package gel

import (
	"github.com/p9c/p9/pkg/gel/gio/font"
	"github.com/p9c/p9/pkg/gel/gio/text"
	"github.com/p9c/p9/pkg/gel/gio/unit"
	"github.com/p9c/p9/pkg/opts/binary"
	"github.com/p9c/p9/pkg/qu"
)

// Theme contains the styling configuration for gel widgets including colors,
// fonts, text sizing, and icon caching. It provides factory methods for creating
// themed widgets and manages the visual appearance of the user interface.
type Theme struct {
	quit       qu.C
	shaper     *text.Shaper
	collection Collection
	TextSize   unit.Sp
	*Colors
	icons         map[string]*Icon
	scrollBarSize int
	Dark          *binary.Opt
	iconCache     IconCache
	WidgetPool    *Pool
}

// NewTheme creates a new theme to use for rendering a user interface
func NewTheme(dark *binary.Opt, fontCollection []font.FontFace, quit qu.C) (th *Theme) {
	textSize := GetScaledTextSize(unit.Sp(16))
	th = &Theme{
		quit:          quit,
		shaper:        text.NewShaper(text.NoSystemFonts(), text.WithCollection(fontCollection)),
		collection:    fontCollection,
		TextSize:      textSize,
		Colors:        newColors(),
		scrollBarSize: 0,
		iconCache:     make(IconCache),
	}
	th.SetDarkTheme(dark.True())
	return
}