package renderer

import (
	"image"
	"log/slog"

	"git.eeqj.de/sneak/hdmistat/internal/layout"
	"git.eeqj.de/sneak/hdmistat/internal/statcollector"
	"github.com/golang/freetype/truetype"
)

// Screen represents a displayable screen
type Screen interface {
	Name() string
	Render(canvas *layout.Canvas, info *statcollector.SystemInfo) error
}

// Renderer manages screen rendering
type Renderer struct {
	font   *truetype.Font
	logger *slog.Logger
	width  int
	height int
}

// NewRenderer creates a new renderer
func NewRenderer(font *truetype.Font, logger *slog.Logger) *Renderer {
	return &Renderer{
		font:   font,
		logger: logger,
		width:  1920, // Default HD resolution
		height: 1080,
	}
}

// SetResolution sets the rendering resolution
func (r *Renderer) SetResolution(width, height int) {
	r.width = width
	r.height = height
}

// RenderScreen renders a screen to an image
func (r *Renderer) RenderScreen(screen Screen, info *statcollector.SystemInfo) (*image.RGBA, error) {
	canvas := layout.NewCanvas(r.width, r.height, r.font, r.logger)

	if err := screen.Render(canvas, info); err != nil {
		return nil, err
	}

	return canvas.Image(), nil
}