## Reference in-process Atlas agent driver (T-971, D-226 item 4) — the
## SANCTIONED way to drive the Atlas headlessly via AtlasAgentInterface,
## replacing the five hand-rolled scratch eyeball drivers the T-1183/T-1157
## harness rounds produced ad hoc. Every real navigation call below goes
## through AtlasAgentInterface.act()/observe() — this file does not touch
## `_gui_input`, does not synthesize pixel events, and does not reach into
## any screen's private fields.
##
## Folds in two of the T-1157 harness-techniques inventory patterns
## (pql ticket show T-1157):
##   1. InputSwallower — a root-level Node, added first, low process_priority,
##      whose _input()/_unhandled_input() both call
##      get_viewport().set_input_as_handled() unconditionally. Neutralizes
##      real desktop input reaching this `-s` SceneTree driver's window
##      (X11/XWayland can deliver pointer events to an unfocused window under
##      the cursor on a shared desktop) — this driver runs real production
##      code via method calls, but the WINDOW still exists and can still
##      receive stray input, so the guard applies here too.
##   4. Full-run-restart-on-anomaly (documented, not code-enforced — see
##      _run() header note below): any assertion failure here should discard
##      the whole run rather than retrying mid-sequence, matching the
##      inventory's "partial retries silently corrupt the state the
##      comparison depends on" finding. This driver's own job list is short
##      and idempotent per invocation (fresh process each run), so the
##      discipline is "don't loop-retry a failed step in place" rather than a
##      literal restart mechanism.
##
## Technique 5 (fixed-center revisit) is what `jump_to_center` (this file's
## own `_run_job("jump_to_center", ...)` dispatch) exists to exercise —
## AtlasAgentInterface's production seam for it, not reimplemented here.
##
## Usage (JSON job list on stdin path, matching visual_capture.gd's own
## `-- --flag value` CLI convention):
##   godot --rendering-driver opengl3 --path client \
##     -s res://tests/atlas_agent_driver.gd -- \
##     --jobs res://tests/fixtures/atlas_agent_smoke_jobs.json \
##     --output /abs/path/observe_log.json
##
## Each job is {"intent": "...", "params": {...}}; "observe" is a
## pseudo-intent this driver special-cases to call
## AtlasAgentInterface.observe() instead of act() (observe takes no params).
## The full sequence of act()/observe() results is written to --output as a
## JSON array — the smoke test (test_atlas_agent_driver_smoke.gd) reads this
## back to assert the reference driver actually completes a real session.
extends SceneTree

var _jobs_path: String = ""
var _output_path: String = ""
var _results: Array = []


func _init():
	_run.call_deferred()


func _run() -> void:
	_parse_args()

	if _jobs_path.is_empty():
		push_error("atlas_agent_driver: --jobs PATH is required")
		quit(1)
		return
	if _output_path.is_empty():
		push_error("atlas_agent_driver: --output PATH is required")
		quit(1)
		return

	var jobs: Array = _load_jobs(_jobs_path)
	if jobs.is_empty():
		push_error("atlas_agent_driver: no jobs loaded from %s" % _jobs_path)
		quit(1)
		return

	var main_scene = load("res://scenes/main.tscn")
	var main_node = main_scene.instantiate()

	# Technique 1 (T-1157 inventory) — InputSwallower, added FIRST so its low
	# process_priority still runs before anything that might otherwise react
	# to stray desktop input reaching this unfocused/off-screen window.
	var swallower := _InputSwallower.new()
	swallower.process_priority = -1000
	root.add_child(swallower)

	root.add_child(main_node)

	# Settle frames — camera smoothing, fog uniform init, UI layout (same
	# rationale as visual_capture.gd's own settle-frame pass).
	for i in range(10):
		await process_frame

	var atlas_agent_interface := load("res://ui/implant/apps/atlas/atlas_agent_interface.gd")
	var atlas_agent_bridge: Node = root.get_node("/root/AtlasAgentBridge")

	for job: Dictionary in jobs:
		var intent: String = str(job.get("intent", ""))
		var params: Dictionary = job.get("params", {})
		var result: Dictionary
		if intent == "observe":
			result = atlas_agent_interface.observe(atlas_agent_bridge.current_app)
		else:
			result = atlas_agent_interface.act(atlas_agent_bridge.current_app, intent, params)
			# Settle-until-ready (T-1157 inventory item 2's underlying discipline,
			# applied generically here rather than per-navigation-intent): a few
			# frames after every mutating call so the resulting screen/viewer
			# state (panel rebuilds, queue_redraw()) has actually applied before
			# the NEXT job's observe() reads it.
			for i in range(4):
				await process_frame
		_results.append({"intent": intent, "params": params, "result": result})

	_write_output(_output_path, _results)
	quit()


func _parse_args() -> void:
	var args := OS.get_cmdline_user_args()
	var i := 0
	while i < args.size():
		match args[i]:
			"--jobs":
				i += 1
				if i < args.size():
					_jobs_path = args[i]
			"--output":
				i += 1
				if i < args.size():
					_output_path = args[i]
		i += 1


static func _load_jobs(path: String) -> Array:
	var abs_path: String = path
	if path.begins_with("res://"):
		abs_path = ProjectSettings.globalize_path(path)
	var f := FileAccess.open(abs_path, FileAccess.READ)
	if f == null:
		return []
	var text := f.get_as_text()
	f.close()
	var parsed: Variant = JSON.parse_string(text)
	return parsed if parsed is Array else []


static func _write_output(path: String, results: Array) -> void:
	var f := FileAccess.open(path, FileAccess.WRITE)
	if f == null:
		push_error("atlas_agent_driver: cannot open output path %s" % path)
		return
	f.store_string(JSON.stringify(results, "  "))
	f.close()


## T-1157 inventory item 1 — see this file's own header doc for the full
## rationale. A tiny inner class rather than a separate file: this pattern
## has exactly one consumer (this driver) today: promote to a shared
## `client/tests/` helper the moment a second `-s` driver needs it.
class _InputSwallower:
	extends Node

	func _input(_event: InputEvent) -> void:
		get_viewport().set_input_as_handled()

	func _unhandled_input(_event: InputEvent) -> void:
		get_viewport().set_input_as_handled()