package main

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"time"

	"go.wit.com/lib/gui/shell"
	"go.wit.com/lib/protobuf/gitpb"
	"go.wit.com/log"
)

func forceReleaseVersion(repo *gitpb.Repo) {
	if argv.Minor {
		// if v1.2.3 change to v.1.3.0
		repo.IncrementTargetMinor()
	} else {
		// if v1.2.3 change to v.1.2.4
		repo.IncrementTargetRevision()
	}
}

func checkpkgcache(repo *gitpb.Repo) error {
	homedir, err := os.UserHomeDir()
	if err != nil {
		return err
	}
	rver := repo.GetLastTag()
	if rver == "" {
		return errors.New("could not get master version")
	}
	moddir := filepath.Join(homedir, "go/pkg/mod", repo.GetGoPath()+"@"+rver)
	if shell.IsDir(moddir) {
		return nil
	}

	getpath := repo.GetGoPath() + "@" + repo.GetLastTag()
	log.Info("MISSING:", getpath)
	_, err = me.startRepo.RunVerboseOnError([]string{"go", "get", getpath})
	return err
}

var rillcount int

func rillPurge(repo *gitpb.Repo) error {
	if me.forge.Config.IsReadOnly(repo.GetGoPath()) {
		return nil
	}
	if me.forge.Config.IsPrivate(repo.GetGoPath()) {
		return nil
	}

	_, err := repo.RunQuiet([]string{"go-mod-clean", "--purge"})
	rillcount += 1
	if err != nil {
		log.Info("go-mod-clean --smart failed", repo.GetGoPath(), err)
		return err
	}
	return nil
}

func rillRestore(repo *gitpb.Repo) error {
	if me.forge.Config.IsReadOnly(repo.GetGoPath()) {
		return nil
	}
	if me.forge.Config.IsPrivate(repo.GetGoPath()) {
		return nil
	}

	_, err := repo.RunQuiet([]string{"go-mod-clean", "--smart"})
	rillcount += 1
	if err != nil {
		log.Info("go-mod-clean --smart failed", repo.GetGoPath(), err)
		return err
	}
	return nil
}

func rePrepareRelease() {
	// reload the config
	// me.forge = forgepb.Init()
	me.found = new(gitpb.Repos)

	log.Printf("rePrepareRelease() START rill go-mod-clean --smart (11 seconds?)")
	rillcount = 0
	now := time.Now()
	me.forge.RillFuncError(rillRestore)
	log.Printf("showRestore() (%d total repos) took:%s\n", rillcount, shell.FormatDuration(time.Since(now)))
	log.Sleep(1)
	all2 := me.forge.Repos.SortByFullPath()
	for all2.Scan() {
		check := all2.Next()
		if me.forge.Config.IsReadOnly(check.GetGoPath()) {
			continue
		}
		if me.forge.Config.IsPrivate(check.GetGoPath()) {
			continue
		}
		// this should be rare? nonexistant?
		if err := checkpkgcache(check); err != nil {
			log.Info("go get checks failed here.", err, check.GetGoPath())
		}
	}

	all := me.forge.Repos.SortByFullPath()
	for all.Scan() {
		check := all.Next()

		if alreadyDone(check) {
			// means it was already published
			// protects against logic errors that might result
			// in an infinite loop
			log.Info("WARNING alreadyDone rePrepareRelease()", check.GetGoPath())
			continue
		}

		if me.forge.Config.IsReadOnly(check.GetGoPath()) {
			// can't release readonly repos
			continue
		}

		if !me.forge.Config.IsPrivate(check.GetGoPath()) {
			if err := checkPublishedGodeps(check); err != nil {
				// this means the published godeps are no longer up to date
				forceReleaseVersion(check)
				me.found.AppendByGoPath(check)
				log.Info("checkPublishedGodeps failed with err", check.GetGoPath(), err)
				continue
			} else {
				// log.Info("checkPublishedGodeps is ok", check.GetGoPath())
			}
		}

		// if master != lastTag, always increment
		master := check.GetMasterVersion()
		lastTag := check.GetLastTag()
		if master != lastTag {
			newmhash := check.GetTagHash(master)
			oldlhash := check.GetTagHash(lastTag)
			if newmhash == oldlhash {
				// they are actually equal
				continue
			}
			b1 := check.CountDiffObjects(oldlhash, newmhash)
			b2 := check.CountDiffObjects(newmhash, oldlhash)
			if b1 != 0 {
				log.Printf("HASH ERROR       %-50s tag %s  < %s\n", check.GetGoPath(), newmhash, oldlhash)
				log.Info("old vs new count", b1, b2, "git merge", oldlhash)
			}

			if b1 == 0 && b2 == 0 {
				log.Info("got to identical repo", check.GetGoPath(), b1, b2)
				log.Info("got to identical repo", check.GetGoPath(), oldlhash, newmhash)
				// actually identical. do nothing
				continue
			}
			if b1 == 0 && b2 == 1 {
				if check.GetGoPath() == "go.wit.com/log" {
					log.Info("edge case. don't retag.", check.GetGoPath(), b1, b2)
					log.Info("edge case. don't retag.", check.GetGoPath(), oldlhash, newmhash)
				}
				// actually identical. do nothing
				continue
			}
			if check.GetGoPath() == "go.wit.com/log" {
				log.Info("got to log", b1, b2)
				log.Info("got to log", oldlhash, newmhash)
				os.Exit(-1)
			}
			if gitpb.IsGoTagVersionGreater(lastTag, master) {
				// this function is not right really. the hash error above should catch it correctly
				// log.Printf("PROBABLY NOT NEE %-50s tag %s  < %s\n", check.GetGoPath(), lastTag, master)
			}
			log.Printf("NEED RELEASE FOR %-50s tag %s != %s\n", check.GetGoPath(), master, lastTag)
			forceReleaseVersion(check)
			me.found.AppendByGoPath(check)
			continue
		}

		if me.forge.Config.IsPrivate(check.GetGoPath()) {
			// only checks after this are GO dep related which don't matter for private repos
			continue
		}

		if argv.Quick != nil {
			// if argv has 'quick' don't do anything
			// that doesn't actually have a patch
			if master == lastTag {
				continue
			}
		}

		if argv.Protobuf && check.GetRepoType() == "protobuf" {
			log.Printf("NEED RELEASE FOR %s err: %v\n", check.GetGoPath(), "because --protobuf")
			// if --protobuf, this will force upgrade each one
			forceReleaseVersion(check)
			me.found.AppendByGoPath(check)
			continue
		}

		if check.GetGoPath() == "go.wit.com/log" {
			log.Info("got to log")
			os.Exit(-1)
		}

		// if the repo is a go binary or plugin for a new release for
		// any library version change
		//		if check.GetRepoType() == "binary" || check.GetRepoType() == "plugin" {
		// check if the package dependancies changed, if so, re-publish
		if err := me.forge.FinalGoDepsCheckOk(check, false); err == nil {
			// log.Printf("go.sum is perfect! %s\n", check.GetGoPath())
			continue
		} else {
			log.Printf("NEED RELEASE FOR %-50s err: %v\n", check.GetGoPath(), err)
			forceReleaseVersion(check)
			me.found.AppendByGoPath(check)
		}

	}
	me.forge.PrintHumanTable(me.found)
}

func printDone() {
	for _, gopath := range me.done {
		log.Info("printDone() THESE WERE PUBLISHED", gopath)
	}
	log.Sleep(1)
}

func alreadyDone(repo *gitpb.Repo) bool {
	for _, gopath := range me.done {
		// log.Info("WARNING already done", gopath, repo.GetGoPath())
		// log.Info("WARNING already done", gopath, repo.GetGoPath())
		// log.Info("WARNING already done", gopath, repo.GetGoPath())
		if repo.GetGoPath() == gopath {
			log.Info("FOUND. RETURN TRUE. already done", gopath, repo.GetGoPath())
			return true
		}
	}
	return false
}

func checkPublishedGodeps(repo *gitpb.Repo) error {
	godepsOld, err := repo.GoSumFromPkgDir()
	if err != nil {
		return err
	}
	if godepsOld != nil {
		if err := me.forge.TestGoDepsCheckOk(godepsOld, argv.Verbose); err != nil {
			return err
		}
		/*
			all := godepsOld.All()
			for all.Scan() {
				dep := all.Next()
				// log.Info(repo.GetGoPath(), dep.GoPath, dep.Version)

				// check if the package in question is waiting for another package to publish
				found := me.forge.FindByGoPath(dep.GoPath)
				if found == nil {
					return fmt.Errorf("%s has godep %s which can not be found", repo.GetGoPath(), dep.GoPath)
				}
				if found.GetLastTag() != dep.Version {
					return fmt.Errorf("%s with godep %s version mismatch %s vs %s", repo.GetGoPath(), dep.GoPath, found.GetLastTag(), dep.Version)
				}
			}
		*/
	}
	godepsNew, err := repo.GoSumFromRepo()
	if err != nil {
		return err
	}
	if godepsOld == nil {
		if godepsNew == nil {
			log.Printf("%s published godeps == nil && real == nil\n", repo.GetGoPath())
			return nil
		} else {
			return fmt.Errorf("published godeps == nil vs real != nil")
		}
	}
	if err := me.forge.TestGoDepsCheckOk(godepsNew, argv.Verbose); err != nil {
		return err
	}
	return nil
}

/*
func checkGodeps(repo *gitpb.Repo, godeps *gitpb.GoDeps) error {
	if godeps == nil {
	}
	return nil
	all := godeps.All()
	for all.Scan() {
		dep := all.Next()
		// log.Info(repo.GetGoPath(), dep.GoPath, dep.Version)

		// check if the package in question is waiting for another package to publish
		found := me.forge.FindByGoPath(dep.GoPath)
		if found == nil {
			return fmt.Errorf("%s has godep %s which can not be found", repo.GetGoPath(), dep.GoPath)
		}
		if found.GetLastTag() != dep.Version {
			return fmt.Errorf("%s with godep %s version mismatch %s vs %s", repo.GetGoPath(), dep.GoPath, found.GetLastTag(), dep.Version)
		}
		log.Printf("%s with godep %s version match %s vs %s\n", repo.GetGoPath(), dep.GoPath, found.GetLastTag(), dep.Version)
	}
	return nil
}
*/