package tray

import (
	"fmt"
	"time"

	"git.davoryn.de/calic/syncwarden/internal/icons"
	"git.davoryn.de/calic/syncwarden/internal/monitor"
)

// formatTooltip generates the tooltip text from aggregate status.
func formatTooltip(s monitor.AggregateStatus, showRate bool) string {
	stateStr := stateLabel(s.State)

	tip := fmt.Sprintf("SyncWarden: %s", stateStr)

	// Devices
	tip += fmt.Sprintf(" | %d/%d devices", s.DevicesOnline, s.DevicesTotal)

	// Transfer rate
	if showRate && (s.DownRate > 0 || s.UpRate > 0) {
		tip += fmt.Sprintf(" | ↓%s ↑%s", formatBytes(s.DownRate), formatBytes(s.UpRate))
	}

	// Last sync
	if !s.LastSync.IsZero() {
		tip += fmt.Sprintf(" | Last sync: %s", formatTimeAgo(s.LastSync))
	}

	return tip
}

func stateLabel(s icons.State) string {
	switch s {
	case icons.StateIdle:
		return "Idle"
	case icons.StateSyncing:
		return "Syncing"
	case icons.StatePaused:
		return "Paused"
	case icons.StateError:
		return "Error"
	case icons.StateDisconnected:
		return "Disconnected"
	default:
		return "Unknown"
	}
}

func formatBytes(bps float64) string {
	if bps < 1024 {
		return fmt.Sprintf("%.0f B/s", bps)
	}
	if bps < 1024*1024 {
		return fmt.Sprintf("%.1f KB/s", bps/1024)
	}
	if bps < 1024*1024*1024 {
		return fmt.Sprintf("%.1f MB/s", bps/(1024*1024))
	}
	return fmt.Sprintf("%.1f GB/s", bps/(1024*1024*1024))
}

func formatTimeAgo(t time.Time) string {
	d := time.Since(t)
	if d < time.Minute {
		return "just now"
	}
	if d < time.Hour {
		m := int(d.Minutes())
		if m == 1 {
			return "1 min ago"
		}
		return fmt.Sprintf("%d min ago", m)
	}
	if d < 24*time.Hour {
		h := int(d.Hours())
		if h == 1 {
			return "1 hour ago"
		}
		return fmt.Sprintf("%d hours ago", h)
	}
	days := int(d.Hours()) / 24
	if days == 1 {
		return "1 day ago"
	}
	return fmt.Sprintf("%d days ago", days)
}