package ui

import (
	"git.bullercodeworks.com/brian/wandle"
	"git.bullercodeworks.com/brian/widdles"
	"github.com/nsf/termbox-go"
)

/*
 * A widdle to prompt the user for a tag key and value
 */
type PromptForTagWiddle struct {
	active     bool
	x, y, w, h int

	origKey, origVal string

	keyInput *widdles.ToggleField
	valInput *widdles.ToggleField

	cancelButton *widdles.Button
	doneButton   *widdles.Button

	multipleValues bool

	msg string
}

var _ widdles.Widdle = (*PromptForTagWiddle)(nil)

func NewPromptForTagWiddle(x, y, w, h int, key, val string) *PromptForTagWiddle {
	keyInp := widdles.NewToggleField("Key", key, 0, 0, 0, 0)
	keyInp.SetActive(true)
	return &PromptForTagWiddle{
		x: x, y: y, w: w, h: h,
		origKey: key, origVal: val,
		keyInput:     keyInp,
		valInput:     widdles.NewToggleField("Value", val, 0, 0, 0, 0),
		cancelButton: widdles.NewButton("Cancel", 0, 0, 0, 0),
		doneButton:   widdles.NewButton("Done", 0, 0, 0, 0),
	}
}

func (w *PromptForTagWiddle) Init() wandle.Cmd {
	return func() wandle.Msg {
		w.Measure()
		return nil
	}
}
func (w *PromptForTagWiddle) Update(msg wandle.Msg) wandle.Cmd {
	if w.active {
		// Make sure a widdle is active
		var found bool
		for _, wdl := range []widdles.Widdle{w.keyInput, w.valInput, w.cancelButton, w.doneButton} {
			if wdl.IsActive() {
				found = true
				break
			}
		}
		if !found {
			w.keyInput.SetActive(true)
		}
		if msg, ok := msg.(termbox.Event); ok {
			return w.handleTermboxEvent(msg)
		}
	}
	return nil
}
func (w *PromptForTagWiddle) View(style wandle.Style) {
	title := "Add Tag"
	if w.origKey != "" {
		title = "Edit Tag"
	}
	wandle.TitledBorderFilled(title, w.x, w.y, w.x+w.w, w.y+w.h, style, wandle.BRD_CSIMPLE)
	w.keyInput.View(style)
	w.valInput.View(style)
	if w.multipleValues {
		red := wandle.NewStyle(
			termbox.RGBToAttribute(uint8(200), uint8(0), uint8(0)),
			termbox.RGBToAttribute(uint8(0), uint8(0), uint8(0)),
		)
		wandle.Print(w.valInput.GetX(), w.valInput.GetY()+1, red, "Changing a tag on timers that have different values!")
	}
	w.cancelButton.View(style)
	w.doneButton.View(style)
	wandle.Print(w.x+1, w.y+w.h-2, style, w.msg)
}

func (w *PromptForTagWiddle) IsActive() bool   { return w.active }
func (w *PromptForTagWiddle) SetActive(b bool) { w.active = b }
func (w *PromptForTagWiddle) Focusable() bool  { return true }
func (w *PromptForTagWiddle) SetX(x int) {
	w.x = x
	w.Measure()
}
func (w *PromptForTagWiddle) GetX() int { return w.x }
func (w *PromptForTagWiddle) SetY(y int) {
	w.y = y
	w.Measure()
}
func (w *PromptForTagWiddle) GetY() int { return w.y }
func (w *PromptForTagWiddle) SetHeight(h int) {
	w.h = h
	w.Measure()
}
func (w *PromptForTagWiddle) GetHeight() int {
	//if w.h == widdles.AUTO_SIZE { }
	return w.h
}
func (w *PromptForTagWiddle) SetWidth(v int) {
	w.w = v
	w.Measure()
}
func (w *PromptForTagWiddle) GetWidth() int {
	//if w.w == widdles.AUTO_SIZE { }
	return w.w
}
func (w *PromptForTagWiddle) Measure() {
	w.keyInput.SetX(w.x + 1)
	w.keyInput.SetY(w.y + 1)
	w.keyInput.SetWidth(w.w - 2)
	w.keyInput.SetHeight(1)

	w.valInput.SetX(w.x + 1)
	w.valInput.SetY(w.y + 2)
	w.valInput.SetWidth(w.w - 2)
	w.valInput.SetHeight(1)

	w.doneButton.SetX(w.x + w.w - 9)
	w.doneButton.SetY(w.y + w.h - 1)
	w.doneButton.SetWidth(8)
	w.doneButton.SetHeight(1)

	w.cancelButton.SetX(w.doneButton.GetX() - 12)
	w.cancelButton.SetY(w.y + w.h - 1)
	w.cancelButton.SetWidth(10)
	w.cancelButton.SetHeight(1)
}
func (w *PromptForTagWiddle) SetPos(x, y int)      { w.x, w.y = x, y }
func (w *PromptForTagWiddle) SetSize(wdt, hgt int) { w.w, w.h = wdt, hgt }

func (w *PromptForTagWiddle) handleTermboxEvent(msg termbox.Event) wandle.Cmd {
	if msg.Key == termbox.KeyEsc {
		w.Done()
		return wandle.EmptyCmd
	} else if msg.Key == termbox.KeyEnter {
		if w.keyInput.IsEditable() {
			w.keyInput.SetActive(false)
			w.keyInput.SetEditable(false)
			w.valInput.SetActive(true)
			w.valInput.SetEditable(true)
			return wandle.EmptyCmd
		} else if w.valInput.IsEditable() {
			w.valInput.SetActive(false)
			w.valInput.SetEditable(false)
			if w.keyInput.GetValue() != "" && w.valInput.GetValue() != "" {
				w.doneButton.SetActive(true)
			} else {
				w.cancelButton.SetActive(true)
			}
			return wandle.EmptyCmd
		}
	}
	widdles := []widdles.Widdle{w.keyInput, w.valInput, w.cancelButton, w.doneButton}
	for _, wdl := range widdles {
		if wdl.IsActive() {
			if ret := wdl.Update(msg); ret != nil {
				return ret
			}
		}
	}
	if msg.Ch == 'j' || msg.Key == termbox.KeyArrowDown || msg.Key == termbox.KeyArrowRight {
		for i := range widdles {
			if widdles[i].IsActive() {
				return func() wandle.Msg {
					widdles[i].SetActive(false)
					next := ((i + 1) + len(widdles)) % len(widdles)
					widdles[next].SetActive(true)
					return nil
				}
			}
		}
	} else if msg.Ch == 'k' || msg.Key == termbox.KeyArrowUp || msg.Key == termbox.KeyArrowLeft {
		for i := range widdles {
			if widdles[i].IsActive() {
				return func() wandle.Msg {
					widdles[i].SetActive(false)
					next := ((i - 1) + len(widdles)) % len(widdles)
					widdles[next].SetActive(true)
					return nil
				}
			}
		}
	}
	return nil
}
func (w *PromptForTagWiddle) SetTag(key, val string) {
	w.origKey, w.origVal = key, val
	w.keyInput.SetValue(key)
	if key == "" && val == "" {
		w.keyInput.SetEditable(true)
	}
	w.valInput.SetValue(val)
}
func (w *PromptForTagWiddle) GetTag() (string, string) {
	return w.keyInput.GetValue(), w.valInput.GetValue()
}
func (w *PromptForTagWiddle) SetMultiVal(v bool) { w.multipleValues = v }

func (w *PromptForTagWiddle) ClearCancelCommand()                    { w.SetCancelCommand(wandle.EmptyCmd) }
func (w *PromptForTagWiddle) SetCancelCommand(cmd func() wandle.Msg) { w.cancelButton.SetCommand(cmd) }
func (w *PromptForTagWiddle) ClearDoneCommand()                      { w.SetDoneCommand(wandle.EmptyCmd) }
func (w *PromptForTagWiddle) SetDoneCommand(cmd func() wandle.Msg)   { w.doneButton.SetCommand(cmd) }

func (w *PromptForTagWiddle) Done() {
	w.origKey, w.origVal = "", ""
	w.multipleValues = false
	w.keyInput.SetValue("")
	w.valInput.SetValue("")
	w.ClearCancelCommand()
	w.ClearDoneCommand()
	w.SetActive(false)
}