package gitpb

import (
	"path/filepath"
	"sort"
	"time"

	"go.wit.com/log"
)

/*
// todo: probably switch to using slices. new things added in 1.23
// https://pkg.go.dev/slices

func (all *Stats) newSort() *StatScanner {
	slices.SortFunc(all.Stats, func(a, b *Stat) int {
		if n := strings.Compare(a.Name, b.Name); n != 0 {
			return n
		}
		// If names are equal, order by age
		return cmp.Compare(a.Age, b.Age)
	})
}
*/

// all this code below is junk and seamingly wrong

func (all *Stats) GetAge(name string) time.Time {
	packs := all.selectAllStats()

	var newest time.Time

	for _, tag := range packs {
		// log.Info("\t\ttag", i, tag.Name, tag.AuthorTime.AsTime())
		_, rname := filepath.Split(tag.Name)
		if name == rname {
			// log.Info("\t\tfound tag", i, rbase, rname, tag.AuthorTime.AsTime())
			newest = tag.AuthorTime.AsTime()
			return newest
		}
		newest = tag.AuthorTime.AsTime()
	}

	return newest
}

func (all *Stats) SortByAge() *StatScanner {
	packs := all.selectAllStats()

	sort.Sort(StatAge(packs))

	iterator := newStatScanner(packs)
	return iterator
}

type StatAge []*Stat

func (a StatAge) Len() int { return len(a) }

// sorts in ? order
func (a StatAge) Less(i, j int) bool {
	if time.Since(a[i].AuthorTime.AsTime()) < time.Since(a[j].AuthorTime.AsTime()) {
		return true
	}
	return false
}
func (a StatAge) Swap(i, j int) { a[i], a[j] = a[j], a[i] }

// biased code that gives out newer tag dates
// even if the code hasn't been patched
func (repo *Repo) NewestAge() time.Duration {
	alltags := repo.Tags.selectAllStats()

	var newest time.Time

	for _, tag := range alltags {
		// check the actual age of the patch
		if newest.Before(tag.AuthorTime.AsTime()) {
			newest = tag.AuthorTime.AsTime()
		}
		// check the age of the commit
		if newest.Before(tag.CommitTime.AsTime()) {
			newest = tag.CommitTime.AsTime()
		}
	}

	return time.Since(newest)
}

func (repo *Repo) NewestTime() time.Time {
	alltags := repo.Tags.selectAllStats()

	var newest time.Time

	for _, tag := range alltags {
		// check the actual age of the patch
		if newest.Before(tag.AuthorTime.AsTime()) {
			newest = tag.AuthorTime.AsTime()
		}
		// check the age of the commit
		if newest.Before(tag.CommitTime.AsTime()) {
			newest = tag.CommitTime.AsTime()
		}
	}

	return newest
}

func (repo *Repo) NewestAgeVerbose() time.Duration {
	alltags := repo.Tags.selectAllStats()

	var newest time.Time
	var cur time.Time

	for i, tag := range alltags {
		cur = tag.AuthorTime.AsTime()
		rbase, rname := filepath.Split(tag.Name)
		log.Info("\t\tfound tag", i, rbase, rname, tag.AuthorTime.AsTime(), tag.CommitTime.AsTime())
		if newest.Before(cur) {
			newest = cur
		}
	}

	return time.Since(newest)
}

// not really accurate. temprorary until git Config() parsing is better
func (repo *Repo) BranchAge(branch string) time.Duration {
	alltags := repo.Tags.selectAllStats()

	var newest time.Time
	var cur time.Time
	var auth time.Time

	for _, tag := range alltags {
		cur = tag.CommitTime.AsTime()
		auth = tag.AuthorTime.AsTime()
		if branch == filepath.Base(tag.Name) {
			// log.Info("\t\tfound tag", i, branch, tag.AuthorTime.AsTime(), tag.CommitTime.AsTime())
			if cur.Before(auth) {
				return time.Since(auth)
			}
			return time.Since(cur)
		}

		// check both dates I guess
		if newest.Before(auth) {
			newest = auth
		}
		if newest.Before(cur) {
			newest = cur
		}
	}

	return time.Since(newest)
}