# Forward modified keys (Shift/Ctrl/Alt+Enter) to apps like pi-coding-agent.
# Without this, tmux collapses them to a plain Enter. Requires tmux 3.5+ for csi-u.
set -g extended-keys on
set -g extended-keys-format csi-u
# termux reports xterm-256color: without RGB every #rrggbb below is approximated to the 256
# palette on the phone, and without extkeys tmux never asks the terminal for Shift/Ctrl+Enter.
# (kitty is xterm-kitty, whose terminfo already carries both.)
set -as terminal-features 'xterm-256color:RGB:extkeys'
# Let apps wrap escape sequences in DCS tmux passthrough (Claude Code / pi notifications,
# Claude's progress bar) so they reach the outer terminal instead of being swallowed.
set -g allow-passthrough on

# Mouse/touch reporting. Chiefly so the window list in the status bar is
# tappable — tmux binds MouseDown1Status to `switch-client -t =` out of the box,
# and status-format[1] below keeps the `range=window|…` markers that make each
# entry a hit target, so a tap on a tab switches to it with no extra binding.
# Wheel over the bar cycles windows; right-click a tab or the session name for
# tmux's built-in menus; tmux-menus (plugin below) puts the same menus on prefix+\,
# which a phone can tap through.
#
# The cost: drag-select now goes to tmux instead of kitty, so hold Shift when you
# want kitty's own selection. Scroll wheel enters copy-mode on the pane rather
# than kitty's scrollback, and a click focuses the pane under it.
set -g mouse on

# Number windows (and panes) from 1 instead of 0 — easier to reach on the
# keyboard. renumber-windows keeps them gap-free when a window is closed.
set -g base-index 1
setw -g pane-base-index 1
set -g renumber-windows on

# One long agent turn scrolls past tmux's default 2000 lines; resurrect captures pane
# contents from this buffer too. Applies to panes created after the change.
set -g history-limit 50000

# Copy-mode: vi keys, v/y like an editor. set-clipboard on pushes every copy — tmux's own and
# those apps inside make (nvim, pi) — over OSC 52 to the CLIENT terminal, so a yank on the
# phone lands on the phone and on kitty lands on the desktop, wherever the server runs.
setw -g mode-keys vi
bind -T copy-mode-vi v send -X begin-selection
bind -T copy-mode-vi y send -X copy-selection-and-cancel
set -s set-clipboard on

# --- Session persistence (survives reboot) ---------------------------------
# resurrect: save/restore sessions, windows, panes, layout and working dirs
#            (prefix + Ctrl-s to save, prefix + Ctrl-r to restore).
# continuum: auto-saves every 15 min and auto-restores when the tmux server
#            starts, so sessions come back after a reboot. Both via tpm.
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-resurrect'
set -g @plugin 'tmux-plugins/tmux-continuum'
# menus: tmux's context menus on prefix+\ (tappable; no right-click needed on a phone).
set -g @plugin 'jaclu/tmux-menus'

# Also capture pane scrollback and restore running programs (nvim, …).
# nvim 'session' strategy restores via Session.vim when present, else plain nvim.
set -g @resurrect-capture-pane-contents 'on'
set -g @resurrect-strategy-nvim 'session'

# Auto-restore the last saved environment on tmux server start.
set -g @continuum-restore 'on'

# Auto-start a detached tmux server at login: continuum writes and enables a
# systemd --user unit (~/.config/systemd/user/tmux.service). With the restore
# option above, sessions are already back and waiting after a reboot+login.
set -g @continuum-boot 'on'

# --- Status bar (Catppuccin Mocha, flat) -----------------------------------
# Palette: bg #1e1e2e · surface #313244 · divider #45475a · muted #6c7086/#7f849c
#          text #cdd6f4 · subtext #a6adc8 · accent(mauve) #cba6f7
set -g status on
set -g status-position bottom          # (also tmux's default)
set -g status-interval 5               # refresh clock + CPU every 5s
set -g status-justify left
set -g status-style "bg=default,fg=#cdd6f4"     # transparent: no bar background
set -g status-left-length 40
set -g status-right-length 100

# --- Mobile view -----------------------------------------------------------
# status-left and status-right are re-evaluated per client on every draw, and
# #{client_width} is that client's own width — so in `auto` mode a phone attached
# to the same session as the desktop renders the compact bars while the desktop
# keeps the full ones, simultaneously and with no intervention.
#
# @status_mode is auto (per-client, by width) | full | compact, cycled with
# prefix+S. Rather than branch each bar three ways, the mode picks the width a
# client has to beat — 0 nothing can lose, 9999 nothing can win — so each
# decision below stays a single comparison. The 100 is the switch point: the full
# right segment is ~60 columns before the window list even starts. Set
# @status_mode without -g to scope an override to one session, so a grouped
# mobile session can sit on `compact` while the desktop session stays on `auto`.
#
# Each variant lives in its own option instead of inline because #{?a,b,c} splits
# its branches on commas and the styles are full of them (#[fg=…,bold]); option
# values are substituted after the ternary is parsed, so those commas are never
# seen as separators.
#
# NOTE: the comparisons MUST use #{e|>=:…}. Plain #{>=:…} compares as strings, so
# "144" >= "100" is false and every client would get the compact bar.
set -g @status_mode auto
set -g @status_cutoff "#{?#{==:#{@status_mode},full},0,#{?#{==:#{@status_mode},compact},9999,100}}"

# Left: session name (mauve/bold) + thin divider. Compact clips the name to two
# characters — enough to tell sessions apart when every column counts. #{=2:…}
# takes a format NAME, so it's session_name here rather than the #S shorthand.
set -g @left_full    " #[fg=#cba6f7,bold]#S #[fg=#45475a]│ "
set -g @left_compact " #[fg=#cba6f7,bold]#{=2:session_name} #[fg=#45475a]│ "
set -g status-left "#{?#{e|>=:#{client_width},#{E:@status_cutoff}},#{E:@left_full},#{E:@left_compact}}"

# Middle: flat window list — inactive muted, active mauve/bold, 2-space gaps.
set -g window-status-separator "  "
setw -g window-status-format         "#[fg=#7f849c]#I#{P:#{E:@agent_badge}} #[fg=#6c7086]#W#[default]"
setw -g window-status-current-format "#[fg=#cba6f7,bold]#I #[fg=#cdd6f4,bold]#W"
setw -g window-status-activity-style "fg=#f9e2af"
# The agent-state bell flags the window (monitor-bell) so the outer terminal buzzes; tmux's
# default bell style is `reverse`, which painted the window entry — only the glyph gets colour.
setw -g window-status-bell-style default

# Right: net dl/ul · cpu · mem · temp │ date │ clock. One #() job per refresh: metrics.sh
# prints the whole coloured segment (it was five separate scripts per tick). continuum
# prepends its invisible save hook to status-right (this block sits above the tpm `run`
# line, so the hook survives every reload). The hook lands ahead of the #{?} below, i.e.
# outside it, so it keeps running for every client regardless of which variant is drawn.
set -g @right_full "#(~/.config/tmux/scripts/metrics.sh full)#[fg=#45475a]│ #[fg=#a6adc8]%a %b %-d #[fg=#45475a]│ #[fg=#cba6f7,bold]%H:%M "

# Compact: cpu + mem only. Net rates and the temp glyph go first (widest, least
# useful on a phone), then the date, then the clock — a phone shows its own.
set -g @right_compact "#(~/.config/tmux/scripts/metrics.sh compact) "

set -g status-right "#{?#{e|>=:#{client_width},#{E:@status_cutoff}},#{E:@right_full},#{E:@right_compact}}"

# Cycle auto -> compact -> full -> auto. Braces instead of nested quoted strings
# so the styles' commas and the inner if-shell don't need escaping.
bind S {
  if -F '#{==:#{@status_mode},auto}' {
    set -g @status_mode compact
    display 'status bar: compact (forced)'
  } {
    if -F '#{==:#{@status_mode},compact}' {
      set -g @status_mode full
      display 'status bar: full (forced)'
    } {
      set -g @status_mode auto
      display 'status bar: auto — switches at 100 columns'
    }
  }
  refresh-client -S
}

# Two rows: [0] drawn top-border rule · [1] the bar content. The rule doubles as
# the separator from the pane content above; tmux status height is whole rows, so
# one row above the content is the smallest gap that still shows a border.
# The rule is a literal run of ─ in @rule (300 columns; tmux clips it to the client
# width), so drawing it costs no process.
# status-format[1] is tmux 3.7's default content template (status-left/windows/right).
set -g status 2
set -g @rule "────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────"
set -g status-format[0] "#[fg=#6c7086,bg=default]#{@rule}"
set -g status-format[1] "#[align=left range=left #{E:status-left-style}]#[push-default]#{T;=/#{status-left-length}:status-left}#[pop-default]#[norange default]#[list=on align=#{status-justify}]#[list=left-marker]<#[list=right-marker]>#[list=on]#{W:#[range=window|#{window_index} #{E:window-status-style}#{?#{&&:#{window_last_flag},#{!=:#{E:window-status-last-style},default}}, #{E:window-status-last-style},}#{?#{&&:#{window_bell_flag},#{!=:#{E:window-status-bell-style},default}}, #{E:window-status-bell-style},#{?#{&&:#{||:#{window_activity_flag},#{window_silence_flag}},#{!=:#{E:window-status-activity-style},default}}, #{E:window-status-activity-style},}}]#[push-default]#{T:window-status-format}#[pop-default]#[norange default]#{?loop_last_flag,,#{E:window-status-separator}},#[range=window|#{window_index} list=focus #{?#{!=:#{E:window-status-current-style},default},#{E:window-status-current-style},#{E:window-status-style}}#{?#{&&:#{window_last_flag},#{!=:#{E:window-status-last-style},default}}, #{E:window-status-last-style},}#{?#{&&:#{window_bell_flag},#{!=:#{E:window-status-bell-style},default}}, #{E:window-status-bell-style},#{?#{&&:#{||:#{window_activity_flag},#{window_silence_flag}},#{!=:#{E:window-status-activity-style},default}}, #{E:window-status-activity-style},}}]#[push-default]#{T:window-status-current-format}#[pop-default]#[norange list=on default]#{?loop_last_flag,,#{E:window-status-separator}}}#[range=user|newwin] #[fg=#6c7086]+#[default] #[norange]#[range=user|agentnext] #[fg=#6c7086]»#[default] #[norange]#[nolist align=right range=right #{E:status-right-style}]#[push-default]#{T;=/#{status-right-length}:status-right}#[pop-default]#[norange default]"

# The `+` appended to the window list above sits in a `range=user|newwin`
# marker. Per tmux(1), a user range triggers the same `Status` mouse key as a
# window range and exposes its argument in #{mouse_status_range} — window ranges
# report the literal string "window" — so one binding can serve both: click a
# tab to select it (tmux's stock behaviour, kept in the else branch), click the
# `+` to open a new window, click the `»` to jump to the next window with an agent
# mark (scripts/agent-next.sh, also prefix+Tab). Padded with spaces on both sides so
# each is a wide enough target to hit with a thumb.
bind -n MouseDown1Status {
  if -F '#{==:#{mouse_status_range},newwin}' {
    new-window
  } {
    if -F '#{==:#{mouse_status_range},agentnext}' {
      run-shell '~/.config/tmux/scripts/agent-next.sh'
    } {
      switch-client -t =
    }
  }
}

# Agent state per pane — set by ~/.config/tmux/scripts/agent-state.sh <tool> <state> from the
# Claude Code / codex / pi / opencode hooks: @agent = busy|done|input|error. @agent_badge draws
# one glyph glued to the window number ("2✓ name") in the window list, the same for every tool: ✓ done (green),
# ? waiting for input (yellow), ! error (red); busy draws nothing. Visiting the pane only takes
# the colour away (pane-focus-in sets @agent_seen; needs focus-events): the glyph stays, grey,
# until the next prompt turns the state busy. prefix K clears every mark; prefix Tab (or the »
# in the bar) jumps to the next window with a mark, coloured ones first. A coloured glyph
# always means "this happened while you were not looking".
set -g @agent_badge "#{?#{==:#{@agent},done},#{?#{@agent_seen},#[fg=#6c7086],#[fg=#a6e3a1]}✓,#{?#{==:#{@agent},input},#{?#{@agent_seen},#[fg=#6c7086],#[fg=#f9e2af]}?,#{?#{==:#{@agent},error},#{?#{@agent_seen},#[fg=#6c7086],#[fg=#f38ba8]}!,}}}"
set -g focus-events on
set-hook -g pane-focus-in 'set -p @agent_seen 1'
bind Tab run-shell '~/.config/tmux/scripts/agent-next.sh'
bind K run-shell 'for p in $(tmux list-panes -a -F "##{pane_id}"); do tmux set -p -t $p -u @agent; tmux set -p -t $p -u @agent_seen; done' \; display-message "agent marks cleared"

# Round out the theme so no default green leaks into borders/messages/modes.
set -g pane-border-style        "fg=#313244"
set -g pane-active-border-style "fg=#cba6f7"
set -g message-style            "bg=#313244,fg=#cdd6f4"
set -g message-command-style    "bg=#313244,fg=#cdd6f4"
set -g mode-style               "bg=#45475a,fg=#cdd6f4"
set -g clock-mode-colour        "#cba6f7"

# Initialize tpm — KEEP THIS LINE AT THE VERY BOTTOM of tmux.conf.
run '~/.config/tmux/plugins/tpm/tpm'