// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package models

import (
	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/log"
	api "code.gitea.io/gitea/modules/structs"
)

// ChangeMilestoneAssign changes assignment of milestone for issue.
func ChangeMilestoneAssign(issue *models.Issue, doer *models.User, oldMilestoneID int64) (err error) {
	if err = models.ChangeMilestoneAssign(issue, doer, oldMilestoneID); err != nil {
		return
	}

	var hookAction api.HookIssueAction
	if issue.MilestoneID > 0 {
		hookAction = api.HookIssueMilestoned
	} else {
		hookAction = api.HookIssueDemilestoned
	}

	if err = issue.LoadAttributes(); err != nil {
		return err
	}

	mode, _ := models.AccessLevel(doer, issue.Repo)
	if issue.IsPull {
		err = issue.PullRequest.LoadIssue()
		if err != nil {
			log.Error("LoadIssue: %v", err)
			return
		}
		err = models.PrepareWebhooks(issue.Repo, models.HookEventPullRequest, &api.PullRequestPayload{
			Action:      hookAction,
			Index:       issue.Index,
			PullRequest: issue.PullRequest.APIFormat(),
			Repository:  issue.Repo.APIFormat(mode),
			Sender:      doer.APIFormat(),
		})
	} else {
		err = models.PrepareWebhooks(issue.Repo, models.HookEventIssues, &api.IssuePayload{
			Action:     hookAction,
			Index:      issue.Index,
			Issue:      issue.APIFormat(),
			Repository: issue.Repo.APIFormat(mode),
			Sender:     doer.APIFormat(),
		})
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	} else {
		go models.HookQueue.Add(issue.RepoID)
	}
	return nil
}