNode {
	root := &models.StatusLineNode{}
	for _, file := range files {
		root.Children = append(root.Children, &models.StatusLineNode{
			Path: file.GetPath(),
			File: file,
		})
	}

	root.Sort()

	// Move merge conflicts to top. This is the one way in which sorting
	// differs between flat mode and tree mode
	sort.SliceStable(root.Children, func(i, j int) bool {
		return root.Children[i].File != nil && root.Children[i].File.HasMergeConflicts && !(root.Children[j].File != nil && root.Children[j].File.HasMergeConflicts)
	})

	return root
}