package main

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

	"go.wit.com/dev/alexflint/arg"
	"go.wit.com/gui"
	"go.wit.com/lib/gui/repolist"
	"go.wit.com/lib/gui/shell"
	"go.wit.com/lib/protobuf/forgepb"
	"go.wit.com/lib/protobuf/gitpb"
	"go.wit.com/log"
)

// sent via -ldflags
var VERSION string
var BUILDTIME string

var pp *arg.Parser
var forge *forgepb.Forge
var rv *repolist.RepoList
var argvRepo *gitpb.Repo

func main() {
	pp = arg.MustParse(&argv)

	// for very new users or users unfamilar with the command line, this may help them
	if argv.Repo == "help" || argv.Repo == "?" {
		pp.WriteHelp(os.Stdout)
		os.Exit(0)
	}
	if argv.Repo == "version" {
		log.Info(argv.Version())
		os.Exit(0)
	}

	// load the ~/.config/forge/ config
	// this lets you configure repos you have read/write access too
	forge = forgepb.Init()
	// forge.ConfigPrintTable()
	os.Setenv("REPO_WORK_PATH", forge.GetGoSrc())

	argvRepo = forge.Repos.FindByGoPath(argv.Repo)
	if argvRepo == nil {
		log.Info("yep, need to clone", argv.Repo)
	} else {
		log.Info("already have", argv.Repo)
		build()
		okExit(argv.Repo)
	}

	// gui is in testing
	myGui := gui.New()
	// myGui.Default()

	// find and scan all repos
	rv := repolist.Init(forge, myGui)
	rv.Enable()
	rv.ScanRepositories()

	// run 'git pull' if argv --git-pull
	if argv.Pull {
		gitPull()
		okExit("git pull")
	}

	// remake all the go.sum & go.mod in every repo
	// todo: make go.sum and go.mod git commit metadata
	if argv.RedoGoMod {
		redoGoModAll()
	}

	// this works sometimes
	if argv.Recursive {
		recursiveClone()
		autoWork()
		build()
		okExit("--recursive")
	}

	clone()
	autoWork()
	if argv.Install {
		if err := forge.Install(argvRepo, nil); err == nil {
			okExit("install worked")
		} else {
			badExit(err)
		}
	}
	if argv.Build {
		if err := forge.Build(argvRepo, nil); err == nil {
			okExit("build worked")
		} else {
			badExit(err)
		}
	}
	okExit("skipping build of " + argv.Repo)
}

func okExit(thing string) {
	log.Info(thing, "ok")
	log.Info("Finished clone on", argvRepo.GetGoPath(), "ok")
	os.Exit(0)
}

func badExit(err error) {
	log.Info("Total repositories:", forge.Repos.Len())
	log.Info("Finished go-clone with error", err)
	os.Exit(-1)
}

func clone() {
	// if the user defined a repo, attempt to download it now
	if argv.Repo != "" {
		os.Setenv("REPO_AUTO_CLONE", "true")
		// pb, _ := forge.NewGoPath(argv.Repo)
		pb, err := forge.Clone(argv.Repo)
		if err != nil {
			log.Info("could not download")
			badExit(err)
		}
		newr, err := rv.AddRepo(pb)
		if err != nil {
			log.Info("repolist.AddRepo() failed")
			badExit(err)
		}

		// update go.sum and go.mod
		// todo: only do this if they don't exist?
		// todo: make these git commit metadata
		newr.MakeRedoMod()

		// double check it actually downloaded
		fullgitdir := filepath.Join(forge.GetGoSrc(), argv.Repo, ".git")
		if !shell.IsDir(fullgitdir) {
			log.Info("repo cloned failed", filepath.Join(forge.GetGoSrc(), argv.Repo))
			badExit(errors.New(fullgitdir + " was not created"))
		}
		build()
		// exit unless other --argv options are set
		if !(argv.Recursive || argv.Pull || argv.RedoGoMod) {
			log.Info("repo cloned worked to", filepath.Join(forge.GetGoSrc(), argv.Repo))
			okExit(argv.Repo)
		}
		log.Info("onward and upward")
	}
}

func gitPull() {
	log.Info("Total repositories:", forge.Repos.Len())
	log.Info("Going to run git pull in each one. TODO: use rill here")
	log.Sleep(1)
	pull := []string{"git", "pull"}

	var trycount, errcount int
	repos := forge.Repos.SortByGoPath()
	for repos.Scan() {
		repo := repos.Next()
		if argv.DryRun {
			log.Info("git pull --dry-run", repo.GoPath)
			continue
		}
		log.Info("git pull:", repo.FullPath)
		trycount += 1
		log.Info("actually run: git pull:", repo.GoPath)
		if result := shell.PathRunRealtime(repo.FullPath, pull); result.Error != nil {
			log.Info("git pull error:", result.Error)
			errcount += 1
		}
	}
	log.Info("Total repositories:", forge.Repos.Len(), "Total attempted:", trycount, "Errors:", errcount)
}

func recursiveClone() {
	// this works sometimes
	if argv.Recursive {
		newr := rv.FindByName(argv.Repo)
		if newr == nil {
			log.Info("how did this repo still not exist?", argv.Repo)
			badExit(errors.New("failed to clone repo: " + argv.Repo))
		}
		os.Setenv("REPO_AUTO_CLONE", "true")
		godep := newr.Status.GetGoDeps()
		for gopath, version := range godep {
			pb, err := forge.Clone(gopath)
			if err != nil {
				log.Info("could not download")
				badExit(err)
			}
			repo, err := rv.AddRepo(pb)
			if err != nil {
				log.Info("git clone failed for", gopath, version)
				continue
			}
			// always do this for now. probably always forever
			repo.MakeRedoMod()
		}
	}
}

func redoGoModAll() {
	loop := rv.ReposSortByName()
	for loop.Scan() {
		repo := loop.Repo()
		repo.MakeRedoMod()
	}
}

func build() error {
	if argv.Install {
		if err := forge.Install(argvRepo, nil); err == nil {
			okExit("install worked")
		} else {
			badExit(err)
		}
	}
	if argv.Build {
		return forge.Build(argvRepo, nil)
	}
	log.Info("skipping build")
	return nil
}

func autoWork() {
	// remake the go.work file
	if argv.AutoWork {
		log.Info("About to re-create", forge.GetGoSrc()+"/go.work")
		log.Info("Sleep 3. original go.work saved as go.work.last (hit ctrl-c to cancel)")
		log.Sleep(3)
		shell.PathRun(forge.GetGoSrc(), []string{"mv", "go.work", "go.work.last"})
		rv.MakeGoWork()
		shell.PathRun(forge.GetGoSrc(), []string{"go", "work", "use"})
		log.Info("")
		log.Info("original go.work file saved as go.work.last")
		log.Info("")
		okExit("go.work create")
	}

}