extends Node
## Frame and simulation cost in a real match scene at representative maximum occupation:
## six armies at the supply cap and a round-13 wave (synthetic fixture, gold granted to the
## fixture only). VSync off; figures apply to this machine only.
## Run: godot --path . --resolution 1920x1080 res://tools/luneraria/lune_benchmark.tscn
const Game = preload("res://scripts/luneraria/lune_game.gd")
func _ready() -> void:
	call_deferred("run")
func run() -> void:
	Soundscape.enabled = false
	DisplayServer.window_set_vsync_mode(DisplayServer.VSYNC_DISABLED)
	var t0: int = Time.get_ticks_usec()
	var game: Node3D = Game.new()
	add_child(game)
	game.start({"seed": 5, "human_slot": 0})
	var build_ms: float = (Time.get_ticks_usec() - t0) / 1000.0
	var state: LuneMatch = game.match_state
	state.round_number = 13
	for slot: int in range(6):
		state.players[slot].draft.gold = 100000
		state.players[slot].draft.roster.clear()
		LuneBot.plan(state, slot, "ausgewogen")
	game._on_ready()
	game.camera.look_at_point(Vector3(-10, 0, 10), 34.0, true)
	for i in 30: await get_tree().process_frame
	RenderingServer.viewport_set_measure_render_time(get_viewport().get_viewport_rid(), true)
	var frames: Array[float] = []
	var gpu: Array[float] = []
	var sim: Array[float] = []
	var draws: Array[float] = []
	var mobile: Array[int] = []
	var last: int = Time.get_ticks_usec()
	var end: int = Time.get_ticks_msec() + 8000
	game.speed_index = 1
	while Time.get_ticks_msec() < end and state.phase == LuneMatch.Phase.COMBAT:
		var s0: int = Time.get_ticks_usec()
		var before: int = state.combat.steps
		await RenderingServer.frame_post_draw
		var now: int = Time.get_ticks_usec()
		frames.append((now - last) / 1000.0)
		last = now
		gpu.append(RenderingServer.viewport_get_measured_render_time_gpu(get_viewport().get_viewport_rid()))
		draws.append(Performance.get_monitor(Performance.RENDER_TOTAL_DRAW_CALLS_IN_FRAME))
		mobile.append(state.combat.mobile_count())
	# Pure simulation cost of one fixed step at this occupation, measured separately.
	var probe := LuneMatch.new()
	probe.setup({"seed": 5, "human_slot": -1})
	probe.round_number = 13
	for slot: int in range(6):
		probe.players[slot].draft.gold = 100000
		LuneBot.plan(probe, slot, "ausgewogen")
	probe.begin_combat()
	var start_units: int = probe.combat.mobile_count()
	var s1: int = Time.get_ticks_usec()
	for i in 200:
		probe.step_combat()
	var step_ms: float = (Time.get_ticks_usec() - s1) / 1000.0 / 200.0
	frames.sort()
	var mean := func(v: Array) -> float:
		var t: float = 0.0
		for x in v: t += float(x)
		return t / maxf(1, v.size())
	var report := {"window": get_window().size, "renderer": RenderingServer.get_current_rendering_method(), "gpu": RenderingServer.get_video_adapter_name(),
		"cpu": OS.get_processor_name(), "engine": Engine.get_version_info().string, "scene_build_ms": build_ms,
		"mobile_units_at_start": start_units, "mobile_units_mean_measured": mean.call(mobile), "buildings": 18,
		"frames": frames.size(), "frame_ms_mean": mean.call(frames), "frame_ms_p95": frames[int(frames.size() * .95)] if frames.size() > 0 else -1,
		"gpu_ms_mean": mean.call(gpu), "draw_calls_mean": mean.call(draws), "sim_step_ms": step_ms, "sim_speed": "2x (40 steps/s)",
		"video_mem_mb": Performance.get_monitor(Performance.RENDER_VIDEO_MEM_USED) / 1048576.0,
		"static_mem_mb": Performance.get_monitor(Performance.MEMORY_STATIC) / 1048576.0}
	var file := FileAccess.open("res://docs/luneraria/logs/perf-%dx%d.json" % [get_window().size.x, get_window().size.y], FileAccess.WRITE)
	file.store_string(JSON.stringify(report, "\t"))
	file.close()
	print("LUNE_BENCH ", JSON.stringify(report))
	get_tree().quit()