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

package main

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

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

	"go.wit.com/gui"
)

type patchWindow struct {
	once  sync.Once            // only init() the window once
	win   *gadgets.BasicWindow // the patches window
	stack *gui.Node            // the top box set as vertical
	shelf *gui.Node            // the first box in the stack, set as horizontal
	grid  *gui.Node            // the list of available patches
	// summary *patchSummary        // summary of current patches
	setgrid *gui.Node         // the list of each patchset
	pset    *forgepb.Patchset // the patchset in question
}

// todo: autogenerate these or make them standared 'gui' package functions
// make this an go interface somehow

// is the window hidden right now?
func (w *patchWindow) Hidden() bool {
	return w.win.Hidden()
}

// switches between the window being visable or hidden on the desktop
func (w *patchWindow) Toggle() {
	if w.Hidden() {
		w.Show()
	} else {
		w.Hide()
	}
}

// hides the window completely
func (w *patchWindow) Show() {
	w.win.Show()
}

func (w *patchWindow) Hide() {
	w.win.Hide()
}

// should be the first box/widget in the window
// greys out the window to the user
func (w *patchWindow) Disable() {
	w.stack.Disable()
}

func (w *patchWindow) Enable() {
	w.stack.Enable()
}

// you can only have one of these
func makePatchWindow(pset *forgepb.Patchset) *patchWindow {
	pw := new(patchWindow)

	// sync.Once()
	pw.win = gadgets.RawBasicWindow("Patcheset for " + pset.Name + " (" + pset.Comment + ")")
	pw.win.Make()

	pw.stack = pw.win.Box().NewBox("bw vbox", false)
	// me.reposwin.Draw()
	pw.win.Custom = func() {
		// sets the hidden flag to false so Toggle() works
		pw.win.Hide()
	}

	grid := pw.stack.NewGrid("", 0, 0)

	grid.NewLabel("Patchset Details:")
	grid.NewLabel(pset.GitAuthorName)
	grid.NewLabel(pset.GitAuthorEmail)
	grid.NewLabel("start branch: " + pset.StartBranchName)
	grid.NewLabel(pset.StartBranchHash)
	grid.NewLabel("end branch: " + pset.EndBranchName)
	grid.NewLabel(pset.EndBranchHash)
	grid.NextRow()

	g := pw.stack.NewGroup("PatchSet List")

	// make a grid to put the list of git repos that have patches
	// in this particular patchset
	grid = g.NewGrid("", 0, 0)
	grid.NewLabel("repo")
	grid.NewLabel("patch name")
	grid.NewLabel("Applied in current branch?")
	grid.NewLabel("start hash")
	grid.NewLabel("")
	grid.NewButton("Extract", func() {
		if err := savePatchset(pset); err != nil {
			log.Info("Save err:", err)
			return
		}
	})
	grid.NewButton("Apply with git am", func() {
		if _, _, _, err := IsEverythingOnUser(); err != nil {
			log.Info("You can only apply patches to the user branch")
			return
		}
		if IsAnythingDirty() {
			log.Info("You can't apply patches when repos are dirty")
			me.forge.PrintHumanTable(me.found)
			return
		}
		if argv.Force {
			applyPatchset(pset)
		}
	})
	grid.NextRow()

	// add the patches to the grid
	pw.addPatchset(grid, pset)
	return pw
}

func (r *patchWindow) addPatchset(grid *gui.Node, pset *forgepb.Patchset) {
	repomap := make(map[*gitpb.Repo][]*forgepb.Patch)
	repohash := make(map[*gitpb.Repo]string)

	// sort patches by repo namespace
	all := pset.Patches.SortByFilename()
	for all.Scan() {
		p := all.Next()
		s := p.RepoNamespace
		repo := me.forge.FindByGoPath(s)
		if repo == nil {
			log.Info("Could not figure out repo path", s)
			continue
		}
		repomap[repo] = append(repomap[repo], p)
		repohash[repo] = p.StartHash
	}

	for repo, patches := range repomap {
		log.Info(repo.GetGoPath())
		grid.NewLabel(repo.GetGoPath())

		for i, p := range patches {
			log.Info(i, p.Filename)
			grid.NewLabel(p.Comment)
			grid.NewLabel("in current branch?")
			break
		}
		hash := repohash[repo]
		grid.NewLabel(hash)
		var win *repoPatchWindow
		grid.NewButton("View", func() {
			if win != nil {
				win.Toggle()
				log.Info("TRYING TO TOGGLE WINDOW")
				return
			}

			win = makeRepoPatchWindow(repo, patches)
			win.Show()
		})
		grid.NewCheckbox("").SetChecked(true)
		grid.NewCheckbox("").SetChecked(true)
		grid.NewButton("save", func() {
			for _, p := range patches {
				_, filen := filepath.Split(p.Filename)
				tmpname := filepath.Join("/tmp", filen)
				log.Info("saving as", tmpname, p.Filename)
				raw, _ := os.OpenFile(tmpname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
				raw.Write(p.Data)
				raw.Close()
			}
		})
		grid.NewButton("view hash", func() {
			cmd := []string{"git", "whatchanged", hash}
			log.Info(repo.GetFullPath(), cmd)
		})
		grid.NewButton("git am", func() {
			cmd := []string{"git", "whatchanged", hash}
			log.Info(repo.GetFullPath(), cmd)
		})
		grid.NextRow()
	}
}