/*
Copyright © Brian Buller <brian@bullercodeworks.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package app

import (
	"fmt"
	"net/url"
	"strings"

	"git.bullercodeworks.com/brian/expds/data"
	"git.bullercodeworks.com/brian/expds/data/models"
	wd "git.bullercodeworks.com/brian/expds/widgets"
	w "git.bullercodeworks.com/brian/tcell-widgets"
	"github.com/bluesky-social/indigo/atproto/syntax"
	"github.com/gdamore/tcell"
	"github.com/skratchdot/open-golang/open"
	"github.com/spf13/viper"
	"golang.design/x/clipboard"
)

type ScreenHome struct {
	a     *App
	r     *data.Repo
	w, h  int
	style tcell.Style

	alert     *w.Alert
	showAlert bool

	menuLayout *w.TopMenuLayout

	openPdsEntry *w.Field

	layout  *w.LinearLayout
	columns *w.LinearLayout

	activePds   *models.Pds
	pdsListing  *wd.TreeBrowser
	jsonContent *wd.JsonContent
	status      *wd.StatusBar
	stPathBlock *wd.StatusBlock

	cli *w.Cli

	doOpen    bool
	isLoading bool
	loading   *w.Spinner

	cursor int
}

func (s *ScreenHome) Init(a *App) {
	s.a, s.r = a, a.repo
	s.r.SetLogFunc(s.Log)

	s.style = a.style

	s.alert = w.NewAlert("expds.alert", s.style)

	s.openPdsEntry = w.NewField("home.openpds.field", s.style)
	s.openPdsEntry.SetLabel("ID")
	s.openPdsEntry.SetActive(true)
	s.openPdsEntry.SetPos(w.Coord{X: 3, Y: 1})
	s.openPdsEntry.SetSize(w.Coord{X: 20, Y: 1})
	s.doOpen = true

	s.isLoading = false
	s.loading = w.NewSpinner("home.loading", s.style)
	s.loading.SetVisible(true)
	s.loading.SetPos(w.Coord{X: 2, Y: 1})

	s.menuLayout = w.NewTopMenuLayout("home.toplayout", s.style)
	s.initMenu()

	s.cli = w.NewCli("home.cli", s.style)
	s.initCli()
	s.cli.SetVisible(false)

	s.layout = w.NewLinearLayout("home.layout", s.style)

	s.columns = w.NewLinearLayout("home.layout.columns", s.style)
	s.columns.SetOrientation(w.LinLayH)

	//s.pdsListing = w.NewSimpleListWithHelp("pdslisting", s.style)
	s.pdsListing = wd.NewTreeBrowser("pdslisting", s.style)
	s.pdsListing.SetBorder([]rune{'─', '┬', '│', '┴', '─', '└', '│', '┌', '├', '─', '┤', '┬', '│', '┴', '┼'})

	s.pdsListing.SetTitle(strings.Repeat(" ", 30))
	s.pdsListing.SetOnSelect(s.selectPdsListingEntry)
	s.pdsListing.SetOnChange(s.changePdsList)
	s.pdsListing.SetVimMode(viper.GetBool(data.KeyVimMode))
	s.pdsListing.SetLogger(s.Log)

	s.jsonContent = wd.NewJsonContent("jsoncontent", s.style)
	km := s.jsonContent.GetKeyMap()
	km.Add(
		w.NewKey(w.BuildEK(tcell.KeyEnter), func(ev *tcell.EventKey) bool {
			// Init returns an error if the package is not ready for use.
			err := clipboard.Init()
			if err != nil {
				s.Log("Error initializing clipboard: %s", err.Error())
				return true
			}
			clipboard.Write(clipboard.FmtText, []byte(s.jsonContent.GetSelectedValue()))
			return true
		}),
		w.NewKey(w.BuildEKr('O'), func(ev *tcell.EventKey) bool {
			url := fmt.Sprintf("https://%s/xrpc/com.atproto.sync.getBlob?did=did:plc:pqwuemo2ic5tqmpwrajb2phi&cid=%s", s.activePds.AtId.String(), s.jsonContent.GetSelectedValue())
			open.Run(url)
			return true
		}),
	)
	s.jsonContent.SetKeyMap(km)
	s.jsonContent.SetBorder(
		[]rune{'─', '┐', '│', '┘', '─', '─', ' ', '─', '├', '─', '┤', '┬', '│', '┴', '┼'},
	)

	statusStyle := s.style.Background(tcell.ColorDarkSlateGray)
	s.status = wd.NewStatusBar("home.statusbar", statusStyle)
	s.status.SetPos(w.Coord{X: 0, Y: s.a.GetH() - 1})
	s.status.SetLogger(s.Log)
	s.stPathBlock = wd.NewStatusBlock("home.statusbar.block", statusStyle.Foreground(tcell.ColorDarkSlateGray).Background(tcell.ColorOrange))
	s.stPathBlock.SetType(wd.SBTypePath)
	s.stPathBlock.SetParts([]string{"No PDS Loaded"})
	s.status.Add(s.stPathBlock)

	s.columns.AddAll(s.pdsListing, s.jsonContent)

	s.layout.AddAll(s.columns)
	s.layout.SetLogger(s.Log)
	s.layout.SetWeight(s.columns, 4)
	s.menuLayout.SetWidget(s.layout)
	s.layout.SetLogger(s.Log)
	s.columns.SetLogger(s.Log)
}

func (s *ScreenHome) GetName() string { return "home" }
func (s *ScreenHome) HandleResize(ev *tcell.EventResize) {
	s.w, s.h = ev.Size()
	s.menuLayout.HandleResize(w.Coord{X: s.w, Y: s.h - 1}.ResizeEvent())
	s.alert.HandleResize(ev)

	s.status.SetPos(w.Coord{X: 0, Y: s.h - 1})
	s.status.HandleResize(w.Coord{X: s.w, Y: 1}.ResizeEvent())
}

func (s *ScreenHome) HandleKey(ev *tcell.EventKey) bool {
	if s.showAlert {
		handled := s.alert.HandleKey(ev)
		s.alert.SetMessage(fmt.Sprintf("Alert Handled? %v -> %s", handled, ev.Name()))
		return handled
	}
	if ev.Key() == tcell.KeyF12 {
		s.toggleCli()
		return true
	}
	m := s.menuLayout.Menu()
	if ev.Key() == tcell.KeyEscape {
		return s.menuLayout.HandleKey(ev)
	} else if m.Active() {
		return s.menuLayout.HandleKey(ev)
	}

	if s.doOpen {
		if ev.Key() == tcell.KeyCtrlU {
			s.openPdsEntry.SetValue("")
			return true
		}

		if ev.Key() == tcell.KeyEnter {
			return s.cliGetPds("getpds", s.openPdsEntry.Value())
		}
		return s.openPdsEntry.HandleKey(ev)
	}

	return s.menuLayout.HandleKey(ev)
}
func (s *ScreenHome) HandleTime(ev *tcell.EventTime) {
	s.menuLayout.HandleTime(ev)
	s.loading.HandleTime(ev)
	s.status.HandleTime(ev)
}
func (s *ScreenHome) Draw() {
	if s.doOpen {
		s.menuLayout.SetStyle(s.style.Foreground(tcell.ColorGray))
	}
	s.menuLayout.SetStyle(s.style)
	m := s.menuLayout.Menu()
	s.a.DrawWidget(s.menuLayout)
	if s.doOpen && !m.Active() {
		s.a.DrawWidget(s.openPdsEntry)
	}

	// These are outside of the menuLayout
	if s.isLoading {
		s.a.DrawWidget(s.loading)
	}
	s.a.DrawWidget(s.status)
	if s.showAlert {
		s.a.DrawWidget(s.alert)
	}
}
func (s *ScreenHome) Exit() error { return nil }
func (s *ScreenHome) Log(t string, a ...any) {
	s.cli.Log(t, a...)
	s.showCli()
}

func (s *ScreenHome) initMenu() {
	s.menuLayout.SetActive(true)
	wrk := "[ ]"
	if viper.GetBool(data.KeyVimMode) {
		wrk = "[X]"
	}
	vimText := fmt.Sprintf("%s Vim Mode", wrk)
	wrk = "[ ]"
	if viper.GetBool(data.KeyRecNmInfer) {
		wrk = "[X]"
	}
	inferRecNm := fmt.Sprintf("%s Infer Record Names", wrk)
	s.menuLayout.AddMenuItems(
		s.menuLayout.CreateMenuItem("file", "File", nil, 'f',
			s.menuLayout.CreateMenuItem("file.openpds", "Open PDS", func() bool {
				s.menuLayout.ToggleMenu()
				s.doOpen = true
				s.pdsListing.SetTitle(strings.Repeat(" ", 30))
				return true
			}, 'o'),
			s.menuLayout.CreateMenuItem("file.reloadpds", "Reload PDS", func() bool {
				s.menuLayout.ToggleMenu()
				if s.activePds == nil {
					return false
				}
				return s.cliGetPds("getpds", s.activePds.AtId.String())
			}, 'r'),
			s.menuLayout.CreateMenuItem("file.exit", "Exit", func() bool {
				s.a.Exit()
				return true
			}, 'x'),
		),
		s.menuLayout.CreateMenuItem("settings", "Settings", nil, 's',
			s.menuLayout.CreateMenuItem("settings.vimmode", vimText, func() bool {
				s.menuLayout.ToggleMenu()
				viper.Set(data.KeyVimMode, !viper.GetBool(data.KeyVimMode))
				viper.WriteConfig()
				s.update()
				return true
			}, 'v'),
			s.menuLayout.CreateMenuItem("settings.inferrecnm", inferRecNm, func() bool {
				s.menuLayout.ToggleMenu()
				viper.Set(data.KeyRecNmInfer, !viper.GetBool(data.KeyRecNmInfer))
				viper.WriteConfig()
				s.update()
				return true
			}, 'r'),
		),
	)
}

func (s *ScreenHome) update() {
	if s.doOpen {
		s.menuLayout.SetWidget(s.openPdsEntry)
	} else {
		s.menuLayout.SetWidget(s.layout)
	}
	s.pdsListing.SetVimMode(viper.GetBool(data.KeyVimMode))
	s.jsonContent.SetVimMode(viper.GetBool(data.KeyVimMode))
	vimMI := s.menuLayout.FindItem("settings.vimmode")
	wrk := "[ ]"
	if viper.GetBool(data.KeyVimMode) {
		wrk = "[X]"
	}
	vimMI.SetLabel(fmt.Sprintf("%s Vim Mode", wrk))
	recNmInf := s.menuLayout.FindItem("settings.inferrecnm")
	wrk = "[ ]"
	if viper.GetBool(data.KeyRecNmInfer) {
		wrk = "[X]"
	}
	recNmInf.SetLabel(fmt.Sprintf("%s Infer Record Names", wrk))

	miReload := s.menuLayout.FindItem("file.reloadpds")
	if s.activePds == nil {
		miReload.SetDisabled(true)
		miReload.SetStyle(s.style.Foreground(tcell.ColorGray))
	} else {
		miReload.SetDisabled(false)
		miReload.SetStyle(s.style.Foreground(tcell.ColorLime))
	}
}

func (s *ScreenHome) initCli() {
	s.cli.SetVisible(true)
	s.cli.AddCommand(w.NewCliCommand("getpds", s.cliGetPds))
	s.cli.AddCommand(w.NewCliCommand("authpds", s.cliAuthPds))
	s.cli.AddCommand(w.NewCliCommand("backuppds", s.cliBackupPds))
	s.cli.AddCommand(w.NewCliCommand("sendstatus", s.cliSendStatus))
}

func (s *ScreenHome) toggleCli() {
	if s.layout.Contains(s.cli) {
		s.layout.Delete(s.cli)
	} else {
		s.layout.Add(s.cli)
		s.cli.SetVisible(true)
	}
}
func (s *ScreenHome) hideCli() {
	s.cli.SetVisible(false)
	if s.layout.Contains(s.cli) {
		s.layout.Delete(s.cli)
	}
}
func (s *ScreenHome) showCli() {
	s.cli.SetVisible(true)
	if !s.layout.Contains(s.cli) {
		s.layout.Add(s.cli)
	}
}

func (s *ScreenHome) cliGetPds(args ...string) bool {
	s.isLoading = true
	if len(args) < 1 {
		s.Log("No id given.")
		s.Log("Usage: 'getpds <atproto id>'")
		s.isLoading = false
		return true
	}
	go func() {
		defer func() { s.isLoading = false }()
		pds, err := s.r.GetPDS(args[1])
		if err != nil {
			s.Log(err.Error())
			return
		} else if pds == nil {
			s.Log("PDS (%s) Not Found.", args[1])
			return
		}
		s.doOpen = false
		s.cli.Log("Retrieved: %s (%s)", pds.AtId, pds.Did)
		s.activePds = pds
		s.updatePdsListing()
		n, err := s.pdsListing.GetActiveNode()
		if err == nil && n != nil {
			s.changePdsList(n)
		}

		s.layout.ActivateWidget(s.columns)
		s.columns.ActivateWidget(s.pdsListing)
	}()
	return true
}

func (s *ScreenHome) cliAuthPds(args ...string) bool {
	if s.activePds == nil {
		s.Log("No active PDS.")
		return true
	}
	s.isLoading = true
	go func() {
		defer func() { s.isLoading = false }()
		atid := s.activePds.AtId.String()
		callbackRes := make(chan url.Values, 1)
		listenPort, err := s.r.Auth.ListenForCallback(callbackRes)
		if err != nil {
			s.Log("Error Instantiating HTTP Server for Callback: %w", err)
			return
		}
		s.Log("Listening on %d", listenPort)
		var authUrl string
		authUrl, err = s.r.Auth.StartAuthFlow(listenPort, atid, callbackRes)
		if err != nil {
			s.Log("Error starting auth flow: %w", err)
		}
		s.alert.SetTitle("Authentication Started")
		s.alert.SetMessage(fmt.Sprintf("OAuth Process Started.\nIf a browser window didn't open, you can open this URL manually:\n%s", authUrl))
		s.alert.SetVisible(true)
		s.alert.SetActive(true)
		s.showAlert = true
	}()
	return true
}

func (s *ScreenHome) cliBackupPds(args ...string) bool {
	if s.activePds == nil {
		s.Log("No active PDS.")
		return true
	}
	s.isLoading = true
	go func() {
		defer func() { s.isLoading = false }()
		nm, sz, err := s.activePds.Backup()
		if err != nil {
			s.Log("Error: %w", err)
			return
		}
		s.Log("Backup Created: %s (%d bytes)", nm, sz)
	}()
	return true
}

func (s *ScreenHome) cliSendStatus(args ...string) bool {
	if s.activePds == nil {
		s.Log("No active PDS.")
		return true
	}
	s.isLoading = true
	go func() {
		defer func() { s.isLoading = false }()
		if !s.r.Auth.HasAuth() {
			s.Log("Not authorized. Run `authpds`")
			return
		}
		s.r.SendToPDS()
	}()
	return true
}

func (s *ScreenHome) updatePdsListing() {
	s.pdsListing.SetTitle(fmt.Sprintf("─ %s (%s)", s.activePds.AtId.String(), s.activePds.Did.String()))
	s.pdsListing.Clear()
	nsidList := s.activePds.NSIDStringList()
	for i, v := range nsidList {
		t := wd.NewTreeNode(v, v)
		nsid := s.activePds.NSIDs[i]
		rIds := s.activePds.GetRecordIdsFor(nsid)
		for j := range rIds {
			label := rIds[j]
			if viper.GetBool(data.KeyRecNmInfer) {
				if rec, ok := s.activePds.Records[rIds[j]]; ok {
					for k := range rec {
						if k == "name" || k == "title" || k == "label" || k == "displayName" {
							if f, ok := rec[k].(string); ok {
								label = fmt.Sprintf("%s (%s)", f, rIds[j])
								break
							}
						}
					}
				}
			}

			c := wd.NewTreeNode(label, rIds[j])
			t.AddChild(c)
		}
		s.pdsListing.Add(t)
	}
	s.layout.ActivateWidget(s.columns)
	s.columns.ActivateWidget(s.pdsListing)
	s.pdsListing.SetActive(true)
	s.pdsListing.SetFocusable(true)
	s.hideCli()
}

func (s *ScreenHome) selectPdsListingEntry(tn *wd.TreeNode) bool {
	if !s.updateJsonView(tn) {
		return false
	}
	if tn.HasChildren() {
		tn.ToggleExpand()
		s.pdsListing.UpdateList()
	} else {
		s.columns.ActivateWidget(s.jsonContent)
	}

	return true
}

func (s *ScreenHome) changePdsList(tn *wd.TreeNode) bool {
	upd := s.updateJsonView(tn)
	upd = s.updateStatusPathBlock(tn)
	return upd
}
func (s *ScreenHome) updateStatusPathBlock(tn *wd.TreeNode) bool {
	s.stPathBlock.SetParts(tn.GetLabelPath())
	return true
}

func (s *ScreenHome) updateJsonView(tn *wd.TreeNode) bool {
	// TODO: Update JSON View
	if tn.Depth() == 0 {
		nsid, err := syntax.ParseNSID(tn.Value())
		if err != nil {
			s.Log("error parsing NSID from %s: %w", tn.Value(), err)
			return false
		}
		recordIds := s.activePds.GetRecordIdsFor(nsid)
		s.jsonContent.SetValue(recordIds)
		return true
	} else {
		s.jsonContent.SetValue(s.activePds.Records[tn.Value()])
	}

	return true
}