package repostatus

import (
	"errors"
	"strings"
	"time"
	"unicode/utf8"

	"io/ioutil"

	"go.wit.com/log"
)

func (rs *RepoStatus) GetCurrentBranchName() string {
	return rs.currentBranch.String()
}

func (rs *RepoStatus) GetCurrentBranchVersion() string {
	return rs.currentVersion.String()
}

func (rs *RepoStatus) LastTagAge() (time.Time, string) {
	return time.Now(), rs.lasttag.String()
}

func (rs *RepoStatus) GetLastTagVersion() string {
	return rs.lasttag.String()
}

// stores the current branch name
func (rs *RepoStatus) checkCurrentBranchName() string {
	currentname := rs.currentBranch.String()
	out := run(rs.realPath.String(), "git", "branch --show-current")
	if currentname == out {
		// nothing changed
		return currentname
	}
	rs.currentBranch.SetValue(out)
	if currentname == "" {
		return out // don't note if there was nothing before
	}
	rs.NoteChange("current branch has changed from " + currentname + " to " + out)
	return out
}

func (rs *RepoStatus) getCurrentBranchName() string {
	return rs.currentBranch.String()
}

func (rs *RepoStatus) gitDescribeByHash(hash string) (string, error) {
	if hash == "" {
		return "", errors.New("hash was blank")
	}
	err, out := rs.RunCmd([]string{"git", "describe", "--tags", "--always", hash})
	if err != nil {
		log.Warn("not in a git repo or bad hash?", err, rs.Path())
		return "", err
	}
	out = strings.TrimSpace(out)
	return out, err
}

func (rs *RepoStatus) gitDescribeByName(name string) (string, error) {
	name = strings.TrimSpace(name)

	if name == "" {
		// git will return the current tag
		err, out := rs.RunCmd([]string{"git", "describe", "--tags", "--always"})
		if err != nil {
			log.Warn("not in a git repo?", err, rs.Path())
			return "", err
		}
		out = strings.TrimSpace(out)
		return out, err
	}
	if !rs.LocalTagExists(name) {
		// tag does not exist
		return "", errors.New("git fatal: Not a valid object name")
	}
	cmd := []string{"git", "describe", "--tags", "--always", name}
	err, out := rs.RunCmd(cmd)
	if err != nil {
		log.Warn("cmd =", cmd)
		log.Warn("err =", err)
		log.Warn("not in a git repo or bad tag?", rs.Path())
		return "", err
	}
	out = strings.TrimSpace(out)
	return out, err
}

// todo: don't run git every time?
func (rs *RepoStatus) checkCurrentBranchVersion() string {
	out, _ := rs.gitDescribeByName("")
	log.Log(INFO, "checkCurrentBranchVersion()", out)
	rs.currentVersion.SetValue(out)
	return out
}

func (rs *RepoStatus) getCurrentBranchVersion() string {
	return rs.currentVersion.String()
}

// this should get the most recent tag
func (rs *RepoStatus) setLastTagVersion() {
	hash := run(rs.realPath.String(), "git", "rev-list --tags --max-count=1")
	log.Log(INFO, "getLastTagVersion()", hash)

	name, _ := rs.gitDescribeByHash(hash)
	rs.lasttag.SetText(name)
	return
}

func (rs *RepoStatus) populateTags() {
	tmp := rs.realPath.String() + "/.git/refs/tags"
	log.Log(INFO, "populateTags() path =", tmp)
	for _, tag := range listFiles(tmp) {
		if rs.tags[tag] == "" {
			log.Log(INFO, "populateTags() Adding new tag", tag)
			// rs.tagsDrop.AddText(tag)
			rs.tags[tag] = "origin"
		}
	}
	// rs.tagsDrop.SetText(rs.lasttagrev)
}

func (rs *RepoStatus) getBranches() []string {
	var all []string
	var heads []string
	var remotes []string
	heads = listFiles(rs.realPath.String() + "/.git/refs/heads")
	remotes = listFiles(rs.realPath.String() + "/.git/refs/remotes")

	all = heads

	all = append(all, remotes...)

	for _, branch := range all {
		log.Log(INFO, "getBranches()", branch)
	}
	return all
}

func (rs *RepoStatus) CheckDirty() bool {
	cmd := []string{"git", "status"}
	path := rs.realPath.String()
	err, b, out := RunCmd(path, cmd)
	if err != nil {
		log.Warn("CheckDirty() status b =", b)
		log.Warn("CheckDirty() status cmd =", cmd)
		log.Warn("CheckDirty() status path =", path)
		log.Warn("CheckDirty() status out =", out)
		log.Warn("CheckDirty() status err =", err)
		log.Error(err, "CheckDirty() git status error")
		rs.dirtyLabel.SetValue("error")
		return true
	}

	last := out[strings.LastIndex(out, "\n")+1:]

	if last == "nothing to commit, working tree clean" {
		log.Log(INFO, "CheckDirty() b =", b, "path =", path, "out =", out)
		log.Log(INFO, "CheckDirty() no", rs.realPath.String())
		rs.dirtyLabel.SetValue("no")
		return false
	}
	// sometimes b gets exit status 1 when there isn't anything that has changed
	// run git status fixes that for some reason.
	log.Log(INFO, "CheckDirty() is normal dirty", rs.realPath.String())
	log.Log(INFO, "CheckDirty() is normal cmd =", cmd)
	log.Log(INFO, "CheckDirty() is normal b =", b)
	log.Log(INFO, "CheckDirty() is normal path =", path)
	log.Log(INFO, "CheckDirty() is normal out =", out)
	log.Log(INFO, "CheckDirty() is normal err =", err)

	rs.dirtyLabel.SetValue("dirty")
	return true

}
func (rs *RepoStatus) CheckoutBranch(bname string) bool {
	if rs.CheckDirty() {
		log.Log(INFO, rs.realPath.String(), "is dirty")
		log.Info("bname is dirty", bname, rs.Path())
		return false
	}
	if !rs.TagExists(bname) {
		// tag does not exist
		log.Info("bname already exists", bname, rs.Path())
		return false
	}
	cName := rs.GetCurrentBranchName()
	if cName == bname {
		// already on branch
		return true
	}
	cmd := []string{"git", "checkout", bname}
	err, b, output := RunCmd(rs.realPath.String(), cmd)
	if err != nil {
		log.Log(INFO, err, b, output)
		return false
	}
	rs.checkCurrentBranchName()
	rs.checkCurrentBranchVersion()
	return true
}

func (rs *RepoStatus) CheckoutMaster() bool {
	if rs.CheckDirty() {
		log.Log(INFO, rs.realPath.String(), "is dirty")
		return false
	}
	mName := rs.GetMasterBranchName()
	cmd := []string{"git", "checkout", mName}
	err, b, output := RunCmd(rs.realPath.String(), cmd)
	if err != nil {
		log.Log(INFO, err, b, output)
	}

	realname := rs.getCurrentBranchName()
	realversion := rs.getCurrentBranchVersion()
	log.Log(INFO, rs.realPath.String(), "realname =", realname, "realversion =", realversion)

	if realname != mName {
		log.Log(INFO, "git checkout failed", rs.realPath.String(), mName, "!=", realname)
		return false
	}
	rs.masterBranchVersion.SetValue(realversion)
	return true
}

func (rs *RepoStatus) CheckoutDevel() bool {
	devel := rs.develWorkingName.String()
	// user := rs.userWorkingName.String()
	if devel == "" {
		return false
	}
	if rs.CheckDirty() {
		log.Log(INFO, rs.realPath.String(), "is dirty")
		return false
	}

	log.Log(INFO, "checkoutBranch", devel)
	rs.checkoutBranch("devel", devel)
	// log.Log(INFO, "checkoutBranch", user)
	// rs.checkoutBranch("user", user)
	return true
}

func (rs *RepoStatus) CheckoutUser() bool {
	bName := rs.GetUserBranchName()
	if bName == "" {
		return false
	}
	if rs.CheckDirty() {
		log.Log(INFO, rs.realPath.String(), "is dirty")
		return false
	}
	cmd := []string{"git", "checkout", bName}
	err, b, output := RunCmd(rs.realPath.String(), cmd)
	if err != nil {
		log.Log(INFO, err, b, output)
	}

	realname := rs.getCurrentBranchName()
	realversion := rs.getCurrentBranchVersion()
	log.Log(INFO, rs.realPath.String(), "realname =", realname, "realversion =", realversion)

	if realname != bName {
		log.Log(INFO, "git checkout failed", rs.realPath.String(), bName, "!=", realname)
		return false
	}
	rs.userBranchVersion.SetValue(realversion)
	return true
}

func (rs *RepoStatus) checkoutBranch(level string, branch string) {
	if rs.CheckDirty() {
		log.Log(INFO, "checkoutBranch() checkDirty() == true for repo", rs.realPath.String(), "looking for branch:", branch)
		return
	}
	out := run(rs.realPath.String(), "git", "checkout "+branch)
	log.Log(INFO, rs.realPath.String(), "git checkout "+branch, "returned", out)

	realname := rs.getCurrentBranchName()
	realversion := rs.getCurrentBranchVersion()
	log.Log(INFO, rs.realPath.String(), "realname =", realname, "realversion =", realversion)

	switch level {
	case "master":
		rs.masterBranchVersion.SetValue(realversion)
	case "devel":
		rs.develBranchVersion.SetValue(realversion)
	case "user":
		rs.userBranchVersion.SetValue(realversion)
	default:
	}
}

// attempt's to guess at what master is.
// TODO: fix this properly
func (rs *RepoStatus) setMainWorkingName(s string) {
	if rs == nil {
		log.Info("rs == nil", s)
		return
	}
	if rs.gitConfig == nil {
		log.Info("rs.gitConfig == nil", s)
		rs.mainWorkingName.SetValue(s)
		return
	}
	if rs.gitConfig.branches == nil {
		log.Info("rs.gitConfig.branches == nil", s)
		rs.mainWorkingName.SetValue(s)
		return
	}
	_, ok := rs.gitConfig.branches[s]
	if ok {
		// log.Info("git branch", s, "seems to exist")
		rs.mainWorkingName.SetValue(s)
		return
	}
	s = "guimaster"
	_, ok = rs.gitConfig.branches[s]
	if ok {
		// log.Info("git branch", s, "seems to exist")
		rs.mainWorkingName.SetValue(s)
		return
	}

	s = "master"
	_, ok = rs.gitConfig.branches[s]
	if ok {
		// log.Info("git branch", s, "seems to exist")
		rs.mainWorkingName.SetValue(s)
		return
	}

	s = "main"
	_, ok = rs.gitConfig.branches[s]
	if ok {
		// log.Info("git branch", s, "seems to exist")
		rs.mainWorkingName.SetValue(s)
		return
	}

	s = "TODO: read .git/config"
	log.Warn("git branch", s, "does not seem to exist. TODO: figure out the server default")
	for name, _ := range rs.gitConfig.branches {
		log.Warn("git branch found. use this?", name)
	}
	rs.mainWorkingName.SetValue(s)
}

func (rs *RepoStatus) setDevelWorkingName(s string) {
	rs.develWorkingName.SetValue(s)
	rs.develBranchVersion.SetLabel(s)
}

func (rs *RepoStatus) setUserWorkingName(s string) {
	rs.userWorkingName.SetValue(s)
	rs.userBranchVersion.SetLabel(s)
}

// returns "master", "devel", os.Username, etc
func (rs *RepoStatus) GetMasterBranchName() string {
	name := rs.mainWorkingName.String()
	return name
}
func (rs *RepoStatus) GetDevelBranchName() string {
	name := rs.develWorkingName.String()
	return name
}

func (rs *RepoStatus) GetUserBranchName() string {
	name := rs.userWorkingName.String()
	return name
}

// returns the git versions like "1.3-2-laksdjf" or whatever
func (rs *RepoStatus) GetMasterVersion() string {
	name := rs.masterBranchVersion.String()
	return name
}
func (rs *RepoStatus) GetDevelVersion() string {
	name := rs.develBranchVersion.String()
	return name
}
func (rs *RepoStatus) GetUserVersion() string {
	name := rs.userBranchVersion.String()
	return name
}

func (rs *RepoStatus) setMasterVersion(s string) {
	old := rs.GetMasterVersion()
	if old == s {
		return
	}
	rs.masterBranchVersion.SetValue(s)
	if old == "" {
		return // don't note if there was nothing before
	}
	rs.NoteChange("master branch has been changed from " + old + " to " + s)
}

func (rs *RepoStatus) setDevelVersion(s string) {
	old := rs.GetDevelVersion()
	if old == s {
		return
	}
	if old == "" {
		// don't note nothing
	} else {
		rs.NoteChange("devel branch has been changed from " + old + " to " + s)
	}
	rs.develBranchVersion.SetValue(s)
}

func (rs *RepoStatus) setUserVersion(s string) {
	old := rs.GetUserVersion()
	if old == s {
		return
	}
	if old == "" {
		// don't note nothing
	} else {
		rs.NoteChange("user branch has been changed from " + old + " to " + s)
	}
	rs.userBranchVersion.SetValue(s)
}

func (rs *RepoStatus) GetStatus() string {
	rs.changed = false
	if rs.CheckDirty() {
		log.Log(INFO, "CheckDirty() true")
		return "dirty"
	}
	if rs.userBranchVersion.String() != rs.develBranchVersion.String() {
		return "merge to devel"
	}
	if rs.develBranchVersion.String() != rs.masterBranchVersion.String() {
		return "merge to main"
	}
	if rs.lasttag.String() != rs.masterBranchVersion.String() {
		return "ready to tag version"
	}

	if rs.CheckBranches() {
		log.Log(INFO, "Branches are Perfect")
		return "PERFECT"
	}
	log.Log(INFO, rs.String(), "Branches are not Perfect")
	return "unknown branches"
}

// TODO: make this report the error somewhere
// This is supposed to check all the branches to make sure
// the are the same. that was originally what this was for
// now I think it's jsut probably dumb old code that doesn't
// need to be here

// actually, this is to attempt to verify absolutely everything
// is pushed upstream before doing a rm -rf ~/go/src
// TODO: revisit this code in the autotypist later
func (rs *RepoStatus) CheckBranches() bool {
	var hashCheck string
	var perfect bool = true
	all := rs.getBranches()
	path := rs.realPath.String() + "/.git/refs/"
	for _, b := range all {
		parts := strings.Split(b, "/")
		rdir := "heads"
		if len(parts) == 2 {
			rdir = "remotes"
		}
		fullfile := path + "/" + rdir + "/" + b

		// check if the ref name is "HEAD". if so, skip
		runeCount := utf8.RuneCountInString(fullfile)
		// Convert the string to a slice of runes
		runes := []rune(fullfile)
		// Slice the last 4 runes
		lastFour := runes[runeCount-4:]
		if string(lastFour) == "HEAD" {
			log.Log(INFO, "skip HEAD fullfile", fullfile)
			continue
		}

		content, _ := ioutil.ReadFile(fullfile)
		hash := strings.TrimSpace(string(content))
		if hashCheck == "" {
			hashCheck = hash
		}
		var cmd []string
		cmd = append(cmd, "git", "show", "-s", "--format=%ci", hash)
		err, output := rs.RunCmd(cmd)
		if err != nil {
			// log.Log(WARN, "cmd failed", cmd, "err =", err, "in", rs.String())
		}
		// git show -s --format=%ci <hash> will give you the time
		// log.Log(INFO, fullfile)
		if hash == hashCheck {
			log.Log(INFO, hash, output, b)
		} else {
			// log.Log(WARN, rs.String(), hash, output, b)
			// log.Log(WARN, "UNKNOWN BRANCHES IN THIS REPO", cmd)
			rs.versionCmdOutput.SetText("UNKNOWN BRANCHES")
			perfect = false
			// parts := strings.Split(b, "/")
			// log.Warn("git push", parts)
		}
	}
	return perfect
}