package ui

import (
	"fmt"
	"time"

	"git.patanix.de/git/kettlebell-app/internal/data"
	"git.patanix.de/git/kettlebell-app/internal/services"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/widget"
)

func MakeTrainingScreen(ts *services.TrainingService, ss *services.SettingsService, parent fyne.Window) fyne.CanvasObject {
	// UI-Elemente
	timerLabel := widget.NewLabelWithStyle("20:00", fyne.TextAlignCenter, fyne.TextStyle{Bold: true})
	// timerLabel.TextSize = 60

	setsLabel := widget.NewLabelWithStyle("0 / 8", fyne.TextAlignCenter, fyne.TextStyle{Bold: true})
	// setsLabel.TextSize = 48
	// setsLabel.Color = theme.ColorSky400

	repsLabel := widget.NewLabelWithStyle("5 Wiederholungen", fyne.TextAlignCenter, fyne.TextStyle{})
	// repsLabel.TextSize = 20

	var mainTimer *time.Ticker

	updateUI := func() {
		state := ts.State
		timerLabel.SetText(formatDuration(int64(state.RemainingSeconds)))
		setsLabel.SetText(fmt.Sprintf("%d / %d", state.SetsDone, state.GoalSets))
		repsLabel.SetText(fmt.Sprintf("%d Wiederholungen", state.RepsPerSet))
	}

	finishAction := func() {
		if mainTimer != nil {
			mainTimer.Stop()
		}
		// ... (Logik zum Speichern wie zuvor) ...
		session := &data.TrainingSession{
			Date:        time.Now(),
			Sets:        int64(ts.State.SetsDone),
			WeightLeft:  ss.LoadSettings().WeightLeft,
			WeightRight: ss.LoadSettings().WeightRight,
			RepsPerSet:  int64(ts.State.RepsPerSet),
			Duration:    int64(ts.State.InitialDurationSeconds - ts.State.RemainingSeconds),
		}
		ts.FinishTraining(session)
		fyne.CurrentApp().SendNotification(&fyne.Notification{Title: "Training gespeichert!", Content: "Gut gemacht!"})
		updateUI()
	}

	startAction := func() {
		settings := ss.LoadSettings()
		ts.StartTraining(settings.TrainingTimeMinutes, settings.GoalSets)
		updateUI()

		mainTimer = time.NewTicker(time.Second)
		go func() {
			for range mainTimer.C {
				if ts.State.RemainingSeconds <= 0 {
					finishAction()
					return
				}
				ts.Tick()
				updateUI()
			}
		}()
	}

	setAction := func() {
		ts.CompleteSet()
		updateUI()
	}

	// Layout im "Cockpit"-Stil
	topPart := container.NewVBox(
		widget.NewLabelWithStyle("Verbleibende Zeit", fyne.TextAlignCenter, fyne.TextStyle{}),
		timerLabel,
	)

	middlePart := container.NewVBox(
		widget.NewLabelWithStyle("Sätze", fyne.TextAlignCenter, fyne.TextStyle{}),
		setsLabel,
		repsLabel,
	)

	finishButton := widget.NewButton("Training beenden", finishAction)
	// Wir simulieren den roten Button durch die Error-Farbe des Themes
	finishButton.Importance = widget.HighImportance

	bottomPart := container.NewVBox(
		widget.NewButton("Satz abschließen", setAction),
		finishButton,
	)
	// HINWEIS: Start-Button fehlt hier, da der Flow vom Home-Screen ausgeht.
	// Man könnte ihn bei Bedarf hinzufügen.

	return container.NewBorder(topPart, bottomPart, nil, nil, container.NewCenter(middlePart))
}