package main

import (
	"context"
	"net/http"
	_ "net/http/pprof"
	"regexp"
	"runtime"
	"sync"
	"time"

	"github.com/microcosm-cc/bluemonday"
	"git.farhan.codes/farhan/fedilogue/shared"
)

// Current instances
var runninginstances map[string]shared.RunningInstance
var ri_mutex = &sync.Mutex{}

func startpprof() {
	logInfo("Starting http/pprof on :7777")
	logFatal(http.ListenAndServe("127.0.0.1:7777", nil))
}

func statusReportHandler() {
	for {
		StatusReport()
		time.Sleep(time.Second * 60)
	}
}

/* Tests:
   - TestStatusReport_empty_run
   - TestStatusReport_full_content
*/
func StatusReport() {
	running := 0
	keepalive := 0
	unsupported := 0

	mastodon := 0
	pleroma := 0
	misskey := 0
	other := 0
	ri_mutex.Lock()
	for i, o := range runninginstances {
		logDebug("Software ", o.Software, " Status: ", o.Status, " instance ", i)
		if o.Status == 200 {
			running = running + 1
		} else if o.Status == 607 { // Keepalive
			keepalive = keepalive + 1
		} else if o.Status == 605 { // Unsupported instance
			unsupported = unsupported + 1
		}

		if o.Software == "mastodon" && o.Status == 200 {
			mastodon = mastodon + 1
		} else if o.Software == "pleroma" && o.Status == 200 {
			pleroma = pleroma + 1
		} else if o.Software == "misskey" && o.Status == 200 {
			misskey = misskey + 1
		} else if o.Status == 200 {
			other = other + 1
		}
	}
	ri_mutex.Unlock()
	logInfo("Running:", running, " Keepalive:", keepalive, " Unsupported:", unsupported, " Ma:", mastodon, ",P:", pleroma, ",Mi:", misskey, ",O:", other)
}

func main() {
	// Initial Setup
	logInit()
	runninginstances = make(map[string]shared.RunningInstance)

	getSettings()
	go startpprof()

	pool = getDbPool()

	p = bluemonday.NewPolicy()
	spaceReg = regexp.MustCompile(`[\s\t\.]+`)
	removeHTMLReg = regexp.MustCompile(`<\/?\s*br\s*>`)
	re = regexp.MustCompile("^https?://([^/]*)/(.*)$")
	matchurl = regexp.MustCompile("http?s://[\\w\\-]+\\.[\\w\\-]+\\S*")
	staggeredStartChan = make(chan bool)

	// Start instances located in database
	rows, err := pool.Query(context.Background(), "SELECT endpoint FROM instances")
	if err != nil {
		logErr("Unable to select from instances")
		return
	}
	defer rows.Close()

	go staggeredStart()
	go statusReportHandler()

	for rows.Next() {
		var endpoint string
		err = rows.Scan(&endpoint)
		if err != nil {
			logErr("Unable to iterate database, exiting.")
			return
		}
		o, exists := GetRunner(endpoint)
		if o.Banned == true {
			continue // Banned instance
		}
		if exists == false {
			go StartInstance(endpoint)
		}
	}

	go startctl()
	go webmain()

	runtime.Goexit()
}