package gitpb

import (
	"errors"
	"path/filepath"
	"strings"

	"go.wit.com/lib/config"
	"go.wit.com/lib/env"
	"go.wit.com/log"
)

// loads what is on disk already. that is all
func (r *Repo) LoadRemote(remoteName string) (*Stats, error) {
	fullname := filepath.Join(r.FullPath, ".git", remoteName+".pb")
	stats := NewStats()
	stats.Filename = fullname
	err := config.ForceCreatePB(stats)
	return stats, err
}

var standardFmts []string = []string{"H", "T", "at", "ct", "f"}
var standardSeperator string = "___FORGE___"

func makeFmts() string {
	// fmts := strings.Fields(config.GetPanic("standardFmts"))
	// fmts := strings.Fields(config.GetPanic("standardSeperator"))
	var all []string
	for _, fmtvar := range standardFmts {
		all = append(all, "%"+fmtvar)
	}
	return "--format=" + strings.Join(all, standardSeperator)
}

// makes a new file. File must be empty at start
func (r *Repo) MakeRemote(remoteName string) (*Stats, error) {
	stats, err := r.LoadRemote(remoteName)
	if err != nil {
		return stats, err
	}
	if stats.Len() != 0 {
		return stats, errors.New("refs file was already created")
	}
	cmd := []string{"git", "log", "-n", "100", makeFmts(), "origin/HEAD"} // HEAD is _NOT_ always set
	if env.True("stats") {
		log.Info("STATS VERBOSE Run:", cmd)
	}
	cmdout := r.Run(cmd)
	if len(cmdout.Stdout) == 0 {
		return stats, errors.New("got nothing from git ls-remote")
	}
	var counter int
	for _, line := range cmdout.Stdout {
		line = strings.TrimSpace(line)
		parts := strings.Fields(line)
		if len(parts) != 2 {
			log.Printf("Repo: %s\n", r.FullPath)
			log.Printf("CMD: %v\n", cmd)
			log.Printf("LINE:%s\n", line)
			return stats, errors.New(line)
		}
		if env.True("stats") {
			log.Printf("LINE:%v %d %s\n", parts, counter, r.FullPath)
		}
		counter += 1
		newstat := new(Stat)
		newstat.Hash = parts[0]
		stats.Append(newstat)
	}
	if counter > 0 {
		stats.SaveByHash()
	}
	return stats, nil
}

// looks for new hashes. Run this after 'git fetch'
func (r *Repo) UpdateRemote(remoteName string) error {
	stats, err := r.LoadRemote(remoteName)
	if err != nil {
		return err
	}
	if stats.Len() == 0 {
		return errors.New("need to make file instead")
	}
	/*
		cmd := []string{"git", "ls-remote", remoteName} // must use 'master' as queried from the git server // GO has 250k remote refs
		if env.True("stats") {
			log.Info("STATS VERBOSE Run:", cmd)
		}
		cmdout := r.Run(cmd)
		if len(cmdout.Stdout) == 0 {
			return errors.New("got nothing back")
		}
		var ticker int
		var counter int
		var allnew []*Stat
		for _, line := range cmdout.Stdout {
			line = strings.TrimSpace(line)
			parts := strings.Fields(line)
			if len(parts) != 2 {
				log.Printf("Repo: %s\n", r.FullPath)
				log.Printf("CMD: %v\n", cmd)
				log.Printf("LINE:%s\n", line)
				return errors.New(line)
			}
			if env.True("stats") {
				log.Printf("LINE:%v %d %s\n", parts, ticker, r.FullPath)
			}
			// refpath := filepath.Join("refs/remote", remoteName)
			// if strings.HasPrefix(parts[1], refpath) {
			// this ref is not from the remote
			// 	continue
			// }
			counter += 1
			newstat := new(Stat)
			newstat.Hash = parts[0]
			n, found := slices.BinarySearchFunc(stats.Stats, newstat, func(a, b *Stat) int {
				return strings.Compare(a.Hash, b.Hash)
			})
			_ = n

			if found {
				// log.Info("found", n)
				continue
			}
			ticker += 1
			log.Info("not found", newstat)
			allnew = append(allnew, newstat)
		}
		if ticker > 0 {
			stats.Stats = append(stats.Stats, allnew...)
			stats.SaveByHash()
			return errors.New(fmt.Sprintf("len(%d), ticker(%d) counter(%d) refs changed", stats.Len(), ticker, counter))
		}
	*/
	return nil
}