## Sprint 20 #558: dialogue_box.gd decoupling tests.
##
## Verifies D-020 compliance: dialogue_box.gd emits signals instead of mutating
## GameState or calling AudioManager directly. main.gd wires the signal handlers.
##
## D-030: fixture-based, server-free, no subprocess required.
class_name TestDialogueSprint20
extends GdUnitTestSuite


func _make_dialogue_box() -> Control:
	if not ResourceLoader.exists("res://ui/dialogue_box.tscn"):
		push_warning("TestDialogueSprint20: dialogue_box.tscn not found — scene tests skipped")
		return null
	var node: Control = load("res://ui/dialogue_box.tscn").instantiate()
	add_child(node)
	return node


func before_test() -> void:
	GameState.dialogue_active = false


func after_test() -> void:
	GameState.dialogue_active = false


# -- dialogue_state_changed signal -------------------------------------------

func test_show_dialogue_emits_dialogue_state_changed_true() -> void:
	## show_dialogue() must emit dialogue_state_changed(true) not mutate GameState directly.
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	var received: Variant = null
	box.dialogue_state_changed.connect(func(active: bool): received = active)
	box.show_dialogue("NPC", "Hello.", [])
	assert_that(received).override_failure_message(
		"show_dialogue() must emit dialogue_state_changed(true) (#558)"
	).is_equal(true)


func test_show_dialogue_does_not_mutate_game_state_directly() -> void:
	## Without a connected handler, GameState.dialogue_active must stay false.
	## Proves dialogue_box.gd has zero direct GameState mutation (D-020 #558).
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	GameState.dialogue_active = false
	box.show_dialogue("NPC", "Hello.", [])
	assert_bool(GameState.dialogue_active).override_failure_message(
		"dialogue_box must not mutate GameState.dialogue_active directly (D-020 #558)"
	).is_false()


func test_hide_dialogue_emits_dialogue_state_changed_false() -> void:
	## hide_dialogue() must emit dialogue_state_changed(false).
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	box.show_dialogue("NPC", "Hello.", [])
	var received: Variant = null
	box.dialogue_state_changed.connect(func(active: bool): received = active)
	box.hide_dialogue()
	assert_that(received).override_failure_message(
		"hide_dialogue() must emit dialogue_state_changed(false) (#558)"
	).is_equal(false)


# -- audio_dip_requested / audio_dip_cleared signals -------------------------

func test_show_dialogue_emits_audio_dip_requested_dialogue() -> void:
	## show_dialogue() must emit audio_dip_requested("dialogue") not call AudioManager.
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	var received_profile: Variant = null
	box.audio_dip_requested.connect(func(profile: String): received_profile = profile)
	box.show_dialogue("NPC", "Hello.", [])
	assert_that(received_profile).override_failure_message(
		"show_dialogue() must emit audio_dip_requested('dialogue') (#558)"
	).is_equal("dialogue")


func test_show_dialogue_does_not_call_audio_manager_directly() -> void:
	## Without a connected handler, AudioManager state must be unchanged by show_dialogue().
	## Verifies no direct AudioManager call in dialogue_box.gd (D-020 #558).
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	var dip_before := AudioManager.get_active_dip()
	box.show_dialogue("NPC", "Hello.", [])
	var dip_after := AudioManager.get_active_dip()
	assert_str(dip_after).override_failure_message(
		"dialogue_box must not call AudioManager.apply_dip() directly (D-020 #558)"
	).is_equal(dip_before)


func test_hide_dialogue_emits_audio_dip_cleared() -> void:
	## Ending a conversation must emit audio_dip_cleared not call AudioManager directly.
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	box.show_dialogue("NPC", "Hello.", [])
	var cleared := false
	box.audio_dip_cleared.connect(func(): cleared = true)
	box.hide_dialogue()
	assert_bool(cleared).override_failure_message(
		"hide_dialogue() must emit audio_dip_cleared (#558)"
	).is_true()


func test_audio_dip_cleared_count_on_conversation_end() -> void:
	## Verify audio_dip_cleared fires when conversation ends.
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	var cleared_count := 0
	box.audio_dip_cleared.connect(func(): cleared_count += 1)
	box.show_dialogue("NPC", "Speak.", [])
	box.hide_dialogue()
	assert_int(cleared_count).override_failure_message(
		"audio_dip_cleared must fire at least once when conversation ends (#558)"
	).is_greater_equal(1)


# -- coordinator wiring verification -----------------------------------------

func test_signal_handler_wires_game_state() -> void:
	## Simulate main.gd: connect dialogue_state_changed to update GameState.dialogue_active.
	## Verifies the coordinator pattern works end-to-end (D-020 #558).
	var box := _make_dialogue_box()
	if box == null: return
	auto_free(box)
	box.dialogue_state_changed.connect(func(active: bool): GameState.dialogue_active = active)
	box.show_dialogue("NPC", "Hello.", [])
	assert_bool(GameState.dialogue_active).override_failure_message(
		"With handler wired, GameState.dialogue_active must be true after show_dialogue (#558)"
	).is_true()
	box.hide_dialogue()
	assert_bool(GameState.dialogue_active).override_failure_message(
		"With handler wired, GameState.dialogue_active must be false after hide_dialogue (#558)"
	).is_false()