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

package main

import (
	"path/filepath"

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

func doPatchInit() {
	if me.forge.Patchsets != nil {
		if me.forge.Patchsets.Len() == 0 {
			// log.Info("IGNORE: patches are empty")
		} else {
			log.Info("IGNORE: patches already initalized len =", me.forge.Patchsets.Len())
		}
	}
	if err := me.forge.LoadPatchsets(); err != nil {
		log.Info("patches failed to open", err)
		if err := me.forge.SavePatchsets(); err != nil {
			log.Warn("savePatchsets() failed", err)
		}
	}
}

func isPatchingSafe() bool {
	if me.forge.Config.Mode == forgepb.ForgeMode_NORMAL {
		return true
	}
	log.Info("forge requres a 'normal' state to work with patches")
	log.Info("you must run:")
	log.Info("")
	log.Info("forge normal")
	log.Info("")
	return false
}

func doPatch() error {
	if argv.Patch.Repos != nil {
		dumpDirtyRepos()
		return nil
	}

	if !isPatchingSafe() {
		return log.Errorf("not safe to work on patches")
	}

	if argv.Patch.Submit != nil {
		pset, err := me.forge.MakeDevelPatchSet("testing")
		if err != nil {
			return err
		}
		pset.Patches.HttpPostVerbose(myServer(), "new")
		return nil
	}

	if argv.Patch.Get != nil {
		psets := forgepb.NewPatchsets()
		newpb, _, _ := psets.HttpPostVerbose(myServer(), "get")
		newpb.PrintTable()
		me.forge.Patchsets = newpb
		me.forge.SavePatchsets()
		return nil
	}

	if argv.Patch.Check != nil {
		/*
			old := findExpired()
			// old.PrintTable()
			for p := range old.IterAll() {
				log.Info("patch", p.Filename, p.Namespace)
			}
			newpb, err := old.HttpPostVerbose(myServer(), "check")
			if err != nil {
				return err
			}
			newpb.PrintTable()
		*/
		log.Info("do something here to find patches merged to devel")
		doMergeReport()
		return nil
	}

	if argv.Patch.List != nil {
		var changed bool
		newpatches := forgepb.NewPatches()
		for pset := range me.forge.Patchsets.IterAll() {
			log.Info(pset.Uuid)
			for patch := range pset.Patches.IterAll() {
				if setNewCommitHash(patch) {
					changed = true
				}
				if patch.NewHash == "na" {
					newpatches.Append(patch)
					log.Info("apply this patch?")
				}
			}

			/*
				for patch := range pset.Patches.IterAll() {
					if repo, ok := me.forge.IsPatchApplied(patch); ok {
						log.Info("\tfound patch in repo", repo.Namespace, patch.Filename)
					} else {
						log.Info("\tdid not find patch", patch.CommitHash, patch.NewHash, patch.Filename)
					}
				}
			*/
		}
		if changed {
			if err := me.forge.SavePatchsets(); err != nil {
				log.Warn("savePatchsets() failed", err)
			}
		}
		me.forge.Patchsets.PrintTable()
		if newpatches.Len() != 0 {
			for patch := range newpatches.IterAll() {
				log.Info("new patch:", patch.CommitHash, patch.NewHash, patch.Filename)
				repo := me.forge.FindByGoPath(patch.Namespace)
				if repo == nil {
					log.Info("\tCould not find namespace:", patch.Namespace)
					continue
				}
				if fhelp.QuestionUser("apply this patch?") {
					newhash, err := applyAndTrackPatch(repo, patch)
					log.Info("apply results:", newhash, err)
				}
			}
			return log.Errorf("patches need to be applied")
		}

		// return doPatchList()
		applied := findApplied()
		if applied.Len() == 0 {
			log.Info("no patches have been appled to the devel branch yet")
			return nil
		}
		// for patch := range applied.IterAll() {
		// 	log.Info("SEND APPLIED: newhash:", patch.NewHash, "commithash:", patch.CommitHash, "patch", patch.Namespace)
		// }
		newpb, _, err := applied.HttpPostVerbose(myServer(), "applied")
		if err != nil {
			return err
		}
		newpb.PrintTable()
		return nil
	}

	// if nothing, show patches & dirty repos
	me.forge.Patchsets.PrintTable()
	dumpDirtyRepos()
	return nil
}

func dumpDirtyRepos() {
	// always run dirty first
	me.forge.CheckDirtyQuiet()

	// if no option is given to patch, list out the
	// repos that have patches ready in them
	found := findReposWithPatches()
	if found.Len() == 0 {
		log.Info("you currently have no repos with patches")
	} else {
		me.forge.PrintHumanTable(found)
	}
}

// returns bad if patches can not be applied
// logic is not great here but it was a first pass
func dumpPatchset(pset *forgepb.Patchset) bool {
	// don't even bother to continue if we already know it's broken
	if pset.State == "BROKEN" {
		log.Printf("Patchset Name: %-24s Author: %s <%s> IS BAD\n", pset.Name, pset.GetGitAuthorName(), pset.GetGitAuthorEmail())
		return false
	} else {
		log.Printf("Patchset Name: %-24s Author: %s <%s> IS GOOD\n", pset.Name, pset.GetGitAuthorName(), pset.GetGitAuthorEmail())
	}

	var count int
	var bad int
	all := pset.Patches.SortByFilename()
	for all.Scan() {
		p := all.Next()
		if IsValidPatch(p) {
			// ok
		} else {
			pset.State = "BROKEN"
			bad += 1
		}
		count += 1
	}
	log.Info("pset has", count, "total patches, ", bad, "bad patches")
	if bad == 0 {
		return true
	}
	return false
}

func IsValidPatch(p *forgepb.Patch) bool {
	basepath, filename := filepath.Split(p.Filename)
	repo := me.forge.FindByGoPath(basepath)
	if argv.Verbose {
		log.Info("start:", p.StartHash, "end:", p.CommitHash, "file:", basepath, filename, "devel version", repo.GetDevelVersion())
	}
	if repo == nil {
		log.Info("can not apply patch! repo not found", basepath, filename)
		return false
	}
	if repo.ActualDevelHash() != p.StartHash {
		log.Info("can not apply patch! devel hash mismatch", basepath, filename)
		return false
	}
	if repo.ActualDevelHash() == p.StartHash {
		log.Info("local devel hash:", repo.ActualDevelHash(), "matches patch hash", p.StartHash, "and can be applied")
	}
	log.Info("start:", p.StartHash, "end:", p.CommitHash, "file:", basepath, filename, "devel version", repo.GetDevelVersion())
	for _, line := range p.Files {
		log.Info("\t", line)
	}
	return true
}