#!/bin/sh

#
# This is a regression test for window resizing in Mosh.  Making it
# happen is a little kludgy: we have to create other panes in tmux and
# resize them.  But it works!
#

# shellcheck source=e2e-test-subrs
. "$(dirname "$0")/e2e-test-subrs"
PATH=$PATH:.:$srcdir
# Top-level wrapper.
if [ $# -eq 0 ]; then
    e2e-test "$0" tmux baseline
    exit
fi

tmux_resize_commands()
{
    hv=$1
    shrink=$2
    grow=$3
    # Split the window into two panes.
    printf "split-window -%s\n" "${hv}"
    # Shrink the pane we created
    for i in $(seq 1 10); do
	sleepf
	printf "resize-pane -%s\n" "${shrink}"
    done
    # And grow it
    for i in $(seq 1 10); do
	sleepf
	printf "resize-pane -%s\n" "${grow}"
    done
    sleep 1
    # Remove the pane we created.
    printf "kill-pane\n"
}

tmux_commands()
{
    # An interactive shell is waiting for us in the mosh session.
    # Start a full screen application that will redraw on window
    # resize.
    printf "send-keys 'less \"%s\"' 0x0d\n" "${srcdir}/e2e-test"
    sleep 1
    # we control the horizontal...
    tmux_resize_commands v D U
    sleep 1
    # and the vertical.
    tmux_resize_commands h L R
    sleep 1
    # Exit less.
    printf "send-keys 'q'\n"
    sleep 1
    # Exit mosh session shell.
    printf "send-keys 'exit 0' 0x0d\n"
    # need to sleep extra long here, to let child commands complete,
    # and not have tmux exit prematurely
    sleep 5
}

tmux_stdin()
{
    tmux_commands | "$@"
    exit
}

baseline()
{
    # Just start an interactive shell and wait.  The tmux action drives.
    sh
}

case $1 in
    tmux)
	shift;
	tmux_stdin "$@";;
    baseline)
	baseline;;
    *)
	fail "unknown test argument %s\n" "$1";;
esac