#!/usr/bin/env bash
#
# scripts/test-gfx.sh — automated graphics round-trip test.
#
# Builds kernel, boots headless, runs the in-kernel gfx self-test and
# the draw/paint demo.
#
# Env: OVMF, QEMU, SYSTEM_IMG
#
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
cd "$PROJECT_DIR"

OVMF="${OVMF:-/usr/share/edk2/x64/OVMF.4m.fd}"
QEMU="${QEMU:-qemu-system-x86_64}"
SYSTEM_IMG="${SYSTEM_IMG:-/tmp/system.img}"
QPID=/tmp/rsdos-gfx-qpid
SOCK=/tmp/rsdos-gfx-qmon.sock
LOG=/tmp/rsdos-gfx-serial.log
QLOG=/tmp/rsdos-gfx-qemu.log

trap 'kill "$(cat "$QPID" 2>/dev/null)" 2>/dev/null || true' EXIT

fail() {
	echo "FAIL: $1"
	[ -f "$LOG" ] && tail -40 "$LOG"
	exit 1
}

wait_log() {
	local i=0
	while [ "$i" -lt $((${3:-60} * 10)) ]; do
		grep -q "$2" "$1" 2>/dev/null && return 0
		sleep 0.1
		i=$((i + 1))
	done
	return 1
}

echo "==> 1/5 build kernel (debug)"
cargo build --package rsdos --target x86_64-unknown-uefi

echo "==> 2/5 stage system image"
"$SCRIPT_DIR/mksystem.sh" --force "$SYSTEM_IMG"

echo "==> 3/5 boot QEMU (headless)"
kill "$(cat "$QPID" 2>/dev/null)" 2>/dev/null || true
sleep 1
rm -f "$SOCK" "$LOG"
"$QEMU" -bios "$OVMF" \
	-drive file="$SYSTEM_IMG",format=raw,if=none,id=disk \
	-device ide-hd,drive=disk,bus=ide.0 \
	-serial file:"$LOG" \
	-monitor unix:"$SOCK",server,nowait \
	-m 256M -machine q35 -cpu qemu64 -no-reboot -display none \
	>"$QLOG" 2>&1 &
echo $! >"$QPID"

wait_log "$LOG" "boot: entering shell" 90 || fail "kernel never reached the shell"
wait_log "$LOG" "cursor: task " 10 || fail "cursor task did not spawn"

echo "==> 4/5 in-kernel pixel self-test (gfx check)"
python3 "$SCRIPT_DIR/sendkeys.py" --sock "$SOCK" "gfx check"
wait_log "$LOG" "gfx: check" 30 || fail "gfx check did not run"

echo "==> 5/5 gfx demo (draw scene)"
python3 "$SCRIPT_DIR/sendkeys.py" --sock "$SOCK" "gfx" "poweroff"
wait_qemu_exit() {
	local i=0
	while [ "$i" -lt $((${1:-30} * 10)) ]; do
		kill -0 "$(cat "$QPID" 2>/dev/null)" 2>/dev/null || return 0
		sleep 0.1
		i=$((i + 1))
	done
	return 1
}
wait_qemu_exit 30 || fail "QEMU did not exit after poweroff"

grep -aq "gfx: drew status bar" "$LOG" || fail "gfx demo did not draw"

echo ""
echo "PASS — gfx round trip"