package repostatus

import (
	"errors"
	"path/filepath"
	"regexp"
	"strings"
	"sync"
	"time"

	"go.wit.com/gui"
	"go.wit.com/log"
)

type Tag struct {
	// tracks if the tag is displayed
	hidden bool

	// the tag "v0.1.3"
	tag *gui.Node

	// the .git/ref hash
	ref *gui.Node

	// the .git/ref date
	date     *gui.Node
	duration *gui.Node

	// the tag comment
	subject *gui.Node

	// a button to delete the tag
	deleteB *gui.Node
}

// a GUI box of all the tags in a repo
type GitTagBox struct {
	// the box to list all the tags in
	box   *gui.Node
	group *gui.Node
	grid  *gui.Node

	// all the tags
	tags []*Tag
}

func (rs *RepoStatus) makeTagBox(box *gui.Node) error {
	if rs.Tags != nil {
		log.Log(WARN, "already scanned tags")
		return errors.New("already scanned tags")
	}
	tagB := new(GitTagBox)
	rs.Tags = tagB
	tagB.group = box.NewGroup(".git tags for " + rs.String())

	//	tagB.group.NewButton("prune tags", func() {
	//		tagB.Prune()
	//	})
	var dups *gui.Node

	dups = tagB.group.NewCheckbox("Show duplicate tags").SetChecked(false)
	dups.Custom = func() {
		if dups.Checked() {
			tagB.Prune()
		} else {
			for _, t := range tagB.tags {
				t.Show()
			}
		}
	}
	tagB.group.NewButton("delete all", func() {
		for i, t := range tagB.tags {
			if t.hidden {
				// log.Info("tag is hidden", i, t.tag.String())
				continue
			}
			log.Info("tag is shown", i, t.tag.String())
			rs.DeleteTag(t)
		}
	})

	grid := tagB.group.NewGrid("tags", 0, 0)
	tagB.grid = grid

	grid.NewLabel("version")
	grid.NewLabel("ref")
	grid.NewLabel("date")
	grid.NewLabel("release subject")
	grid.NextRow() // works like a typerwriter newline

	loop := rs.pb.Tags.SortByAge()
	for loop.Scan() {
		tag := loop.Next()

		rTag := new(Tag)
		rTag.tag = grid.NewLabel(tag.GetRefname())
		rTag.ref = grid.NewEntrybox(tag.GetHash())

		ctime := tag.GetAuthordate().AsTime()
		dur := getDurationStamp(ctime)
		rTag.date = grid.NewLabel(ctime.Format("YYYY/MM/DD"))
		rTag.duration = grid.NewLabel(dur)

		rTag.subject = grid.NewLabel(tag.GetSubject())
		rTag.deleteB = grid.NewButton("delete", func() {
			tagversion := tag.GetRefname()
			log.Info("remove tag", tagversion)
			var all [][]string
			all = append(all, []string{"git", "tag", "--delete", tagversion})
			all = append(all, []string{"git", "push", "--delete", "origin", tagversion})

			if rs.DoAll(all) {
				log.Info("TAG DELETED", rs.String(), tagversion)
			} else {
				log.Info("TAG DELETE FAILED", rs.String(), tagversion)
			}
		})

		tagB.tags = append(tagB.tags, rTag)
		// works like a typerwriter
		grid.NextRow()
	}
	return nil
}

func (rtags *GitTagBox) ListAll() []*Tag {
	var tags []*Tag
	for _, t := range rtags.tags {
		tags = append(tags, t)
	}
	return tags
}

func (rtags *GitTagBox) List() []*Tag {
	var tags []*Tag
	for _, t := range rtags.tags {
		if t.hidden {
			// log.Info("tag is hidden", i, t.tag.String())
			continue
		}
		// log.Info("tag is shown", t.tag.String(), rtags.rs.String())
		tags = append(tags, t)
	}
	return tags
}

func (rtags *GitTagBox) Prune() {
	dups := make(map[string]*Tag)
	for i, t := range rtags.tags {
		if t == nil {
			log.Info("tag empty:", i)
			continue
		}
		ref := t.ref.String()
		_, ok := dups[ref]
		if ok {
			log.Info("tag is duplicate:", i, t.tag.String())
		} else {
			log.Info("new tag", i, t.tag.String())
			dups[ref] = t
			t.Hide()
		}

	}
}

// hide tags worth keeping
func (rtags *GitTagBox) PruneSmart() {
	// always keep the first tag
	var first bool = true

	dups := make(map[string]*Tag)
	for i, t := range rtags.tags {
		if t == nil {
			log.Info("tag empty:", i)
			continue
		}

		// check for duplicate tags
		ref := t.ref.String()
		_, ok := dups[ref]
		if ok {
			log.Info("tag is duplicate:", i, t.tag.String())
			continue
		}
		dups[ref] = t

		// dump any tags that don't start with 'v'
		//if !strings.HasPrefix(t.tag.String(), "v") {
		//	log.Info("tag does not start with v", i, t.tag.String())
		//	continue
		//}

		isVersion := regexp.MustCompile("v[0-9]+.[0-9]+.[0-9]+").MatchString
		if isVersion(t.tag.String()) {
			if first {
				log.Info("keep first tag", i, t.tag.String())
				t.Hide()
				first = false
				continue
			}
			log.Info("valid tag", i, t.tag.String())
			t.Hide()
			continue
		}

		if first {
			log.Info("keep first tag", i, t.tag.String())
			t.Hide()
			first = false
			continue
		}

		log.Info("keep tag", i, t.tag.String())
	}
}

// deleting it locally triggers some but when
// the git server was uncontactable (over IPv6 if that matters, probably it doesn't)
// and then the local delete re-added it into the tag
func (rs *RepoStatus) DeleteTag(rt *Tag) {
	cmd := []string{"git", "push", "--delete", "origin", rt.tag.String()}
	log.Info("RUN:", cmd)
	r := rs.Run(cmd)
	output := strings.Join(r.Stdout, "\n")
	if r.Error != nil {
		log.Info("cmd failed", r.Error)
		log.Info("output:", output)
	}
	log.Info("output:", output)

	cmd = []string{"git", "tag", "--delete", rt.tag.String()}
	log.Info("RUN:", cmd)
	r = rs.Run(cmd)
	output = strings.Join(r.Stdout, "\n")
	if r.Error != nil {
		log.Info("cmd failed", r.Error)
		log.Info("output:", output)
	}
	log.Info("output:", output)

}

func (rt *Tag) TagString() string {
	return rt.tag.String()
}

func (rt *Tag) Hide() {
	rt.hidden = true
	rt.tag.Hide()
	rt.ref.Hide()
	rt.date.Hide()
	rt.duration.Hide()
	rt.subject.Hide()
	rt.deleteB.Hide()
}

func (rt *Tag) Show() {
	rt.hidden = false
	rt.tag.Show()
	rt.ref.Show()
	rt.date.Show()
	rt.duration.Show()
	rt.subject.Show()
	rt.deleteB.Show()
}

func (rs *RepoStatus) TagExists(findname string) bool {
	allTags := rs.Tags.ListAll()
	for _, t := range allTags {
		tagname := t.TagString()
		_, filename := filepath.Split(tagname)
		if filename == findname {
			// log.Info("found tag:", path, filename, "from", rs.Path())
			return true
		}
	}
	return false
}

func (rs *RepoStatus) LocalTagExists(findname string) bool {
	allTags := rs.Tags.ListAll()
	for _, t := range allTags {
		tagname := t.TagString()
		if strings.HasPrefix(tagname, "refs/remotes") {
			continue
		}
		path, filename := filepath.Split(tagname)
		log.Log(INFO, "tag:", path, filename, "from", rs.Path())
		if filename == findname {
			log.Log(INFO, "found tag:", path, filename, "from", rs.Path())
			return true
		}
	}
	return false
}

// returns true if 'taggy' is _ONLY_ a local tag
// this means you can not do a git pull or git push on it
func (rs *RepoStatus) IsOnlyLocalTag(taggy string) bool {
	// first make sure the tag is actually even local
	if !rs.LocalTagExists(taggy) {
		// this means it's not even local now.
		return false
	}
	// okay, taggy exists, does it exist in a remote repo?
	for _, t := range rs.Tags.ListAll() {
		tagname := t.TagString()
		if strings.HasPrefix(tagname, "refs/remotes") {
			path, filename := filepath.Split(tagname)
			if filename == taggy {
				log.Log(REPOWARN, "found tag:", path, filename, "from", rs.Path())
				return false
			}
		}
	}
	// we couldn't find the local tag anywhere remote, so it's probably only local
	return true
}

func (t *Tag) Age() time.Duration {
	const gitLayout = "Mon Jan 2 15:04:05 2006 -0700"
	tagTime, _ := time.Parse(gitLayout, t.date.String())
	return time.Since(tagTime)
}

func (t *Tag) Name() string {
	return t.tag.String()
}

func (t *Tag) GetDate() (time.Time, error) {
	const gitLayout = "Mon Jan 2 15:04:05 2006 -0700"
	tagTime, err := time.Parse(gitLayout, t.date.String())

	if err != nil {
		log.Log(REPOWARN, "tag date err", t.ref.String(), t.tag.String(), err)
		return time.Now(), err
	}
	return tagTime, nil
}

func (rs *RepoStatus) NewestTag() *Tag {
	var newest *Tag
	var newestTime time.Time
	var tagTime time.Time
	var err error
	var allTags []*Tag
	var mu sync.Mutex

	allTags = make([]*Tag, 0, 0)
	junk := rs.Tags.ListAll()
	allTags = append(allTags, junk...)
	for _, t := range allTags {
		mu.Lock()
		if tagTime, err = t.GetDate(); err != nil {
			mu.Unlock()
			continue
		}

		// log.Log(REPOWARN, "tag", t.ref.String(), t.date.String(), t.tag.String())
		// if this is the first tag, use it
		if newest == nil {
			newestTime = tagTime
			newest = t
		}

		// if the tag date is after the newest date, it's newer so use this tag
		if tagTime.After(newestTime) {
			newestTime = tagTime
			newest = t
		}
		mu.Unlock()
	}
	return newest
}

func (rs *RepoStatus) DumpTags() {
	for _, t := range rs.Tags.ListAll() {
		log.Log(REPOWARN, "tag", t.ref.String(), t.date.String(), t.tag.String())
	}
}