package main

import (
	"fmt"
	"time"

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

var ErrorNotAllReposOnMaster error = fmt.Errorf("not all repos on are on the master branch")
var ErrorNotAllReposOnDevel error = fmt.Errorf("not all repos on are on the devel branch")
var ErrorNotAllReposOnUser error = fmt.Errorf("not all repos on are on the user branch")

func IsEverythingOnMaster() (int, int, int, error) {
	var total int
	var count int
	var nope int

	// first make sure every repo is on the master branch
	all := me.forge.Repos.All()
	for all.Scan() {
		repo := all.Next()
		total += 1
		if repo.GetMasterBranchName() == repo.GetCurrentBranchName() {
			count += 1
		} else {
			nope += 1
		}
	}
	if total != count {
		// log.Info(ErrorNotAllReposOnMaster)
		return total, count, nope, ErrorNotAllReposOnMaster
	}
	return total, count, nope, nil
}

func IsEverythingOnDevel() (int, int, int, error) {
	var total int
	var count int
	var nope int

	// first make sure every repo is on the master branch
	all := me.forge.Repos.All()
	for all.Scan() {
		repo := all.Next()
		total += 1
		if repo.GetDevelBranchName() == repo.GetCurrentBranchName() {
			count += 1
		} else {
			nope += 1
		}
	}
	if total != count {
		return total, count, nope, ErrorNotAllReposOnDevel
	}
	return total, count, nope, nil
}

func IsEverythingOnUser() (int, int, int, error) {
	var total int
	var count int
	var nope int

	// first make sure every repo is on the master branch
	all := me.forge.Repos.All()
	for all.Scan() {
		repo := all.Next()
		total += 1
		if repo.GetCurrentBranchName() == repo.GetUserBranchName() {
			count += 1
		} else {
			nope += 1
		}
	}
	if total != count {
		return total, count, nope, ErrorNotAllReposOnUser
	}
	return total, count, nope, nil
}

func doGitReset() {
	all := me.found.SortByFullPath()
	for all.Scan() {
		repo := all.Next()
		if me.forge.Config.IsReadOnly(repo.GetGoPath()) {
			// log.Info("is readonly", repo.GetGoPath())
			if repo.CheckDirty() {
				log.Info("is readonly and dirty", repo.GetGoPath())
				cmd := []string{"git", "reset", "--hard"}
				repo.RunRealtime(cmd)
			}
		} else {
			// log.Info("is not readonly", repo.GetGoPath())
		}
	}
}

func rillCheckoutUser(repo *gitpb.Repo) error {
	if repo.IsDirty() {
		// never do dirty repos
		return nil
	}
	if repo.GetCurrentBranchName() == repo.GetMasterBranchName() {
		// repo is already on devel branch. have to move them there first for now
		// return repo.CheckoutDevel()
	}
	if repo.GetCurrentBranchName() == repo.GetUserBranchName() {
		// repo is already on user branch
		return nil
	}
	if err := repo.CheckoutUser(); err != nil {
		log.Info(repo.GetFullPath(), err)
		return err
	}
	return nil
}

// trys to figure out if there is still something to update
func doAllCheckoutUser() error {
	now := time.Now()
	me.forge.RillFuncError(rillCheckoutUser)
	count := me.forge.RillReload()
	if count != 0 {
		me.forge.ConfigSave()
	}

	total, count, nope, err := IsEverythingOnUser()
	log.Printf("User branch check. %d total repos. (%d ok) (%d not on user branch) (%s)\n", total, count, nope, shell.FormatDuration(time.Since(now)))
	if err != nil {
		// display all repos not on user
		me.found = new(gitpb.Repos)
		all := me.forge.Repos.SortByFullPath()
		for all.Scan() {
			repo := all.Next()
			if repo.GetCurrentBranchName() != repo.GetUserBranchName() {
				me.found.AppendByGoPath(repo)
			}
		}
		me.forge.PrintHumanTable(me.found)
		log.Printf("There are %d repos that are NOT on the user branch\n", me.found.Len())
		return err
	}
	return nil
}

func rillCheckoutDevel(repo *gitpb.Repo) error {
	if repo.IsDirty() {
		// never do dirty repos
		return nil
	}
	if repo.GetCurrentBranchName() == repo.GetDevelBranchName() {
		// repo is already on devel branch
		return nil
	}
	repo.CheckoutDevel()
	return nil
}

// is every repo on the devel branch?
func doAllCheckoutDevel() error {
	now := time.Now()
	me.forge.RillFuncError(rillCheckoutDevel)
	count := me.forge.RillReload()
	if count != 0 {
		me.forge.ConfigSave()
	}

	total, count, nope, err := IsEverythingOnDevel()
	log.Printf("Devel branch check. %d total repos. (%d ok) (%d not on devel branch) (%s)\n", total, count, nope, shell.FormatDuration(time.Since(now)))
	if err != nil {
		// display all repos not on user
		me.found = new(gitpb.Repos)
		all := me.forge.Repos.SortByFullPath()
		for all.Scan() {
			repo := all.Next()
			if repo.GetCurrentBranchName() != repo.GetDevelBranchName() {
				me.found.AppendByGoPath(repo)
			}
		}
		me.forge.PrintHumanTable(me.found)
		log.Printf("There are %d repos that are NOT on the devel branch\n", me.found.Len())
		return err
	}
	return nil
}

func rillCheckoutMaster(repo *gitpb.Repo) error {
	if repo.IsDirty() {
		// never do dirty repos
		return nil
	}
	if repo.GetCurrentBranchName() == repo.GetMasterBranchName() {
		// repo is already on master
		return nil
	}
	if repo.GetUserVersion() == "uerr" {
		repo.CheckoutMaster()
		return nil
	}
	if me.forge.Config.IsReadOnly(repo.GetGoPath()) {
		// skip other checks for readonly repos
		repo.CheckoutMaster()
		return nil
	}
	/*
		if repo.GetUserVersion() != repo.GetDevelVersion() {
			// don't switch branches if the user branch has uncommitted patches
			return nil
		}
		if repo.GetDevelVersion() != repo.GetMasterVersion() {
			// don't switch braches if the devel branch does not match master (needs merge)
			return nil
		}
	*/
	repo.CheckoutMaster()
	return nil
}

// trys to figure out if there is still something to update
func doAllCheckoutMaster() error {
	now := time.Now()
	me.forge.RillFuncError(rillCheckoutMaster)
	count := me.forge.RillReload()
	if count != 0 {
		me.forge.ConfigSave()
	}

	total, count, nope, err := IsEverythingOnMaster()
	log.Printf("Master branch check. %d total repos. (%d ok) (%d not on master branch) (%s)\n", total, count, nope, shell.FormatDuration(time.Since(now)))
	if err != nil {
		// display all repos not on master
		me.found = new(gitpb.Repos)
		all := me.forge.Repos.SortByFullPath()
		for all.Scan() {
			repo := all.Next()
			if repo.GetCurrentBranchName() != repo.GetMasterBranchName() {
				me.found.AppendByGoPath(repo)
			}
		}
		me.forge.PrintHumanTable(me.found)
		log.Printf("There are %d repos that are NOT on the master branch\n", me.found.Len())
		return err
	}
	return nil
}

// trys to figure out if there is still something to update
// todo: redo this logic as it is terrible

func doCheckout() error {
	if argv.Checkout.User != nil {
		doAllCheckoutUser()
		okExit("")
	}

	if argv.Checkout.Devel != nil {
		doAllCheckoutDevel()
		okExit("")
	}

	if argv.Checkout.Master != nil {
		doAllCheckoutMaster()
		okExit("")
	}
	return nil
}