package relation

import (
	"context"
	"time"

	"gorm.io/gorm"

	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/ormutil"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/relation"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/errs"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/utils"
)

var _ relation.GroupModelInterface = (*GroupGorm)(nil)

type GroupGorm struct {
	*MetaDB
}

func NewGroupDB(db *gorm.DB) relation.GroupModelInterface {
	return &GroupGorm{NewMetaDB(db, &relation.GroupModel{})}
}

func (g *GroupGorm) NewTx(tx any) relation.GroupModelInterface {
	return &GroupGorm{NewMetaDB(tx.(*gorm.DB), &relation.GroupModel{})}
}

func (g *GroupGorm) Create(ctx context.Context, groups []*relation.GroupModel) (err error) {
	return utils.Wrap(g.DB.Create(&groups).Error, "")
}

func (g *GroupGorm) UpdateMap(ctx context.Context, groupID string, args map[string]interface{}) (err error) {
	return utils.Wrap(g.DB.Where("group_id = ?", groupID).Model(&relation.GroupModel{}).Updates(args).Error, "")
}

func (g *GroupGorm) UpdateStatus(ctx context.Context, groupID string, status int32) (err error) {
	return utils.Wrap(
		g.DB.Where("group_id = ?", groupID).
			Model(&relation.GroupModel{}).
			Updates(map[string]any{"status": status}).
			Error,
		"",
	)
}

func (g *GroupGorm) Find(ctx context.Context, groupIDs []string) (groups []*relation.GroupModel, err error) {
	return groups, utils.Wrap(g.DB.Where("group_id in (?)", groupIDs).Find(&groups).Error, "")
}

func (g *GroupGorm) Take(ctx context.Context, groupID string) (group *relation.GroupModel, err error) {
	group = &relation.GroupModel{}
	return group, utils.Wrap(g.DB.Where("group_id = ?", groupID).Take(group).Error, "")
}

func (g *GroupGorm) Search(
	ctx context.Context,
	keyword string,
	pageNumber, showNumber int32,
) (total uint32, groups []*relation.GroupModel, err error) {
	return ormutil.GormSearch[relation.GroupModel](g.DB, []string{"name"}, keyword, pageNumber, showNumber)
}

func (g *GroupGorm) GetGroupIDsByGroupType(ctx context.Context, groupType int) (groupIDs []string, err error) {
	return groupIDs, utils.Wrap(
		g.DB.Model(&relation.GroupModel{}).Where("group_type = ? ", groupType).Pluck("group_id", &groupIDs).Error,
		"",
	)
}

func (g *GroupGorm) CountTotal(ctx context.Context, before *time.Time) (count int64, err error) {
	db := g.db(ctx).Model(&relation.GroupModel{})
	if before != nil {
		db = db.Where("create_time < ?", before)
	}
	if err := db.Count(&count).Error; err != nil {
		return 0, err
	}
	return count, nil
}

func (g *GroupGorm) CountRangeEverydayTotal(
	ctx context.Context,
	start time.Time,
	end time.Time,
) (map[string]int64, error) {
	var res []struct {
		Date  time.Time `gorm:"column:date"`
		Count int64     `gorm:"column:count"`
	}
	err := g.db(ctx).
		Model(&relation.GroupModel{}).
		Select("DATE(create_time) AS date, count(1) AS count").
		Where("create_time >= ? and create_time < ?", start, end).
		Group("date").
		Find(&res).
		Error
	if err != nil {
		return nil, errs.Wrap(err)
	}
	v := make(map[string]int64)
	for _, r := range res {
		v[r.Date.Format("2006-01-02")] = r.Count
	}
	return v, nil
}