// Copyright 2013 Prometheus Team
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package web

import (
	"github.com/prometheus/prometheus/appstate"
	"github.com/prometheus/prometheus/retrieval"
	"github.com/prometheus/prometheus/web/blob"
	"html/template"
	"log"
	"net/http"
)

type PrometheusStatus struct {
	Config      string
	Rules       string
	Status      string
	TargetPools map[string]*retrieval.TargetPool
}

type StatusHandler struct {
	appState *appstate.ApplicationState
}

func (h *StatusHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	status := &PrometheusStatus{
		Config:      h.appState.Config.ToString(0),
		Rules:       "TODO: list rules here",
		Status:      "TODO: add status information here",
		TargetPools: h.appState.TargetManager.Pools(),
	}
	templateFile, err := blob.GetFile(blob.TemplateFiles, "status.html")
	if err != nil {
		log.Fatalf("Could not read template: %s", err)
	}

	t, _ := template.New("status").Parse(string(templateFile))
	t.Execute(w, status)
}