package layout_test

import (
	"testing"
	"time"

	"git.eeqj.de/sneak/hdmistat/internal/fbdraw"
	"git.eeqj.de/sneak/hdmistat/internal/layout"
)

// ExampleScreen shows how to create a screen that implements FrameGenerator
type ExampleScreen struct {
	name   string
	fps    float64
	width  int
	height int
}

func (s *ExampleScreen) GenerateFrame(grid *fbdraw.CharGrid) error {
	// Create a draw context that works on the provided grid
	draw := layout.NewDraw(grid)

	// Clear the screen
	draw.Clear()

	// Draw a title
	draw.Color(layout.Color("cyan")).Bold()
	draw.TextCenter(0, 2, "Example Screen: %s", s.name)

	// Create a grid for structured layout
	contentGrid := draw.Grid(5, 5, 70, 20)
	contentGrid.Border(layout.Color("gray50"))

	// Add some content
	contentGrid.Color(layout.Color("white")).WriteCenter(1, "Current Time: %s", time.Now().Format("15:04:05"))

	// Draw a progress bar
	contentGrid.Color(layout.Color("green")).Bar(10, 5, 50, 75.0, layout.Color("green"))

	// Add system stats
	contentGrid.Color(layout.Color("yellow")).Write(2, 8, "CPU: %.1f%%", 42.5)
	contentGrid.Color(layout.Color("orange")).Write(2, 9, "Memory: %s / %s", layout.Bytes(4*1024*1024*1024), layout.Bytes(16*1024*1024*1024))

	return nil
}

func (s *ExampleScreen) FramesPerSecond() float64 {
	return s.fps
}

func (s *ExampleScreen) Init(width, height int) error {
	s.width = width
	s.height = height
	return nil
}

func TestExampleUsage(t *testing.T) {
	// This is just an example - in real usage you'd use NewFBDisplayAuto()
	// For testing we'll skip since we don't have a framebuffer
	t.Skip("Example test - requires framebuffer")

	// Add screens
	_ = carousel.AddScreen("Dashboard", &ExampleScreen{name: "Dashboard", fps: 1.0})
	_ = carousel.AddScreen("System Monitor", &ExampleScreen{name: "System Monitor", fps: 2.0})
	_ = carousel.AddScreen("Network Stats", &ExampleScreen{name: "Network Stats", fps: 0.5})

	// In a real application, you would run this in a goroutine
	// ctx := context.Background()
	// go carousel.Run(ctx)
}