package main

import (
	"context"
	"flag"
	"fmt"
	"net/http"
	"os"

	"git.faercol.me/monitoring/sys-exporter/config"
	"git.faercol.me/monitoring/sys-exporter/registry"
	"github.com/prometheus/client_golang/prometheus/promhttp"

	_ "git.faercol.me/monitoring/sys-exporter/collector/loadavg"
	_ "git.faercol.me/monitoring/sys-exporter/collector/meminfo"
	_ "git.faercol.me/monitoring/sys-exporter/collector/pacman"
	_ "git.faercol.me/monitoring/sys-exporter/collector/systemd"
	_ "git.faercol.me/monitoring/sys-exporter/collector/uptime"
)

var confFileLocation string

// type gatherer struct {
// 	reg *prometheus.Registry
// }

// func (g *gatherer) Gather() (pcm.MetricFamily, error) {
// 	return g.reg.
// }

func main() {
	flag.Parse()

	conf, err := config.New(confFileLocation)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to open configuration: %s\n", err)
		os.Exit(1)
	}

	rawL, err := conf.ZapConfig().Build()
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to init logger: %s\n", err)
		os.Exit(1)
	}
	logger := rawL.Sugar()
	logger.Infof("Initialized logger to %v level", logger.Level())

	logger.Infof("Loading %d collectors", len(conf.Collectors))
	if len(conf.Collectors) == 0 {
		logger.Warn("No collector present in the config, is this expected?")
	}

	logger.Info("Starting server")
	registry.R.Run(context.Background(), conf, logger)

	http.Handle("/metrics", promhttp.HandlerFor(registry.R.PromRegistry(), promhttp.HandlerOpts{}))
	http.ListenAndServe(":2112", nil)
}

func init() {
	flag.StringVar(&confFileLocation, "config", config.DefaultConfigFileLocation, "Location of the config file")
}