package gitpb

import (
	"slices"
	"strings"
	"time"

	"go.wit.com/lib/gui/shell"
	"go.wit.com/log"
	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
)

// redo this. use go-git2 ?
func (repo *Repo) allCommits() error {
	return nil
}

/*
// this is dumb
func (repo *Repo) AllCommits() error {
	// tags := []string{"cd", "%(creatordate)", "%(*authordate)", "%(refname)", "%(subject)"}
	// format := strings.Join(tags, "_,,,_%")

	cmd := []string{"git", "log", "--format=%cd"}
	result := shell.PathRunQuiet(repo.FullPath, cmd)
	if result.Error != nil {
		log.Warn("git for-each-ref error:", result.Error)
		return result.Error
	}
	newest := strings.Join(result.Stdout, "\n")
	newest = strings.TrimSpace(newest)
	tmp := getGitDateStamp(newest)
	repo.Times.NewestCommit = timestamppb.New(tmp)
	return nil
}
*/

// reload the tags
func (repo *Repo) reloadGitTags() error {
	// todo: look for changes in the tags?
	repo.Tags = new(GitTags)

	tags := []string{"%(objectname)", "%(creatordate)", "%(*authordate)", "%(refname)", "%(subject)"}
	format := strings.Join(tags, "_,,,_")
	cmd := []string{"git", "for-each-ref", "--sort=taggerdate", "--format", format}
	// log.Info("RUNNING:", strings.Join(cmd, " "))
	result := shell.PathRunQuiet(repo.FullPath, cmd)
	if result.Error != nil {
		log.Warn("git for-each-ref error:", result.Error)
		return result.Error
	}

	lines := result.Stdout
	// reverse the git order
	slices.Reverse(lines)

	var refname string
	var hash string
	var subject string
	var ctime *timestamppb.Timestamp
	var atime *timestamppb.Timestamp
	var newest time.Time

	for i, line := range lines {
		var parts []string
		parts = make([]string, 0)
		parts = strings.Split(line, "_,,,_")
		if len(parts) != 5 {
			log.Info("tag error:", i, parts)
			continue
		}
		hash = parts[0]
		if parts[1] != "" {
			tmp := getGitDateStamp(parts[1])
			if newest.Before(tmp) {
				newest = tmp // track the newest time
			}
			ctime = timestamppb.New(tmp)
		}
		if parts[2] != "" {
			tmp := getGitDateStamp(parts[2])
			if newest.Before(tmp) {
				newest = tmp // track the newest time
			}
			atime = timestamppb.New(tmp)
		}
		refname = parts[3]
		subject = parts[4]

		newr := GitTag{
			Refname:     refname,
			Hash:        hash,
			Subject:     subject,
			Creatordate: ctime,
			Authordate:  atime,
		}

		repo.Tags.Append(&newr)
	}

	// GIT_COMMITTER_DATE="$(git log -1 --format=%cI)" \
	// GIT_AUTHOR_DATE="$(git log -1 --format=%aI)" \
	// git am --committer-date-is-author-date < patch.mbox

	// good format for insuring the hashs are identical when using git am
	// git log -1 --format="%H %aI %cI %an %ae %cn %ce"
	// also set the repo.NewestCommit

	/*
		cmd = []string{"git", "log", "-1", "--format=%cd"}
		result = shell.PathRunQuiet(repo.FullPath, cmd)
		if result.Error != nil {
			log.Warn("git for-each-ref error:", result.Error)
			return result.Error
		}
		newest := strings.Join(result.Stdout, "\n")
		newest = strings.TrimSpace(newest)
		tmp := getGitDateStamp(newest)
	*/
	repo.Times.NewestCommit = timestamppb.New(newest)
	return nil
}

// attempt to parse "2024-12-13 15:39:57 -0600"
func parseGitDate(dateString string) time.Time {
	// now := time.Now().Format("Wed Feb 7 10:13:38 2024 -0600")
	const gitLayout = "2006-01-02 15:04:05 -0600"
	tagTime, err := time.Parse(gitLayout, dateString)
	if err != nil {
		const gitLayout2 = "2006-01-02 15:04:05 +0600"
		tagTime, err = time.Parse(gitLayout2, dateString)
	}
	if err != nil {
		log.Warn("GOT THIS IN PARSE AAA." + dateString + ".AAA")
		log.Warn(err)
		return time.Now()
	}
	return tagTime
}

// attempt to parse strict ISO 8601 format // 2025-01-07T21:22:16-06:00
func parseDateRFC3339(dateString string) time.Time {
	tagTime, err := time.Parse(time.RFC3339, dateString)
	if err != nil {
		log.Warn("GOT THIS IN PARSE AAA." + dateString + ".AAA")
		log.Warn(err)
		return time.Now()
	}
	return tagTime
}

// converts a git for-each-ref date. "Wed Feb 7 10:13:38 2024 -0600"
func getGitDateStamp(gitdefault string) time.Time {
	// now := time.Now().Format("Wed Feb 7 10:13:38 2024 -0600")
	const gitLayout = "Mon Jan 2 15:04:05 2006 -0700"
	tagTime, err := time.Parse(gitLayout, gitdefault)
	if err != nil {
		log.Warn("GOT THIS IN PARSE AAA." + gitdefault + ".AAA")
		log.Warn(err)
		return time.Now()
	}
	return tagTime
}

func (tag *GitTag) GetAge() time.Duration {
	return time.Since(tag.GetAuthordate().AsTime())
}

func (repo *Repo) NewestTag() *GitTag {
	loop := repo.Tags.SortByAge()
	for loop.Scan() {
		r := loop.Next()
		return r
	}
	return nil
}