// Package views renders the server-side HTML with gomponents.
// Every function returns a g.Node. Handlers pass the result to Render.
package views

import (
	"net/http"

	"hearthforge/internal/highlight"

	"hearthforge/internal/config"
	"hearthforge/internal/db"
	"hearthforge/internal/util"

	g "maragu.dev/gomponents"
	. "maragu.dev/gomponents/html"
)

// Page carries the data the page shell needs.
type Page struct {
	Title string
	User  *db.SessionUser
	Cfg   *config.Config
}

// Layout renders the full HTML document around the body nodes.
func Layout(p Page, body ...g.Node) g.Node {
	pageTitle := "Hearthforge"
	if p.Title != "" {
		pageTitle = p.Title + " — Hearthforge"
	}
	owner := ""
	if p.Cfg != nil {
		owner = p.Cfg.OwnerDisplayName
	}
	return HTML(Lang("en"),
		Head(
			Meta(Charset("UTF-8")),
			Meta(Name("viewport"), Content("width=500")),
			TitleEl(g.Text(pageTitle)),
			Script(Src("/assets/theme.js")),
			Link(Rel("icon"), Type("image/svg+xml"), Href("/assets/favicon.svg")),
			Link(Rel("stylesheet"), Href("/assets/css/main.css")),
			Link(Rel("stylesheet"), Href("/assets/code-theme.css?v="+highlight.CSSVersion())),
			Script(Src("/assets/app.js"), Defer()),
		),
		Body(
			Header(Class("site-header"),
				Nav(Class("site-nav"),
					A(Href("/"), Class("site-logo"),
						Img(Src("/assets/favicon.svg"), Class("logo-icon"), Alt(""), Aria("hidden", "true")),
						Span(Class("logo-text"), g.Text("Hearthforge")),
					),
					Div(Class("nav-links"),
						g.Iff(p.User != nil, func() g.Node {
							return g.Group{
								A(Href("/settings"), Class("nav-user"),
									Avatar(&p.User.ID, &p.User.AvatarVersion, 24),
									Span(g.Text(util.DisplayName(p.User.Username, owner))),
								),
								Form(Method("POST"), Action("/logout"), Class("inline-form"),
									Button(Type("submit"), Class("btn btn-sm"), g.Text("Sign out")),
								),
							}
						}),
						g.If(p.User == nil, g.Group{
							A(Href("/login"), Class("btn btn-sm"), g.Text("Sign in")),
							A(Href("/register"), Class("btn btn-sm btn-primary"), g.Text("Register")),
						}),
					),
				),
			),
			Main(Class("site-main"), g.Group(body)),
			Footer(Class("site-footer"),
				P(g.Text("Hearthforge — hosted by "+owner)),
			),
		),
	)
}

// Render writes a full HTML document to the response.
func Render(w http.ResponseWriter, status int, node g.Node) {
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	w.Header().Set("Cache-Control", "no-store")
	w.WriteHeader(status)
	_ = Doctype(node).Render(w)
}