package rank

import (
	"context"

	"github.com/answerdev/answer/internal/base/pager"
	"github.com/answerdev/answer/internal/base/reason"
	"github.com/answerdev/answer/internal/entity"
	"github.com/answerdev/answer/internal/schema"
	"github.com/answerdev/answer/internal/service/activity_type"
	"github.com/answerdev/answer/internal/service/config"
	"github.com/answerdev/answer/internal/service/object_info"
	usercommon "github.com/answerdev/answer/internal/service/user_common"
	"github.com/segmentfault/pacman/errors"
	"github.com/segmentfault/pacman/log"
	"xorm.io/xorm"
)

const (
	QuestionAddRank      = "rank.question.add"
	QuestionEditRank     = "rank.question.edit"
	QuestionDeleteRank   = "rank.question.delete"
	QuestionVoteUpRank   = "rank.question.vote_up"
	QuestionVoteDownRank = "rank.question.vote_down"
	AnswerAddRank        = "rank.answer.add"
	AnswerEditRank       = "rank.answer.edit"
	AnswerDeleteRank     = "rank.answer.delete"
	AnswerAcceptRank     = "rank.answer.accept"
	AnswerVoteUpRank     = "rank.answer.vote_up"
	AnswerVoteDownRank   = "rank.answer.vote_down"
	CommentAddRank       = "rank.comment.add"
	CommentEditRank      = "rank.comment.edit"
	CommentDeleteRank    = "rank.comment.delete"
	ReportAddRank        = "rank.report.add"
	TagAddRank           = "rank.tag.add"
	TagEditRank          = "rank.tag.edit"
	TagDeleteRank        = "rank.tag.delete"
	TagSynonymRank       = "rank.tag.synonym"
	LinkUrlLimitRank     = "rank.link.url_limit"
	VoteDetailRank       = "rank.vote.detail"
)

type UserRankRepo interface {
	TriggerUserRank(ctx context.Context, session *xorm.Session, userId string, rank int, activityType int) (isReachStandard bool, err error)
	UserRankPage(ctx context.Context, userId string, page, pageSize int) (rankPage []*entity.Activity, total int64, err error)
}

// RankService rank service
type RankService struct {
	userCommon        *usercommon.UserCommon
	configRepo        config.ConfigRepo
	userRankRepo      UserRankRepo
	objectInfoService *object_info.ObjService
}

// NewRankService new rank service
func NewRankService(
	userCommon *usercommon.UserCommon,
	userRankRepo UserRankRepo,
	objectInfoService *object_info.ObjService,
	configRepo config.ConfigRepo) *RankService {
	return &RankService{
		userCommon:        userCommon,
		configRepo:        configRepo,
		userRankRepo:      userRankRepo,
		objectInfoService: objectInfoService,
	}
}

// CheckRankPermission check whether the user reputation meets the permission
func (rs *RankService) CheckRankPermission(ctx context.Context, userID string, action string) (can bool, err error) {
	if len(userID) == 0 {
		return false, nil
	}

	// get the rank of the current user
	userInfo, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
	if err != nil {
		return false, err
	}
	if !exist {
		return false, nil
	}
	currentUserRank := userInfo.Rank

	// get the amount of rank required for the current operation
	requireRank, err := rs.configRepo.GetInt(action)
	if err != nil {
		return false, err
	}

	if currentUserRank < requireRank {
		log.Debugf("user %s want to do action %s, but rank %d < %d",
			userInfo.DisplayName, action, currentUserRank, requireRank)
		return false, nil
	}
	return true, nil
}

// GetRankPersonalWithPage get personal comment list page
func (rs *RankService) GetRankPersonalWithPage(ctx context.Context, req *schema.GetRankPersonalWithPageReq) (
	pageModel *pager.PageModel, err error) {
	if len(req.Username) > 0 {
		userInfo, exist, err := rs.userCommon.GetUserBasicInfoByUserName(ctx, req.Username)
		if err != nil {
			return nil, err
		}
		if !exist {
			return nil, errors.BadRequest(reason.UserNotFound)
		}
		req.UserID = userInfo.ID
	}
	if len(req.UserID) == 0 {
		return nil, errors.BadRequest(reason.UserNotFound)
	}

	userRankPage, total, err := rs.userRankRepo.UserRankPage(ctx, req.UserID, req.Page, req.PageSize)
	if err != nil {
		return nil, err
	}
	resp := make([]*schema.GetRankPersonalWithPageResp, 0)
	for _, userRankInfo := range userRankPage {
		commentResp := &schema.GetRankPersonalWithPageResp{
			CreatedAt:  userRankInfo.CreatedAt.Unix(),
			ObjectID:   userRankInfo.ObjectID,
			Reputation: userRankInfo.Rank,
		}
		if len(userRankInfo.ObjectID) > 0 {
			objInfo, err := rs.objectInfoService.GetInfo(ctx, userRankInfo.ObjectID)
			if err != nil {
				log.Error(err)
			} else {
				commentResp.RankType = activity_type.Format(userRankInfo.ActivityType)
				commentResp.ObjectType = objInfo.ObjectType
				commentResp.Title = objInfo.Title
				commentResp.Content = objInfo.Content
				commentResp.QuestionID = objInfo.QuestionID
				commentResp.AnswerID = objInfo.AnswerID
			}
		}
		resp = append(resp, commentResp)
	}
	return pager.NewPageModel(total, resp), nil
}