# test_inventory_sort_parity.gd —— 40250 多页背包与智能自动整理 1:1 纯净回归测试套件
extends SceneTree

const InventorySortSystem = preload("res://inventory_sort_system.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_inventory_sort_parity (Direction 2: Inventory Sort & Stacking 1:1) ===")
	_test_page_switching()
	_test_stack_merging()
	_test_category_sorting_and_compaction()
	_finish()

func _test_page_switching() -> void:
	print("\n--- Test 1: Multi-Page Switching (Page 0 & Page 1, 90 Slots) ---")
	var iss := InventorySortSystem.new()

	var page_signal := {"fired": false, "page": -1}
	iss.page_switched.connect(func(p: int):
		page_signal["fired"] = true
		page_signal["page"] = p
	)

	# Invalid page
	var r_bad = iss.switch_page(2)
	_assert(r_bad["ok"] == false and r_bad["reason"] == "INVALID_PAGE", "Page 2 rejected (> max page 1)")

	# Page 0 (Slots 0..44)
	var r0 = iss.switch_page(0)
	_assert(r0["ok"] == true, "Page 0 switched successfully")
	_assert(r0["slot_start"] == 0 and r0["slot_end"] == 44, "Page 0 covers slots 0 to 44")
	_assert(page_signal["fired"] == true and page_signal["page"] == 0, "page_switched signal fired for 0")

	# Page 1 (Slots 45..89)
	var r1 = iss.switch_page(1)
	_assert(r1["ok"] == true, "Page 1 switched successfully")
	_assert(r1["slot_start"] == 45 and r1["slot_end"] == 89, "Page 1 covers slots 45 to 89")
	_assert(page_signal["page"] == 1, "page_switched signal fired for 1")

func _test_stack_merging() -> void:
	print("\n--- Test 2: Auto-Stack Merging (Max 200 Limit) ---")
	var iss := InventorySortSystem.new()
	var inv: Array = [
		{"vnum": 27003, "name": "红药水(大)", "item_type": "potion", "count": 50},  # Slot 0
		null,                                                                        # Slot 1
		{"vnum": 27003, "name": "红药水(大)", "item_type": "potion", "count": 80},  # Slot 2
		{"vnum": 27003, "name": "红药水(大)", "item_type": "potion", "count": 100}  # Slot 3
	]

	var merged = iss.merge_stacks(inv)
	_assert(merged == 2, "2 stack merges performed")

	# Slot 0 should have 50 + 80 + 70 = 200 (max cap)
	_assert(inv[0]["count"] == 200, "Slot 0 merged to max 200")
	# Slot 2 fully consumed into slot 0
	_assert(inv[2] == null, "Slot 2 consumed and set to null")
	# Slot 3 had 100, gave 70 to slot 0 -> 30 remaining
	_assert(inv[3] != null and inv[3]["count"] == 30, "Slot 3 has 30 remaining count")

func _test_category_sorting_and_compaction() -> void:
	print("\n--- Test 3: Category Sorting (Weapons -> Armors -> Consumables -> Materials -> Chests) ---")
	var iss := InventorySortSystem.new()

	var sort_signal := {"fired": false, "items": 0, "merged": 0}
	iss.inventory_sorted.connect(func(cnt: int, m: int):
		sort_signal["fired"] = true
		sort_signal["items"] = cnt
		sort_signal["merged"] = m
	)

	# Fragmented messy inventory
	var inv: Array = [
		{"vnum": 71084, "name": "高级附魔石", "item_type": "material", "count": 5}, # Mat
		null,
		{"vnum": 169, "name": "战神之剑+9", "item_type": "weapon"},                # Weapon
		{"vnum": 27003, "name": "红药水(大)", "item_type": "potion", "count": 10},  # Potion
		null,
		{"vnum": 11299, "name": "黑钢甲+9", "item_type": "armor"},                 # Armor
		{"vnum": 50006, "name": "九尾宝箱", "item_type": "chest"}                   # Chest
	]

	var res = iss.sort_inventory(inv)
	_assert(res["ok"] == true, "sort_inventory succeeded")
	_assert(res["total_items"] == 5, "5 total non-empty items sorted")
	_assert(sort_signal["fired"] == true and sort_signal["items"] == 5, "inventory_sorted signal fired")

	# Check exact order:
	# 1. Weapon (169)
	# 2. Armor (11299)
	# 3. Consumable (27003)
	# 4. Material (71084)
	# 5. Chest (50006)
	_assert(inv[0] != null and inv[0]["vnum"] == 169, "Slot 0 is Weapon (169)")
	_assert(inv[1] != null and inv[1]["vnum"] == 11299, "Slot 1 is Armor (11299)")
	_assert(inv[2] != null and inv[2]["vnum"] == 27003, "Slot 2 is Potion (27003)")
	_assert(inv[3] != null and inv[3]["vnum"] == 71084, "Slot 3 is Material (71084)")
	_assert(inv[4] != null and inv[4]["vnum"] == 50006, "Slot 4 is Chest (50006)")

	# Remaining slots compacted to null
	_assert(inv[5] == null and inv[6] == null, "Trailing slots compacted to null")

func _finish() -> void:
	print("\n==========================================")
	print("Inventory Sort Parity Test Results: %d Passed, %d Failed" % [_passed, _failed])
	print("==========================================")
	if _failed > 0:
		quit(1)
	else:
		quit(0)