# use b as prefix
set-option -g prefix C-b
unbind-key C-a
bind-key C-b send-prefix

# enable focus events
set-option -g focus-events on

# keep stuff going
set-option -g exit-unattached off
set-option -g destroy-unattached off

# Start numbering at 1
set-option -g base-index 1

# Allows for faster key repetition
set-option -g escape-time 0

# Set a bigger scrollback buffer size
set-option -g history-limit 100000

# status
# set-option -g status-left '[#S]'
set-option -g status-right '#h %a %d-%b %H:%M'

# Rather than constraining window size to the maximum size of any client
# connected to the *session*, constrain window size to the maximum size of any
# client connected to *that window*. Much more reasonable.
set-window-option -g aggressive-resize on

# Activity monitoring
set-window-option -g monitor-activity on
set-option -g visual-activity on

# Mouse
set-option -g mouse on
# for scroll shite, when you have time read https://medium.freecodecamp.org/tmux-in-practice-scrollback-buffer-47d5ffa71c93
# and other stuff in https://github.com/wincent/wincent/blob/main/aspects/dotfiles/files/.tmux.conf

# Stay in copy mode on drag end.
# (Would use `bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X
# stop-selection` but it is a bit glitchy.)
unbind-key -T copy-mode-vi MouseDragEnd1Pane

# Scroll 3 lines at a time instead of default 5; don't extend dragged selections.
bind-key -T copy-mode-vi WheelUpPane select-pane\; send-keys -t'{mouse}' -X clear-selection\; send-keys -t'{mouse}' -X -N 3 scroll-up
bind-key -T copy-mode-vi WheelDownPane select-pane\; send-keys -t'{mouse}' -X clear-selection\; send-keys -t'{mouse}' -X -N 3 scroll-down

# Make double and triple click work outside of copy mode (already works inside it with default bindings).
bind-key -T root DoubleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-word"
bind-key -T root TripleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-line"

# Don't exit copy mode on double or triple click.
bind-key -T copy-mode-vi DoubleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-word"
bind-key -T copy-mode-vi TripleClick1Pane if-shell -Ft'{mouse}' '#{alternate_on}' "send-keys -M" "copy-mode -t'{mouse}'; send-keys -t'{mouse}' -X select-line"
 
# Reload config
bind r source-file ~/.tmux.conf \; display-message "Config reloaded..."

# Enable broadcast input
bind ` setw synchronize-panes

# auto window rename
set-option -g status-interval 5
set-option -g allow-rename off
set-option -g automatic-rename on
set-option -g automatic-rename-format '#{b:pane_current_path}'

# Vi copypaste mode
set-window-option -g mode-keys vi

# https://github.com/tmux/tmux/issues/754#issuecomment-297452143
bind-key -T copy-mode-vi v send-keys -X begin-selection
# bind-key -T copy-mode-vi y send-keys -X copy-nd-selection
bind-key -T copy-mode-vi y send-keys -X copy-pipe "if [ \"$(uname)\" = \"Darwin\" ]; then reattach-to-user-namespace pbcopy; elif command -v xclip >/dev/null 2>&1; then xclip -selection clipboard; else cat > /tmp/tmux-paste.txt; fi"

# Capture pane into VIM
# https://www.reddit.com/r/vim/comments/12eg832/comment/jfcg6p3/
bind V send-keys C-c C-u 'tmux capture-pane -Jp -S- | vim -' Enter

# hjkl pane traversal
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

# color
# Prefer tmux-256color; fall back to screen-256color on hosts whose
# terminfo db lacks it (older RHEL/BSD/minimal containers).
set -g default-terminal "screen-256color" # safe default; upgraded below where supported
if-shell 'infocmp tmux-256color >/dev/null 2>&1' \
  'set -g default-terminal "tmux-256color"'
# set -g default-terminal "xterm-256color"
set-option -a terminal-features "$TERM:RGB"
set -ag terminal-overrides ",$TERM:Tc"

# Tell tmux the outer terminal understands DECSET 2026 (synchronised output), so
# it can wrap its own redraws in begin/end-of-frame markers. Alacritty has
# supported it since 0.13. Without this, a full-screen TUI repainting inside
# tmux tears. (tmux does not pass an *application's* 2026 through, so this is
# the only lever we have on flicker under tmux.)
set -ag terminal-features ",*:sync"

# Advertise OSC 8 hyperlink support so tmux re-emits (rather than strips)
# hyperlinks from TUIs inside it. tmux only advertises the feature to inner
# apps -- via #{client_termfeatures}, which pi probes at startup -- when the
# feature is listed here. Test: `tmux display-message -p
# '#{client_termfeatures}'` should list `hyperlinks`, then restart pi.
# Clicking: Ghostty/Alacritty open links on a modifier-chord click (e.g.
# Cmd/Ctrl depending on capture); a plain click is selection, by design.
set -ag terminal-features ",*:hyperlinks"



# change selection color
set -wg mode-style fg=white,bg="#aaaaaa"

# tmux 1.9 decided it was a good idea to ditch default-path...
# now every command to create a new pane/window must be rebound
bind-key c new-window -c "#{pane_current_path}"
bind-key % split-window -h -c "#{pane_current_path}"
bind-key '"' split-window -v -c "#{pane_current_path}"

# emacs key bindings in tmux command prompt (prefix + :) are better than
# # vi keys, even for vim users
set -g status-keys emacs

# https://github.com/NHDaly/tmux-better-mouse-mode
# set -g @plugin 'tmux-plugins/tpm'
# # set -g @plugin 'tmux-plugins/tmux-sensible'
# set -g @plugin 'nhdaly/tmux-better-mouse-mode'
# run '~/.tmux/plugins/tpm/tpm'
# set -g @emulate-scroll-for-no-mouse-alternate-buffer "off"
# set -g @scroll-down-exit-copy-mode "on"


###########################################33
### Colors
# Guide:
# for i in {0..255}; do  printf "\x1b[38;5;${i}mcolor%-5i\x1b[0m" $i ; if ! (( ($i + 1 ) % 8 )); then echo ; fi ; done

if-shell -b 'test -e ~/.local/share/tmux/color.conf' {
  source-file "~/.local/share/tmux/color.conf"
  # run-shell 'tmux source-file "~/.local/share/tmux/color.conf"'
}

# Disable this section below because it should only apply to macOS systems
# # Sessions on this box are local-first; an SSH/mosh attach shouldn't make new
# # panes look like remote sessions (e.g. pure prompt showing user@host).
# # Default update-environment minus SSH_CONNECTION, keeping SSH_AUTH_SOCK so
# # agent forwarding still refreshes on attach.
# set-option -g update-environment "DISPLAY KRB5CCNAME SSH_ASKPASS SSH_AGENT_PID SSH_AUTH_SOCK WINDOWID XAUTHORITY"
# # Scrub it from whatever environment the server was started with
# # (mosh-tmux.sh execs tmux straight from the SSH environment).
# set-environment -g -u SSH_CONNECTION

# Let OSC escape sequences through to the outer terminal; without this tmux
# swallows Claude Code's desktop notifications and progress updates.
set -g allow-passthrough on

# Modified keys -- Shift+Enter, Ctrl+Enter, Ctrl+J -- reach the apps that ask
# for them (pi, Neovim, Claude Code) instead of arriving as a plain Enter. All
# three lines are needed:
#
# - extended-keys on: a pane may request xterm modifyOtherKeys. Not `always`,
#   which forces it on every pane and hands zsh ESC[13;2u for Shift+Enter.
# - extended-keys-format csi-u: the format pi asks for, and the one it can
#   decode in the misfire below. tmux 3.5 and later; -q lets 3.4 skip it.
# - extkeys for Ghostty: tmux asks the outer terminal for modified keys only
#   when it knows the terminal can send them, and it does not recognise
#   Ghostty, whose terminfo does not say so either. Without this the two lines
#   above change nothing there: Shift+Enter still arrives as a bare CR.
#
# Panes that ask for nothing, shells included, still get plain bytes, pastes
# too. One known misfire: in a display-popup tmux re-encodes the newlines of a
# paste, so an app there that asked for modified keys sees ESC[106;5u in
# their place. Nothing here opens popups.
set -g extended-keys on
set -gq extended-keys-format csi-u
set -as terminal-features 'xterm-ghostty:extkeys'

# Caps Lock is F20 (hammerspoon). What reaches tmux for it is read as S-F10 and
# passed on as ESC[21;2~, which Neovim takes for F22 and types out as text. Wispr
# Flow reads the key before the terminal does, so nothing here needs it: drop it.
# This also drops a real Shift+F10.
bind-key -n S-F10 {}

# Machine-local overrides, where a machine has any: ~/.tmux.conf.local, a real
# file in no repo, like ~/.localprofile for the shell. Not under ~/.config/tmux,
# which is a link into this repo. Last, so it wins over everything above,
# colours included; -q skips it silently where there is none. source-file
# rather than `if-shell -b`, which would apply it in the background, after the
# rest of the config and in no fixed order.
source-file -q ~/.tmux.conf.local