// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0

package main

import (
	"bytes"
	"fmt"
	"os"
	"os/exec"
	"regexp"
	"strings"

	"go.wit.com/lib/protobuf/forgepb"
	"go.wit.com/log"
)

/*
type stdPatchsetTableWin struct {
	sync.Mutex
	win    *gadgets.GenericWindow  // the machines gui window
	box    *gui.Node               // the machines gui parent box widget
	TB     *forgepb.PatchsetsTable // the gui table buffer
	update bool                    // if the window should be updated
}

func (w *stdPatchsetTableWin) Toggle() {
	if w == nil {
		return
	}
	if w.win == nil {
		return
	}
	w.win.Toggle()
}
*/

/*
	etimef := func(e *forgepb.Patchset) string {
		etime := e.Etime.AsTime()
		s := etime.Format("2006/01/02 15:04")
		if strings.HasPrefix(s, "1970/") {
			// just show a blank if it's not set
			return ""
		}
		return s
	}
	t.AddStringFunc("etime", etimef)
*/

/*
	ctimef := func(p *forgepb.Patchset) string {
		ctime := p.Ctime.AsTime()
		return ctime.Format("2006/01/02 15:04")
	}
}
*/

func setPatchsetState(p *forgepb.Patchset) {
	var bad bool
	var good bool
	var done bool = true

	all := p.Patches.All()
	for all.Scan() {
		patch := all.Next()
		// log.Info("patch:", patch.StartHash, patch.CommitHash, patch.Namespace, patch.Filename)
		repo := me.forge.FindByGoPath(patch.Namespace)
		if repo == nil {
			log.Info("could not find repo", patch.Namespace)
			bad = true
			continue
		}
		if _, err := repo.GetHashName(patch.CommitHash); err == nil {
			// this patch has been applied
			patch.Applied = true
			done = true
			continue
		}
		if name, err := repo.GetHashName(patch.StartHash); err == nil {
			// it might be possible to apply this patch
			log.Info("patch may be good:", patch.Namespace, name, patch.CommitHash, patch.Filename)
			good = true
		} else {
			// probably screwed up git trees
			log.Info("patch with unknown origin:", patch.Namespace, name, err, patch.CommitHash, patch.Filename)
			bad = true
		}
	}
	if bad {
		p.State = "BAD"
		return
	}
	if good {
		p.State = "TRY"
		return
	}
	if done {
		p.State = "DONE"
		return
	}
}

func cleanSubject(line string) string {
	// Regular expression to remove "Subject:" and "[PATCH...]" patterns
	re := regexp.MustCompile(`(?i)^Subject:\s*(\[\s*PATCH[^\]]*\]\s*)?`)
	cleaned := re.ReplaceAllString(line, "")
	return strings.TrimSpace(cleaned)
}

func findCommitByHash(hash string, subject string) (string, error) {
	cmd := exec.Command("git", "log", "--pretty=format:%H %s")
	var out bytes.Buffer
	cmd.Stdout = &out
	err := cmd.Run()
	if err != nil {
		return "", err
	}

	lines := strings.Split(out.String(), "\n")
	for _, line := range lines {
		if strings.Contains(strings.ToLower(line), strings.ToLower(subject)) {
			return strings.Fields(line)[0], nil // return the commit hash
		}
		if strings.Fields(line)[0] == hash {
			return "", fmt.Errorf("start commit found: %s", hash)
		}
	}
	return "", fmt.Errorf("no commit found for subject: %s", subject)
}

func findCommitBySubject(subject string) (string, error) {
	cmd := exec.Command("git", "log", "--pretty=format:%H %s", "--grep="+subject, "-i")
	var out bytes.Buffer
	cmd.Stdout = &out
	err := cmd.Run()
	if err != nil {
		return "", err
	}

	lines := strings.Split(out.String(), "\n")
	for _, line := range lines {
		if strings.Contains(strings.ToLower(line), strings.ToLower(subject)) {
			return strings.Fields(line)[0], nil // return the commit hash
		}
	}
	return "", fmt.Errorf("no commit found for subject: %s", subject)
}

func setNewCommitHash(p *forgepb.Patchset) bool {
	var done bool = true
	for patch := range p.Patches.IterAll() {
		// parts := strings.Fields(patch.Comment)

		repo := me.forge.FindByGoPath(patch.Namespace)
		if repo == nil {
			log.Info("could not find repo", patch.Namespace)
			continue
		}

		comment := cleanSubject(patch.Comment)

		if patch.NewHash != "na" {
			log.Info("patch: newhash:", patch.NewHash, "commithash:", patch.CommitHash, patch.Namespace, comment)
			continue
		}
		done = false
		os.Chdir(repo.GetFullPath())
		newhash, err := findCommitBySubject(comment)
		if err != nil {
			log.Info("patch: not found hash:", patch.CommitHash, patch.Namespace, comment, newhash, err)
			continue
		}
		patch.NewHash = newhash
		log.Info("patch: found hash:", patch.CommitHash, newhash, patch.Namespace, comment)
	}

	return done
}

/*
func AddNotDonePatches(notdone *forgepb.Patches, pset *forgepb.Patchset, full bool) {
	for patch := range pset.Patches.IterAll() {
		comment := cleanSubject(patch.Comment)

		if found := notdone.FindByCommitHash(patch.CommitHash); found != nil {
			log.Info("duplicate notdone", patch.Namespace, "patch:", patch.NewHash, "commithash:", patch.CommitHash, comment)
			continue
		}

		repo := me.forge.FindByGoPath(patch.Namespace)
		if repo == nil {
			log.Info("could not find repo", patch.Namespace)
			if full {
				notdone.AppendByCommitHash(patch) // double check to ensure the commit hash isn't added twice
			}
			continue
		}

		if patch.NewHash != "na" {
			log.Info("already applied patch", patch.Namespace, ": newhash:", patch.NewHash, "commithash:", patch.CommitHash, comment)
			continue
		}
		os.Chdir(repo.GetFullPath())
		newhash, err := findCommitByHash(patch.StartHash, comment)
		if err != nil {
			// this patch has not been applied yet
			log.Info("patch: not found hash:", patch.Namespace, patch.CommitHash, comment, err)
			notdone.AppendByCommitHash(patch) // double check to ensure the commit hash isn't added twice
			continue
		}

		newhash, err = findCommitBySubject(comment)
		if err == nil {
			patch.NewHash = newhash
			log.Info("patch: found hash:", patch.Namespace, "commit patch", patch.CommitHash, "new hash", newhash, "start hash", patch.StartHash, comment)
			continue
		}

		// this patch has not been applied yet
		log.Info("patch: not found hash:", patch.Namespace, patch.CommitHash, comment, newhash, err)
		notdone.AppendByCommitHash(patch) // double check to ensure the commit hash isn't added twice
	}
}
*/