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### Options ###

# Setting the Prefix from Ctrl+b to Ctrl+s
unbind C-b
set -g prefix C-s
#set -g prefix M-Space

# Ensure that we can send Ctrl+s to other apps
bind C-s send-prefix

# Setting the delay between Prefix and Command
set -sg escape-time 10
#set-option -sg escape-time 10

# Reload tmux with <Prefix>r
#bind r source-file ~/.tmux.conf \; display "Reloaded!"
bind r source-file ~/.config/tmux/tmux.conf \; display "Reloaded!"

# Use <Prefix>Ctrl+l to clear terminal
bind C-l send-keys 'C-l'

# Scrollback 
#set -g history-limit 10000

# Mouse
set -g mouse on
#set -g mouse-select-pane on
#set -g mouse-resize-pane on
#set -g mouse-select-window on

# Focus events, allow supported requests from applications to passthrough/run in tmux
set-option -g focus-events on

# Update the TERM variable of terminal emulator when creating a new session or attaching a existing session
set -g update-environment 'DISPLAY SSH_ASKPASS SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY TERM'


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### Window Movement/Control ###

# Aggressive resizing, useful when using "grouped sessions" and multi-monitor setup
setw -g aggressive-resize on

# Popup scratch session
#bind -n M-g display-popup -E "tmux new-session -A -s scratch"

# Toggle popup scratch session
bind-key -n M-g if-shell -F '#{==:#{session_name},scratch}' {
detach-client
} {
display-popup -E "tmux new-session -A -s scratch"
}

# Non-popup
#bind C-k new-window -n "session-switcher" "\
#    tmux list-sessions -F '#{?session_attached,,#{session_name}}' |\
#    sed '/^$/d' |\
#    fzf --reverse --header jump-to-session --preview 'tmux capture-pane -pt {}'  |\
#    xargs tmux switch-client -t"

# Popup
bind -n M-f display-popup -E "\
    tmux list-sessions -F '#{?session_attached,,#{session_name}}' |\
    sed '/^$/d' |\
    fzf --reverse --header jump-to-session --preview 'tmux capture-pane -pt {}'  |\
    xargs tmux switch-client -t"

# Quick window select
bind -n M-? list-keys
bind -n M-1 select-window -t :=1
bind -n M-2 select-window -t :=2
bind -n M-3 select-window -t :=3
bind -n M-4 select-window -t :=4
bind -n M-5 select-window -t :=5
bind -n M-6 select-window -t :=6
bind -n M-7 select-window -t :=7
bind -n M-8 select-window -t :=8
bind -n M-9 select-window -t :=9
bind -n M-0 select-window -t :=0


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### Pane Movement/Control ###

# Smart pane switching with awareness of Vim splits.
# See: https://github.com/christoomey/vim-tmux-navigator
is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|l?n?vim?x?)(diff)?$'"
bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

# Copy Mode vi-directional keys
bind-key -T copy-mode-vi 'C-h' select-pane -L
bind-key -T copy-mode-vi 'C-j' select-pane -D
bind-key -T copy-mode-vi 'C-k' select-pane -U
bind-key -T copy-mode-vi 'C-l' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

# Change horizontal split <Prefix>% and Vertical split <Prefix>" to <Prefix>h and <Prefix>v respectively and change current working directory
bind v split-window -h -c "#{pane_current_path}"
bind h split-window -v -c "#{pane_current_path}"

# Pane resizing, <Prefix> then shift + vi-directional keys, default is D,U,L,R
bind -r H resize-pane -L 20
bind -r J resize-pane -D 20
bind -r K resize-pane -U 20
bind -r L resize-pane -R 20

# Pane resizing, <Prefix> then alt + vi-directional keys
bind-key M-j resize-pane -D 5
bind-key M-k resize-pane -U 5
bind-key M-h resize-pane -L 5
bind-key M-l resize-pane -R 5

# Hide a pane and bring it back with <Prefix>! and <Prefix>@ respectively
bind-key ! break-pane -d -n _hidden_pane
bind-key @ join-pane -s $.0

# Send Pane to another session/window
bind-key j command-prompt -p "send pane to:"  "join-pane -t '%%'"


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### Copy Mode (Copy/Paste) ###

# Set Vi copy mode, use <prefix>[ to enter copy mode
setw -g mode-keys vi # `<prefix>:list-keys -T copy-mode-vi` to confirm

# Change selection <space> and enter to vi keybinding
bind-key -T copy-mode-vi 'v' send -X begin-selection
bind-key -T copy-mode-vi 'y' send -X copy-selection-and-cancel

# Copy to system clipboard (requires xclip)
if-shell -b 'echo $XDG_SESSION_TYPE | grep -q x11' "\
    bind-key -T copy-mode-vi 'y' send-keys -X copy-pipe-and-cancel 'xclip -in -selection clipboard > /dev/null'; \
    bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'xclip -in -selection clipboard > /dev/null'; \
    bind-key C-M-v run 'xclip -out -selection clipboard | tmux load-buffer - ; tmux paste-buffer'"

# Wayland support
if-shell -b 'echo $XDG_SESSION_TYPE | grep -q wayland' "\
    bind-key -T copy-mode-vi 'y' send-keys -X copy-pipe-and-cancel 'wl-copy'; \
    bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'wl-copy'; \
    bind-key C-p run 'wl-paste --no-newline | tmux load-buffer - ; tmux paste-buffer'" "\
    \
    bind-key -T copy-mode-vi 'y' send-keys -X copy-pipe-and-cancel 'cat - >/dev/clipboard'; \
    bind-key -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel 'cat - >/dev/clipboard'; \
    bind-key C-M-v run 'cat /dev/clipboard | tmux load-buffer - ; tmux paste-buffer'"


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### Colors ###

# Set 256 color terminal
set-option -sa terminal-overrides ",tmux-256color:Tc"
#set-option -sa terminal-overrides ",xterm*:Tc,alacritty*:Tc"

# Colors for pane borders(default)
setw -g pane-border-style fg=white
setw -g pane-active-border-style fg=green

# Active pane normal, other shaded out
setw -g window-style fg=colour240
setw -g window-active-style fg=white


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### Status ###

set -g status-position bottom # [top, bottom]
set -g status on
set -g status-interval 1
set -g status-style fg=#50fa7b,bg=default

## Left
#set -g status-left ""
set -g status-left-length 60
set -g status-left "#[fg=#50fa7b,bg=default]#[bg=#50fa7b,fg=black] ❐ #S #[fg=#50fa7b,bg=default]"

## Centre
set -g window-status-current-format "#[bg=default,fg=#50fa7b]#[fg=black,bg=#50fa7b] #I:#W #[bg=default,fg=#50fa7b]"
set -g status-justify absolute-centre

## Right
set-option -g status-right ""
set -g status-right-length 60
set -g status-right "#[fg=#50fa7b,bg=default] #{?client_prefix,#[reverse] Prefix #[noreverse] ,} #[bg=default,fg=#50fa7b]#[bg=#50fa7b,fg=black] %H:%M #[bg=default,fg=#50fa7b]"

## Reload Status with IP addr, Cpu, Mem and Date
bind a run-shell ~/.config/tmux/tmux-toggle-option.sh

## Reload Config/Status silently
bind b source-file ~/.config/tmux/tmux.conf


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### Plugin Install ###

set -g @plugin "tmux-plugins/tpm"
#set -g @plugin "tmux-plugins/tmux-sensible"
set -g @plugin "tmux-plugins/tmux-resurrect"
set -g @plugin "tmux-plugins/tmux-continuum"
set -g @plugin "christoomey/vim-tmux-navigator"
#set -g @plugin "tmux-plugins/tmux-yank"


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### Plugins Settings ###

# Plugin to save and restore tmux sessions after restart
# * Save with: <Prefix> + Ctrl-s
# * Restore with: <Prefix> + Ctlr-r
# Change default save and restore keybindings
  set -g @resurrect-save "W" # <Prefix> + W
  set -g @resurrect-restore "E" # <Prefix> + E

# Restore vim and nvim sessions as well
# For vim:
  set -g @resurrect-strategy-vim "session"
# For neovim:
  set -g @resurrect-strategy-nvim "session"

# Automatic restore
  #set -g @continuum-restore "on"
  #set -g @continuum-boot "on"

# Restore Panes
  set -g @resurrect-capture-pane-contents "on"

# This is a hook for tmux-resurrect which tells it to kill session 0 before restoring the panels
  set -g @resurrect-hook-pre-restore-pane-processes "tmux switch-client -n && tmux kill-session -t=0"

# Plugin uninstall
  # Delete or comment out the plugin in .tmux.conf.
  # Press <prefix> + alt + u to remove the plugin.

# TMUX plugin manager (keep at the bottom of tmux.conf)
  #run -b "~/.tmux/plugins/tpm/tpm"
run -b "~/.config/tmux/plugins/tpm/tpm"


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