# test_mob_drop_scatter_parity.gd —— 怪物死亡爆装与辐射散射 1:1 回归测试套件
# 运行方式：
#   /opt/homebrew/bin/godot --headless --path metin2-client/project --script test_mob_drop_scatter_parity.gd
extends SceneTree

const MobDropScatter = preload("res://mob_drop_scatter.gd")

var _passed := 0
var _failed := 0

func _assert(cond: bool, msg: String) -> void:
	if cond:
		_passed += 1
		print("  [PASS] %s" % msg)
	else:
		_failed += 1
		printerr("  [FAIL] %s" % msg)

func _init() -> void:
	print("\n=== Running test_mob_drop_scatter_parity (Direction 2: Drop Scatter & Ownership 1:1) ===")
	_test_single_drop_offset()
	_test_multi_drop_radial_scatter()
	_test_ownership_protection_window()
	_test_drop_sounds()
	_finish()

func _test_single_drop_offset() -> void:
	print("\n--- Test 1: Single Drop Offset [-1.4m, +1.4m] (char_battle.cpp) ---")
	for seed_val in range(10):
		var offset := MobDropScatter.calculate_scatter_offset(0, 1, seed_val)
		_assert(offset.x >= -1.4 and offset.x <= 1.4, "Seed %d dx within [-1.4m, 1.4m]" % seed_val)
		_assert(offset.z >= -1.4 and offset.z <= 1.4, "Seed %d dz within [-1.4m, 1.4m]" % seed_val)
		_assert(offset.y == 0.0, "Y offset is 0.0 (ground plane)")

func _test_multi_drop_radial_scatter() -> void:
	print("\n--- Test 2: Multi-Item Boss Drop Radial Scatter ---")
	var center := Vector3(100.0, 10.0, 50.0)
	var count := 6
	var positions: Array[Vector3] = []
	for i in range(count):
		var pos := MobDropScatter.calculate_drop_position(center, i, count, 42)
		positions.append(pos)
		var dist := (pos - center).length()
		_assert(dist >= 0.95 and dist <= 1.75, "Item %d scatter radius is %.2fm (expected 1.0~1.6m)" % [i, dist])

	# Check that items do not overlap (pairwise distance > 0.5m)
	for i in range(count):
		for j in range(i + 1, count):
			var d := (positions[i] - positions[j]).length()
			_assert(d > 0.5, "Item %d and %d separated by %.2fm (no pile overlap)" % [i, j, d])

func _test_ownership_protection_window() -> void:
	print("\n--- Test 3: 30-Second Ownership Protection Window ---")
	var drop_time := 100.0
	_assert(MobDropScatter.is_ownership_protected(drop_time, 105.0) == true, "Protected at 5 seconds")
	_assert(MobDropScatter.remaining_ownership_time(drop_time, 105.0) == 25.0, "25 seconds remaining at 5s")

	_assert(MobDropScatter.is_ownership_protected(drop_time, 129.5) == true, "Protected at 29.5 seconds")
	_assert(MobDropScatter.is_ownership_protected(drop_time, 130.1) == false, "Expired after 30 seconds")
	_assert(MobDropScatter.remaining_ownership_time(drop_time, 135.0) == 0.0, "Remaining time clamped to 0 after expiry")

func _test_drop_sounds() -> void:
	print("\n--- Test 4: Drop Sound Assignment ---")
	_assert(MobDropScatter.get_drop_sound(true) == "sound/ui/money.wav", "Gold drop uses money.wav")
	_assert(MobDropScatter.get_drop_sound(false) == "sound/ui/drop.wav", "Item drop uses drop.wav")

func _finish() -> void:
	print("\n=== SUMMARY: %d passed, %d failed ===" % [_passed, _failed])
	if _failed == 0:
		print("ALL TESTS PASSED!\n")
		quit(0)
	else:
		printerr("SOME TESTS FAILED!\n")
		quit(1)