package ersteller_lib

import (
	"maragu.dev/gomponents"
	htmx "maragu.dev/gomponents-htmx"
	"net/http"
)

type HtmxContext interface {
	Render(node gomponents.Node)
	GetLanguage() Language
	GetActivePath() *ActivePath
	HasActivePath() bool
	SetActivePath(activePath *ActivePath)
}

type HtmxContextImpl struct {
	req        *http.Request
	res        http.ResponseWriter
	language   Language
	activePath *ActivePath
}

func (c *HtmxContextImpl) SetActivePath(activePath *ActivePath) {
	c.activePath = activePath
}

func (c *HtmxContextImpl) GetActivePath() *ActivePath {
	return c.activePath
}

func (c *HtmxContextImpl) HasActivePath() bool {
	return c.activePath != nil
}

func (c *HtmxContextImpl) GetLanguage() Language {
	return c.language
}

func NewHtmxContext(req *http.Request, res http.ResponseWriter, language Language) HtmxContext {
	return &HtmxContextImpl{req: req, res: res, language: language}
}

func (c *HtmxContextImpl) Render(node gomponents.Node) {
	err := node.Render(c.res)
	if err != nil {
		Error("failed to render", err)
		_, writeErr := c.res.Write([]byte(err.Error()))
		if writeErr != nil {
			Error("failed to write error", writeErr)
		}
		c.res.WriteHeader(500)
	}
}

type HtmxRouteFunc func(ctx HtmxContext)

type HtmxPathParam struct {
	Key   string
	Value string
}

type HtmxRoute interface {
	WithPathParams(params ...HtmxPathParam) HtmxRoute
	ToUrl(queryParams ...HtmxPathParam) string
	GetHtmx(queryParams ...HtmxPathParam) gomponents.Node
	SetActivePath(activePath *ActivePath) HtmxRoute
}

type HtmxGetRoute struct {
	Path       string
	RouteFunc  HtmxRouteFunc
	PathParams []HtmxPathParam
	Languages  []Language
	ActivePath *ActivePath
}

func (h HtmxGetRoute) SetActivePath(activePath *ActivePath) HtmxRoute {
	h.ActivePath = activePath
	return h
}

func NewHtmxGetRoute(path string, routeFunc HtmxRouteFunc, languages ...Language) *HtmxGetRoute {
	return &HtmxGetRoute{Path: path, RouteFunc: routeFunc, Languages: languages}
}

func (h HtmxGetRoute) Add(server *http.ServeMux) {
	for _, language := range h.Languages {
		server.HandleFunc("GET /"+string(language)+h.Path, func(res http.ResponseWriter, req *http.Request) {
			context := NewHtmxContext(req, res, language)
			if h.ActivePath != nil {
				context.SetActivePath(h.ActivePath)
			}
			h.RouteFunc(context)
		})
	}
}

func (h HtmxGetRoute) WithPathParams(params ...HtmxPathParam) HtmxRoute {
	h.PathParams = params
	return h
}

func (h HtmxGetRoute) ToUrl(queryParams ...HtmxPathParam) string {
	return h.Path
}

func (h HtmxGetRoute) GetHtmx(queryParams ...HtmxPathParam) gomponents.Node {
	return htmx.Get(h.ToUrl(queryParams...))
}