// 手機與帳號 in the window: what the phone sees (published when something changes), carrying out
// what the phone asks, and the settings page (phone password, account at the relay, backups,
// 裝置連結).

use super::*;
use crate::remote::{self, Cmd, Settings};
use serde_json::json;
use std::hash::{Hash, Hasher};

#[derive(Default)]
pub struct RemoteUi {
    sig: u64,
    last_publish: Option<Instant>,
    /// The settings the server threads were last given.
    pushed: Option<Settings>,
    pw1: String,
    pw2: String,
    relay_url: String,
    user: String,
    pass: String,
    invite: String,
    create: bool,
    pub(super) note: Arc<Mutex<String>>,
    join_rx: Option<Receiver<Result<(Settings, remote::AccountFind), String>>>,
    restore_rx: Option<Receiver<Result<Vec<u8>, String>>>,
    busy: Arc<AtomicBool>,
    peers: Arc<Mutex<Vec<(String, String, bool)>>>,
    last_seen_mark: Option<Instant>,
    peers_at: Option<Instant>,
    /// 團隊: (user, role) shared with, loaded from the relay; the form to add one.
    members: Arc<Mutex<Option<Result<Vec<(String, String)>, String>>>>,
    new_member: String,
    new_admin: bool,
    started: bool,
}

/// Approvals as the phone shows them.
fn approval_json(bot: &Bot, a: &Approval) -> serde_json::Value {
    let what = remote::tool_label(&a.tool);
    let title = match a.kind {
        ApprovalKind::EnableTools => format!("允許 {} 使用電腦工具嗎？", bot.name),
        ApprovalKind::EnableThisComputer => format!("允許 {} 在你的電腦上執行任務嗎？", bot.name),
        ApprovalKind::Action => format!("{} 想要{what}", bot.name),
    };
    json!({"bot": bot.id, "title": title, "reason": a.reason, "tool": a.tool, "can_always": a.kind != ApprovalKind::Action || !a.grant.is_empty()})
}

impl App {
    pub(super) fn remote_start(&mut self, ctx: &egui::Context) {
        if self.demo || self.rm.started {
            return;
        }
        self.rm.started = true;
        self.ctx_handle = Some(ctx.clone());
        let c = ctx.clone();
        remote::hub().set_repaint(Arc::new(move || c.request_repaint()));
        self.remote_apply_settings();
        self.mirror_boot();
    }

    /// Hand changed settings to the server threads (and restart what depends on them).
    fn remote_apply_settings(&mut self) {
        let s = self.state.remote.clone();
        if self.rm.pushed.as_ref() == Some(&s) {
            return;
        }
        let old = self.rm.pushed.replace(s.clone());
        remote::hub().set_settings(&s);
        let lan_changed = old.as_ref().map(|o| o.lan) != Some(s.lan);
        if lan_changed {
            match remote::set_lan(s.lan) {
                Ok(_) => {}
                Err(e) => *self.rm.note.lock().unwrap() = e,
            }
        }
        let relay_changed = old.as_ref().map(|o| (o.relay_url.clone(), o.host_token.clone())) != Some((s.relay_url.clone(), s.host_token.clone()));
        if relay_changed {
            remote::relay_restart(&s);
        }
    }

    /// Every frame: run what the phone asked and refresh what it sees.
    pub(super) fn remote_tick(&mut self, ctx: &egui::Context) {
        if self.demo {
            return;
        }
        self.remote_apply_settings();
        for c in remote::hub().take_cmds() {
            // A screen of another brain has no bots of its own to run phone requests on.
            if self.mir.on && !matches!(c, Cmd::DeviceAdded(_) | Cmd::DeviceSeen(_)) {
                continue;
            }
            self.remote_cmd(ctx, c);
        }
        self.brain_serve();
        self.brain_watch();
        if let Some(rx) = &self.rm.join_rx {
            if let Ok(r) = rx.try_recv() {
                self.rm.join_rx = None;
                match r {
                    Ok((s, found)) => {
                        self.state.remote = s;
                        self.rm.pass.clear();
                        self.account_sync(found);
                        self.mark();
                    }
                    Err(e) => *self.rm.note.lock().unwrap() = e,
                }
            }
        }
        if let Some(rx) = &self.rm.restore_rx {
            if let Ok(r) = rx.try_recv() {
                self.rm.restore_rx = None;
                match r.and_then(|bytes| serde_json::from_slice::<State>(&bytes).map_err(|e| format!("備份內容讀不出來：{e}"))) {
                    Ok(mut st) => {
                        // Keep this computer's own phone and account settings.
                        st.remote = self.state.remote.clone();
                        let n = st.bots.len();
                        self.state = st;
                        self.state.save();
                        *self.rm.note.lock().unwrap() = format!("已從備份還原 {n} 個 Bot");
                    }
                    Err(e) => *self.rm.note.lock().unwrap() = e,
                }
            }
        }
        // 自動備份: once a day while signed in.
        let s = &self.state.remote;
        if !self.mir.on && s.auto_backup && !s.backup_key.is_empty() && !s.relay_url.is_empty() && chrono::Utc::now().timestamp() - s.last_backup > 86_400 && !self.rm.busy.load(Ordering::SeqCst) {
            self.remote_backup();
        }
        // 裝置連結: keep the list of this account's computers fresh (once a minute).
        if !self.state.remote.host_token.is_empty() && !self.rm.peers_at.map(|t| t.elapsed().as_secs() < 60).unwrap_or(false) {
            self.rm.peers_at = Some(Instant::now());
            let (peers, s) = (self.rm.peers.clone(), self.state.remote.clone());
            std::thread::spawn(move || {
                let v = remote::devices_online(&s);
                if !v.is_empty() {
                    *peers.lock().unwrap() = v;
                }
            });
        }
        if !self.mir.on && !self.rm.last_publish.map(|t| t.elapsed().as_millis() < 120).unwrap_or(false) {
            self.remote_publish();
        }
    }

    /// 加一台電腦: one line to run on the new computer (a Linux box, a server); it joins as hands for
    /// the brain, with no password and nothing to answer.
    fn pair_section(&mut self, ui: &mut egui::Ui) {
        let p = self.pal;
        ui.add_space(6.0);
        ui.separator();
        ui.horizontal(|ui| {
            ui.label(RichText::new(t("加一台電腦")).size(13.5).strong());
            help_mark(ui, "讓另一台電腦（例如沒有螢幕的 Linux）也當大腦的手腳：在那台的終端機貼上這一行就好：還沒裝 AnyBot 會先自動裝好，不用帳號密碼、不用回答問題。它會設成開機自動執行，只讓這個大腦使用。", p);
            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                if ui.add(secondary_button("產生配對碼")).clicked() {
                    let (s, slot) = (self.state.remote.clone(), self.mir.pair.clone());
                    let for_host = if self.mir.on { s.brain_id.clone() } else { s.host_id.clone() };
                    *slot.lock().unwrap() = (t("正在產生…"), false, None);
                    std::thread::spawn(move || {
                        *slot.lock().unwrap() = match crate::remote::pair_code(&s, &for_host) {
                            Ok(code) => (crate::remote::pair_line(&s.relay_url, &code), true, Some(Instant::now())),
                            Err(e) => (e, false, None),
                        };
                    });
                }
            });
        });
        let (line, ok, at) = self.mir.pair.lock().unwrap().clone();
        if line.is_empty() {
            return;
        }
        let left = at.map(|t| 600u64.saturating_sub(t.elapsed().as_secs())).unwrap_or(0);
        if ok && left == 0 {
            hint(ui, "配對碼過期了，再按一次「產生配對碼」。", p);
            return;
        }
        if !ok {
            let c = if line.ends_with('…') { p.text2 } else { p.danger };
            ui.label(RichText::new(line).size(12.5).color(c));
            return;
        }
        Frame::new().fill(p.hover).corner_radius(8).inner_margin(Margin::symmetric(10, 8)).show(ui, |ui| {
            ui.horizontal(|ui| {
                ui.add(egui::Label::new(RichText::new(&line).monospace().size(13.0)).selectable(true).wrap());
                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                    if ui.add(secondary_button("複製")).clicked() {
                        ui.ctx().copy_text(line.clone());
                        self.notice = Some(t("已複製，貼到那台電腦的終端機執行"));
                    }
                });
            });
        });
        ui.label(RichText::new(format!("{}（還有 {} 分 {:02} 秒，只能用一次）", t("在那台電腦的終端機貼上執行"), left / 60, left % 60)).size(12.0).color(p.text3));
        // Just made: bring it into view.
        if at.map(|t| t.elapsed().as_millis() < 800).unwrap_or(false) {
            ui.scroll_to_cursor(Some(Align::Max));
        }
        ui.ctx().request_repaint_after(std::time::Duration::from_secs(1));
    }

    fn remote_signature(&self) -> u64 {
        let mut h = std::collections::hash_map::DefaultHasher::new();
        self.state.remote.host_name.hash(&mut h);
        self.scr.cfg_hash.hash(&mut h);
        for b in &self.state.bots {
            (b.id, &b.name, &b.color, b.unread, b.messages.len()).hash(&mut h);
            if let Some(m) = b.messages.last() {
                (m.text.len(), m.thinking.len(), m.tool_calls.len(), m.error).hash(&mut h);
                for c in &m.tool_calls {
                    (c.status as u8).hash(&mut h);
                }
            }
            if let Some(l) = self.streams.get(&b.id) {
                (1u8, &l.status, l.paused).hash(&mut h);
            }
            self.approvals.get(&b.id).map(|a| a.call_id.clone()).hash(&mut h);
        }
        for pg in &self.state.pages {
            (pg.id, pg.revision, pg.updated, &pg.title).hash(&mut h);
        }
        h.finish()
    }

    fn remote_publish(&mut self) {
        let sig = self.remote_signature();
        if sig == self.rm.sig {
            return;
        }
        self.rm.sig = sig;
        self.rm.last_publish = Some(Instant::now());
        let names: HashMap<u64, String> = self.state.bots.iter().map(|b| (b.id, b.name.clone())).collect();
        let mut bots: Vec<&Bot> = self.state.bots.iter().collect();
        // Pinned first, then the most recently active.
        bots.sort_by_key(|b| (!b.pinned, -(b.last_turn.as_ref().map(|t| t.settled_at_ms).unwrap_or(0))));
        let mut view = remote::View { host: self.state.remote.host_name.clone(), ..Default::default() };
        for b in bots {
            let live = self.streams.get(&b.id);
            let last = b.messages.iter().rev().find(|m| !m.text.trim().is_empty() && m.role != Role::Tool).map(|m| first_line(&m.text, 60)).unwrap_or_default();
            let c = crate::avatar::color(&b.color);
            let hex = format!("#{:02x}{:02x}{:02x}", c.r(), c.g(), c.b());
            view.bots.push(json!({
                "id": b.id, "name": b.name, "description": b.description, "color": hex, "shape": b.shape,
                "busy": live.is_some(), "status": live.and_then(|l| l.status.clone()).unwrap_or_default(),
                "unread": b.unread, "last": last, "members": !b.members.is_empty(), "pinned": b.pinned,
            }));
            let start = b.messages.len().saturating_sub(remote::PHONE_TAIL);
            view.messages.insert(b.id, b.messages[start..].iter().filter_map(|m| remote::message_json(m, &names, &self.state.pages)).collect());
            if let Some(a) = self.approvals.get(&b.id) {
                view.approvals.push(approval_json(b, a));
            }
        }
        view.pages = self.state.pages.clone();
        remote::hub().publish(view);
    }

    fn remote_cmd(&mut self, ctx: &egui::Context, c: Cmd) {
        match c {
            Cmd::Send { bot, text, attachments } => {
                if self.state.bot(bot).is_none() {
                    return;
                }
                let atts: Vec<crate::attach::Attachment> = attachments
                    .iter()
                    .filter(|p| std::path::Path::new(p).starts_with(crate::model::State::path().parent().unwrap_or(std::path::Path::new("/"))))
                    .filter_map(|p| {
                        let meta = std::fs::metadata(p).ok()?;
                        let file = std::path::Path::new(p).file_name()?.to_string_lossy().to_string();
                        let name = file.split_once('-').map(|x| x.1.to_string()).unwrap_or(file);
                        Some(crate::attach::Attachment { image: crate::attach::is_image_name(&name), name, path: p.clone(), bytes: meta.len(), on_box: String::new() })
                    })
                    .collect();
                if let Some(l) = self.streams.get(&bot) {
                    let (extra, _) = crate::attach::for_model(&atts);
                    l.steer.lock().unwrap().push(format!("{text}{extra}"));
                    return;
                }
                if let Some(b) = self.state.bot_mut(bot) {
                    b.messages.push(Message { attachments: atts, ..Message::user(&text) });
                }
                self.start_reply(ctx, bot);
            }
            Cmd::Stop { bot } => self.stop(bot),
            Cmd::Regenerate { bot } => self.regenerate(ctx, bot),
            Cmd::Reply { bot } => {
                if !self.streams.contains_key(&bot) && self.state.bot(bot).and_then(|b| b.messages.last()).map(|m| m.role == Role::User).unwrap_or(false) {
                    self.start_reply(ctx, bot);
                }
            }
            Cmd::RestoreThread { bot, index } => {
                self.stop(bot);
                if let Some(b) = self.state.bot_mut(bot) {
                    if index < b.threads.len() {
                        let (_, msgs) = b.threads.remove(index);
                        if !b.messages.is_empty() {
                            let title = b.messages.iter().find(|m| m.role == Role::User).map(|m| first_line(&m.text, 24)).unwrap_or_else(|| "對話".into());
                            let cur = std::mem::take(&mut b.messages);
                            b.threads.insert(0, (title, cur));
                        }
                        b.messages = msgs;
                    }
                }
                self.mark();
            }
            Cmd::Answer { bot, answer } => {
                let grant = self.approvals.get(&bot).map(|a| a.grant.clone()).unwrap_or_default();
                let a = match answer.as_str() {
                    "once" => ApprovalAnswer::Once,
                    "always" => ApprovalAnswer::Always(grant),
                    _ => ApprovalAnswer::Reject,
                };
                self.answer(ctx, bot, a);
            }
            Cmd::Read { bot } => {
                if let Some(b) = self.state.bot_mut(bot) {
                    if b.unread {
                        b.unread = false;
                        self.mark();
                    }
                }
            }
            Cmd::NewThread { bot } => {
                self.stop(bot);
                if let Some(b) = self.state.bot_mut(bot) {
                    if !b.messages.is_empty() {
                        let title = b.messages.iter().find(|m| m.role == Role::User).map(|m| first_line(&m.text, 24)).unwrap_or_else(|| "對話".into());
                        let msgs = std::mem::take(&mut b.messages);
                        b.threads.insert(0, (title, msgs));
                        b.threads.truncate(50);
                    }
                }
                self.mark();
            }
            Cmd::DeviceAdded(d) => {
                self.state.remote.devices.push(d);
                self.mark();
            }
            Cmd::DeviceSeen(h) => {
                if let Some(gone) = h.strip_prefix('-') {
                    self.state.remote.devices.retain(|d| d.token_hash != gone);
                    self.mark();
                } else if !self.rm.last_seen_mark.map(|t| t.elapsed().as_secs() < 60).unwrap_or(false) {
                    self.rm.last_seen_mark = Some(Instant::now());
                    if let Some(d) = self.state.remote.devices.iter_mut().find(|d| d.token_hash == h) {
                        d.last_seen = chrono::Utc::now().timestamp();
                        self.mark();
                    }
                }
            }
        }
    }

    /// 登入後同步: the account's bots and this computer's become one set.
    ///  • Another AnyBot of the account is the brain → show it, and copy this computer's bots
    ///    there (once it answers; bots it already has are skipped).
    ///  • This one is the only one → take in the backup's bots it doesn't have, then back up
    ///    the whole set, so the account has this computer's bots too.
    fn account_sync(&mut self, found: remote::AccountFind) {
        if let Some((id, name)) = found.brain {
            *self.rm.note.lock().unwrap() = format!("已登入，改用「{name}」當大腦：那邊的 Bot 會同步過來，這台的也會搬過去");
            self.mir.want = Some((id, name));
            self.mir.move_after_join = true;
            // The brain's bots may use this computer (each action still asks).
            self.state.remote.device_link = true;
            return;
        }
        let got = found.backup.and_then(|b| serde_json::from_slice::<State>(&b).ok());
        let n = got.map(|st| self.state.take_in_bots(&st)).unwrap_or(0);
        *self.rm.note.lock().unwrap() = if n > 0 { format!("已登入，帳號裡的 {n} 個 Bot 已同步到這台") } else { "已登入，這台 AnyBot 已加入帳號".into() };
        if !self.state.bots.is_empty() && self.state.remote.auto_backup {
            self.remote_backup();
        }
    }

    fn remote_backup(&mut self) {
        if self.rm.busy.swap(true, Ordering::SeqCst) {
            return;
        }
        self.state.remote.last_backup = chrono::Utc::now().timestamp();
        self.mark();
        let s = self.state.remote.clone();
        let mut st = self.state.clone();
        // The backup is for the bots; this computer's own keys to the relay and phones stay here.
        st.remote = Default::default();
        let bytes = serde_json::to_vec(&st).unwrap_or_default();
        let (note, busy) = (self.rm.note.clone(), self.rm.busy.clone());
        std::thread::spawn(move || {
            *note.lock().unwrap() = match remote::backup_now(&s, &bytes) {
                Ok(n) => format!("已備份（{}，已加密）", crate::cloudbox::human(n as u64)),
                Err(e) => e,
            };
            busy.store(false, Ordering::SeqCst);
        });
    }

    pub(super) fn remote_page(&mut self, ui: &mut egui::Ui, _ctx: &egui::Context) {
        let p = self.pal;
        let mut changed = false;
        setting_card(ui, p, |ui| {
            setting_title(ui, "手機與帳號", "在手機上和 Bot 聊天、核准它要做的事、看著它的電腦。", p);
            hint(ui, "兩種連法：同一個網路（或 Tailscale）直接連這台電腦；或登入帳號，透過你的帳號伺服器從任何地方連，這台電腦不用開放任何連接埠。", p);
        });

        // ── 帳號（薄後端） ──
        setting_card(ui, p, |ui| {
            setting_title(ui, "AnyBot 帳號", "帳號伺服器保管帳號、裝置清單和加密備份，手機從外面連進來也靠它轉送。", p);
            let s = &self.state.remote;
            if !s.host_token.is_empty() {
                let status = remote::hub().relay_status();
                ui.horizontal(|ui| {
                    let ok = status == "已連線";
                    let (r, _) = ui.allocate_exact_size(vec2(10.0, 10.0), egui::Sense::hover());
                    ui.painter().circle_filled(r.center(), 4.0, if ok { Color32::from_rgb(0x14, 0xc3, 0x70) } else { p.text3 });
                    ui.label(RichText::new(format!("{} · {}", s.relay_user, s.relay_url)).size(FONT_BASE));
                    ui.label(RichText::new(if status.is_empty() { "—".to_string() } else { status }).size(12.0).color(p.text3));
                });
                hint(ui, format!("手機打開 {} 用同一個帳號登入就能用。可以「加入主畫面」當成 App。", s.relay_url), p);
                ui.add_space(4.0);
                ui.horizontal(|ui| {
                    ui.label(RichText::new(t("這台電腦在手機上叫")).size(13.0).color(p.text2));
                    if ui.add(egui::TextEdit::singleline(&mut self.state.remote.host_name).desired_width(180.0)).lost_focus() {
                        changed = true;
                    }
                });
                if ui.checkbox(&mut self.state.remote.auto_backup, t("每天自動備份到帳號（加密，金鑰由你的密碼產生，伺服器打不開）")).changed() {
                    changed = true;
                }
                ui.horizontal(|ui| {
                    let busy = self.rm.busy.load(Ordering::SeqCst);
                    if ui.add_enabled(!busy, secondary_button(if busy { "備份中…" } else { "立刻備份" })).clicked() {
                        self.remote_backup();
                    }
                    if self.state.remote.last_backup > 0 {
                        let t = chrono::DateTime::from_timestamp(self.state.remote.last_backup, 0).map(|d| d.with_timezone(&chrono::Local).format("%m/%d %H:%M").to_string()).unwrap_or_default();
                        ui.label(RichText::new(format!("上次備份 {t}")).size(12.0).color(p.text3));
                    }
                    ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                        if ui.add(egui::Button::new(RichText::new(t("登出帳號")).size(12.5).color(p.danger)).frame(false)).clicked() {
                            let keep_name = self.state.remote.host_name.clone();
                            let s = &mut self.state.remote;
                            s.host_id.clear();
                            s.host_token.clear();
                            s.backup_key.clear();
                            s.host_name = keep_name;
                            changed = true;
                        }
                    });
                });
            } else {
                let busy = self.rm.join_rx.is_some();
                form_row(ui, "帳號伺服器", p, |ui| {
                    ui.add(egui::TextEdit::singleline(&mut self.rm.relay_url).hint_text(t("https://anybot.你的網域")).desired_width(f32::INFINITY));
                });
                form_row(ui, "帳號", p, |ui| {
                    ui.add(egui::TextEdit::singleline(&mut self.rm.user).desired_width(f32::INFINITY));
                });
                form_row(ui, "密碼", p, |ui| {
                    ui.add(egui::TextEdit::singleline(&mut self.rm.pass).password(true).desired_width(f32::INFINITY));
                });
                ui.checkbox(&mut self.rm.create, t("建立新帳號"));
                if self.rm.create {
                    form_row(ui, "邀請碼", p, |ui| {
                        ui.add(egui::TextEdit::singleline(&mut self.rm.invite).hint_text(t("伺服器設定了才需要")).desired_width(f32::INFINITY));
                    });
                }
                ui.horizontal(|ui| {
                    let ready = !self.rm.relay_url.trim().is_empty() && !self.rm.user.trim().is_empty() && self.rm.pass.len() >= 8;
                    if ui.add_enabled(ready && !busy, primary_button(if busy { "連線中…" } else if self.rm.create { "建立並登入" } else { "登入" }, p)).clicked() {
                        let (tx, rx) = channel();
                        self.rm.join_rx = Some(rx);
                        let (url, user, pass, create, invite, base) = (self.rm.relay_url.clone(), self.rm.user.trim().to_string(), self.rm.pass.clone(), self.rm.create, self.rm.invite.clone(), self.state.remote.clone());
                        std::thread::spawn(move || {
                            // Signed in: look right away for the bots the account already has.
                            let r = remote::relay_join(&base, &url, &user, &pass, create, &invite).map(|s| {
                                let found = remote::find_account_bots(&s, &pass);
                                (s, found)
                            });
                            let _ = tx.send(r);
                        });
                    }
                    if ui.add_enabled(ready && self.rm.restore_rx.is_none(), secondary_button("從帳號備份還原")).on_hover_text(t("把這台電腦的 Bot 換成帳號裡最新的備份")).clicked() {
                        let (tx, rx) = channel();
                        self.rm.restore_rx = Some(rx);
                        let (url, user, pass) = (self.rm.relay_url.clone(), self.rm.user.trim().to_string(), self.rm.pass.clone());
                        std::thread::spawn(move || {
                            let _ = tx.send(remote::restore(&url, &user, &pass));
                        });
                    }
                });
                hint(ui, "密碼至少 8 個字。帳號伺服器在 relay/ 資料夾，可以放在任何一台小主機（說明見 relay/README.md）。", p);
            }
            let note = self.rm.note.lock().unwrap().clone();
            if !note.is_empty() {
                ui.label(RichText::new(note).size(12.5).color(p.text2));
            }
        });

        // ── 大腦 ──
        if !self.state.remote.host_token.is_empty() {
            setting_card(ui, p, |ui| {
                ui.horizontal(|ui| {
                    ui.label(RichText::new(t("大腦")).size(FONT_BASE).strong());
                    help_mark(ui, "帳號裡選一台 AnyBot 當大腦（通常是跟帳號伺服器放在一起、一直開著的那台）。所有 Bot、聊天、記憶和例行任務都放在大腦上，由它思考和排程。其他電腦打開 AnyBot 看到的都是同一份，同時也是大腦的手腳：大腦的 Bot 可以透過裝置連結操作它們。大腦連不到時，這裡還能看之前的對話，但不能傳訊息，連回來就恢復。", p);
                });
                let s = &self.state.remote;
                let status = self.mir.status.lock().unwrap().clone();
                if self.mir.on {
                    ui.horizontal(|ui| {
                        let (r, _) = ui.allocate_exact_size(vec2(10.0, 10.0), egui::Sense::hover());
                        ui.painter().circle_filled(r.center(), 4.0, if self.mir.online { Color32::from_rgb(0x14, 0xc3, 0x70) } else { p.text3 });
                        ui.label(RichText::new(status).size(13.0).color(p.text2));
                    });
                    ui.horizontal(|ui| {
                        let busy = self.mir.moving.load(Ordering::SeqCst);
                        if ui.add_enabled(self.mir.online && !busy, secondary_button("把這台的 Bot 搬過去")).on_hover_text(t("把這台電腦原本的 Bot（連同聊天）、模型金鑰、技能和連接器複製到大腦。這台的原始資料不會刪掉。")).clicked() {
                            self.mirror_move_local();
                        }
                        if ui.add(secondary_button("改回用這台自己的 Bot")).clicked() {
                            self.mir.leave = true;
                        }
                    });
                    let note = self.mir.move_note.lock().unwrap().clone();
                    if !note.is_empty() {
                        ui.label(RichText::new(note).size(12.5).color(p.text2));
                    }
                } else {
                    ui.label(RichText::new(t("這台就是大腦：Bot 在這台電腦上思考和工作。")).size(13.0).color(p.text2));
                    let me = s.host_id.clone();
                    let peers: Vec<(String, String, bool)> = self.rm.peers.lock().unwrap().iter().filter(|(id, _, _)| !id.is_empty() && *id != me && !remote::is_hands(id)).cloned().collect();
                    if peers.is_empty() {
                        hint(ui, "帳號裡還沒有別台可以當大腦的 AnyBot。", p);
                    }
                    for (id, name, online) in peers {
                        ui.horizontal(|ui| {
                            let (r, _) = ui.allocate_exact_size(vec2(10.0, 10.0), egui::Sense::hover());
                            ui.painter().circle_filled(r.center(), 4.0, if online { Color32::from_rgb(0x14, 0xc3, 0x70) } else { p.text3 });
                            ui.label(RichText::new(&name).size(13.5));
                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                                if ui.add_enabled(online, secondary_button("改用它當大腦")).clicked() {
                                    self.mir.want = Some((id.clone(), name.clone()));
                                    // The brain's bots may use this computer (each action still asks).
                                    self.state.remote.device_link = true;
                                    changed = true;
                                }
                            });
                        });
                    }
                }
                self.pair_section(ui);
            });
        }

        // ── 同一個網路 ──
        setting_card(ui, p, |ui| {
            setting_title(ui, "同一個網路直接連", "手機和這台電腦在同一個 Wi-Fi，或都裝了 Tailscale 時使用。", p);
            let has_pw = !self.state.remote.password.is_empty();
            if ui.add_enabled(has_pw, egui::Checkbox::new(&mut self.state.remote.lan, t("讓手機直接連這台電腦"))).changed() {
                changed = true;
            }
            if self.state.remote.lan {
                if let Some(port) = remote::lan_port() {
                    for a in remote::addresses(port) {
                        ui.horizontal(|ui| {
                            ui.label(RichText::new(&a).monospace().size(13.0));
                            if ui.small_button(t("複製")).clicked() {
                                ui.ctx().copy_text(a.clone());
                            }
                        });
                    }
                }
            }
            ui.add_space(4.0);
            form_row(ui, if has_pw { "更改手機密碼" } else { "設定手機密碼" }, p, |ui| {
                ui.add(egui::TextEdit::singleline(&mut self.rm.pw1).password(true).hint_text(t("至少 8 個字")).desired_width(f32::INFINITY));
            });
            form_row(ui, "再輸入一次", p, |ui| {
                ui.add(egui::TextEdit::singleline(&mut self.rm.pw2).password(true).desired_width(f32::INFINITY));
            });
            let ok = self.rm.pw1.chars().count() >= 8 && self.rm.pw1 == self.rm.pw2;
            if ui.add_enabled(ok, secondary_button("儲存密碼")).clicked() {
                self.state.remote.password = crate::httpd::hash_password(&self.rm.pw1);
                // A new password signs every phone out.
                self.state.remote.devices.clear();
                self.rm.pw1.clear();
                self.rm.pw2.clear();
                changed = true;
            }
            if !self.rm.pw2.is_empty() && self.rm.pw1 != self.rm.pw2 {
                hint(ui, "兩次輸入的密碼不一樣", p);
            }
            hint(ui, "不要把這個連接埠開放到網際網路上；從外面連請用上面的帳號，或 Tailscale。", p);
        });

        // ── 允許手機做什麼 ──
        setting_card(ui, p, |ui| {
            setting_title(ui, "手機可以做什麼", "聊天、核准、看 Bot 的電腦一律可以。下面這些會碰到這台電腦本身，預設關閉。", p);
            if ui.checkbox(&mut self.state.remote.mac_from_phone, t("從手機看這台電腦的螢幕並操作（點、打字、按鍵）")).changed() {
                changed = true;
            }
            if ui.checkbox(&mut self.state.remote.device_link, t("裝置連結：讓帳號裡其他的 AnyBot（例如放在伺服器上的）操作這台電腦")).changed() {
                changed = true;
            }
            hint(ui, "裝置連結開著時，伺服器上的 Bot 可以把「你的電腦」的螢幕、檔案、指令和 Mac App 工具交給這台電腦執行。每個動作仍照那邊的權限規則詢問你（手機上也能核准）。", p);
        });

        // ── 已登入的裝置 ──
        setting_card(ui, p, |ui| {
            setting_title(ui, "直接連線的裝置", "用手機密碼登入過的手機和瀏覽器", p);
            if self.state.remote.devices.is_empty() {
                hint(ui, "還沒有", p);
            }
            let mut remove = None;
            for (i, d) in self.state.remote.devices.iter().enumerate() {
                ui.horizontal(|ui| {
                    ui.label(RichText::new(&d.name).size(FONT_BASE));
                    let seen = chrono::DateTime::from_timestamp(d.last_seen.max(d.created), 0).map(|t| t.with_timezone(&chrono::Local).format("最近 %m/%d %H:%M").to_string()).unwrap_or_default();
                    ui.label(RichText::new(seen).size(12.0).color(p.text3));
                    ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                        if ui.add(egui::Button::new(RichText::new(t("登出")).size(12.0).color(p.danger)).frame(false)).clicked() {
                            remove = Some(i);
                        }
                    });
                });
            }
            if let Some(i) = remove {
                self.state.remote.devices.remove(i);
                changed = true;
            }
        });

        // ── 團隊 ──
        if !self.state.remote.host_token.is_empty() {
            setting_card(ui, p, |ui| {
                setting_title(ui, "分享給團隊", "讓帳號伺服器上的其他帳號也能用這台 AnyBot 的 Bot。", p);
                hint(ui, "成員：可以和 Bot 聊天、附加檔案；Bot 會知道是誰在說話。管理員：另外可以核准 Bot 要做的事、停止、看和操作電腦畫面。需要你允許的事只通知你和管理員。", p);
                let loaded = self.rm.members.lock().unwrap().clone();
                if loaded.is_none() {
                    *self.rm.members.lock().unwrap() = Some(Ok(vec![]));
                    let (m, s) = (self.rm.members.clone(), self.state.remote.clone());
                    std::thread::spawn(move || *m.lock().unwrap() = Some(remote::members(&s)));
                }
                let mut change: Option<(String, &str)> = None;
                match loaded {
                    Some(Ok(list)) => {
                        for (user, role) in list {
                            ui.horizontal(|ui| {
                                ui.label(RichText::new(&user).size(FONT_BASE));
                                ui.label(RichText::new(if role == "admin" { "管理員" } else { "成員" }).size(12.0).color(p.text3));
                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                                    if ui.add(egui::Button::new(RichText::new(t("移除")).size(12.0).color(p.danger)).frame(false)).clicked() {
                                        change = Some((user.clone(), "remove"));
                                    }
                                });
                            });
                        }
                    }
                    Some(Err(e)) => hint(ui, format!("讀不到分享清單：{e}"), p),
                    None => {}
                }
                ui.horizontal(|ui| {
                    ui.add(egui::TextEdit::singleline(&mut self.rm.new_member).hint_text(t("對方的帳號")).desired_width(160.0));
                    ui.checkbox(&mut self.rm.new_admin, t("管理員"));
                    if ui.add_enabled(!self.rm.new_member.trim().is_empty(), secondary_button("分享")).clicked() {
                        change = Some((self.rm.new_member.trim().to_string(), if self.rm.new_admin { "admin" } else { "member" }));
                        self.rm.new_member.clear();
                    }
                });
                // Talk to the relay off the window's thread, then show the new list.
                if let Some((user, role)) = change {
                    let (m, note, s, role) = (self.rm.members.clone(), self.rm.note.clone(), self.state.remote.clone(), role.to_string());
                    std::thread::spawn(move || {
                        let r = remote::set_member(&s, &user, &role);
                        *note.lock().unwrap() = match r {
                            Ok(()) if role == "remove" => format!("已停止分享給 {user}"),
                            Ok(()) => format!("已分享給 {user}"),
                            Err(e) => e,
                        };
                        *m.lock().unwrap() = Some(remote::members(&s));
                    });
                }
            });
        }

        // ── 帳號裡的其他電腦 ──
        if !self.state.remote.host_token.is_empty() {
            setting_card(ui, p, |ui| {
                setting_title(ui, "帳號裡的電腦", "登入同一個帳號的 AnyBot。開了裝置連結的電腦，Bot 可以操作它。", p);
                if ui.small_button(t("重新整理")).clicked() || (self.rm.peers.lock().unwrap().is_empty() && !self.rm.busy.load(Ordering::SeqCst)) {
                    let (peers, s) = (self.rm.peers.clone(), self.state.remote.clone());
                    let first = peers.lock().unwrap().is_empty();
                    if first {
                        peers.lock().unwrap().push((String::new(), "讀取中…".into(), false));
                    }
                    std::thread::spawn(move || {
                        let v = remote::devices_online(&s);
                        *peers.lock().unwrap() = if v.is_empty() { vec![(String::new(), "（沒有）".into(), false)] } else { v };
                    });
                }
                for (id, name, online) in self.rm.peers.lock().unwrap().iter() {
                    ui.horizontal(|ui| {
                        let (r, _) = ui.allocate_exact_size(vec2(10.0, 10.0), egui::Sense::hover());
                        if !id.is_empty() {
                            ui.painter().circle_filled(r.center(), 4.0, if *online { Color32::from_rgb(0x14, 0xc3, 0x70) } else { p.text3 });
                        }
                        let me = *id == self.state.remote.host_id;
                        ui.label(RichText::new(format!("{name}{}", if me { "（這台）" } else { "" })).size(13.5));
                    });
                }
            });
        }
        if changed {
            self.mark();
        }
    }

    /// Other AnyBots of this account that let bots operate them (裝置連結), as computers.
    pub(super) fn linked_devices(&self) -> Vec<tools::Target> {
        if self.state.remote.host_token.is_empty() {
            return vec![];
        }
        self.rm
            .peers
            .lock()
            .unwrap()
            .iter()
            .filter(|(id, _, online)| !id.is_empty() && *online && *id != self.state.remote.host_id)
            .map(|(id, name, _)| tools::Target { name: name.clone(), place: tools::Place::Device { host: id.clone() } })
            .collect()
    }
}