extends GdUnitTestSuite

## NEO-85: cast accept + target lock change trigger combat-target GET refresh.

const CastClient := preload("res://scripts/ability_cast_client.gd")
const CombatTargetsClient := preload("res://scripts/combat_targets_client.gd")


class MockCastTransport:
	extends Node
	signal request_completed(
		result: int, response_code: int, headers: PackedStringArray, body: PackedByteArray
	)
	var body_json: String = (
		'{"schemaVersion":1,"accepted":true,"combatResolution":'
		+ '{"abilityId":"prototype_pulse","targetId":"prototype_npc_melee",'
		+ '"damageDealt":25,"targetRemainingHp":75,"targetDefeated":false}}'
	)

	func request(
		_url: String,
		_custom_headers: PackedStringArray = PackedStringArray(),
		_method: HTTPClient.Method = HTTPClient.METHOD_POST,
		_request_data: String = ""
	) -> Error:
		request_completed.emit(
			HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), body_json.to_utf8_buffer()
		)
		return OK


class SpyCombatTargetsClient:
	extends Node
	var sync_calls: int = 0

	func request_sync_from_server() -> void:
		sync_calls += 1


class CombatRefreshHarness:
	extends Node
	var combat_sync_calls: int = 0
	var last_target_state: Dictionary = {}
	var _cast: Node
	var _combat: SpyCombatTargetsClient

	func setup(parent: Node, cast_transport: Node) -> void:
		_combat = SpyCombatTargetsClient.new()
		_cast = CastClient.new()
		_cast.set("injected_http", cast_transport)
		parent.add_child(_cast)
		parent.add_child(_combat)
		_cast.connect("cast_result_received", Callable(self, "_on_cast_result"))
		last_target_state = {}

	func _on_cast_result(accepted: bool, _reason_code: String, _resolution: Dictionary) -> void:
		if not accepted:
			return
		_request_combat_targets_refresh()

	func _request_combat_targets_refresh() -> void:
		combat_sync_calls += 1
		_combat.request_sync_from_server()

	func on_target_state_changed(state: Dictionary) -> void:
		var prev_lock := _locked_target_id_from_state(last_target_state)
		last_target_state = state.duplicate()
		var new_lock := _locked_target_id_from_state(last_target_state)
		if new_lock != prev_lock:
			_request_combat_targets_refresh()

	func _locked_target_id_from_state(state: Dictionary) -> String:
		var locked_variant: Variant = state.get("lockedTargetId", null)
		if locked_variant is String:
			return (locked_variant as String).strip_edges()
		return ""

	func request_cast() -> void:
		_cast.call("request_cast", 0, "prototype_pulse", "prototype_npc_melee")


func test_successful_cast_triggers_combat_target_sync() -> void:
	# Arrange
	var transport := MockCastTransport.new()
	var harness := CombatRefreshHarness.new()
	auto_free(transport)
	auto_free(harness)
	add_child(harness)
	harness.setup(self, transport)
	monitor_signals(harness._cast)
	# Act
	harness.request_cast()
	# Assert
	await assert_signal(harness._cast).is_emitted("cast_result_received", true, "", any())
	assert_that(harness.combat_sync_calls).is_equal(1)
	assert_that(harness._combat.sync_calls).is_equal(1)


func test_target_lock_change_triggers_combat_target_sync() -> void:
	# Arrange
	var transport := MockCastTransport.new()
	var harness := CombatRefreshHarness.new()
	auto_free(transport)
	auto_free(harness)
	add_child(harness)
	harness.setup(self, transport)
	# Act
	harness.on_target_state_changed(
		{"lockedTargetId": "prototype_npc_melee", "validity": "ok", "sequence": 1}
	)
	# Assert
	assert_that(harness.combat_sync_calls).is_equal(1)
	assert_that(harness._combat.sync_calls).is_equal(1)


func test_target_validity_only_update_skips_combat_target_sync() -> void:
	# Arrange
	var transport := MockCastTransport.new()
	var harness := CombatRefreshHarness.new()
	auto_free(transport)
	auto_free(harness)
	add_child(harness)
	harness.setup(self, transport)
	harness.on_target_state_changed(
		{"lockedTargetId": "prototype_npc_melee", "validity": "ok", "sequence": 1}
	)
	# Act
	harness.on_target_state_changed(
		{"lockedTargetId": "prototype_npc_melee", "validity": "out_of_range", "sequence": 2}
	)
	# Assert
	assert_that(harness.combat_sync_calls).is_equal(1)