package main

import (
	"log"
	"os"
	"regexp"
	"strconv"

	"src.opensuse.org/autogits/common"
	"src.opensuse.org/autogits/common/gitea-generated/models"
)

const (
	GitAuthor   = "GiteaBot - Obs Staging"
	ObsBuildBot = "/obsbuild"
)

var GiteaToken string
var runId uint

func failOnError(err error, msg string) {
	if err != nil {
		log.Panicf("%s: %s", err, msg)
	}
}

func allocateRequestHandler() *common.RequestHandler {
	return &common.RequestHandler{
		Logger: common.CreateStdoutLogger(os.Stdout, os.Stdout),
	}
}

func processPullNotification(h *common.RequestHandler, notification *models.NotificationSubject) {
	rx := regexp.MustCompile(`^https://src\.(?:open)?suse\.org/api/v\d+/repos/(?<org>[a-zA-Z0-9]+)/(?<project>[_a-zA-Z0-9]+)/issues/(?<num>[0-9]+)$`)
	match := rx.FindStringSubmatch(notification.URL)
	if match == nil {
		log.Panicf("Unexpected format of notification: %s", notification.URL)
	}

	h.Log("processing")
	h.Log("project: %s", match[2])
	h.Log("org:     %s", match[1])
	h.Log("number:  %s", match[3])

	org := match[1]
	repo := match[2]
	id, _ := strconv.ParseInt(match[3], 10, 64)

	pr, reviews, err := h.GetPullRequestAndReviews(org, repo, id)
	if err != nil {
		return
	}

	for _, reviewer := range pr.RequestedReviewers {
		h.Log(reviewer.UserName)
	}

	obsClient, err := common.NewObsClient("api.opensuse.org")
	if err != nil {
		h.LogPlainError(err)
		return
	}

	for _, review := range reviews {
		h.Log("state: %s,   body: %s,   id:%d\n", string(review.State), review.Body, review.ID)

		if *review.User.LoginName != "autogits_obs_staging_bot" {
			continue
		}

		switch review.State {
		case common.ReviewStateUnknown, common.ReviewStateRequestReview:
		// create build project, if doesn't exist, and add it to pending requests
		case common.ReviewStatePending:
		// waiting for build results
		case common.ReviewStateApproved:
		// done, mark notification as read
		case common.ReviewStateRequestChanges:
			// build failures, mark notification as read
		}
	}
}

func pollWorkNotifications() {
	h := allocateRequestHandler()
	data, err := h.GetNotifications(nil)

	if err != nil {
		h.LogPlainError(err)
		return
	}

	if data != nil {
		for _, notification := range data {

			switch notification.Subject.Type {
			case "Pull":
				processPullNotification(h, notification.Subject)
			default:
				h.SetNotificationRead(notification.ID)
			}
		}
	}
}

func main() {
	var defs common.ListenDefinitions

	defs.Url = ObsBuildBot
	defs.GitAuthor = GitAuthor

	failOnError(common.RequireGiteaSecretToken(), "Cannot find GITEA_TOKEN")
	failOnError(common.RequireObsSecretToken(), "Cannot find OBS_USER and OBS_PASSWORD")

	//	go ProcessingObsMessages("rabbit.opensuse.org", "opensuse", "opensuse", "")

	pollWorkNotifications()


	stuck := make(chan int)
	<-stuck
}