package forgepb

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

	"github.com/google/uuid"
	"go.wit.com/log"
	"google.golang.org/protobuf/proto"
)

func (f *Forge) LoadPatchsets() error {
	f.Patchsets = NewPatchsets()

	filename := filepath.Join(f.patchDir, "all-patches.pb")

	data, err := os.ReadFile(filename)
	if err != nil {
		return err
	}

	err = f.Patchsets.Unmarshal(data)
	if err != nil {
		log.Infof("LoadPatchsets() proto.Marshal() error %v\n", err)
		return err
	}
	log.Infof("LoadPatchsets() worked ok %d\n", f.Patchsets.Len())
	return nil
}

func (f *Forge) SavePatchsets() error {
	filename := filepath.Join(f.patchDir, "all-patches.pb")
	regfile, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
	if err != nil {
		log.Info("SavePatchsets() filename open error:", filename, err)
		// fmt.Fprintln(w, "filename open error:", filename, err)
		return err
	}
	defer regfile.Close()

	newpb := proto.Clone(f.Patchsets).(*Patchsets)
	if newpb == nil {
		for pset := range f.Patchsets.IterAll() {
			pset.ShowPatchsets()
		}
		return log.Errorf("SavePatchsets() Clone failed!")
	}

	data, err := newpb.Marshal()
	if err != nil {
		log.Infof("SavePatchset() proto.Marshal() error %v\n", err)
		return err
	}
	log.Infof("SavePatchset() worked (%d) bytes\n", len(data))
	regfile.Write(data)
	return nil
}

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 (pb *Patchset) ShowPatchsets() error {
	author := "Author: " + pb.GitAuthorName
	author += " <" + pb.GitAuthorEmail + ">"
	log.Printf("%-16s %s %s %s\n", string(pb.Uuid)[0:8], pb.Name, pb.Comment, author)
	for _, patch := range pb.Patches.Patches {
		comment := cleanSubject(patch.Comment)
		log.Printf("\t%-8s %-50s %-50s\n", string(patch.CommitHash)[0:8], patch.Namespace, comment)
	}
	/*
		for patch := range pb.IterAll() {
			comment := cleanSubject(patch.Comment)
			log.Info("\tnew patch:", patch.NewHash, "commithash:", patch.CommitHash, patch.Namespace, comment)
		}
	*/
	return nil
}

// adds a patchset or just the patches
func (f *Forge) AddPatchset(pb *Patchset) {
	// if the name of the patchset is "forge auto commit"
	// then just add all the patches
	if pb.Name == "forge auto commit" {
		author := "Author: " + pb.GitAuthorName
		author += " <" + pb.GitAuthorEmail + ">"

		// author := "Author: " + os.Getenv("GIT_AUTHOR_NAME")
		// author += " <" + os.Getenv("GIT_AUTHOR_EMAIL") + ">"
		fmt.Println(pb.Name, pb.Comment, author)
		for _, patch := range pb.Patches.Patches {
			// log.Info("\tnew patch:", i, patch.CommitHash, patch.Namespace)
			if f.findPatch(patch) {
				// log.Info("\talready found!!!!!!!", pset.Uuid, patch.Namespace)
			} else {
				log.Info("\tnew patch:", pb.Name, pb.Comment, author)
				f.addRandomPatch(patch)
			}
		}
		return
	}

	// if you got here, this patchset was submitted with a name

	// Has this patchset already been submitted?
	for pset := range f.Patchsets.IterAll() {
		if pset.Uuid == pb.Uuid {
			log.Info("ALREADY ADDED", pset.Uuid, pset.Name)
			return
		}
	}

	// Clone() this protobuf into me.forge.Patchsets
	var newpb *Patchset
	newpb = proto.Clone(pb).(*Patchset)
	if newpb != nil {
		f.Patchsets.Patchsets = append(f.Patchsets.Patchsets, newpb)
	}
}

func (f *Forge) findAutoPatchset() *Patchset {
	for pset := range f.Patchsets.IterAll() {
		if pset.Name == "forge auto commit" {
			return pset
		}
	}

	var fauto *Patchset
	log.Warn("findAutoPatchset() had to create 'forge auto commit'")
	if fauto == nil {
		fauto = new(Patchset)
		fauto.Name = "forge auto commit"
		fauto.Patches = NewPatches()
		fauto.Uuid = uuid.New().String()
		f.Patchsets.Patchsets = append(f.Patchsets.Patchsets, fauto)
	}
	return fauto
}

// adds submitted patches not specifically assigned to a patchset
// to the generic patchset called "forge auto commit"
func (f *Forge) addRandomPatch(patch *Patch) error {
	// ignore patch if it's already here
	if f.findPatch(patch) {
		log.Info("already found patch", patch.CommitHash, patch.Namespace)
		return nil
	}
	fauto := f.findAutoPatchset()
	if fauto == nil {
		return log.Errorf("no default place yet")
	}
	newpb := proto.Clone(patch).(*Patch)
	if newpb == nil {
		return log.Errorf("proto.Clone returned nil")
	}
	fauto.Patches.Patches = append(fauto.Patches.Patches, newpb)
	return nil
}

// returns true if the patch already exists in the protobuf
func (f *Forge) findPatch(newpatch *Patch) bool {
	// log.Info("\tlook for patch:", newpatch.CommitHash, newpatch.Namespace)

	for pset := range f.Patchsets.IterAll() {
		for _, patch := range pset.Patches.Patches {
			if patch.CommitHash == newpatch.CommitHash {
				// log.Info("\tfound pset!!!!!!", pset.Uuid, patch.Namespace)
				return true
			}

		}
	}

	return false
}