package gitpb

import (
	"os"
	"path/filepath"
	"strings"

	"go.wit.com/log"
)

type Patch struct {
	GoPath  string
	Ref     string
	giturl  string
	comment string
}

// move all this to repolist and gowit repos

func (repo *Repo) GetPatches(oldname string, newname string) (int, []*Patch) {
	var patchcount int
	patches := make([]*Patch, 0, 0)

	if oldname == newname {
		return 0, nil
	}
	// log.Info("repo userv, develv", userv, develv)
	gitcmd := []string{"git", "log", "--oneline", oldname + ".." + newname}
	log.Info("Run:", gitcmd)
	r := repo.Run(gitcmd)
	if r.Error != nil {
		log.Info("git failed ", repo.GetGoPath(), "err =", r.Error)
		return 0, nil
	}

	// patches = strings.Split(output, "\n")
	log.Info("Run:", r.Stdout)
	for _, line := range r.Stdout {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		parts := strings.Split(line, " ")
		newp := new(Patch)
		newp.Ref = parts[0]
		newp.comment = strings.Join(parts[1:], " ")
		log.Info("Patch line:", line, repo.GetGoPath())
		patchcount += 1
		patches = append(patches, newp)
	}
	return patchcount, patches
}

func (repo *Repo) GetUserPatches() (int, []*Patch) {
	usern := repo.GetUserBranchName()
	develn := repo.GetDevelBranchName()
	userv := repo.GetUserVersion()
	develv := repo.GetDevelVersion()

	if userv == develv {
		return 0, nil
	}

	c, all := repo.GetPatches(develn, usern)
	log.Info("GetPatches() guireleaser", develn, usern, "count =", c)
	return c, all
}

func (repo *Repo) GetMasterPatches() (int, []*Patch) {
	lasttag := repo.GetLastTag()
	mastern := repo.GetMasterBranchName()
	masterv := repo.GetMasterVersion()

	if lasttag == masterv {
		return 0, nil
	}

	c, all := repo.GetPatches(lasttag, mastern)
	log.Info("GetPatches() guireleaser", lasttag, mastern, "count =", c)
	return c, all
}

func (all *Repos) MakePatchset(setdir string) bool {
	loop := all.SortByFullPath()
	for loop.Scan() {
		repo := loop.Next()
		log.Info("repo", repo.GetGoPath())
		userv := repo.GetUserVersion()
		develv := repo.GetDevelVersion()
		usern := repo.GetUserBranchName()
		develn := repo.GetDevelBranchName()
		if userv == develv {
			// this repo is unchanged
			continue
		}

		repodir := filepath.Join(setdir, repo.GetGoPath())
		os.MkdirAll(repodir, os.ModeDir)
		// git format-patch branch1..branch2
		gitcmd := []string{"git", "format-patch", "-o", repodir, develn + ".." + usern}
		log.Info("Run:", gitcmd)
		r := repo.Run(gitcmd)
		log.Info("output =", r.Stdout)
		if r.Error == nil {
			log.Info("patches made okay for:", repo.GetGoPath())
			continue
		}
		log.Info("patches failed for:", repo.GetGoPath())
		return false
	}
	return true
}