package main

// team.go 团队协作：团队/成员/角色、团队任务（创建/指派/流转/催办）、
// 日报提交与 AI 摘要、团队通知。团队数据存共享 MySQL（在线操作，无本地镜像），
// 通知写 team_notices，各客户端在同步循环里增量拉取后转本地消息。
// 表结构见 init.sql；表缺失统一报 TEAM_SCHEMA_MISSING 提示升级服务器库。

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"regexp"
	"strings"
	"time"

	"github.com/go-sql-driver/mysql"

	"view/service"
	"view/service/ai"
)

// ---------- 结构 ----------

type TeamInfo struct {
	ID         int64  `json:"id"`
	Name       string `json:"name"`
	OwnerID    int64  `json:"ownerId"`
	DigestTime string `json:"digestTime"`
	Role       string `json:"role"`
	Members    int    `json:"members"`
	Current    bool   `json:"current"`
}

type TeamMember struct {
	UserID   int64    `json:"userId"`
	Username string   `json:"username"`
	Nickname string   `json:"nickname"`
	Title    string   `json:"title"`
	Bio      string   `json:"bio"`
	TechTags []string `json:"techTags"`
	Avatar   string   `json:"avatar"`
	Role     string   `json:"role"`
	JoinedAt string   `json:"joinedAt"`
}

type TeamTask struct {
	ID          int64  `json:"id"`
	TeamID      int64  `json:"teamId"`
	Kind        string `json:"kind"` // todo | ticket
	Title       string `json:"title"`
	Description string `json:"description"`
	Priority    string `json:"priority"`
	Status      string `json:"status"` // open | doing | done | closed
	CreatorID   int64  `json:"creatorId"`
	Creator     string `json:"creator"`
	AssigneeID  int64  `json:"assigneeId"`
	Assignee    string `json:"assignee"`
	StartAt     string `json:"startAt"`
	DueAt       string `json:"dueAt"`
	UrgedAt     string `json:"urgedAt"`
	History     string `json:"history"`
	UpdatedAt   string `json:"updatedAt"`
}

type TeamSharedItem struct {
	Kind      string `json:"kind"` // todo | ticket
	UUID      string `json:"uuid"`
	UserID    int64  `json:"userId"`
	Owner     string `json:"owner"`
	Title     string `json:"title"`
	Status    string `json:"status"`
	Priority  string `json:"priority"`
	DueAt     string `json:"dueAt"`
	UpdatedAt string `json:"updatedAt"`
}

type TeamReport struct {
	UserID      int64  `json:"userId"`
	User        string `json:"user"`
	Date        string `json:"date"`
	Content     string `json:"content"`
	SubmittedAt string `json:"submittedAt"`
}

type TeamDigest struct {
	Date        string `json:"date"`
	Content     string `json:"content"`
	Provider    string `json:"provider"`
	GeneratedAt string `json:"generatedAt"`
}

// TeamReportBoard 一天的日报全景：成员提交内容 + 未交名单 + AI 摘要。
type TeamReportBoard struct {
	Date    string       `json:"date"`
	Role    string       `json:"role"`
	Reports []TeamReport `json:"reports"`
	Missing []TeamMember `json:"missing"`
	Digest  *TeamDigest  `json:"digest"`
}

// ---------- 基础设施 ----------

var teamDateRe = regexp.MustCompile(`^\d{4}-\d{2}-\d{2}$`)

// mapTeamErr 把 MySQL 表/列缺失翻译为稳定错误码（服务器库未跑新版 init.sql）。
func mapTeamErr(e error) error {
	if e == nil {
		return nil
	}
	var me *mysql.MySQLError
	if errors.As(e, &me) && (me.Number == 1146 || me.Number == 1054) {
		return errors.New("TEAM_SCHEMA_MISSING")
	}
	return e
}

// teamConn 建立远端连接并校验登录态；调用方负责 cancel 与 db.Close。
func (a *App) teamConn() (context.Context, context.CancelFunc, *sql.DB, int64, error) {
	if e := a.ready(); e != nil {
		return nil, nil, nil, 0, e
	}
	uid := a.syncUserID()
	if uid <= 0 {
		return nil, nil, nil, 0, errors.New("SYNC_NOT_LOGGED_IN")
	}
	ctx, cancel := context.WithTimeout(context.Background(), syncTimeout)
	db, e := a.openRemote(ctx)
	if e != nil {
		cancel()
		return nil, nil, nil, 0, e
	}
	return ctx, cancel, db, uid, nil
}

func teamRoleRank(role string) int {
	switch role {
	case "owner":
		return 3
	case "admin":
		return 2
	case "member":
		return 1
	}
	return 0
}

// teamRole 查询用户在团队中的角色；非成员返回空串。
func teamRole(ctx context.Context, db *sql.DB, teamID, userID int64) (string, error) {
	var role string
	e := db.QueryRowContext(ctx, `SELECT role FROM team_members WHERE team_id=? AND user_id=?`, teamID, userID).Scan(&role)
	if e == sql.ErrNoRows {
		return "", nil
	}
	return role, mapTeamErr(e)
}

// requireTeamRole 校验最低角色，返回实际角色。
func requireTeamRole(ctx context.Context, db *sql.DB, teamID, userID int64, min string) (string, error) {
	role, e := teamRole(ctx, db, teamID, userID)
	if e != nil {
		return "", e
	}
	if teamRoleRank(role) < teamRoleRank(min) {
		return role, errors.New("TEAM_FORBIDDEN")
	}
	return role, nil
}

// teamDisplayExpr 成员展示名：资料昵称优先，回退账号名。
const teamDisplayExpr = `COALESCE(NULLIF(p.nickname,''), u.username)`

// teamNotice 写一条团队通知（自己给自己的跳过）。
func teamNotice(ctx context.Context, db *sql.DB, teamID, toUser, fromUser int64, kind, refID, content string) {
	if toUser <= 0 || toUser == fromUser {
		return
	}
	_, _ = db.ExecContext(ctx, `INSERT INTO team_notices(team_id,to_user,from_user,kind,ref_id,content,created_at) VALUES(?,?,?,?,?,?,?)`,
		teamID, toUser, fromUser, kind, refID, content, nowRFC())
}

// teamUserName 查用户展示名（昵称优先）。
func teamUserName(ctx context.Context, db *sql.DB, userID int64) string {
	var name string
	_ = db.QueryRowContext(ctx, `SELECT `+teamDisplayExpr+` FROM users u LEFT JOIN user_profiles p ON p.user_id=u.id WHERE u.id=?`, userID).Scan(&name)
	return name
}

// ---------- 团队 CRUD ----------

func (a *App) TeamCreate(name string) (TeamInfo, error) {
	name = strings.TrimSpace(name)
	if name == "" || len([]rune(name)) > 64 {
		return TeamInfo{}, errors.New("TEAM_NAME_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return TeamInfo{}, e
	}
	defer cancel()
	defer db.Close()
	res, e := db.ExecContext(ctx, `INSERT INTO teams(name,owner_id,digest_time,created_at) VALUES(?,?,?,?)`, name, uid, "21:00", nowRFC())
	if e != nil {
		return TeamInfo{}, mapTeamErr(e)
	}
	id, _ := res.LastInsertId()
	if _, e = db.ExecContext(ctx, `INSERT INTO team_members(team_id,user_id,role,joined_at) VALUES(?,?,?,?)`, id, uid, "owner", nowRFC()); e != nil {
		return TeamInfo{}, mapTeamErr(e)
	}
	_ = a.store.SetMeta("current_team_id", fmt.Sprint(id))
	a.store.Log("info", "团队", "团队创建成功", name)
	return TeamInfo{ID: id, Name: name, OwnerID: uid, DigestTime: "21:00", Role: "owner", Members: 1, Current: true}, nil
}

func (a *App) TeamList() ([]TeamInfo, error) {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return nil, e
	}
	defer cancel()
	defer db.Close()
	rows, e := db.QueryContext(ctx, `SELECT t.id,t.name,t.owner_id,t.digest_time,m.role,
		(SELECT COUNT(*) FROM team_members x WHERE x.team_id=t.id)
		FROM teams t JOIN team_members m ON m.team_id=t.id AND m.user_id=? ORDER BY t.id`, uid)
	if e != nil {
		return nil, mapTeamErr(e)
	}
	defer rows.Close()
	out := []TeamInfo{}
	for rows.Next() {
		var t TeamInfo
		if e = rows.Scan(&t.ID, &t.Name, &t.OwnerID, &t.DigestTime, &t.Role, &t.Members); e != nil {
			return nil, e
		}
		out = append(out, t)
	}
	if e = rows.Err(); e != nil {
		return nil, e
	}
	// 当前团队：meta 缺失或已不在列表中时自动落到第一个。
	cur := a.store.Meta("current_team_id")
	found := false
	for i := range out {
		if fmt.Sprint(out[i].ID) == cur {
			out[i].Current = true
			found = true
		}
	}
	if !found && len(out) > 0 {
		out[0].Current = true
		_ = a.store.SetMeta("current_team_id", fmt.Sprint(out[0].ID))
	}
	return out, nil
}

func (a *App) TeamSwitch(teamID int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "member"); e != nil {
		return e
	}
	if e := a.store.SetMeta("current_team_id", fmt.Sprint(teamID)); e != nil {
		return e
	}
	// 徽标口径跟随当前团队，切换后立即重算，不等下一轮同步。
	a.refreshTeamAssignedCache(ctx, db, uid)
	return nil
}

func (a *App) TeamRename(teamID int64, name string) error {
	name = strings.TrimSpace(name)
	if name == "" || len([]rune(name)) > 64 {
		return errors.New("TEAM_NAME_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "owner"); e != nil {
		return e
	}
	_, e = db.ExecContext(ctx, `UPDATE teams SET name=? WHERE id=?`, name, teamID)
	return mapTeamErr(e)
}

func (a *App) TeamSetDigestTime(teamID int64, at string) error {
	if _, ok := parseClockOK(at); !ok {
		return errors.New("TEAM_TIME_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	_, e = db.ExecContext(ctx, `UPDATE teams SET digest_time=? WHERE id=?`, at, teamID)
	return mapTeamErr(e)
}

// parseClockOK 校验 HH:MM 格式。
func parseClockOK(at string) (string, bool) {
	parts := strings.SplitN(at, ":", 2)
	if len(parts) != 2 {
		return "", false
	}
	var h, m int
	if _, e := fmt.Sscanf(at, "%d:%d", &h, &m); e != nil || h < 0 || h > 23 || m < 0 || m > 59 {
		return "", false
	}
	return at, true
}

func (a *App) TeamDissolve(teamID int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "owner"); e != nil {
		return e
	}
	var name string
	_ = db.QueryRowContext(ctx, `SELECT name FROM teams WHERE id=?`, teamID).Scan(&name)
	// 先通知成员再删数据。
	rows, e := db.QueryContext(ctx, `SELECT user_id FROM team_members WHERE team_id=?`, teamID)
	if e != nil {
		return mapTeamErr(e)
	}
	members := []int64{}
	for rows.Next() {
		var id int64
		if rows.Scan(&id) == nil {
			members = append(members, id)
		}
	}
	rows.Close()
	for _, m := range members {
		teamNotice(ctx, db, teamID, m, uid, "member", "", fmt.Sprintf("团队「%s」已被解散", name))
	}
	for _, q := range []string{
		`DELETE FROM team_tasks WHERE team_id=?`,
		`DELETE FROM team_reports WHERE team_id=?`,
		`DELETE FROM team_digests WHERE team_id=?`,
		`DELETE FROM team_members WHERE team_id=?`,
		`DELETE FROM teams WHERE id=?`,
	} {
		if _, e = db.ExecContext(ctx, q, teamID); e != nil {
			return mapTeamErr(e)
		}
	}
	if a.store.Meta("current_team_id") == fmt.Sprint(teamID) {
		_ = a.store.SetMeta("current_team_id", "")
	}
	a.refreshTeamAssignedCache(ctx, db, uid)
	a.store.Log("warning", "团队", "团队已解散", name)
	return nil
}

func (a *App) TeamLeave(teamID int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	role, e := requireTeamRole(ctx, db, teamID, uid, "member")
	if e != nil {
		return e
	}
	if role == "owner" {
		return errors.New("TEAM_OWNER_CANNOT_LEAVE")
	}
	if _, e = db.ExecContext(ctx, `DELETE FROM team_members WHERE team_id=? AND user_id=?`, teamID, uid); e != nil {
		return mapTeamErr(e)
	}
	var ownerID int64
	_ = db.QueryRowContext(ctx, `SELECT owner_id FROM teams WHERE id=?`, teamID).Scan(&ownerID)
	teamNotice(ctx, db, teamID, ownerID, uid, "member", "", fmt.Sprintf("%s 退出了团队", teamUserName(ctx, db, uid)))
	if a.store.Meta("current_team_id") == fmt.Sprint(teamID) {
		_ = a.store.SetMeta("current_team_id", "")
	}
	a.refreshTeamAssignedCache(ctx, db, uid)
	return nil
}

// ---------- 成员管理 ----------

func (a *App) TeamMembers(teamID int64) ([]TeamMember, error) {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return nil, e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "member"); e != nil {
		return nil, e
	}
	return teamMemberRows(ctx, db, teamID)
}

func teamMemberRows(ctx context.Context, db *sql.DB, teamID int64) ([]TeamMember, error) {
	rows, e := db.QueryContext(ctx, `SELECT m.user_id,u.username,COALESCE(p.nickname,''),COALESCE(p.title,''),COALESCE(p.bio,''),
		COALESCE(p.tech_tags,'[]'),COALESCE(p.avatar_thumb,''),m.role,m.joined_at
		FROM team_members m JOIN users u ON u.id=m.user_id LEFT JOIN user_profiles p ON p.user_id=m.user_id
		WHERE m.team_id=? ORDER BY FIELD(m.role,'owner','admin','member'), m.joined_at`, teamID)
	if e != nil {
		return nil, mapTeamErr(e)
	}
	defer rows.Close()
	out := []TeamMember{}
	for rows.Next() {
		var m TeamMember
		var tags string
		if e = rows.Scan(&m.UserID, &m.Username, &m.Nickname, &m.Title, &m.Bio, &tags, &m.Avatar, &m.Role, &m.JoinedAt); e != nil {
			return nil, e
		}
		m.TechTags = parseTechTags(tags)
		out = append(out, m)
	}
	return out, rows.Err()
}

func (a *App) TeamInvite(teamID int64, username, role string) error {
	if role != "member" && role != "admin" {
		role = "member"
	}
	username = strings.TrimSpace(username)
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	var target int64
	if e = db.QueryRowContext(ctx, `SELECT id FROM users WHERE username=?`, username).Scan(&target); e != nil {
		if e == sql.ErrNoRows {
			return errors.New("TEAM_USER_NOT_FOUND")
		}
		return mapTeamErr(e)
	}
	res, e := db.ExecContext(ctx, `INSERT IGNORE INTO team_members(team_id,user_id,role,joined_at) VALUES(?,?,?,?)`, teamID, target, role, nowRFC())
	if e != nil {
		return mapTeamErr(e)
	}
	if n, _ := res.RowsAffected(); n == 0 {
		return errors.New("TEAM_ALREADY_MEMBER")
	}
	var name string
	_ = db.QueryRowContext(ctx, `SELECT name FROM teams WHERE id=?`, teamID).Scan(&name)
	teamNotice(ctx, db, teamID, target, uid, "member", "", fmt.Sprintf("%s 把你加入了团队「%s」", teamUserName(ctx, db, uid), name))
	return nil
}

func (a *App) TeamSetRole(teamID, userID int64, role string) error {
	if role != "member" && role != "admin" {
		return errors.New("TEAM_ROLE_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "owner"); e != nil {
		return e
	}
	target, e := teamRole(ctx, db, teamID, userID)
	if e != nil {
		return e
	}
	if target == "" || target == "owner" {
		return errors.New("TEAM_ROLE_INVALID")
	}
	if _, e = db.ExecContext(ctx, `UPDATE team_members SET role=? WHERE team_id=? AND user_id=?`, role, teamID, userID); e != nil {
		return mapTeamErr(e)
	}
	label := "成员"
	if role == "admin" {
		label = "管理员"
	}
	teamNotice(ctx, db, teamID, userID, uid, "role", "", fmt.Sprintf("你的团队角色已调整为「%s」", label))
	return nil
}

func (a *App) TeamRemoveMember(teamID, userID int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	actor, e := requireTeamRole(ctx, db, teamID, uid, "admin")
	if e != nil {
		return e
	}
	target, e := teamRole(ctx, db, teamID, userID)
	if e != nil {
		return e
	}
	// owner 不可被移除；admin 只能移除普通成员；不能移除自己（请用退出）。
	if target == "" || target == "owner" || userID == uid || (actor == "admin" && target != "member") {
		return errors.New("TEAM_FORBIDDEN")
	}
	if _, e = db.ExecContext(ctx, `DELETE FROM team_members WHERE team_id=? AND user_id=?`, teamID, userID); e != nil {
		return mapTeamErr(e)
	}
	var name string
	_ = db.QueryRowContext(ctx, `SELECT name FROM teams WHERE id=?`, teamID).Scan(&name)
	teamNotice(ctx, db, teamID, userID, uid, "member", "", fmt.Sprintf("你已被移出团队「%s」", name))
	return nil
}

// ---------- 团队任务 ----------

func validTeamTask(t *TeamTask) error {
	t.Title = strings.TrimSpace(t.Title)
	if t.Title == "" {
		return errors.New("TEAM_TASK_TITLE_REQUIRED")
	}
	if t.Kind != "ticket" {
		t.Kind = "todo"
	}
	switch t.Priority {
	case "low", "medium", "high":
	default:
		t.Priority = "medium"
	}
	return nil
}

// TeamTaskSave 创建/编辑团队任务（admin+）。指派变化会通知新负责人。
func (a *App) TeamTaskSave(t TeamTask) (TeamTask, error) {
	if e := validTeamTask(&t); e != nil {
		return TeamTask{}, e
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return TeamTask{}, e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, t.TeamID, uid, "admin"); e != nil {
		return TeamTask{}, e
	}
	if t.AssigneeID > 0 {
		if r, e := teamRole(ctx, db, t.TeamID, t.AssigneeID); e != nil || r == "" {
			return TeamTask{}, errors.New("TEAM_ASSIGNEE_INVALID")
		}
	}
	now := nowRFC()
	if t.ID == 0 {
		history := fmt.Sprintf(`[{"status":"open","at":%q}]`, now)
		res, e := db.ExecContext(ctx, `INSERT INTO team_tasks(team_id,kind,title,description,priority,status,creator_id,assignee_id,start_at,due_at,urged_at,history,updated_at,deleted)
			VALUES(?,?,?,?,?,'open',?,?,?,?,'',?,?,0)`,
			t.TeamID, t.Kind, t.Title, t.Description, t.Priority, uid, t.AssigneeID, t.StartAt, t.DueAt, history, now)
		if e != nil {
			return TeamTask{}, mapTeamErr(e)
		}
		t.ID, _ = res.LastInsertId()
		t.Status, t.CreatorID, t.History, t.UpdatedAt = "open", uid, history, now
		if t.AssigneeID > 0 {
			teamNotice(ctx, db, t.TeamID, t.AssigneeID, uid, "assign", fmt.Sprint(t.ID),
				fmt.Sprintf("%s 给你指派了%s：%s", teamUserName(ctx, db, uid), teamTaskKindLabel(t.Kind), t.Title))
		}
		a.refreshTeamAssignedCache(ctx, db, uid)
		return t, nil
	}
	var prevAssignee int64
	if e = db.QueryRowContext(ctx, `SELECT assignee_id FROM team_tasks WHERE id=? AND team_id=? AND deleted=0`, t.ID, t.TeamID).Scan(&prevAssignee); e != nil {
		if e == sql.ErrNoRows {
			return TeamTask{}, errors.New("TEAM_TASK_NOT_FOUND")
		}
		return TeamTask{}, mapTeamErr(e)
	}
	if _, e = db.ExecContext(ctx, `UPDATE team_tasks SET kind=?,title=?,description=?,priority=?,assignee_id=?,start_at=?,due_at=?,updated_at=? WHERE id=? AND team_id=?`,
		t.Kind, t.Title, t.Description, t.Priority, t.AssigneeID, t.StartAt, t.DueAt, now, t.ID, t.TeamID); e != nil {
		return TeamTask{}, mapTeamErr(e)
	}
	if t.AssigneeID > 0 && t.AssigneeID != prevAssignee {
		teamNotice(ctx, db, t.TeamID, t.AssigneeID, uid, "assign", fmt.Sprint(t.ID),
			fmt.Sprintf("%s 给你指派了%s：%s", teamUserName(ctx, db, uid), teamTaskKindLabel(t.Kind), t.Title))
	}
	t.UpdatedAt = now
	a.refreshTeamAssignedCache(ctx, db, uid)
	return t, nil
}

func teamTaskKindLabel(kind string) string {
	if kind == "ticket" {
		return "工单"
	}
	return "任务"
}

// TeamTaskSetStatus 流转状态：负责人本人或 admin+。
func (a *App) TeamTaskSetStatus(teamID, id int64, status string) error {
	switch status {
	case "open", "doing", "done", "closed":
	default:
		return errors.New("TEAM_STATUS_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	role, e := requireTeamRole(ctx, db, teamID, uid, "member")
	if e != nil {
		return e
	}
	var assignee, creator int64
	var title, history, kind string
	if e = db.QueryRowContext(ctx, `SELECT assignee_id,creator_id,title,history,kind FROM team_tasks WHERE id=? AND team_id=? AND deleted=0`, id, teamID).
		Scan(&assignee, &creator, &title, &history, &kind); e != nil {
		if e == sql.ErrNoRows {
			return errors.New("TEAM_TASK_NOT_FOUND")
		}
		return mapTeamErr(e)
	}
	if teamRoleRank(role) < teamRoleRank("admin") && uid != assignee {
		return errors.New("TEAM_FORBIDDEN")
	}
	now := nowRFC()
	history = appendHistoryNode(history, status, now)
	if _, e = db.ExecContext(ctx, `UPDATE team_tasks SET status=?,history=?,updated_at=? WHERE id=?`, status, history, now, id); e != nil {
		return mapTeamErr(e)
	}
	// 负责人完成时告知创建人。
	if (status == "done" || status == "closed") && uid != creator {
		teamNotice(ctx, db, teamID, creator, uid, "status", fmt.Sprint(id),
			fmt.Sprintf("%s 将%s「%s」标记为%s", teamUserName(ctx, db, uid), teamTaskKindLabel(kind), title, teamStatusLabel(status)))
	}
	a.refreshTeamAssignedCache(ctx, db, uid)
	return nil
}

func teamStatusLabel(s string) string {
	switch s {
	case "doing":
		return "进行中"
	case "done":
		return "已完成"
	case "closed":
		return "已关闭"
	}
	return "待处理"
}

// appendHistoryNode 追加一个生命周期节点（沿用个人待办的 JSON 轨迹格式）。
func appendHistoryNode(history, status, at string) string {
	node := fmt.Sprintf(`{"status":%q,"at":%q}`, status, at)
	h := strings.TrimSpace(history)
	if h == "" || h == "[]" {
		return "[" + node + "]"
	}
	if strings.HasSuffix(h, "]") {
		return h[:len(h)-1] + "," + node + "]"
	}
	return "[" + node + "]"
}

// TeamTaskUrge 催办（admin+）：更新 urged_at 并通知负责人。
func (a *App) TeamTaskUrge(teamID, id int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	var assignee int64
	var title, kind string
	if e = db.QueryRowContext(ctx, `SELECT assignee_id,title,kind FROM team_tasks WHERE id=? AND team_id=? AND deleted=0`, id, teamID).Scan(&assignee, &title, &kind); e != nil {
		if e == sql.ErrNoRows {
			return errors.New("TEAM_TASK_NOT_FOUND")
		}
		return mapTeamErr(e)
	}
	if assignee <= 0 {
		return errors.New("TEAM_NO_ASSIGNEE")
	}
	now := nowRFC()
	if _, e = db.ExecContext(ctx, `UPDATE team_tasks SET urged_at=?,updated_at=? WHERE id=?`, now, now, id); e != nil {
		return mapTeamErr(e)
	}
	teamNotice(ctx, db, teamID, assignee, uid, "urge", fmt.Sprint(id),
		fmt.Sprintf("%s 催办了%s：%s", teamUserName(ctx, db, uid), teamTaskKindLabel(kind), title))
	return nil
}

func (a *App) TeamTaskDelete(teamID, id int64) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	if _, e = db.ExecContext(ctx, `UPDATE team_tasks SET deleted=1,updated_at=? WHERE id=? AND team_id=?`, nowRFC(), id, teamID); e != nil {
		return mapTeamErr(e)
	}
	a.refreshTeamAssignedCache(ctx, db, uid)
	return nil
}

// TeamTaskList 列出团队任务；filter: all | mine | created | open。
func (a *App) TeamTaskList(teamID int64, filter string) ([]TeamTask, error) {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return nil, e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "member"); e != nil {
		return nil, e
	}
	q := `SELECT t.id,t.team_id,t.kind,t.title,t.description,t.priority,t.status,t.creator_id,t.assignee_id,
		t.start_at,t.due_at,t.urged_at,t.history,t.updated_at,
		COALESCE((SELECT ` + teamDisplayExpr + ` FROM users u LEFT JOIN user_profiles p ON p.user_id=u.id WHERE u.id=t.creator_id),''),
		COALESCE((SELECT ` + teamDisplayExpr + ` FROM users u LEFT JOIN user_profiles p ON p.user_id=u.id WHERE u.id=t.assignee_id),'')
		FROM team_tasks t WHERE t.team_id=? AND t.deleted=0`
	args := []any{teamID}
	switch filter {
	case "mine":
		q += ` AND t.assignee_id=?`
		args = append(args, uid)
	case "created":
		q += ` AND t.creator_id=?`
		args = append(args, uid)
	case "open":
		q += ` AND t.status IN ('open','doing')`
	}
	q += ` ORDER BY t.updated_at DESC LIMIT 500`
	rows, e := db.QueryContext(ctx, q, args...)
	if e != nil {
		return nil, mapTeamErr(e)
	}
	defer rows.Close()
	out := []TeamTask{}
	for rows.Next() {
		var t TeamTask
		if e = rows.Scan(&t.ID, &t.TeamID, &t.Kind, &t.Title, &t.Description, &t.Priority, &t.Status, &t.CreatorID, &t.AssigneeID,
			&t.StartAt, &t.DueAt, &t.UrgedAt, &t.History, &t.UpdatedAt, &t.Creator, &t.Assignee); e != nil {
			return nil, e
		}
		out = append(out, t)
	}
	return out, rows.Err()
}

// ---------- 个人条目共享 ----------

// SetTodoTeam / SetTicketTeam 把个人条目共享到团队（teamID=0 取消共享）。
// 只改本地并置脏，走常规行同步上云；管理员经 TeamSharedItems 跨用户读取。
func (a *App) SetTodoTeam(id, teamID int64) error {
	return a.setItemTeam("todos", id, teamID)
}

func (a *App) SetTicketTeam(id, teamID int64) error {
	return a.setItemTeam("tickets", id, teamID)
}

func (a *App) setItemTeam(table string, id, teamID int64) error {
	if e := a.ready(); e != nil {
		return e
	}
	if teamID < 0 {
		teamID = 0
	}
	res, e := a.store.db.Exec(`UPDATE `+table+` SET team_id=?,dirty=1,updated_at=? WHERE id=? AND deleted=0`, teamID, nowRFC(), id)
	if e != nil {
		return e
	}
	if n, _ := res.RowsAffected(); n == 0 {
		return errors.New("NOT_FOUND")
	}
	if a.syncUserID() > 0 {
		go a.syncOnce(true)
	}
	return nil
}

// TeamSharedItems 团队成员共享的个人待办/工单（跨用户读 sync 表）。
func (a *App) TeamSharedItems(teamID int64) ([]TeamSharedItem, error) {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return nil, e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "member"); e != nil {
		return nil, e
	}
	q := `SELECT 'todo',s.uuid,s.user_id,` + teamDisplayExpr + `,s.title,s.status,s.priority,s.due_at,s.updated_at
		FROM sync_todos s JOIN users u ON u.id=s.user_id LEFT JOIN user_profiles p ON p.user_id=s.user_id
		WHERE s.team_id=? AND s.deleted=0
		UNION ALL
		SELECT 'ticket',s.uuid,s.user_id,` + teamDisplayExpr + `,s.title,s.status,s.priority,s.due_at,s.updated_at
		FROM sync_tickets s JOIN users u ON u.id=s.user_id LEFT JOIN user_profiles p ON p.user_id=s.user_id
		WHERE s.team_id=? AND s.deleted=0
		ORDER BY 9 DESC LIMIT 500`
	rows, e := db.QueryContext(ctx, q, teamID, teamID)
	if e != nil {
		return nil, mapTeamErr(e)
	}
	defer rows.Close()
	out := []TeamSharedItem{}
	for rows.Next() {
		var it TeamSharedItem
		if e = rows.Scan(&it.Kind, &it.UUID, &it.UserID, &it.Owner, &it.Title, &it.Status, &it.Priority, &it.DueAt, &it.UpdatedAt); e != nil {
			return nil, e
		}
		out = append(out, it)
	}
	return out, rows.Err()
}

// TeamUrgeShared 催办成员共享的个人条目（admin+）。
func (a *App) TeamUrgeShared(teamID int64, kind, uuid string) error {
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	table := "sync_todos"
	if kind == "ticket" {
		table = "sync_tickets"
	}
	var owner int64
	var title string
	if e = db.QueryRowContext(ctx, `SELECT user_id,title FROM `+table+` WHERE uuid=? AND team_id=? AND deleted=0`, uuid, teamID).Scan(&owner, &title); e != nil {
		if e == sql.ErrNoRows {
			return errors.New("TEAM_TASK_NOT_FOUND")
		}
		return mapTeamErr(e)
	}
	teamNotice(ctx, db, teamID, owner, uid, "urge", uuid,
		fmt.Sprintf("%s 催办了你共享的%s：%s", teamUserName(ctx, db, uid), teamTaskKindLabel(kind), title))
	return nil
}

// ---------- 日报 ----------

func (a *App) TeamReportSubmit(teamID int64, date, content string) error {
	if !teamDateRe.MatchString(date) {
		return errors.New("TEAM_DATE_INVALID")
	}
	content = strings.TrimSpace(content)
	if content == "" {
		return errors.New("TEAM_REPORT_EMPTY")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "member"); e != nil {
		return e
	}
	_, e = db.ExecContext(ctx, `INSERT INTO team_reports(team_id,user_id,date,content,submitted_at) VALUES(?,?,?,?,?)
		ON DUPLICATE KEY UPDATE content=VALUES(content),submitted_at=VALUES(submitted_at)`,
		teamID, uid, date, content, nowRFC())
	return mapTeamErr(e)
}

// TeamReportBoardGet 某日日报全景。普通成员只能看到自己的内容全文，
// 其他人仅显示已交/未交状态；管理员可见全部内容。
func (a *App) TeamReportBoardGet(teamID int64, date string) (TeamReportBoard, error) {
	if !teamDateRe.MatchString(date) {
		return TeamReportBoard{}, errors.New("TEAM_DATE_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return TeamReportBoard{}, e
	}
	defer cancel()
	defer db.Close()
	role, e := requireTeamRole(ctx, db, teamID, uid, "member")
	if e != nil {
		return TeamReportBoard{}, e
	}
	board := TeamReportBoard{Date: date, Role: role, Reports: []TeamReport{}, Missing: []TeamMember{}}
	rows, e := db.QueryContext(ctx, `SELECT r.user_id,`+teamDisplayExpr+`,r.content,r.submitted_at
		FROM team_reports r JOIN users u ON u.id=r.user_id LEFT JOIN user_profiles p ON p.user_id=r.user_id
		WHERE r.team_id=? AND r.date=? ORDER BY r.submitted_at`, teamID, date)
	if e != nil {
		return board, mapTeamErr(e)
	}
	submitted := map[int64]bool{}
	for rows.Next() {
		var r TeamReport
		if e = rows.Scan(&r.UserID, &r.User, &r.Content, &r.SubmittedAt); e != nil {
			rows.Close()
			return board, e
		}
		r.Date = date
		if teamRoleRank(role) < teamRoleRank("admin") && r.UserID != uid {
			r.Content = "" // 普通成员不可见他人日报正文
		}
		submitted[r.UserID] = true
		board.Reports = append(board.Reports, r)
	}
	rows.Close()
	if e = rows.Err(); e != nil {
		return board, e
	}
	members, e := teamMemberRows(ctx, db, teamID)
	if e != nil {
		return board, e
	}
	for _, m := range members {
		if !submitted[m.UserID] {
			board.Missing = append(board.Missing, m)
		}
	}
	var d TeamDigest
	e = db.QueryRowContext(ctx, `SELECT date,content,provider,generated_at FROM team_digests WHERE team_id=? AND date=?`, teamID, date).
		Scan(&d.Date, &d.Content, &d.Provider, &d.GeneratedAt)
	if e == nil {
		d.Content = stripFence(d.Content)
		board.Digest = &d
	} else if e != sql.ErrNoRows {
		return board, mapTeamErr(e)
	}
	return board, nil
}

// TeamReportUrge 催交日报（admin+）。
func (a *App) TeamReportUrge(teamID, userID int64, date string) error {
	if !teamDateRe.MatchString(date) {
		return errors.New("TEAM_DATE_INVALID")
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	defer cancel()
	defer db.Close()
	if _, e = requireTeamRole(ctx, db, teamID, uid, "admin"); e != nil {
		return e
	}
	if r, e := teamRole(ctx, db, teamID, userID); e != nil || r == "" {
		return errors.New("TEAM_USER_NOT_FOUND")
	}
	teamNotice(ctx, db, teamID, userID, uid, "report_urge", date,
		fmt.Sprintf("%s 提醒你提交 %s 的团队日报", teamUserName(ctx, db, uid), date))
	return nil
}

// ---------- 日报 AI 摘要 ----------

// teamDigestEvent 是 "team:digest" 事件载荷。
type teamDigestEvent struct {
	TeamID int64  `json:"teamId"`
	Date   string `json:"date"`
	Error  string `json:"error,omitempty"`
}

// TeamDigestGenerate 生成某日团队日报 AI 摘要（admin+，异步）。
func (a *App) TeamDigestGenerate(teamID int64, date string) error {
	if !teamDateRe.MatchString(date) {
		return errors.New("TEAM_DATE_INVALID")
	}
	if _, e := a.aiProvider(); e != nil {
		return e
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return e
	}
	role, err := requireTeamRole(ctx, db, teamID, uid, "admin")
	cancel()
	db.Close()
	_ = role
	if err != nil {
		return err
	}
	go a.generateTeamDigest(teamID, date)
	return nil
}

func (a *App) generateTeamDigest(teamID int64, date string) {
	emitErr := func(msg string) {
		a.emit("team:digest", teamDigestEvent{TeamID: teamID, Date: date, Error: msg})
	}
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
	defer cancel()
	db, e := a.openRemote(ctx)
	if e != nil {
		emitErr(e.Error())
		return
	}
	defer db.Close()
	rows, e := db.QueryContext(ctx, `SELECT `+teamDisplayExpr+`,r.content FROM team_reports r
		JOIN users u ON u.id=r.user_id LEFT JOIN user_profiles p ON p.user_id=r.user_id
		WHERE r.team_id=? AND r.date=? ORDER BY r.submitted_at`, teamID, date)
	if e != nil {
		emitErr(mapTeamErr(e).Error())
		return
	}
	var sb strings.Builder
	n := 0
	for rows.Next() {
		var user, content string
		if rows.Scan(&user, &content) == nil {
			fmt.Fprintf(&sb, "### %s\n%s\n\n", user, content)
			n++
		}
	}
	rows.Close()
	if n == 0 {
		emitErr("TEAM_NO_REPORTS")
		return
	}
	provider, e := a.aiProvider()
	if e != nil {
		emitErr(e.Error())
		return
	}
	var teamName string
	_ = db.QueryRowContext(ctx, `SELECT name FROM teams WHERE id=?`, teamID).Scan(&teamName)
	prompt := fmt.Sprintf("以下是团队「%s」%s 的 %d 份成员日报，请生成一份团队日报摘要（Markdown）：\n"+
		"1. 今日完成事项汇总（合并同类项）\n2. 进行中的工作\n3. 风险与阻塞（没有则省略）\n4. 每位成员一句话点评\n5. 明日建议\n\n%s",
		teamName, date, n, sb.String())
	stream, e := provider.ChatStream(ctx, []ai.Message{
		{Role: "system", Content: "你是资深研发团队负责人助理，输出简洁、结构化的中文 Markdown 团队日报摘要，不要编造日报里没有的内容。"},
		{Role: "user", Content: prompt},
	})
	if e != nil {
		emitErr(e.Error())
		return
	}
	var out strings.Builder
	for chunk := range stream {
		if chunk.Err != nil {
			emitErr(chunk.Err.Error())
			return
		}
		out.WriteString(chunk.Content)
	}
	content := dedentCommon(stripFence(strings.TrimSpace(out.String())))
	if content == "" {
		emitErr("AI_EMPTY_RESPONSE")
		return
	}
	if _, e = db.ExecContext(ctx, `INSERT INTO team_digests(team_id,date,content,provider,generated_at) VALUES(?,?,?,?,?)
		ON DUPLICATE KEY UPDATE content=VALUES(content),provider=VALUES(provider),generated_at=VALUES(generated_at)`,
		teamID, date, content, provider.Name(), nowRFC()); e != nil {
		emitErr(mapTeamErr(e).Error())
		return
	}
	a.store.Log("info", "团队", "团队日报摘要已生成", fmt.Sprintf("team=%d date=%s", teamID, date))
	a.emit("team:digest", teamDigestEvent{TeamID: teamID, Date: date})
}

// runTeamDigestLoop 管理员在线时每 5 分钟巡检：到点且当日摘要缺失则自动生成。
// 每团队每天只自动尝试一次（成功与否都记 meta），失败可手动重试。
func (a *App) runTeamDigestLoop() {
	ticker := time.NewTicker(5 * time.Minute)
	defer ticker.Stop()
	for range ticker.C {
		a.teamDigestTick(time.Now())
	}
}

func (a *App) teamDigestTick(now time.Time) {
	if a.store == nil || a.syncUserID() <= 0 || !a.syncOnline.Load() {
		return
	}
	ctx, cancel, db, uid, e := a.teamConn()
	if e != nil {
		return
	}
	defer cancel()
	defer db.Close()
	rows, e := db.QueryContext(ctx, `SELECT t.id,t.digest_time FROM teams t
		JOIN team_members m ON m.team_id=t.id AND m.user_id=? AND m.role IN ('owner','admin')`, uid)
	if e != nil {
		return
	}
	type cand struct {
		id int64
		at string
	}
	cands := []cand{}
	for rows.Next() {
		var c cand
		if rows.Scan(&c.id, &c.at) == nil {
			cands = append(cands, c)
		}
	}
	rows.Close()
	today := now.Format("2006-01-02")
	for _, c := range cands {
		if !service.DigestDue(c.at, now) {
			continue
		}
		markKey := fmt.Sprintf("team_digest_auto_%d", c.id)
		if a.store.Meta(markKey) == today {
			continue
		}
		var exists int
		_ = db.QueryRowContext(ctx, `SELECT COUNT(*) FROM team_digests WHERE team_id=? AND date=?`, c.id, today).Scan(&exists)
		if exists > 0 {
			_ = a.store.SetMeta(markKey, today)
			continue
		}
		var reports int
		_ = db.QueryRowContext(ctx, `SELECT COUNT(*) FROM team_reports WHERE team_id=? AND date=?`, c.id, today).Scan(&reports)
		if reports == 0 {
			continue // 还没人交日报，下轮再看
		}
		if _, e := a.aiProvider(); e != nil {
			continue
		}
		_ = a.store.SetMeta(markKey, today)
		go a.generateTeamDigest(c.id, today)
	}
}

// refreshTeamAssignedCache 缓存"指派给我的未完成团队任务数"（导航徽标用，离线读缓存）。
// 口径与「团队任务」页一致：只统计当前团队，且要求本人仍是成员——
// 避免退团残留指派或其他团队的任务让徽标亮起而页面列表为空（误报）。
func (a *App) refreshTeamAssignedCache(ctx context.Context, db *sql.DB, userID int64) {
	n := 0
	if teamID := a.currentTeamID(); teamID > 0 {
		if e := db.QueryRowContext(ctx, `SELECT COUNT(*) FROM team_tasks tt
			JOIN team_members tm ON tm.team_id=tt.team_id AND tm.user_id=?
			WHERE tt.team_id=? AND tt.assignee_id=? AND tt.deleted=0 AND tt.status IN ('open','doing')`,
			userID, teamID, userID).Scan(&n); e != nil {
			return
		}
	}
	_ = a.store.SetMeta("team_assigned_cache", fmt.Sprint(n))
}

// ---------- 通知拉取（挂在同步循环里） ----------

// pullTeamNotices 增量拉取发给本人的团队通知并转成本地消息。
// 表缺失（服务器未升级）时静默跳过，不影响主同步流程。
func (a *App) pullTeamNotices(ctx context.Context, db *sql.DB, userID int64) int {
	cursor := a.store.Meta("team_notice_cursor")
	if cursor == "" {
		cursor = "0"
	}
	rows, e := db.QueryContext(ctx, `SELECT id,team_id,kind,content FROM team_notices WHERE to_user=? AND id>? ORDER BY id LIMIT 200`, userID, cursor)
	if e != nil {
		return 0
	}
	defer rows.Close()
	titles := map[string]string{
		"assign": "团队任务指派", "urge": "团队催办", "report_urge": "日报催交",
		"member": "团队成员变动", "role": "团队角色变更", "status": "团队任务动态",
	}
	n := 0
	maxID := cursor
	for rows.Next() {
		var id, teamID int64
		var kind, content string
		if rows.Scan(&id, &teamID, &kind, &content) != nil {
			continue
		}
		title := titles[kind]
		if title == "" {
			title = "团队通知"
		}
		a.pushMessage("team", title, content, "team", teamID, true)
		maxID = fmt.Sprint(id)
		n++
	}
	if maxID != cursor {
		_ = a.store.SetMeta("team_notice_cursor", maxID)
	}
	return n
}