// Package sys
// @Link  https://github.com/bufanyun/hotgo
// @Copyright  Copyright (c) 2026 HotGo
// @Author  Ms <133814250@qq.com>
// @License  https://github.com/bufanyun/hotgo/blob/master/LICENSE
package sys

import (
	"context"
	"encoding/json"
	"fmt"
	"hotgo/internal/consts"
	"hotgo/internal/library/contexts"
	"hotgo/internal/library/imkafka"
	"hotgo/internal/library/imtenant"
	"hotgo/internal/model/input/sysin"
	"hotgo/internal/service"
	"strconv"

	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/os/gctx"
	"github.com/gogf/gf/v2/os/gtime"
	"github.com/gogf/gf/v2/util/guid"
)

type sSysImGroup struct{}

const (
	imGroupModeMember = "JRWPS"
	imGroupModeAdmin  = "JRWPASO"
	imGroupModeOwner  = "JRWPASDO"
)

func NewSysImGroup() *sSysImGroup {
	return &sSysImGroup{}
}

func init() {
	service.RegisterSysImGroup(NewSysImGroup())
}

// List 获取IM群组列表
func (s *sSysImGroup) List(ctx context.Context, in *sysin.ImGroupListInp) (list []*sysin.ImGroupListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}

	db, tenant, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}

	mod := s.groupModel(ctx, db, tenant.Id)
	mod = s.applyGroupWhere(mod, in)
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("t.touchedat").OrderDesc("t.id")

	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群组列表失败，请稍后重试！")
		return
	}
	for _, item := range list {
		item.TenantId = tenant.Id
		item.TenantName = tenant.Name
	}
	return
}

func (s *sSysImGroup) groupModel(ctx context.Context, db gdb.DB, tenantId int64) *gdb.Model {
	return db.Model(tenantTablePrefix(tenantId)+"topics t").Safe().Ctx(ctx).
		LeftJoin("im_group_settings gs", "gs.tenant_id = t.tenant_id AND gs.topic = t.name").
		LeftJoin("im_users owner", "owner.tenant_id = t.tenant_id AND owner.id = COALESCE(gs.owner_user_id, t.owner)").
		LeftJoin("im_user_profiles owner_profile", "owner_profile.tenant_id = t.tenant_id AND owner_profile.user_id = COALESCE(gs.owner_user_id, t.owner)").
		Fields(
			"t.name topic",
			"t.state",
			"COALESCE(gs.owner_user_id, t.owner) owner_id",
			"COALESCE(NULLIF(owner_profile.nickname, ''), owner.username, '') owner_nickname",
			"COALESCE(owner.username, '') owner_username",
			"t.seqid seq_id",
			"t.delid del_id",
			"t.subcnt sub_cnt",
			"t.touchedat touched_at",
			"t.createdat created_at",
			"t.updatedat updated_at",
			"t.public public_json",
			"t.trusted trusted_json",
			"t.tags tags_json",
			"t.aux aux_json",
			"COALESCE(NULLIF(gs.name, ''), NULLIF(JSON_UNQUOTE(JSON_EXTRACT(t.public, '$.fn')), ''), NULLIF(JSON_UNQUOTE(JSON_EXTRACT(t.public, '$.name')), ''), t.name) group_name",
			"COALESCE(gs.avatar_file_id, '') avatar_file_id",
			"COALESCE(gs.description, '') description",
			"COALESCE(gs.group_status, '') group_status",
			"COALESCE(gs.join_approval, 0) join_approval",
			"COALESCE(gs.mute_all, 0) mute_all",
			"COALESCE(gs.member_upload_files, 0) member_upload_files",
			"COALESCE(gs.member_private_chat, 0) member_private_chat",
			"COALESCE(gs.member_invite, 0) member_invite",
			"COALESCE(gs.max_member_count, 0) max_member_count",
			"COALESCE(gs.max_admin_count, 0) max_admin_count",
			"COALESCE(gs.member_count, 0) business_member_count",
			"COALESCE(gs.version, 0) settings_version",
			"gs.updated_at settings_updated_at",
		).
		Where("t.tenant_id", tenantId).
		WhereLike("t.name", "grp%")
}

func (s *sSysImGroup) applyGroupWhere(mod *gdb.Model, in *sysin.ImGroupListInp) *gdb.Model {
	if in.Topic != "" {
		mod = mod.WhereLike("t.name", "%"+in.Topic+"%")
	}
	if in.OwnerId > 0 {
		mod = mod.Where("COALESCE(gs.owner_user_id, t.owner)", in.OwnerId)
	}
	if in.State != nil {
		mod = mod.Where("t.state", *in.State)
	}
	if in.GroupStatus != "" {
		mod = mod.Where("gs.group_status", in.GroupStatus)
	}
	if len(in.CreatedAt) == 2 {
		mod = mod.WhereBetween("t.createdat", in.CreatedAt[0], in.CreatedAt[1])
	}
	if len(in.TouchedAt) == 2 {
		mod = mod.WhereBetween("t.touchedat", in.TouchedAt[0], in.TouchedAt[1])
	}
	return mod
}

// View 获取IM群组指定信息
func (s *sSysImGroup) View(ctx context.Context, in *sysin.ImGroupViewInp) (res *sysin.ImGroupViewModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}

	db, tenant, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}

	err = db.Model(tenantTablePrefix(tenant.Id)+"topics t").Safe().Ctx(ctx).
		LeftJoin("im_group_settings gs", "gs.tenant_id = t.tenant_id AND gs.topic = t.name").
		LeftJoin("im_users owner", "owner.tenant_id = t.tenant_id AND owner.id = COALESCE(gs.owner_user_id, t.owner)").
		LeftJoin("im_user_profiles owner_profile", "owner_profile.tenant_id = t.tenant_id AND owner_profile.user_id = COALESCE(gs.owner_user_id, t.owner)").
		Fields(
			"t.name topic",
			"t.state",
			"COALESCE(gs.owner_user_id, t.owner) owner_id",
			"COALESCE(NULLIF(owner_profile.nickname, ''), owner.username, '') owner_nickname",
			"COALESCE(owner.username, '') owner_username",
			"t.seqid seq_id",
			"t.delid del_id",
			"t.subcnt sub_cnt",
			"t.touchedat touched_at",
			"t.createdat created_at",
			"t.updatedat updated_at",
			"t.public public_json",
			"t.trusted trusted_json",
			"t.tags tags_json",
			"t.aux aux_json",
			"t.access access_json",
			"t.usebt use_bt",
			"COALESCE(NULLIF(gs.name, ''), NULLIF(JSON_UNQUOTE(JSON_EXTRACT(t.public, '$.fn')), ''), NULLIF(JSON_UNQUOTE(JSON_EXTRACT(t.public, '$.name')), ''), t.name) group_name",
			"COALESCE(gs.avatar_file_id, '') avatar_file_id",
			"COALESCE(gs.description, '') description",
			"COALESCE(gs.group_status, '') group_status",
			"COALESCE(gs.join_approval, 0) join_approval",
			"COALESCE(gs.mute_all, 0) mute_all",
			"COALESCE(gs.member_upload_files, 0) member_upload_files",
			"COALESCE(gs.member_private_chat, 0) member_private_chat",
			"COALESCE(gs.member_invite, 0) member_invite",
			"COALESCE(gs.max_member_count, 0) max_member_count",
			"COALESCE(gs.max_admin_count, 0) max_admin_count",
			"COALESCE(gs.member_count, 0) business_member_count",
			"COALESCE(gs.version, 0) settings_version",
			"gs.updated_at settings_updated_at",
		).
		Where("t.tenant_id", tenant.Id).
		Where("t.name", in.Topic).
		WhereLike("t.name", "grp%").
		Scan(&res)
	if err != nil {
		return nil, gerror.Wrap(err, "获取IM群组信息失败，请稍后重试！")
	}
	if res == nil {
		return nil, nil
	}
	res.TenantId = tenant.Id
	res.TenantName = tenant.Name
	return
}

// MemberList 获取IM群成员列表
func (s *sSysImGroup) MemberList(ctx context.Context, in *sysin.ImGroupMemberListInp) (list []*sysin.ImGroupMemberListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}

	db, tenant, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}

	if s.hasGroupMemberTruth(ctx, db, tenant.Id, in.Topic) {
		return s.memberListFromBusiness(ctx, db, tenant.Id, in)
	}
	return s.memberListFromProjection(ctx, db, tenant.Id, in)
}

func (s *sSysImGroup) hasGroupMemberTruth(ctx context.Context, db gdb.DB, tenantId int64, topic string) bool {
	count, err := db.Model(tenantTablePrefix(tenantId)+"group_members").Safe().Ctx(ctx).Where("tenant_id", tenantId).Where("topic", topic).Count()
	return err == nil && count > 0
}

func (s *sSysImGroup) memberListFromBusiness(ctx context.Context, db gdb.DB, tenantId int64, in *sysin.ImGroupMemberListInp) (list []*sysin.ImGroupMemberListModel, totalCount int, err error) {
	mod := db.Model(tenantTablePrefix(tenantId)+"group_members gm").Safe().Ctx(ctx).
		LeftJoin("im_users u", "u.tenant_id = gm.tenant_id AND u.id = gm.user_id").
		LeftJoin("im_user_profiles up", "up.tenant_id = gm.tenant_id AND up.user_id = gm.user_id").
		LeftJoin(tenantTablePrefix(tenantId)+"subscriptions s", "s.tenant_id = gm.tenant_id AND s.topic = gm.topic AND s.userid = gm.user_id").
		Fields(
			"gm.user_id",
			"up.nickname",
			"u.state",
			"s.modewant mode_want",
			"s.modegiven mode_given",
			"s.recvseqid recv_seq_id",
			"s.readseqid read_seq_id",
			"s.delid del_id",
			"s.deletedat deleted_at",
			"s.createdat created_at",
			"s.updatedat updated_at",
			"s.private private_json",
			"gm.role",
			"gm.member_status",
			"gm.nickname group_nickname",
			"gm.pinned",
			"gm.mute_notifications",
			"gm.join_source",
			"gm.joined_by",
			"gm.joined_at",
			"gm.left_at",
			"gm.removed_by",
			"gm.version",
		).
		Where("gm.tenant_id", tenantId).
		Where("gm.topic", in.Topic)
	if in.UserId > 0 {
		mod = mod.Where("gm.user_id", in.UserId)
	}
	if in.Role != "" {
		mod = mod.Where("gm.role", in.Role)
	}
	if in.MemberStatus != "" {
		mod = mod.Where("gm.member_status", in.MemberStatus)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderAsc("gm.member_status").OrderAsc("gm.role").OrderAsc("gm.id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群成员列表失败，请稍后重试！")
		return
	}
	return
}

func (s *sSysImGroup) memberListFromProjection(ctx context.Context, db gdb.DB, tenantId int64, in *sysin.ImGroupMemberListInp) (list []*sysin.ImGroupMemberListModel, totalCount int, err error) {
	mod := db.Model(tenantTablePrefix(tenantId)+"subscriptions s").Safe().Ctx(ctx).
		LeftJoin("im_users u", "u.tenant_id = s.tenant_id AND u.id = s.userid").
		LeftJoin("im_user_profiles up", "up.tenant_id = s.tenant_id AND up.user_id = s.userid").
		Fields(
			"s.userid user_id",
			"up.nickname",
			"u.state",
			"s.modewant mode_want",
			"s.modegiven mode_given",
			"s.recvseqid recv_seq_id",
			"s.readseqid read_seq_id",
			"s.delid del_id",
			"s.deletedat deleted_at",
			"s.createdat created_at",
			"s.updatedat updated_at",
			"s.private private_json",
			"'member' role",
			"IF(s.deletedat IS NULL, 'active', 'left') member_status",
			"'' group_nickname",
			"0 pinned",
			"0 mute_notifications",
			"'projection' join_source",
			"0 joined_by",
			"s.createdat joined_at",
			"s.deletedat left_at",
			"0 removed_by",
			"0 version",
		).
		Where("s.tenant_id", tenantId).
		Where("s.topic", in.Topic)

	if in.UserId > 0 {
		mod = mod.Where("s.userid", in.UserId)
	}

	mod = mod.Page(in.Page, in.PerPage).OrderAsc("s.deletedat").OrderAsc("s.userid")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群成员列表失败，请稍后重试！")
		return
	}
	return
}

// Governance 获取IM群治理配置
func (s *sSysImGroup) Governance(ctx context.Context, in *sysin.ImGroupTopicInp) (res *sysin.ImGroupGovernanceModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, tenant, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return nil, err
	}
	err = db.Model("im_group_settings").Safe().Ctx(ctx).
		Fields(
			"topic",
			"owner_user_id",
			"name",
			"avatar_file_id",
			"description",
			"group_status",
			"join_approval",
			"mute_all",
			"member_upload_files",
			"member_private_chat",
			"member_invite",
			"max_member_count",
			"max_admin_count",
			"member_count",
			"version",
			"created_by",
			"dissolved_by",
			"dissolved_at",
			"created_at",
			"updated_at",
		).
		Where("tenant_id", tenant.Id).
		Where("topic", in.Topic).
		Scan(&res)
	if err != nil {
		return nil, gerror.Wrap(err, "获取IM群治理配置失败，请稍后重试！")
	}
	if res == nil {
		return nil, nil
	}
	res.TenantId = tenant.Id
	res.TenantName = tenant.Name
	return
}

// GovernanceUpdate 更新IM群治理配置
func (s *sSysImGroup) GovernanceUpdate(ctx context.Context, in *sysin.ImGroupGovernanceUpdateInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"governance": map[string]any{
			"join_approval":       in.JoinApproval == 1,
			"mute_all":            in.MuteAll == 1,
			"member_upload_files": in.MemberUploadFiles == 1,
			"member_private_chat": in.MemberPrivateChat == 1,
			"member_invite":       in.MemberInvite == 1,
			"max_member_count":    in.MaxMemberCount,
			"max_admin_count":     in.MaxAdminCount,
		},
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupGovernUpdate, payload, 0)
}

func (s *sSysImGroup) ProfileUpdate(ctx context.Context, in *sysin.ImGroupProfileUpdateInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"profile": map[string]any{
			"name":           in.Name,
			"avatar_file_id": in.AvatarFileId,
			"description":    in.Description,
		},
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupProfileUpdate, payload, in.Version)
}

// Dissolve 解散IM群
func (s *sSysImGroup) Dissolve(ctx context.Context, in *sysin.ImGroupDissolveInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"reason":        in.Reason,
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupDissolve, payload, 0)
}

// Mute 禁言IM群成员
func (s *sSysImGroup) Mute(ctx context.Context, in *sysin.ImGroupMuteInp) (res *sysin.ImGroupCommandModel, err error) {
	return s.MemberMute(ctx, in)
}

func (s *sSysImGroup) MemberMute(ctx context.Context, in *sysin.ImGroupMuteInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"user_id":       strconv.FormatInt(in.UserId, 10),
		"reason":        in.Reason,
	}
	if in.ExpiresAt != nil {
		payload["expires_at"] = in.ExpiresAt.Time.Format("2006-01-02T15:04:05.000Z07:00")
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupMemberMute, payload, 0)
}

// Unmute 解除IM群成员禁言
func (s *sSysImGroup) Unmute(ctx context.Context, in *sysin.ImGroupUnmuteInp) (res *sysin.ImGroupCommandModel, err error) {
	return s.MemberUnmute(ctx, in)
}

func (s *sSysImGroup) MemberUnmute(ctx context.Context, in *sysin.ImGroupUnmuteInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"user_id":       strconv.FormatInt(in.UserId, 10),
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupMemberUnmute, payload, 0)
}

func (s *sSysImGroup) MemberRemove(ctx context.Context, in *sysin.ImGroupMemberRemoveInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"user_id":       strconv.FormatInt(in.UserId, 10),
		"reason":        in.Reason,
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupMemberRemove, payload, 0)
}

// JoinRequestApprove 通过IM入群申请
func (s *sSysImGroup) JoinRequestApprove(ctx context.Context, in *sysin.ImGroupJoinRequestResolveInp) (err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	return s.resolveJoinRequest(ctx, in, consts.ImGroupRequestStatusAccepted)
}

// JoinRequestReject 拒绝IM入群申请
func (s *sSysImGroup) JoinRequestReject(ctx context.Context, in *sysin.ImGroupJoinRequestResolveInp) (err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	return s.resolveJoinRequest(ctx, in, consts.ImGroupRequestStatusRejected)
}

func (s *sSysImGroup) resolveJoinRequest(ctx context.Context, in *sysin.ImGroupJoinRequestResolveInp, status string) (err error) {
	db, tenant, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return err
	}
	actor := contexts.GetUserId(ctx)
	requestId := gctx.CtxId(ctx)
	if requestId == "" {
		requestId = guid.S()
	}
	now := gtime.Now()
	return db.Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
		if err := s.ensureActiveGroup(ctx, tx, in.Topic); err != nil {
			return err
		}
		before, txErr := s.groupJoinRequestSnapshot(ctx, tx, in.Topic, in.RequestId)
		if txErr != nil {
			return txErr
		}
		if before == nil {
			return gerror.New("入群申请不存在")
		}
		if before["status"].String() != consts.ImGroupRequestStatusPending {
			return gerror.New("入群申请已处理")
		}
		applicantUserId := before["applicant_user_id"].Int64()
		if status == consts.ImGroupRequestStatusAccepted {
			if txErr = s.upsertGroupSubscription(ctx, tx, tenant.Id, in.Topic, applicantUserId, imGroupModeMember, now); txErr != nil {
				return txErr
			}
			if txErr = s.upsertGroupMember(ctx, tx, tenant.Id, in.Topic, applicantUserId, consts.ImGroupRoleMember, "approval", actor, now); txErr != nil {
				return txErr
			}
		}
		result, txErr := tx.Exec(`UPDATE im_group_join_requests
			SET status=?,reject_reason=?,handled_by=?,handled_at=?,updated_at=?,version=version+1
			WHERE topic=? AND request_id=? AND status=?`,
			status, in.RejectReason, actor, now, now, in.Topic, in.RequestId, consts.ImGroupRequestStatusPending)
		if txErr != nil {
			return txErr
		}
		if affected, _ := result.RowsAffected(); affected == 0 {
			return gerror.New("入群申请已处理")
		}
		if txErr = s.recountGroupMembers(ctx, tx, tenant.Id, in.Topic); txErr != nil {
			return txErr
		}
		after, txErr := s.groupJoinRequestSnapshot(ctx, tx, in.Topic, in.RequestId)
		if txErr != nil {
			return txErr
		}
		action := "join_request_reject"
		if status == consts.ImGroupRequestStatusAccepted {
			action = "join_request_accept"
		}
		if txErr = s.insertGroupAdminLog(ctx, tx, in.Topic, actor, applicantUserId, action, "join_request", in.RequestId, recordMap(before), recordMap(after), requestId); txErr != nil {
			return txErr
		}
		return s.insertGroupEvent(ctx, tx, in.Topic, actor, "group.join_request."+status, g.Map{
			"topic": in.Topic, "request_id": in.RequestId, "applicant_user_id": applicantUserId, "status": status, "request_id_admin": requestId,
		})
	})
}

// RoleUpdate 更新IM群成员角色
func (s *sSysImGroup) RoleUpdate(ctx context.Context, in *sysin.ImGroupRoleUpdateInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	switch in.Role {
	case consts.ImGroupRoleAdmin:
		return s.AdminSet(ctx, in)
	case consts.ImGroupRoleMember:
		return s.AdminRemove(ctx, in)
	default:
		return nil, gerror.New("只能设置管理员或普通成员")
	}
}

func (s *sSysImGroup) AdminSet(ctx context.Context, in *sysin.ImGroupRoleUpdateInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"user_ids":      []string{strconv.FormatInt(in.UserId, 10)},
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupAdminSet, payload, 0)
}

func (s *sSysImGroup) AdminRemove(ctx context.Context, in *sysin.ImGroupRoleUpdateInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":         in.Topic,
		"actor_user_id": strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"user_id":       strconv.FormatInt(in.UserId, 10),
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupAdminRemove, payload, 0)
}

// OwnerTransfer 转让IM群主
func (s *sSysImGroup) OwnerTransfer(ctx context.Context, in *sysin.ImGroupOwnerTransferInp) (res *sysin.ImGroupCommandModel, err error) {
	if err = in.Filter(ctx); err != nil {
		return nil, err
	}
	payload := map[string]any{
		"topic":          in.Topic,
		"actor_user_id":  strconv.FormatInt(contexts.GetUserId(ctx), 10),
		"target_user_id": strconv.FormatInt(in.UserId, 10),
	}
	return s.publishGroupCommand(ctx, in.TenantId, in.Topic, consts.ImAdminCommandGroupOwnerTransfer, payload, 0)
}

func (s *sSysImGroup) publishGroupCommand(ctx context.Context, tenantId int64, topic string, eventType string, payload map[string]any, version int64) (*sysin.ImGroupCommandModel, error) {
	_, tenant, err := resolveImTenantDB(ctx, tenantId)
	if err != nil {
		return nil, err
	}
	user := contexts.GetUser(ctx)
	actorName := ""
	if user != nil {
		actorName = user.RealName
	}
	command, err := imkafka.PublishAdminCommand(ctx, imkafka.AdminCommandInput{
		TenantID:   tenant.Id,
		TenantCode: tenant.Code,
		EventType:  eventType,
		BizType:    "group",
		BizID:      topic,
		Version:    version,
		Actor: &imkafka.Actor{
			Type:        "admin",
			ID:          strconv.FormatInt(contexts.GetUserId(ctx), 10),
			DisplayName: actorName,
		},
		Payload:   payload,
		CreatedBy: contexts.GetUserId(ctx),
	})
	if err != nil {
		return nil, err
	}
	return &sysin.ImGroupCommandModel{
		CommandID:      command.CommandID,
		EventID:        command.EventID,
		Status:         command.Status,
		TenantID:       command.TenantID,
		TenantCode:     command.TenantCode,
		EventType:      command.EventType,
		IdempotencyKey: command.IdempotencyKey,
	}, nil
}

func (s *sSysImGroup) groupGovernanceSnapshot(ctx context.Context, tx gdb.TX, topic string) (res gdb.Record, err error) {
	return tx.Model("im_group_settings").Safe().Ctx(ctx).
		Fields(
			"topic", "owner_user_id", "name", "group_status", "join_approval", "mute_all",
			"member_upload_files", "member_private_chat", "member_invite", "max_member_count",
			"max_admin_count", "member_count", "version", "created_by", "dissolved_by",
			"dissolved_at", "created_at", "updated_at",
		).
		Where("topic", topic).
		One()
}

func (s *sSysImGroup) groupJoinRequestSnapshot(ctx context.Context, tx gdb.TX, topic string, requestId string) (res gdb.Record, err error) {
	return tx.Model("im_group_join_requests").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("request_id", requestId).
		One()
}

func (s *sSysImGroup) groupMemberSnapshot(ctx context.Context, tx gdb.TX, tenantId int64, topic string, userId int64) (res gdb.Record, err error) {
	return tx.Model(tenantTablePrefix(tenantId)+"group_members").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("user_id", userId).
		One()
}

func (s *sSysImGroup) groupFileSnapshot(ctx context.Context, tx gdb.TX, topic string, groupFileId string) (res gdb.Record, err error) {
	return tx.Model("im_group_files").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("group_file_id", groupFileId).
		One()
}

func (s *sSysImGroup) ensureActiveGroup(ctx context.Context, tx gdb.TX, topic string) error {
	status, err := tx.Model("im_group_settings").Safe().Ctx(ctx).Where("topic", topic).Value("group_status")
	if err != nil {
		return err
	}
	if status.IsNil() {
		return gerror.New("群治理配置不存在")
	}
	if status.String() == consts.ImGroupStatusDissolved {
		return gerror.New("已解散群不能执行该操作")
	}
	return nil
}

func (s *sSysImGroup) groupMuteSnapshot(ctx context.Context, tx gdb.TX, topic string, userId int64) (res gdb.Record, err error) {
	return tx.Model("im_group_mutes").Safe().Ctx(ctx).
		Fields(
			"topic", "user_id", "muted_by", "muted_at", "expires_at", "reason", "status",
			"revoked_by", "revoked_at", "version", "created_at", "updated_at",
		).
		Where("topic", topic).
		Where("user_id", userId).
		One()
}

func (s *sSysImGroup) ensureActiveGroupMember(ctx context.Context, tx gdb.TX, tenantId int64, topic string, userId int64) error {
	count, err := tx.Model(tenantTablePrefix(tenantId)+"group_members").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("user_id", userId).
		Where("member_status", consts.ImGroupMemberStatusActive).
		Count()
	if err != nil {
		return err
	}
	if count == 0 {
		return gerror.New("成员不在群内或不是正常状态")
	}
	return nil
}

func (s *sSysImGroup) ensureAdminLimit(ctx context.Context, tx gdb.TX, tenantId int64, topic string, userId int64) error {
	currentRole, err := tx.Model(tenantTablePrefix(tenantId)+"group_members").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("user_id", userId).
		Where("member_status", consts.ImGroupMemberStatusActive).
		Value("role")
	if err != nil {
		return err
	}
	if currentRole.String() == consts.ImGroupRoleAdmin {
		return nil
	}
	maxAdminCount, err := tx.Model("im_group_settings").Safe().Ctx(ctx).Where("topic", topic).Value("max_admin_count")
	if err != nil {
		return err
	}
	if maxAdminCount.Int() <= 0 {
		return nil
	}
	adminCount, err := tx.Model(tenantTablePrefix(tenantId)+"group_members").Safe().Ctx(ctx).
		Where("topic", topic).
		Where("role", consts.ImGroupRoleAdmin).
		Where("member_status", consts.ImGroupMemberStatusActive).
		Count()
	if err != nil {
		return err
	}
	if adminCount >= maxAdminCount.Int() {
		return gerror.New("群管理员数量已达上限")
	}
	return nil
}

func (s *sSysImGroup) upsertGroupSubscription(ctx context.Context, tx gdb.TX, tenantId int64, topic string, userId int64, modeGiven string, now *gtime.Time) error {
	table := tenantTablePrefix(tenantId) + "subscriptions"
	_, err := tx.Exec(fmt.Sprintf(`INSERT INTO %s(tenant_id,createdat,updatedat,deletedat,userid,topic,modewant,modegiven,private)
		VALUES(?,?,?,NULL,?,?,?,?,CAST('{}' AS JSON))
		ON DUPLICATE KEY UPDATE createdat=VALUES(createdat),updatedat=VALUES(updatedat),deletedat=NULL,
		modewant=VALUES(modewant),modegiven=VALUES(modegiven),delid=0,recvseqid=0,readseqid=0`, table),
		tenantId, now, now, userId, topic, imGroupModeMember, modeGiven)
	return err
}

func (s *sSysImGroup) upsertGroupMember(ctx context.Context, tx gdb.TX, tenantId int64, topic string, userId int64, role string, joinSource string, joinedBy int64, now *gtime.Time) error {
	table := tenantTablePrefix(tenantId) + "group_members"
	_, err := tx.Exec(fmt.Sprintf(`INSERT INTO %s(tenant_id,topic,user_id,role,member_status,join_source,joined_by,joined_at,version,created_at,updated_at)
		VALUES(?,?,?,?,?,?,?,?,?,?,?)
		ON DUPLICATE KEY UPDATE role=VALUES(role),member_status=VALUES(member_status),join_source=VALUES(join_source),
		joined_by=VALUES(joined_by),joined_at=VALUES(joined_at),left_at=NULL,removed_by=NULL,version=version+1,updated_at=VALUES(updated_at)`, table),
		tenantId, topic, userId, role, consts.ImGroupMemberStatusActive, joinSource, joinedBy, now, 1, now, now)
	return err
}

func (s *sSysImGroup) recountGroupMembers(ctx context.Context, tx gdb.TX, tenantId int64, topic string) error {
	membersTable := tenantTablePrefix(tenantId) + "group_members"
	subscriptionsTable := tenantTablePrefix(tenantId) + "subscriptions"
	topicsTable := tenantTablePrefix(tenantId) + "topics"
	if _, err := tx.Exec(fmt.Sprintf(`UPDATE im_group_settings
		SET member_count=(SELECT COUNT(*) FROM %s WHERE tenant_id=? AND topic=? AND member_status=?),updated_at=CURRENT_TIMESTAMP(3)
		WHERE tenant_id=? AND topic=?`, membersTable), tenantId, topic, consts.ImGroupMemberStatusActive, tenantId, topic); err != nil {
		return err
	}
	_, err := tx.Exec(fmt.Sprintf(`UPDATE %s
		SET subcnt=(SELECT COUNT(*) FROM %s WHERE tenant_id=? AND topic=? AND deletedat IS NULL),updatedat=CURRENT_TIMESTAMP(3)
		WHERE tenant_id=? AND name=?`, topicsTable, subscriptionsTable), tenantId, topic, tenantId, topic)
	return err
}

func recordMap(record gdb.Record) any {
	if record == nil {
		return nil
	}
	return record.Map()
}

func (s *sSysImGroup) insertGroupAdminLog(ctx context.Context, tx gdb.TX, topic string, operatorId int64, targetUserId int64, action string, objectType string, objectId string, beforeData any, afterData any, requestId string) error {
	id, err := imtenant.NextSnowflakeID(ctx)
	if err != nil {
		return gerror.Wrap(err, "生成群管理日志ID失败")
	}
	logId := fmt.Sprintf("gal_%d", id)
	beforeJson, _ := json.Marshal(beforeData)
	afterJson, _ := json.Marshal(afterData)
	_, err = tx.Exec(`INSERT INTO im_group_admin_logs
		(log_id,topic,operator_id,target_user_id,action,object_type,object_id,before_data,after_data,request_id,idempotency_key)
		VALUES(?,?,?,?,?,?,?,CAST(? AS JSON),CAST(? AS JSON),?,?)`,
		logId, topic, operatorId, targetUserId, action, objectType, objectId, string(beforeJson), string(afterJson), requestId, requestId)
	return err
}

func (s *sSysImGroup) insertGroupEvent(ctx context.Context, tx gdb.TX, topic string, actorId int64, eventType string, payload any) error {
	id, err := imtenant.NextSnowflakeID(ctx)
	if err != nil {
		return gerror.Wrap(err, "生成群事件ID失败")
	}
	payloadJson, _ := json.Marshal(payload)
	_, err = tx.Exec(`INSERT INTO im_group_events_outbox
		(event_id,topic,actor_user_id,event_type,payload,status)
		VALUES(?,?,?,?,CAST(? AS JSON),'pending')`,
		fmt.Sprintf("gev_%d", id), topic, actorId, eventType, string(payloadJson))
	return err
}

// JoinRequestList 获取IM入群申请列表
func (s *sSysImGroup) JoinRequestList(ctx context.Context, in *sysin.ImGroupJoinRequestListInp) (list []*sysin.ImGroupJoinRequestListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_join_requests").Safe().Ctx(ctx).Where("topic", in.Topic)
	if in.Status != "" {
		mod = mod.Where("status", in.Status)
	}
	if in.ApplicantUserId > 0 {
		mod = mod.Where("applicant_user_id", in.ApplicantUserId)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM入群申请列表失败，请稍后重试！")
	}
	return
}

// FileList 获取IM群文件列表
func (s *sSysImGroup) FileList(ctx context.Context, in *sysin.ImGroupFileListInp) (list []*sysin.ImGroupFileListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_files").Safe().Ctx(ctx).Where("topic", in.Topic)
	if in.Status != "" {
		mod = mod.Where("status", in.Status)
	}
	if in.FileType != "" {
		mod = mod.Where("file_type", in.FileType)
	}
	if in.FileName != "" {
		mod = mod.WhereLike("file_name", "%"+in.FileName+"%")
	}
	if in.UploaderId > 0 {
		mod = mod.Where("uploader_id", in.UploaderId)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群文件列表失败，请稍后重试！")
	}
	return
}

// FileDelete 删除IM群文件
func (s *sSysImGroup) FileDelete(ctx context.Context, in *sysin.ImGroupFileDeleteInp) (err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return err
	}
	actor := contexts.GetUserId(ctx)
	requestId := gctx.CtxId(ctx)
	if requestId == "" {
		requestId = guid.S()
	}
	now := gtime.Now()
	return db.Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
		if err := s.ensureActiveGroup(ctx, tx, in.Topic); err != nil {
			return err
		}
		before, txErr := s.groupFileSnapshot(ctx, tx, in.Topic, in.GroupFileId)
		if txErr != nil {
			return txErr
		}
		if before == nil {
			return gerror.New("群文件不存在")
		}
		if before["status"].String() == consts.ImGroupFileStatusDeleted {
			return gerror.New("群文件已删除")
		}
		result, txErr := tx.Exec(`UPDATE im_group_files
			SET status=?,deleted_by=?,deleted_at=?,updated_at=?
			WHERE topic=? AND group_file_id=? AND status<>?`,
			consts.ImGroupFileStatusDeleted, actor, now, now, in.Topic, in.GroupFileId, consts.ImGroupFileStatusDeleted)
		if txErr != nil {
			return txErr
		}
		if affected, _ := result.RowsAffected(); affected == 0 {
			return gerror.New("群文件已删除")
		}
		after, txErr := s.groupFileSnapshot(ctx, tx, in.Topic, in.GroupFileId)
		if txErr != nil {
			return txErr
		}
		if txErr = s.insertGroupAdminLog(ctx, tx, in.Topic, actor, before["uploader_id"].Int64(), "group_file_delete", "group_file", in.GroupFileId, recordMap(before), recordMap(after), requestId); txErr != nil {
			return txErr
		}
		return s.insertGroupEvent(ctx, tx, in.Topic, actor, "group.file.deleted", g.Map{
			"topic": in.Topic, "group_file_id": in.GroupFileId, "file_id": before["file_id"].String(), "request_id": requestId,
		})
	})
}

// InvitationList 获取IM群邀请列表
func (s *sSysImGroup) InvitationList(ctx context.Context, in *sysin.ImGroupInvitationListInp) (list []*sysin.ImGroupInvitationListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_invitations").Safe().Ctx(ctx).Where("topic", in.Topic)
	if in.Status != "" {
		mod = mod.Where("status", in.Status)
	}
	if in.TargetUserId > 0 {
		mod = mod.Where("target_user_id", in.TargetUserId)
	}
	if in.InviterUserId > 0 {
		mod = mod.Where("inviter_user_id", in.InviterUserId)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群邀请列表失败，请稍后重试！")
	}
	return
}

// AnnouncementList 获取IM群公告列表
func (s *sSysImGroup) AnnouncementList(ctx context.Context, in *sysin.ImGroupAnnouncementListInp) (list []*sysin.ImGroupAnnouncementListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_announcements").Safe().Ctx(ctx).Where("topic", in.Topic)
	if in.Status != "" {
		mod = mod.Where("status", in.Status)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("published_at").OrderDesc("id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群公告列表失败，请稍后重试！")
	}
	return
}

// MuteList 获取IM群禁言列表
func (s *sSysImGroup) MuteList(ctx context.Context, in *sysin.ImGroupMuteListInp) (list []*sysin.ImGroupMuteListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_mutes").Safe().Ctx(ctx).Where("topic", in.Topic)
	if in.Status != "" {
		mod = mod.Where("status", in.Status)
	}
	if in.UserId > 0 {
		mod = mod.Where("user_id", in.UserId)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("muted_at").OrderDesc("user_id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群禁言列表失败，请稍后重试！")
	}
	return
}

// AdminLogList 获取IM群管理日志列表
func (s *sSysImGroup) AdminLogList(ctx context.Context, in *sysin.ImGroupAdminLogListInp) (list []*sysin.ImGroupAdminLogListModel, totalCount int, err error) {
	if err = in.Filter(ctx); err != nil {
		return
	}
	db, _, err := resolveImTenantDB(ctx, in.TenantId)
	if err != nil {
		return
	}
	mod := db.Model("im_group_admin_logs").Safe().Ctx(ctx).
		Fields(
			"id",
			"log_id",
			"topic",
			"operator_id",
			"target_user_id",
			"action",
			"object_type",
			"object_id",
			"CAST(before_data AS CHAR) before_data",
			"CAST(after_data AS CHAR) after_data",
			"request_id",
			"idempotency_key",
			"created_at",
		).
		Where("topic", in.Topic)
	if in.Action != "" {
		mod = mod.WhereLike("action", "%"+in.Action+"%")
	}
	if in.OperatorId > 0 {
		mod = mod.Where("operator_id", in.OperatorId)
	}
	mod = mod.Page(in.Page, in.PerPage).OrderDesc("id")
	if err = mod.ScanAndCount(&list, &totalCount, false); err != nil {
		err = gerror.Wrap(err, "获取IM群管理日志列表失败，请稍后重试！")
	}
	return
}