package kite

import "net/http"

type Group struct {
	k      *Kite
	prefix string
	mws    []Middleware
}

func (g *Group) Static(prefix, root string, mws ...Middleware) {
	g.StaticFS(prefix, http.Dir(root), mws...)
}

func (g *Group) StaticFS(prefix string, fs http.FileSystem, mws ...Middleware) {
	if prefix == "" || prefix[len(prefix)-1] != '/' {
		prefix += "/"
	}
	fullPrefix := g.prefix + prefix

	handler := http.StripPrefix(fullPrefix, http.FileServer(fs))

	h := func(ctx *Context) error {
		handler.ServeHTTP(ctx.w, ctx.r)
		return nil
	}

	g.k.handle(http.MethodGet, fullPrefix+"*filepath", h, mws...)
	g.k.handle(http.MethodHead, fullPrefix+"*filepath", h, mws...)
}

func (g *Group) Group(prefix string, mws ...Middleware) *Group {
	return &Group{
		k:      g.k,
		prefix: g.prefix + prefix,
		mws:    append(append([]Middleware{}, g.mws...), mws...),
	}
}

func (g *Group) Use(mws ...Middleware) {
	g.mws = append(g.mws, mws...)
}

func (g *Group) CONNECT(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodConnect, path, h, mws...)
}

func (g *Group) DELETE(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodDelete, path, h, mws...)
}

func (g *Group) GET(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodGet, path, h, mws...)
}

func (g *Group) HEAD(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodHead, path, h, mws...)
}

func (g *Group) OPTIONS(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodOptions, path, h, mws...)
}

func (g *Group) PATCH(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodPatch, path, h, mws...)
}

func (g *Group) POST(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodPost, path, h, mws...)
}

func (g *Group) PUT(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodPut, path, h, mws...)
}

func (g *Group) TRACE(path string, h Handler, mws ...Middleware) {
	g.handle(http.MethodTrace, path, h, mws...)
}

func (g *Group) handle(method, path string, h Handler, mws ...Middleware) {
	combined := make([]Middleware, 0, len(g.mws)+len(mws))
	combined = append(combined, g.mws...)
	combined = append(combined, mws...)

	g.k.handle(method, g.prefix+path, h, combined...)
}