package repostatus

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

	"go.wit.com/lib/gadgets"
	"go.wit.com/lib/gui/shell"
	"go.wit.com/log"
)

var windowMap map[string]*RepoStatus

func init() {
	windowMap = make(map[string]*RepoStatus)
}

// deprecate this
func ListAllOld() {
	for path, rs := range windowMap {
		log.Warn(rs.GetMasterVersion(), path)
	}
}

// returns the object for the path
// deprecate this
func FindPathOld(path string) *RepoStatus {
	if windowMap[path] == nil {
		log.Log(INFO, "FindPath() not initialized yet", path)
		return nil
	}
	return windowMap[path]
}

// makes a window of the status of the repo
// don't worry, you can think of it like Sierpinski carpet
// it's doesn't need to be displayed so it'll work fine even in an embedded space
func New(path string) (*RepoStatus, error) {
	err, r := NewRepoStatusWindow(path)
	return r, err
}

func SetWorkPath(path string) {
	os.Setenv("REPO_WORK_PATH", path)
}

// guess the paths. returns
// realpath : the actual path on the filesystem
// goSrcPath : this could be ~/go/src, or where the go.work file is
// goPath : go.wit.com/lib/gui/repostatus (for example)
// true/false if the repo is a golang repo
func guessPaths(path string) (string, string, string, bool, error) {
	var realpath, goSrcDir string
	var isGoLang bool = false

	homeDir, err := os.UserHomeDir()
	if err != nil {
		log.Log(WARN, "Error getting home directory:", err)
		return path, realpath, goSrcDir, false, err
	}
	goSrcDir = filepath.Join(homeDir, "go/src")

	// allow arbitrary paths, otherwise, assume the repo is in ~/go/src
	// unless REPO_WORK_PATH was set. to over-ride ~/go/src
	// todo, look for go.work
	if os.Getenv("REPO_WORK_PATH") == "" {
		os.Setenv("REPO_WORK_PATH", goSrcDir)
	} else {
		goSrcDir = os.Getenv("REPO_WORK_PATH")
	}

	if strings.HasPrefix(path, "/") {
		realpath = path
	} else if strings.HasPrefix(path, "~") {
		tmp := strings.TrimPrefix(path, "~")
		realpath = filepath.Join(homeDir, tmp)
	} else {
		realpath = filepath.Join(goSrcDir, path)
		isGoLang = true
	}
	if !IsDirectory(realpath) {
		log.Log(REPOWARN, "directory doesn't exist", realpath)
		// directory doesn't exist. exit with nil and error nil
		return path, realpath, goSrcDir, false, errors.New(realpath + " does not exist")
	}

	clone(goSrcDir, path)
	filename := filepath.Join(realpath, ".git/config")

	_, err = os.Open(filename)
	if err != nil {
		// log.Log(WARN, "Error reading .git/config:", filename, err)
		// log.Log(WARN, "TODO: find .git/config in parent directory")
		return path, realpath, goSrcDir, false, err
	}
	return path, realpath, goSrcDir, isGoLang, nil
}

// attempt to git clone if the go path doesn't exist
func clone(wdir string, path string) {
	fullpath := filepath.Join(wdir, path)
	if IsDirectory(fullpath) {
		return
	}
	err := os.Chdir(wdir)
	if err != nil {
		return
	}

	base := filepath.Join(wdir, filepath.Dir(path))
	shell.RunPath(base, []string{"git", "clone", "http://" + path})
}

func NewRepoStatusWindow(path string) (error, *RepoStatus) {
	path, realpath, goSrcDir, isGoLang, err := guessPaths(path)
	if err != nil {
		return err, nil
	}

	if windowMap[path] == nil {
		log.Log(INFO, "NewRepoStatusWindow() adding new", path)
	} else {
		log.Warn("This already exists for path", path)
		log.Warn("should return windowMap[path] here")
		return nil, windowMap[path]
	}

	rs := &RepoStatus{
		ready: false,
	}

	rs.tags = make(map[string]string)
	rs.window = gadgets.RawBasicWindow("GO Repo Details " + path)
	rs.window.Horizontal()
	rs.window.Make()
	basebox := rs.window.Box()
	group := basebox.NewGroup("stuff")
	primarybox := group.Box()
	primarybox.Horizontal()
	box2 := group.Box()
	rs.ready = true
	rs.window.Custom = func() {
		rs.Hide()
		log.Warn("repostatus user closed the window()")
	}

	// display the status of the git repository
	rs.drawGitStatus(primarybox)

	// display the git branches and options
	rs.makeBranchesBox(primarybox)

	// show standard git commit and merge controls
	rs.drawGitCommands(primarybox)

	// save ~/go/src & the whole path strings
	rs.path.SetValue(path)
	rs.goSrcPath.SetValue(goSrcDir)
	rs.realPath.SetValue(realpath)

	// add all the tags
	rs.makeTagBox(box2)

	rs.readGitConfig()

	rs.readOnly.SetValue("true")
	// ignore everything else for now
	// todo: move this logic to cfgfile.go
	if strings.HasPrefix(path, "go.wit.com") {
		rs.readOnly.SetValue("false")
	}
	if strings.HasPrefix(path, "git.wit.org") {
		rs.readOnly.SetValue("false")
	}

	// tries 'master', 'main', etc.
	rs.guessMainWorkingName()
	// tries 'devel', etc
	rs.guessDevelWorkingName()
	// sets this to os.Username
	rs.setUserWorkingName()

	if isGoLang {
		rs.isGoLang.SetText("true")
		rs.goPath.SetText(path)
	}
	windowMap[path] = rs
	return nil, rs
}