package main

import (
	"encoding/json"
	"flag"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
)

type RuntimeConfig struct {
	Path     string
	Http     HttpConfig     `json:"http"`
}

type HttpConfig struct {
	Host      string `json:"bind_host"`
	Port      string `json:"bind_port"`
	Static    string `json:"static"`
	Templates string `json:"templates"`
}

func GetRuntimeConfig() RuntimeConfig {

	config := RuntimeConfig{}

	flag.StringVar(&config.Path, "c", "/etc/ceres/config.json",
		"Path to ceres configuration file")
	flag.Parse()

	configFile, err := os.Open(config.Path)
	defer configFile.Close()
	if err != nil {
		log.Fatalf("Could not open configuration file %s", config.Path)
	}

	configData, err := ioutil.ReadAll(configFile)
	if err != nil {
		log.Fatalf("Could not read configuration file %s", config.Path)
	}

	err = json.Unmarshal(configData, &config)
	if err != nil {
		log.Fatalf("Could not parse configuration file %s", config.Path)
	}

	abs, err := filepath.Abs(config.Path)
	if err != nil {
		log.Fatalf("Could not translate %s to absolute path.", config.Path)
	}
	log.Printf("Config file: %s\n", abs)

	return config
}