#!/usr/bin/env bash
# Part of JoeyLib, Copyright (c) 2026 Scott Duensing, under the MIT License.
# See LICENSE.md for license information.
# SPDX-License-Identifier: MIT
#
# verify-web-joy.sh - Joystick gate for the web port: both sticks, every
# direction, both buttons and every release, driven through the page's
# Gamepad API and read back from what examples/joy draws; then the pads
# unplugged while JOY runs.
#
# The port is the SDL3 backend built with Emscripten: SDL reads the
# browser's gamepads (navigator.getGamepads) and the backend opens the
# first two as JOYSTICK_0 and JOYSTICK_1, the left stick, the south button
# as button 0 and the east as button 1. The gate's pads stand in for the
# browser's (webDriver.mjs --gamepads: standard-mapping pads, connected from
# the start, driven by pad: steps), so nothing plugged into this machine
# is seen. JOY runs in headless Chromium at one canvas pixel per stage
# pixel; the step script takes a canvas shot after every change, and the
# shots then go through scripts/lib/joyScreen.py (scripts/lib/joyGate.sh)
# in order. Unplugging must leave both sticks disconnected.
#
# Usage:   scripts/verify-web-joy.sh
# Env:     JOY_SHOTS  also keep the screenshots in this folder
# Requires: Chromium and Node (install emulator:web), python3 + PIL;
#           build/web/bin/JOY (make web).
set -uo pipefail

repo=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
source "$repo/scripts/lib/joeyEnv.sh"
source "$repo/scripts/lib/joyGate.sh"
source "$repo/scripts/lib/webGate.sh"
webNeed

JOY_LABEL=verify-web-joy
JOY_SCALE=1
# The checks read shots the driver has already taken: no waiting, and none
# taken again.
JOY_PRESS_SECONDS=0
JOY_SHOT_TRIES=1
program=$(joeyExampleProgram joy web)
startSeconds=3      # the page loaded and JOY drawing
changeSeconds=0.3   # a change until JOY has drawn it
wall=120            # the driver's own cap

[ -f "$program" ] || { echo "$JOY_LABEL: build JOY first (make web)" >&2; exit 2; }

JOY_WORK=$(mktemp -d -t joeylib-web-joy.XXXXXX)
cleanup() {
    webStop
    rm -rf "$JOY_WORK"
}
trap cleanup EXIT

shotIndex=0
shotCount=0
script=()


joyPress() {
    :
}


joyRelease() {
    :
}


joyShot() {
    shotIndex=$((shotIndex + 1))
    [ -s "$JOY_WORK/shots/$(printf '%03d' "$shotIndex").png" ] || return 1
    cp "$JOY_WORK/shots/$(printf '%03d' "$shotIndex").png" "$1"
}


# shoot -- a shot step, numbered in the order the checks read them.
shoot() {
    shotCount=$((shotCount + 1))
    script+=(--step "wait:$changeSeconds" --step "shot:$JOY_WORK/shots/$(printf '%03d' "$shotCount").png")
}


mkdir -p "$JOY_WORK/shots"
script+=(--step "wait:$startSeconds")
shoot
for step in "${JOY_STEPS_TWO_STICKS[@]}"; do
    IFS='|' read -r _ held _ _ <<< "$step"
    controls="${held// /,}"
    script+=(--step "pad:press:$controls")
    shoot
    script+=(--step "pad:release:$controls")
    shoot
done
script+=(--step "pad:unplug")
shoot

webServe "$(dirname "$program")"
webDrive "$(basename "$program")?scale=1&aspect=square" --gamepads --seconds "$wall" "${script[@]}" 2> "$JOY_WORK/driver.log" ||
    { echo "$JOY_LABEL: FAIL - the page could not be driven" >&2; tail -10 "$JOY_WORK/driver.log" >&2; exit 1; }

joyCheck "rest" "A=$JOY_REST B=$JOY_REST"
joyRunSteps "${JOY_STEPS_TWO_STICKS[@]}"
joyCheck "pads unplugged" "A=$JOY_ABSENT B=$JOY_ABSENT"

joyResult "$JOY_LABEL" "both pads, every direction, both buttons and every release; unplugged, both sticks gone"