package main

import (
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
)

var css = []string{"bundle.css", "remixicon.css"}
var cssHeader = func() string {
	l := len(css)
	h := ""
	for i, f := range css {
		h += "</css/" + f + ">; rel=preload; as=style"
		if l > 1 && i != (l-1) {
			h += ", "
		}
	}
	return h
}()

func gcHTML(gc *gin.Context, code int, file string, templ gin.H) {
	gc.Header("Cache-Control", "no-cache")
	gc.HTML(code, file, templ)
}

func (app *appContext) pushResources(gc *gin.Context, admin bool) {
	if pusher := gc.Writer.Pusher(); pusher != nil {
		app.debug.Println("Using HTTP2 Server push")
		if admin {
			toPush := []string{"/js/admin.js", "/js/theme.js", "/js/lang.js", "/js/modal.js", "/js/tabs.js", "/js/invites.js", "/js/accounts.js", "/js/settings.js", "/js/profiles.js", "/js/common.js"}
			for _, f := range toPush {
				if err := pusher.Push(f, nil); err != nil {
					app.debug.Printf("Failed HTTP2 ServerPush of \"%s\": %+v", f, err)
				}
			}
		}
	}
	gc.Header("Link", cssHeader)
}

func (app *appContext) AdminPage(gc *gin.Context) {
	app.pushResources(gc, true)
	lang := gc.Query("lang")
	if lang == "" {
		lang = app.storage.lang.chosenAdminLang
	} else if _, ok := app.storage.lang.Admin[lang]; !ok {
		lang = app.storage.lang.chosenAdminLang
	}
	emailEnabled, _ := app.config.Section("invite_emails").Key("enabled").Bool()
	notificationsEnabled, _ := app.config.Section("notifications").Key("enabled").Bool()
	ombiEnabled := app.config.Section("ombi").Key("enabled").MustBool(false)
	gcHTML(gc, http.StatusOK, "admin.html", gin.H{
		"urlBase":         app.URLBase,
		"cssClass":        app.cssClass,
		"contactMessage":  "",
		"email_enabled":   emailEnabled,
		"notifications":   notificationsEnabled,
		"version":         VERSION,
		"commit":          COMMIT,
		"ombiEnabled":     ombiEnabled,
		"username":        !app.config.Section("email").Key("no_username").MustBool(false),
		"strings":         app.storage.lang.Admin[lang].Strings,
		"quantityStrings": app.storage.lang.Admin[lang].QuantityStrings,
		"language":        app.storage.lang.Admin[lang].JSON,
	})
}

func (app *appContext) InviteProxy(gc *gin.Context) {
	app.pushResources(gc, false)
	code := gc.Param("invCode")
	lang := gc.Query("lang")
	if lang == "" {
		lang = app.storage.lang.chosenFormLang
	} else if _, ok := app.storage.lang.Form[lang]; !ok {
		lang = app.storage.lang.chosenFormLang
	}
	/* Don't actually check if the invite is valid, just if it exists, just so the page loads quicker. Invite is actually checked on submit anyway. */
	// if app.checkInvite(code, false, "") {
	if _, ok := app.storage.invites[code]; ok {
		email := app.storage.invites[code].Email
		if strings.Contains(email, "Failed") {
			email = ""
		}
		gcHTML(gc, http.StatusOK, "form-loader.html", gin.H{
			"urlBase":           app.URLBase,
			"cssClass":          app.cssClass,
			"contactMessage":    app.config.Section("ui").Key("contact_message").String(),
			"helpMessage":       app.config.Section("ui").Key("help_message").String(),
			"successMessage":    app.config.Section("ui").Key("success_message").String(),
			"jfLink":            app.config.Section("jellyfin").Key("public_server").String(),
			"validate":          app.config.Section("password_validation").Key("enabled").MustBool(false),
			"requirements":      app.validator.getCriteria(),
			"email":             email,
			"username":          !app.config.Section("email").Key("no_username").MustBool(false),
			"strings":           app.storage.lang.Form[lang].Strings,
			"validationStrings": app.storage.lang.Form[lang].validationStringsJSON,
			"notifications":     app.storage.lang.Form[lang].notificationsJSON,
			"code":              code,
		})
	} else {
		gcHTML(gc, 404, "invalidCode.html", gin.H{
			"cssClass":       app.cssClass,
			"contactMessage": app.config.Section("ui").Key("contact_message").String(),
		})
	}
}

func (app *appContext) NoRouteHandler(gc *gin.Context) {
	app.pushResources(gc, false)
	gcHTML(gc, 404, "404.html", gin.H{
		"cssClass":       app.cssClass,
		"contactMessage": app.config.Section("ui").Key("contact_message").String(),
	})
}