package common

import (
	"encoding/json"
	"slices"

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

const (
	TimelineCommentType_ReviewRequested = "review_request"
	TimelineCommentType_Review          = "review"
	TimelineCommentType_PushPull        = "pull_push"
	TimelineCommentType_PullRequestRef  = "pull_ref"
	TimelineCommentType_DismissReview   = "dismiss_review"
	TimelineCommentType_Comment         = "comment"
)

func FetchTimelineSinceLastPush(gitea GiteaTimelineFetcher, headSha, org, repo string, id int64) ([]*models.TimelineComment, error) {
	timeline, err := gitea.GetTimeline(org, repo, id)
	if err != nil {
		return nil, err
	}

	//{"is_force_push":true,"commit_ids":["36e43509be1b13a1a8fc63a4361405de04cc621ab16935f88968c46193221bb6","732246a48fbc6bac9df16c0b0ca23ce0f6fbabd9990795863b6d1f0ef3f242c8"]}
	type PullPushData struct {
		IsForcePush bool     `json:"is_force_push"`
		CommitIds   []string `json:"commit_ids"`
	}

	// trim timeline to last push update or last time review request was requested
	for i, e := range timeline {
		if e.Type == TimelineCommentType_PushPull {
			var push PullPushData
			if err := json.Unmarshal([]byte(e.Body), &push); err != nil {
				LogError(err)
			}

			if slices.Contains(push.CommitIds, headSha) {
				return timeline[0:i], nil
			}
		}
	}

	return timeline, nil
}

func FetchTimelineSinceReviewRequestOrPush(gitea GiteaTimelineFetcher, groupName, headSha, org, repo string, id int64) ([]*models.TimelineComment, error) {
	timeline, err := FetchTimelineSinceLastPush(gitea, headSha, org, repo, id)
	if err != nil {
		return nil, err
	}

	// trim timeline to last push update or last time review request was requested
	for i, e := range timeline {
		if e.Type == TimelineCommentType_ReviewRequested && e.Assignee != nil && e.Assignee.UserName == groupName {
			// review request is cut-off for reviews too
			return timeline[0:i], nil
		}
	}

	return timeline, nil
}