extends GutTest

## Tests for the AbilitySystem and related components


func test_target_selector_instantiates() -> void:
	var selector = TargetSelector.new()
	assert_not_null(selector, "TargetSelector should instantiate")


func test_trigger_matcher_instantiates() -> void:
	var matcher = TriggerMatcher.new()
	assert_not_null(matcher, "TriggerMatcher should instantiate")


func test_effect_resolver_instantiates() -> void:
	var resolver = EffectResolver.new()
	assert_not_null(resolver, "EffectResolver should instantiate")


func test_field_effect_manager_instantiates() -> void:
	var manager = FieldEffectManager.new()
	assert_not_null(manager, "FieldEffectManager should instantiate")


func test_field_effect_manager_clear() -> void:
	var manager = FieldEffectManager.new()
	manager.clear_all()
	assert_eq(manager.get_active_ability_count(), 0, "Should have no active abilities after clear")


func test_target_selector_empty_spec() -> void:
	var selector = TargetSelector.new()
	var result = selector.get_valid_targets({}, null, null)
	assert_eq(result.size(), 0, "Empty spec should return empty array")


func test_trigger_matcher_event_matching() -> void:
	var matcher = TriggerMatcher.new()

	# Test direct event match
	assert_true(matcher._event_matches("ATTACKS", "ATTACKS"), "Direct match should work")

	# Test enters field variations
	assert_true(matcher._event_matches("ENTERS_FIELD", "CARD_PLAYED"), "ENTERS_FIELD should match CARD_PLAYED")

	# Test leaves field variations
	assert_true(matcher._event_matches("LEAVES_FIELD", "FORWARD_BROKEN"), "LEAVES_FIELD should match FORWARD_BROKEN")


func test_trigger_matcher_source_matching() -> void:
	var matcher = TriggerMatcher.new()

	# ANY should always match
	var event_data = {"card": null}
	assert_true(matcher._source_matches("ANY", event_data, null, null), "ANY source should always match")