package gitcmd

import (
	"strings"
	"time"
)

type Tag struct {
	Name        string    `json:"name"`
	SHA         string    `json:"sha"`
	ShortSHA    string    `json:"short_sha"`
	Message     string    `json:"message"`
	Tagger      string    `json:"tagger"`
	TagDate     time.Time `json:"tag_date"`
	IsAnnotated bool      `json:"is_annotated"`
}

func (r *Repository) ListTags() ([]Tag, error) {

	out, _, err := NewCommand("for-each-ref").
		Add("--format=%(refname:short)%1f%(objectname)%1f%(subject)%1f%(taggername)%1f%(taggerdate:iso8601)%1f%(objecttype)").
		Add("refs/tags").
		WithDir(r.Path).
		RunStdString(r.ctx)
	if err != nil {
		return nil, err
	}

	var tags []Tag
	for _, line := range strings.Split(strings.TrimSpace(out), "\n") {
		if line == "" {
			continue
		}
		fields := strings.Split(line, "\x1f")
		if len(fields) < 6 {
			continue
		}
		sha := fields[1]
		shortSHA := sha
		if len(sha) >= 7 {
			shortSHA = sha[:7]
		}
		isAnnotated := fields[5] == "tag"
		var when time.Time
		if isAnnotated {
			when, _ = time.Parse("2006-01-02 15:04:05 -0700", fields[4])
		}
		tags = append(tags, Tag{
			Name:        fields[0],
			SHA:         sha,
			ShortSHA:    shortSHA,
			Message:     fields[2],
			Tagger:      fields[3],
			TagDate:     when,
			IsAnnotated: isAnnotated,
		})
	}
	return tags, nil
}