# Prefix: Ctrl-Space. Chosen over Ctrl-b (awkward reach) and Ctrl-a (collides
# with readline's beginning-of-line, which fights editing text in shells and
# in Claude Code's prompt). Verified clear of IME/KDE/Claude Code bindings.
unbind C-b
set -g prefix C-Space
bind C-Space send-prefix

set -g mouse on
# OSC52 lets copy-mode selections land in the system clipboard via the
# terminal itself (Alacritty supports it) -- no wl-copy/xclip needed, and it
# still works over SSH later since the escape sequence travels with the data.
set -g set-clipboard on

set -g mode-keys vi
set -g status-keys vi
bind -T copy-mode-vi v send -X begin-selection
bind -T copy-mode-vi y send -X copy-selection-and-cancel
bind -T copy-mode-vi MouseDragEnd1Pane send -X copy-selection-and-cancel

# tmux's -h/-v split flags name the *arrangement*, not the divider line, which
# is backwards from how the divider looks -- so pick keys by what they draw:
# \ draws a side-by-side split (vertical line), - draws a stacked split
# (horizontal line). Unshifted versions of |/-  since splitting is frequent.
unbind %
unbind '"'
bind \\ split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"
bind c new-window -c "#{pane_current_path}"

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

set -g base-index 1
setw -g pane-base-index 1
set -g renumber-windows on

bind r source-file ~/.config/tmux/tmux.conf \; display-message "tmux.conf reloaded"

# True color passthrough. ",*" (rather than naming Alacritty's xterm-256color
# specifically) so this keeps working if the terminal emulator changes later.
set -g default-terminal "tmux-256color"
set -ag terminal-overrides ",*:RGB"

# Default 500ms delay on Esc exists to disambiguate meta-key sequences; it
# reads as noticeable lag exiting insert mode in neovim, so drop it.
set -sg escape-time 10

set -g history-limit 10000

# Flag a background window in the status bar when its Claude Code session
# rings the terminal bell (permission prompt / task done while unfocused).
# bell-action=none stops tmux from ever passing the actual BEL through to
# Alacritty (no beep, no flash) -- monitor-bell's per-window tracking for the
# status-line highlight is independent of that and keeps working.
setw -g monitor-bell on
set -g bell-action none

# Minimal status bar (session + window list only), styled to match the Nord
# theme already used in alacritty.toml.
set -g status-position bottom
set -g status-style "bg=#2E3440,fg=#D8DEE9"
set -g status-left " #S "
set -g status-left-length 20
set -g status-right ""
setw -g window-status-current-style "bg=#88C0D0,fg=#2E3440,bold"
setw -g window-status-current-format " #I:#W "
setw -g window-status-format " #I:#W "
setw -g window-status-style "fg=#4C566A"
setw -g window-status-bell-style "bg=#BF616A,fg=#2E3440,bold"

set -g pane-border-style "fg=#3B4252"
set -g pane-active-border-style "fg=#88C0D0"