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

package main

import (
	"fmt"
	"os"
	"path/filepath"
	"sync"

	"go.wit.com/gui"
	"go.wit.com/lib/gadgets"
	"go.wit.com/lib/protobuf/forgepb"
	"go.wit.com/lib/protobuf/gitpb"
	"go.wit.com/log"
)

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

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

func makePatchesWin(patches *forgepb.Patches) *stdPatchTableWin {
	dwin := new(stdPatchTableWin)
	dwin.win = gadgets.NewGenericWindow("current patches", "patching options")
	dwin.win.Custom = func() {
		log.Info("test delete window here")
		dwin.win.Hide()
		// dwin = nil
	}
	grid := dwin.win.Group.RawGrid()

	grid.NewLabel(fmt.Sprintf("%d", patches.Len()))
	grid.NewLabel(fmt.Sprintf("total patches"))
	grid.NextRow()

	repomap := make(map[string]int)
	all := patches.All()
	for all.Scan() {
		patch := all.Next()
		repomap[patch.Namespace] += 1
	}
	grid.NewLabel(fmt.Sprintf("%d", len(repomap)))
	grid.NewLabel(fmt.Sprintf("total repos"))
	grid.NextRow()

	grid.NewButton("Update", func() {
		log.Info("TODO: doesn't update this window")
		me.forge.GetPatches()
		dwin.win.Custom()
		// loadUpstreamPatchsets()
	})

	grid.NewButton("Apply All", func() {
		var count int
		all := patches.SortByFilename()
		for all.Scan() {
			p := all.Next()
			applyPatchNew(p)
			/*
				rn := p.Namespace
				repo := me.forge.FindByGoPath(rn)
				if repo == nil {
					log.Info("Could not figure out repo path", rn)
					return
				}
				count += 1
				if _, err := applyAndTrackPatch(repo, p); err != nil {
					cmd := []string{"git", "am", "--abort"}
					err := repo.RunVerbose(cmd)
					log.Info("warn user of git am error", err)
					return
				}
			*/
		}
		log.Info("ALL PATCHES WORKED! count =", count)
	})

	// make a box at the bottom of the window for the protobuf table
	dwin.box = dwin.win.Bottom.Box().SetProgName("TBOX")

	if patches != nil {
		dwin.doPatchesTable(patches)
	}

	return dwin
}

func applyPatchNew(p *forgepb.Patch) error {
	rn := p.Namespace
	repo := me.forge.FindByGoPath(rn)
	if repo == nil {
		log.Info("Could not figure out repo path", rn)
		return log.Errorf("%s namespace?\n", rn)
	}
	if _, err := applyAndTrackPatch(repo, p); err != nil {
		cmd := []string{"git", "am", "--abort"}
		err := repo.RunVerbose(cmd)
		log.Info("warn user of git am error", err)
		return err
	}
	return nil
}

func (dwin *stdPatchTableWin) doPatchesTable(currentPatches *forgepb.Patches) {
	dwin.Lock()
	defer dwin.Unlock()
	if dwin.TB != nil {
		dwin.TB.Delete()
		dwin.TB = nil
	}

	// display the protobuf
	dwin.TB = AddPatchesPB(dwin.box, currentPatches)
	f := func(p *forgepb.Patch) {
		log.Info("do something with patch", p.Filename)
	}
	dwin.TB.Custom(f)
}

// used by the PB table
func applyPatchLabel(p *forgepb.Patch) string {
	rn := p.Namespace
	if repo := me.forge.FindByGoPath(rn); repo == nil {
		// log.Info("Could not figure out repo path", rn)
		return ""
	}
	if p.NewHash == "na" {
		return "git am"
	}
	if p.NewHash == "" {
		return "new"
	}
	return "done"
}

func applyPatchClick(p *forgepb.Patch) {
	if err := applyPatchNew(p); err != nil {
		log.Info("git am failed on file", p.Filename, "with error", err)
		return
	}
	log.Info("ran: git am", p.Filename, "ok")
}

// define what rows to have in the protobuf table
func AddPatchesPB(tbox *gui.Node, pb *forgepb.Patches) *forgepb.PatchesTable {
	t := pb.NewTable("PatchesPB")
	t.NewUuid()
	t.SetParent(tbox)

	gitam := t.AddButtonFunc("apply", applyPatchLabel)
	gitam.Custom = applyPatchClick

	t.AddCommitHash()
	t.AddNamespace()
	// t.AddFilename()
	t.AddStringFunc("file", func(p *forgepb.Patch) string {
		_, fname := filepath.Split(p.Filename)
		return fname
	})
	t.AddCommitHash()

	t.ShowTable()
	return t
}

func applyPatch(repo *gitpb.Repo, filename string) error {
	cmd := []string{"git", "am", filename}
	err := repo.RunVerbose(cmd)
	return err
}

func savePatch(p *forgepb.Patch) (string, error) {
	_, filen := filepath.Split(p.Filename)
	tmpname := filepath.Join("/tmp", filen)
	log.Info("saving as", tmpname, p.Filename)
	raw, err := os.OpenFile(tmpname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
	if err != nil {
		return "", err
	}
	raw.Write(p.Data)
	raw.Close()

	return tmpname, nil
}

func applyAndTrackPatch(repo *gitpb.Repo, p *forgepb.Patch) (string, error) {
	_, filen := filepath.Split(p.Filename)
	tmpname := filepath.Join("/tmp", filen)
	log.Info("saving as", tmpname, p.Filename)
	raw, err := os.OpenFile(tmpname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
	if err != nil {
		return "", err
	}
	raw.Write(p.Data)
	raw.Close()

	cmd := []string{"git", "am", tmpname}
	err = repo.RunVerbose(cmd)
	if err != nil {
		log.Info("git am failed. run 'git am --abort' here")
		return "", log.Errorf("git am failed")
	}

	log.Info("Try to find hash value now")

	p.NewHash = "fixme applyAndTrack"
	if setNewHash(p, p.NewHash) {
		log.Info("setting NewHash worked", p.NewHash)
	}
	me.forge.SavePatchsets()

	return p.NewHash, log.Errorf("did not lookup new hash")
}

func setNewHash(p *forgepb.Patch, hash string) bool {
	for pset := range me.forge.Patchsets.IterAll() {
		for patch := range pset.Patches.IterAll() {
			if patch.CommitHash == hash {
				patch.NewHash = hash
				log.Info("found patch in repo")
				me.forge.SavePatchsets()
				return true
			}
		}
	}
	return false
}