package ui

import (
	"strings"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/dialog"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
	"gitea.mmo.to/ProtocolPacketForger/ppf/protocol"
	"gitea.mmo.to/ProtocolPacketForger/ppf/protocolctl"
)

type Representationer interface {
	Representation() *fyne.Container
}

type FileHandler interface {
	Name() string
	Path() string
	Open(path string) error
	Save() error
	SaveAs(path string) error
	Close() error

	Changed()
	HasChanged() bool
}

type ppfApp struct {
	App    fyne.App
	Window fyne.Window
	// Container for the main layout, toolbar at top, in Center the doctabs.
	MainContainer *fyne.Container
	// toolbar
	Toolbar fyne.CanvasObject
	// left optional the local/remote library
	// tbd
	// center opened objects
	OpenTabs    *container.DocTabs // DocTabs
	OpenObjects []*FileHandler     // actual files

	// Global important stuff
	Settings map[string]interface{}

	/*/ will be part of the Editor
	Metadata    *Metadata
	Extensions  *fyne.Container
	ContextBar  *fyne.Container
	ContentTabs *fyne.Container
	Workarea    *container.DocTabs
	// Once initialized metadata containers for swapping
	ProtocolMeta *ProtocolMetadata
	PacketMeta   *PacketMetadata
	// Once initialized instances of the editor views
	EditorPacket   *PacketEditor
	EditorProtocol *ProtocolEditor
	// workspace handling
	OpenProtocolFiles []*ProtocolFileHandler//*/
}

var PPF ppfApp

func NewPPF(fyneApp fyne.App, w fyne.Window) ppfApp {
	PPF.App = fyneApp
	PPF.Window = w
	PPF.Toolbar = CreateToolbar(fyneApp)
	/*PPF.Workarea = CreateWorkarea()
	PPF.Extensions = container.NewCenter()
	PPF.ProtocolMeta = NewMetadataProtocol()
	PPF.Metadata = &PPF.ProtocolMeta.Metadata
	PPF.ContextBar = container.NewCenter() //*/
	return PPF
}

func (ppf *ppfApp) GetContainer() *fyne.Container {
	return container.NewBorder(
		PPF.Toolbar,
		nil, //PPF.ContextBar,
		nil, //PPF.Metadata.Representation,
		nil, //PPF.Extensions,
		PPF.OpenTabs,
	)
}

func (ppf *ppfApp) OpenFile(path string) {
	pfh := LoadProtocolFileHandler(path)
	ppf.OpenProtocolFiles = append(PPF.OpenProtocolFiles, pfh)
	ppf.Workarea.Append(container.NewTabItem(pfh.Filename, pfh.GetWorkarea()))
}

func (ppf *ppfApp) NewFile() {
	//TODO: show entry screen with choosable ways of:
	// PROTOCOL editor
	// create a new protocol
	// edit an existing protocol
	// PACKET editor
	// create a binary packet
	// edit an existing binary packet
	pfh := NewProtocolFileHandler()
	PPF.OpenProtocolFiles = append(PPF.OpenProtocolFiles, pfh)
	ppf.Workarea.Append(container.NewTabItem(pfh.Filename, pfh.GetWorkarea()))
}

func (ppf *ppfApp) SaveFile(path string) {
	item := ppf.Workarea.Selected()
	for _, pfh := range ppf.OpenProtocolFiles {
		if pfh.Filename == item.Text {
			protocolctl.Save(pfh.ProtocolEditor.Reference, path)
		}
	}
	item.Text = path
	ppf.Workarea.Refresh()
}

func (ppf *ppfApp) GetReferenceForFile(s string) *protocol.ProtocolStructure {
	for _, pfh := range ppf.OpenProtocolFiles {
		if pfh.Filename == s {
			return pfh.ProtocolEditor.Reference
		}
	}
	return nil
}

func CreateToolbar(fyneApp fyne.App) fyne.CanvasObject {
	toolbar := widget.NewToolbar()
	toolbar.Append(widget.NewToolbarAction(theme.ContentAddIcon(), func() {
		PPF.NewFile()
	}))
	toolbar.Append(widget.NewToolbarAction(theme.FolderOpenIcon(), func() {
		dialog.NewFileOpen(func(uri fyne.URIReadCloser, err error) {
			if uri == nil {
				return
			}
			PPF.OpenFile(uri.URI().Path())
		}, PPF.Window).Show()
	}))
	toolbar.Append(widget.NewToolbarAction(theme.DocumentSaveIcon(), func() {
		if strings.HasPrefix(PPF.Workarea.Selected().Text, "*new") {
			dialog.NewFileSave(func(uri fyne.URIWriteCloser, err error) {
				if uri == nil {
					return
				}
				PPF.SaveFile(uri.URI().Path())
			}, PPF.Window).Show()
		} else {
			PPF.SaveFile(PPF.Workarea.Selected().Text)
		}
	}))
	toolbar.Append(widget.NewToolbarAction(theme.StorageIcon(), func() {
		dialog.NewFileSave(func(uri fyne.URIWriteCloser, err error) {
			if uri == nil {
				return
			}
			PPF.SaveFile(uri.URI().Path())
		}, PPF.Window).Show()
	}))

	toolbar.Append(widget.NewToolbarAction(theme.SettingsIcon(), func() {

	}))
	toolbar.Append(widget.NewToolbarSpacer())
	toolbar.Append(widget.NewToolbarAction(theme.LogoutIcon(), func() {
		fyneApp.Quit()
	}))

	return toolbar
}

func CreateWorkarea() *container.DocTabs {
	tabs := container.NewDocTabs()
	tabs.OnClosed = func(ti *container.TabItem) {
		if len(tabs.Items) == 0 {
			PPF.Metadata.Representation.Hide()
		}
	}
	tabs.OnSelected = func(ti *container.TabItem) {
		PPF.ProtocolMeta.SetProtocol(PPF.GetReferenceForFile(ti.Text))
		PPF.Metadata = &PPF.ProtocolMeta.Metadata
		PPF.Metadata.Representation.Refresh()
		PPF.Metadata.Representation.Show()
	}
	return tabs
}