package uiwidget

import (
	"fmt"
	"strings"

	"bitbucket.org/hevanto/ui/uilayout"
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/data/binding"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
)

// LabelOpts defines the options for a label.
type LabelOpts interface {
	ApplyTo(*widget.Label)
}

type allignmentOpt struct {
	Alignment fyne.TextAlign
}

// AlignmentOpt returns a LabelOpts with the specified alignment.
func AlignmentOpt(alignment fyne.TextAlign) LabelOpts {
	return &allignmentOpt{alignment}
}

// ApplyTo sets the alignment of a label to the specified alignment.
func (a *allignmentOpt) ApplyTo(lbl *widget.Label) {
	lbl.Alignment = a.Alignment
}

type wrappingOpt struct {
	Wrapping fyne.TextWrap
}

// WrappingOpt creates a LabelOpts with the specified text wrapping option.
func WrappingOpt(wrapping fyne.TextWrap) LabelOpts {
	return &wrappingOpt{wrapping}
}

// ApplyTo applies the wrapping option to the label.
func (w *wrappingOpt) ApplyTo(lbl *widget.Label) {
	lbl.Wrapping = w.Wrapping
}

type textStyleOpt struct {
	Style fyne.TextStyle
}

// TextStyleOpt returns the label options for the given text style.
func TextStyleOpt(style fyne.TextStyle) LabelOpts {
	return &textStyleOpt{style}
}

// ApplyTo applies the text style option to the label.
func (t *textStyleOpt) ApplyTo(lbl *widget.Label) {
	lbl.TextStyle = t.Style
}

type truncationOpt struct {
	Truncation fyne.TextTruncation
}

// TruncationOpt returns the label options for the given text truncation option.
func TruncationOpt(truncation fyne.TextTruncation) LabelOpts {
	return &truncationOpt{truncation}
}

// ApplyTo applies the text truncation option to the label.
func (t *truncationOpt) ApplyTo(lbl *widget.Label) {
	lbl.Truncation = t.Truncation
}

type importanceOpt struct {
	Importance widget.Importance
}

// ImportanceOpt returns the label options for the given text importance option.
func ImportanceOpt(importance widget.Importance) LabelOpts {
	return &importanceOpt{importance}
}

// ApplyTo applies the text importance option to the label.
func (i *importanceOpt) ApplyTo(lbl *widget.Label) {
	lbl.Importance = i.Importance
}

// NewLabel creates a new label widget with the given text and options.
//
// Arguments
// - text: the text to be displayed on the label.
// - opts: optional configuration options for the label.
//
// Returns *widget.Label: a pointer to the newly created label widget.
func NewLabel(text string, opts ...LabelOpts) *widget.Label {
	lbl := widget.NewLabel(text)
	for _, opt := range opts {
		opt.ApplyTo(lbl)
	}
	return lbl
}

// NewLabelWithData creates a new Label widget with the provided data and options.
//
// Arguments
// - data: The string data to be displayed on the label.
// - opts: Additional options to customize the label.
//
// Returns *widget.Label: a pointer to the newly created Label widget.
func NewLabelWithData(data binding.String, opts ...LabelOpts) *widget.Label {
	lbl := widget.NewLabelWithData(data)
	for _, opt := range opts {
		opt.ApplyTo(lbl)
	}
	return lbl
}

// NewUpDownLabelWithData creates a new label widget with up and down buttons.
//
// Arguments
// - data: the string data to display in the label.
// - upHandler: the function to call when the up button is clicked.
// - downHandler: the function to call when the down button is clicked.
//
// Returns fyne.CanvasObject: the created widget.
func NewUpDownLabelWithData(
	minSize *fyne.Size,
	data binding.String,
	upHandler func(),
	downHandler func(),
) fyne.CanvasObject {
	c2 := container.NewWithoutLayout()
	w := NewWidgetBorder(
		widget.NewLabelWithData(data),
	)
	bu := widget.NewButtonWithIcon("", theme.MoveUpIcon(), upHandler)
	bd := widget.NewButtonWithIcon("", theme.MoveDownIcon(), downHandler)
	w.Resize(fyne.NewSize(100, w.MinSize().Height))
	c2.Move(fyne.NewPos(w.Size().Width, 0))
	bu.Resize(fyne.NewSize(30, w.Size().Height*0.5))
	bd.Resize(fyne.NewSize(30, w.Size().Height*0.5))
	bd.Move(fyne.NewPos(0, w.Size().Height*0.5))
	c2.Add(bu)
	c2.Add(bd)

	if minSize == nil {
		minSize = &fyne.Size{Width: 100, Height: 0}
	}
	return container.NewHBox(
		container.New(uilayout.NewMinSizeLayout(*minSize),
			w), c2)
}

// NewH creates a RichText widget formatted as a header of the provided level.
//
// Parameters:
// - level: an integer representing the level of the text.
// - text: a string containing the text to display.
//
// Returns a pointer to a RichText widget.
func NewH(level int, text string) *widget.RichText {
	return widget.NewRichTextFromMarkdown(
		fmt.Sprintf("%s %s", strings.Repeat("#", level), text))
}

// NewHWithData creates a new RichText widget formatted as a header of the provided level.
//
// Parameters:
// - level: an integer representing the level of the text.
// - data: a string binding containing the text to display.
//
// Returns a pointer to a RichText widget.
func NewHWithData(level int, data binding.String) *widget.RichText {
	txt, _ := data.Get()
	w := NewH(level, txt)
	data.AddListener(binding.NewDataListener(func() {
		txt, _ := data.Get()
		w.ParseMarkdown(fmt.Sprintf("%s %s", strings.Repeat("#", level), txt))
	}))
	return w
}

// NewH1 creates a new RichText widget with header level 1.
func NewH1(text string) *widget.RichText {
	return NewH(1, text)
}

// NewH1WithData creates a new RichText widget with header level 1.
func NewH1WithData(data binding.String) *widget.RichText {
	return NewHWithData(1, data)
}

// NewH2 creates a new RichText widget with header level 2.
func NewH2(text string) *widget.RichText {
	return NewH(2, text)
}

// NewH2WithData creates a new RichText widget with header level 2.
func NewH2WithData(data binding.String) *widget.RichText {
	return NewHWithData(2, data)
}

// NewH3 creates a new RichText widget with header level 3.
func NewH3(text string) *widget.RichText {
	return NewH(3, text)
}

// NewH3WithData creates a new RichText widget with header level 3.
func NewH3WithData(data binding.String) *widget.RichText {
	return NewHWithData(3, data)
}

// NewH4 creates a new RichText widget with header level 4.
func NewH4(text string) *widget.RichText {
	return NewH(4, text)
}

// NewH4WithData creates a new RichText widget with header level 4.
func NewH4WithData(data binding.String) *widget.RichText {
	return NewHWithData(4, data)
}

// NewH5 creates a new RichText widget with header level 5.
func NewH5(text string) *widget.RichText {
	return NewH(5, text)
}

// NewH5WithData creates a new RichText widget with header level 5.
func NewH5WithData(data binding.String) *widget.RichText {
	return NewHWithData(5, data)
}

// NewH6 creates a new RichText widget with header level 6.
func NewH6(text string) *widget.RichText {
	return NewH(6, text)
}

// NewH6WithData creates a new RichText widget with header level 6.
func NewH6WithData(data binding.String) *widget.RichText {
	return NewHWithData(6, data)
}