package report

import "sort"

// themeAssets bundles everything a report or index page needs to render in
// one visual theme: the shared stylesheet (cards, tables, nav, badges, ...),
// report-only CSS (map + map label), and the color/URL values referenced by
// the inline Chart.js / Leaflet JS.
type themeAssets struct {
	CSS      string // shared :root + component stylesheet
	ExtraCSS string // report-only overrides (map, map label)

	ChartFont string // Chart.js font-family
	ChartText string // Chart.js default text color
	ChartGrid string // Chart.js default grid/border color

	Chart1     string // 2xx / success series color
	Chart2     string // 3xx / timeline series color
	Chart2Fill string // timeline area fill (rgba)
	Chart3     string // top-paths bar color / decorative accent
	ChartWarn  string // 4xx series color
	ChartErr   string // 5xx series color

	MapTileURL     string
	MapAttribution string
	MarkerColor    string
}

// DefaultTheme is used when no theme is specified or an unknown name is given.
const DefaultTheme = "cyberpunk"

var themeRegistry = map[string]themeAssets{
	"cyberpunk":  cyberpunkTheme,
	"purplerain": purplerainTheme,
	"cactus":     cactusTheme,
}

// ThemeNames returns the sorted list of valid --theme values.
func ThemeNames() []string {
	names := make([]string, 0, len(themeRegistry))
	for name := range themeRegistry {
		names = append(names, name)
	}
	sort.Strings(names)
	return names
}

// themeFor looks up a theme by name, falling back to DefaultTheme for an
// empty or unrecognized name.
func themeFor(name string) themeAssets {
	if t, ok := themeRegistry[name]; ok {
		return t
	}
	return themeRegistry[DefaultTheme]
}