package gitpb

// runs git, parses output
// types faster than you can

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

	"go.wit.com/log"
)

func (repo *Repo) GetLastTag() string {
	cmd := []string{"git", "rev-list", "--tags", "--max-count=1"}
	result := repo.RunQuiet(cmd)
	log.Info("getLastTagVersion()", result.Stdout)

	if len(result.Stdout) != 1 {
		log.Info("git LastTag() error:", result.Stdout)
		return "error"
	}

	hash := result.Stdout[0]

	cmd = []string{"git", "describe", "--tags", "--always", hash}
	result = repo.RunQuiet(cmd)

	if len(result.Stdout) != 1 {
		log.Info("git LastTag() error:", result.Stdout)
		return "error"
	}

	return result.Stdout[0]
}

func (repo *Repo) GitMasterVersion() string {
	v, err := repo.gitVersionByName("master")
	/*
	count := repo.LenGitTags()
	log.Info(repo.GoPath, "tag count", count)
	repo.UpdateGitTags()
	count = repo.LenGitTags()
	log.Info(repo.GoPath, "tag count", count)
	*/

	if err == nil {
		return v
	} else {
		log.Info("GitMasterVersion() error", err)
		return "error"
	}
}

func (repo *Repo) GitDevelVersion() string {
	v, err := repo.gitVersionByName("devel")
	if err == nil {
		return v
	} else {
		log.Info("GitMasterVersion() error", err)
		return "error"
	}
}

func (repo *Repo) GitUserVersion() string {
	v, err := repo.gitVersionByName("jcarr")
	if err == nil {
		return v
	} else {
		log.Info("GitMasterVersion() error", err)
		return "error"
	}
}

func (repo *Repo) gitVersionByName(name string) (string, error) {
	name = strings.TrimSpace(name)

	if name == "" {
		// git will return the current tag
		r := repo.RunQuiet([]string{"git", "describe", "--tags", "--always"})
		output := strings.Join(r.Stdout, "\n")
		if r.Error != nil {
			log.Warn("gitDescribeByName() not in a git repo?", r.Error, repo.GoPath)
		}
		return strings.TrimSpace(output), r.Error
	}
	if !repo.LocalTagExists(name) {
		// tag does not exist
		log.Warn("LocalTagExists()", name, "did not exist")
		return "", errors.New("gitDescribeByName() git fatal: Not a valid object name")
	}
	cmd := []string{"git", "describe", "--tags", "--always", name}
	result := repo.RunQuiet(cmd)
	output := strings.Join(result.Stdout, "\n")
	if result.Error != nil {
		log.Warn("cmd =", cmd)
		log.Warn("err =", result.Error)
		log.Warn("not in a git repo or bad tag?", repo.GoPath)
	}

	return strings.TrimSpace(output), result.Error
}

func (repo *Repo) LocalTagExists(findname string) bool {
	loop := repo.AllTags()
	for loop.Scan() {
		t := loop.Next()
		log.Info("tag:", t.Refname)

		tagname := t.Refname
		if strings.HasPrefix(tagname, "refs/remotes") {
			continue
		}
		path, filename := filepath.Split(tagname)
		log.Log(GITPB, "tag:", path, filename, "from", repo.GoPath)
		if filename == findname {
			log.Log(GITPBWARN, "found tag:", path, filename, "from", repo.GoPath)
			return true
		}
	}
	return false
}