package jenkins

import (
	"fmt"
	"github.com/gdamore/tcell"
	"github.com/rivo/tview"
	"github.com/wtfutil/wtf/wtf"
	"os"
	"strconv"
)

const HelpText = `
 Keyboard commands for Jenkins:

   /: Show/hide this help window
   j: Select the next job in the list
   k: Select the previous job in the list
   r: Refresh the data

   arrow down: Select the next job in the list
   arrow up:   Select the previous job in the list

   return: Open the selected job in a browser
`

type Widget struct {
	wtf.HelpfulWidget
	wtf.TextWidget

	view     *View
	selected int
}

func NewWidget(app *tview.Application, pages *tview.Pages) *Widget {
	widget := Widget{
		HelpfulWidget: wtf.NewHelpfulWidget(app, pages, HelpText),
		TextWidget:    wtf.NewTextWidget(app, "Jenkins", "jenkins", true),
	}

	widget.HelpfulWidget.SetView(widget.View)
	widget.unselect()

	widget.View.SetScrollable(true)
	widget.View.SetRegions(true)
	widget.View.SetInputCapture(widget.keyboardIntercept)

	return &widget
}

/* -------------------- Exported Functions -------------------- */

func (widget *Widget) Refresh() {
	if widget.Disabled() {
		return
	}

	view, err := Create(
		wtf.Config.UString("wtf.mods.jenkins.url"),
		wtf.Config.UString("wtf.mods.jenkins.user"),
		widget.apiKey(),
	)
	widget.view = view

	if err != nil {
		widget.View.SetWrap(true)
		widget.View.SetTitle(widget.ContextualTitle(widget.Name()))
		widget.View.SetText(err.Error())
	}

	widget.display()
}

/* -------------------- Unexported Functions -------------------- */

func (widget *Widget) display() {
	if widget.view == nil {
		return
	}

	widget.View.SetWrap(false)

	widget.View.Clear()
	widget.View.SetTitle(widget.ContextualTitle(fmt.Sprintf("%s: [red]%s", widget.Name(), widget.view.Name)))
	widget.View.SetText(widget.contentFrom(widget.view))
	widget.View.Highlight(strconv.Itoa(widget.selected)).ScrollToHighlight()
}

func (widget *Widget) apiKey() string {
	return wtf.Config.UString(
		"wtf.mods.jenkins.apiKey",
		os.Getenv("WTF_JENKINS_API_KEY"),
	)
}

func (widget *Widget) contentFrom(view *View) string {
	var str string
	for idx, job := range view.Jobs {
		str = str + fmt.Sprintf(
			`["%d"][""][%s] [%s]%-6s[white]`,
			idx,
			widget.rowColor(idx),
			widget.jobColor(&job),
			job.Name,
		)

		str = str + "\n"
	}

	return str
}

func (widget *Widget) rowColor(idx int) string {
	if widget.View.HasFocus() && (idx == widget.selected) {
		return wtf.DefaultFocussedRowColor()
	}

	return wtf.DefaultRowColor()
}

func (widget *Widget) jobColor(job *Job) string {
	switch job.Color {
	case "blue":
		// Override color if greenBalls boolean param provided in config
		if wtf.Config.UString("wtf.mods.jenkins.greenBalls") == "true" {
			return "green"
		} else {
			return "blue"
		}
	case "red":
		return "red"
	default:
		return "white"
	}
}

func (widget *Widget) next() {
	widget.selected++
	if widget.view != nil && widget.selected >= len(widget.view.Jobs) {
		widget.selected = 0
	}

	widget.display()
}

func (widget *Widget) prev() {
	widget.selected--
	if widget.selected < 0 && widget.view != nil {
		widget.selected = len(widget.view.Jobs) - 1
	}

	widget.display()
}

func (widget *Widget) openJob() {
	sel := widget.selected
	if sel >= 0 && widget.view != nil && sel < len(widget.view.Jobs) {
		job := &widget.view.Jobs[widget.selected]
		wtf.OpenFile(job.Url)
	}
}

func (widget *Widget) unselect() {
	widget.selected = -1
	widget.display()
}

func (widget *Widget) keyboardIntercept(event *tcell.EventKey) *tcell.EventKey {
	switch string(event.Rune()) {
	case "/":
		widget.ShowHelp()
	case "j":
		widget.next()
		return nil
	case "k":
		widget.prev()
		return nil
	case "r":
		widget.Refresh()
		return nil
	}

	switch event.Key() {
	case tcell.KeyDown:
		widget.next()
		return nil
	case tcell.KeyEnter:
		widget.openJob()
		return nil
	case tcell.KeyEsc:
		widget.unselect()
		return event
	case tcell.KeyUp:
		widget.prev()
		return nil
	default:
		return event
	}
}