# ╭──────╮
# │ tmux │
# ╰──────╯

# ╭──────┬───────────┬────────╮
# │ tmux │ constants │ values │
# ╰──────┴───────────┴────────╯

RWX_TMUX_MAIN_BACKGROUND="#080808"
RWX_TMUX_MAIN_FOREGROUND="white"

RWX_TMUX_MESSAGE_BACKGROUND="red"
RWX_TMUX_MESSAGE_FOREGROUND="white"

# ╭──────┬───────────┬──────────╮
# │ tmux │ constants │ commands │
# ╰──────┴───────────┴──────────╯

RWX_TMUX_BORDER_BACKGROUND="#[bg=##181818]"

RWX_TMUX_ITEM_BACKGROUND="#[bg=##282828]"
RWX_TMUX_ITEM_FOREGROUND="#[fg=yellow]"

RWX_TMUX_PATH_FOREGROUND="#[fg=cyan]"

RWX_TMUX_PREFIX_CHARACTER="p"
RWX_TMUX_PREFIX_FOREGROUND="#[fg=red]"

RWX_TMUX_RESET="\
#[bg=default]\
#[fg=default]\
"

RWX_TMUX_SESSION_MANY="#[fg=red]"
RWX_TMUX_SESSION_ONE="#[fg=green]"

# ╭──────┬───────────╮
# │ tmux │ functions │
# ╰──────┴───────────╯

# attach
#= tma
rwx_tmux_attach() {
	local server="${1}"
	if [ -n "${server}" ]; then
		tmux -L "${server}" attach-session
	else
		rwx_tmux_list
	fi
}

# kill
#= tmk
rwx_tmux_kill() {
	local server="${1}"
	if [ -n "${server}" ]; then
		tmux -L "${server}" kill-server 2>"/dev/null"
	else
		rwx_tmux_list
	fi
}

# list
#= tml
rwx_tmux_list() {
	local user_id
	user_id="$(id --user)"
	ls "/tmp/tmux-${user_id}"
}

# ╭──────┬──────╮
# │ tmux │ help │
# ╰──────┴──────╯

# display key bindings
#= tmh
rwx_tmux_help() {
	# TODO pad constants
	rwx_log "\
                    ╭─────────────────────┬─────────────╮
                    │ rwx                 │ tmux        │
                    ├───────────┬─────────┼─────┬───────┤
                    │ -n        │ F12     │ -n  │ C-b   │
╭───────────────────┼───────────┼─────────┼─────┼───────┤
│ command-prompt    │           │         │     │ :     │
│ copy-mode         │           │         │     │ PPage │
│ detach-client     │ F6        │         │     │ d     │
│ kill-server       │           │ k       │     │       │
│ kill-session      │ S-M-Up    │         │     │       │
│ kill-window       │ S-M-Left  │         │     │       │
│ new-session       │ S-M-Down  │         │     │       │
│ new-window        │ S-M-Right │         │     │ c     │
│ next-window       │ M-Right   │         │     │ n     │
│ previous-window   │ M-Left    │         │     │ p     │
│ rename-session    │           │ C-s     │     │       │
│ rename-window     │           │ C-w     │     │       │
│ resize-pane -Z    │           │         │     │ z     │
│ select-layout -n  │ M-Home    │         │     │       │
│ select-layout -p  │ M-End     │         │     │       │
│ select-pane -D    │ C-S-Down  │         │     │       │
│ select-pane -L    │ C-S-Left  │         │     │       │
│ select-pane -R    │ C-S-Right │         │     │       │
│ select-pane -U    │ C-S-Up    │         │     │       │
│ set -g mouse      │           │ M       │     │       │
│ set -g status off │ C-F6      │         │     │       │
│ set -g status on  │ C-F1      │         │     │       │
│ set -g status 2   │ C-F2      │         │     │       │
│ set -g status 3   │ C-F3      │         │     │       │
│ set -g status 4   │ C-F4      │         │     │       │
│ set -g status 5   │ C-F5      │         │     │       │
│ source-file       │           │ r       │     │       │
│ split-window -h   │           │ h       │     │ %     │
│ split-window -v   │           │ v       │     │ \"     │
│ swap-window -t -1 │           │ M-Left  │     │       │
│ swap-window -t +1 │           │ M-Right │     │       │
│ switch-client -n  │ M-Down    │         │     │       │
│ switch-client -p  │ M-Up      │         │     │       │
│ synchronize-panes │           │ S       │     │       │
╰───────────────────┴───────────┴─────────┴─────┴───────╯
"
}

# ╭──────┬──────╮
# │ tmux │ item │
# ╰──────┴──────╯

rwx_tmux_item_date() {
	printf "%s" "\
${RWX_TMUX_ITEM_FOREGROUND}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}%Y-%m-%d\
${RWX_TMUX_BORDER_BACKGROUND} \
"
}

rwx_tmux_item_host() {
	printf "%s" "\
${RWX_TMUX_ITEM_FOREGROUND}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}#{host}\
${RWX_TMUX_BORDER_BACKGROUND} \
"
}

rwx_tmux_item_session() {
	printf "%s" "\
#{?session_many_attached,${RWX_TMUX_SESSION_MANY},\
#{?session_attached,${RWX_TMUX_SESSION_ONE},${RWX_TMUX_ITEM_FOREGROUND}}}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}#{session_name}\
${RWX_TMUX_BORDER_BACKGROUND} \
"
}

rwx_tmux_item_time() {
	printf "%s" "\
${RWX_TMUX_ITEM_FOREGROUND}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}%H:%M:%S\
${RWX_TMUX_BORDER_BACKGROUND}#{?client_prefix,\
${RWX_TMUX_PREFIX_FOREGROUND}${RWX_TMUX_PREFIX_CHARACTER}, }\
"
}

rwx_tmux_item_user() {
	# TODO constants
	printf "%s" "\
#{?uid,#[fg=green],#[fg=red]}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}#{user}\
${RWX_TMUX_BORDER_BACKGROUND} \
"
}

rwx_tmux_item_window() {
	printf "%s" "\
${RWX_TMUX_BORDER_BACKGROUND}#{?window_zoomed_flag,\
#{?pane_synchronized,#[fg=magenta][,#[fg=red][},\
#{?pane_synchronized,#[fg=blue][, }}\
\
#{?window_active,#[fg=green],\
#{?window_activity_flag,#[fg=red],${RWX_TMUX_ITEM_FOREGROUND}}}\
${RWX_TMUX_ITEM_BACKGROUND}#{window_name}\
\
${RWX_TMUX_BORDER_BACKGROUND}#{?window_zoomed_flag,\
#{?pane_synchronized,#[fg=magenta]],#[fg=red]]},\
#{?pane_synchronized,#[fg=blue]], }}\
"
}

# ╭──────┬───────╮
# │ tmux │ setup │
# ╰──────┴───────╯

#= tms
#/ tmux_setup
rwx_tmux_setup() {
	local file script
	if rwx_root; then
		file="/etc/tmux.conf"
		script="/etc/tmux.sh"
	else
		file="${HOME}/.tmux.conf"
		script="${HOME}/.tmux.sh"
	fi
	# FIXME skip parsing these functions
	rwx_file_write "${script}" "\
# ╭─────┬──────┬────────╮
# │ rwx │ tmux │ script │
# ╰─────┴──────┴────────╯

# return current server socket name
rwx_tmux_server() {
	basename \"\${TMUX}\" |
		cut \\
		--delimiter \",\" \\
		--fields \"1\"
}

# return active & current servers socket names
rwx_tmux_servers() {
	local active name root sockets text
	active=\"\$(rwx_tmux_server)\"
	root=\"\$(dirname \"\${TMUX}\")\"
	sockets=\"\$(find \"\${root}\" -type s -printf \"%P\\n\")\"
	while IFS= read -r name; do
		if tmux -L \"\${name}\" list-sessions >/dev/null; then
			text=\"\${text}\\
${RWX_TMUX_RESET} \\
\"
			if [ \"\${name}\" = \"\${active}\" ]; then
				text=\"\${text}#[fg=green]\"
			else
				text=\"\${text}${RWX_TMUX_ITEM_FOREGROUND}\"
			fi
			text=\"\${text}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
${RWX_TMUX_ITEM_BACKGROUND}\${name}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
\"
		fi
	done <<EOF
\${sockets}
EOF
	echo \"\${text}\"
}

# set status lines option
# off, on, 2, 3, 4, 5
rwx_tmux_status() {
	local current=\"\${1}\"
	local operand=\"\${2}\"
	case \"\${operand}\" in
	\"+\")
		case \"\${current}\" in
		\"off\") current=\"on\" ;;
		\"on\") current=\"2\" ;;
		\"2\") current=\"3\" ;;
		\"3\") current=\"4\" ;;
		\"4\") current=\"5\" ;;
		*) ;;
		esac
		;;
	\"-\")
		case \"\${current}\" in
		\"on\") current=\"off\" ;;
		\"2\") current=\"on\" ;;
		\"3\") current=\"2\" ;;
		\"4\") current=\"3\" ;;
		\"5\") current=\"4\" ;;
		*) ;;
		esac
		;;
	*) ;;
	esac
	tmux set-option -g status \"\${current}\"
}

# render uptime date & time
rwx_tmux_uptime() {
	local since=\"\$(uptime --since)\"
	local date=\"\$(echo \"\${since}\" | awk '{print \$1}')\"
	local time=\"\$(echo \"\${since}\" | awk '{print \$2}')\"
	echo \"\\
${RWX_TMUX_ITEM_FOREGROUND}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
${RWX_TMUX_ITEM_BACKGROUND}\${date}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
${RWX_TMUX_RESET} \\
${RWX_TMUX_ITEM_FOREGROUND}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
${RWX_TMUX_ITEM_BACKGROUND}\${time}\\
${RWX_TMUX_BORDER_BACKGROUND} \\
\"
}
"
	local date host session time user window
	date="$(rwx_tmux_item_date)"
	host="$(rwx_tmux_item_host)"
	session="$(rwx_tmux_item_session)"
	space="${RWX_TMUX_RESET} "
	time="$(rwx_tmux_item_time)"
	user="$(rwx_tmux_item_user)"
	window="$(rwx_tmux_item_window)"
	rwx_file_write "${file}" "\
# ╭────────╮
# │ option │
# ╰────────╯

# empty name for windows
set-option -g automatic-rename on
set-option -g automatic-rename-format '#{pane_current_command}'

# first index number
set-option -g base-index 1

# display duration
set-option -g display-time 1536

# extend history limit
set-option -g history-limit 1048576

# style for messages
set-option -g message-style '\
bg=${RWX_TMUX_MESSAGE_BACKGROUND},fg=${RWX_TMUX_MESSAGE_FOREGROUND}'

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

# silence monitoring
set-window-option -g monitor-silence 0

# enable mouse actions
set-option -g mouse on

# prefix with ^B or F12
set-option -g prefix C-b
set-option -g prefix2 F12

# renumber windows after closing one
set-option -g renumber-windows on

# enable title
set-option -g set-titles on

# set title to working directory
set-option -g set-titles-string '\
#(sh -c \". ${script}; rwx_tmux_server\")\
 / \
#{session_name}\
 / \
#{window_name}\
 / \
#{pane_current_command}\
 - \
#{window_width}×#{window_height}\
 / \
#{pane_width}×#{pane_height}\
'

# ╭────────┬──────╮
# │ option │ pane │
# ╰────────┴──────╯

# first index number
set-option -g pane-base-index 1

# ╭────────┬──────┬────────╮
# │ option │ pane │ border │
# ╰────────┴──────┴────────╯

# active style
set-option -g pane-active-border-style fg=green

# regular style
set-option -g pane-border-style fg=blue

# ╭────────┬────────╮
# │ option │ status │
# ╰────────┴────────╯

# status lines
set-option -g status 2

# background color
set-option -g status-bg '${RWX_TMUX_MAIN_BACKGROUND}'

# foreground color
set-option -g status-fg '${RWX_TMUX_MAIN_FOREGROUND}'

# line 1
set-option -g status-format[0] '\
#{W:\
${window}\
${space}\
}\
${space}\
\
#[align=right]\
\
${date}\
${space}\
${time}\
'

# line 2
set-option -g status-format[1] '\
#{S:\
${session}\
${space}\
}\
${space}\
\
#[align=right]\
\
#(sh -c \". ${script}; rwx_tmux_servers\")\
'

# line 3
set-option -g status-format[2] '\
${RWX_TMUX_PATH_FOREGROUND}#{pane_current_path}\
'

# line 4
set-option -g status-format[3] '\
#{P:\
#{?pane_active,#[fg=green],${RWX_TMUX_ITEM_FOREGROUND}}\
${RWX_TMUX_BORDER_BACKGROUND} \
${RWX_TMUX_ITEM_BACKGROUND}#{pane_current_command}\
${RWX_TMUX_BORDER_BACKGROUND} \
${space}\
}\
${space}\
\
#[align=right]\
\
'

# line 5
set-option -g status-format[4] '\
${user}\
${space}\
${host}\
${space}\
\
#[align=right]\
\
#(sh -c \". ${script}; rwx_tmux_uptime\")\
'

# refresh period
set-option -g status-interval 1

# bar location
set-option -g status-position bottom

# ╭─────╮
# │ key │
# ╰─────╯

# detach client
bind-key -n F6 detach-client

# kill
bind-key -n S-M-Up kill-session
bind-key -n S-M-Left kill-window

# new
bind-key -n S-M-Down new-session
bind-key -n S-M-Right new-window
# like byobu
bind-key -n F2 new-window

# select layout
bind-key -n M-Home select-layout -n
bind-key -n M-End select-layout -p

# select pane
bind-key -n C-S-Down select-pane -D
bind-key -n C-S-Left select-pane -L
bind-key -n C-S-Right select-pane -R
bind-key -n C-S-Up select-pane -U

# status lines
bind-key -n C-F6 set-option -g status off
bind-key -n C-F1 set-option -g status on
bind-key -n C-F2 set-option -g status 2
bind-key -n C-F3 set-option -g status 3
bind-key -n C-F4 set-option -g status 4
bind-key -n C-F5 set-option -g status 5
bind-key -n M-NPage run-shell '. ${script}; rwx_tmux_status #{status} -'
bind-key -n M-PPage run-shell '. ${script}; rwx_tmux_status #{status} +'

# switch session
bind-key -n M-Down switch-client -n
bind-key -n M-Up switch-client -p

# switch window
bind-key -n M-Left previous-window
bind-key -n M-Right next-window

# ╭─────┬────────╮
# │ key │ prefix │
# ╰─────┴────────╯

# rename
bind-key C-s command-prompt { rename-session '%%' }
bind-key C-w command-prompt { rename-window '%%' }

# split window
bind-key h split-window -c '#{pane_current_path}' -h
bind-key v split-window -c '#{pane_current_path}' -v

# kill server
bind-key k kill-server

# reload configuration
bind-key r source-file ${file} \
\\; display-message 'source-file ${file}'

# toggle mouse
bind-key M set-option -g mouse \
\\; display-message 'mouse = #{mouse}'

# swap window
bind-key M-Left swap-window -t -1
bind-key M-Right swap-window -t +1

# synchronize panes
bind-key S set-window-option synchronize-panes \
\\; display-message 'sync = #{synchronize-panes}'
"
}