# test_mail_system_parity.gd —— 40250 游戏内邮箱系统 1:1 纯净回归测试套件
extends SceneTree

const MailSystem = preload("res://mail_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_mail_system_parity (Direction 4: In-Game Mailbox 1:1) ===")
	_test_mail_sending_validation()
	_test_mail_reading_and_unread_count()
	_test_attachment_claiming()
	_test_delete_protection()
	_test_mail_expiry_cleanup()
	_finish()

func _test_mail_sending_validation() -> void:
	print("\n--- Test 1: Mail Sending Validation & Postage (1000 Yang) ---")
	var ms := MailSystem.new()
	var player_data := {"gold": 500} # Less than postage 1000
	var inv: Array = [null]

	# Empty recipient
	var r1 = ms.send_mail("PlayerA", "", "Title", "Body", player_data, inv)
	_assert(r1["ok"] == false and r1["reason"] == "EMPTY_RECIPIENT", "Empty recipient rejected")

	# Insufficient Yang for postage
	var r2 = ms.send_mail("PlayerA", "PlayerB", "Title", "Body", player_data, inv)
	_assert(r2["ok"] == false and r2["reason"] == "INSUFFICIENT_YANG", "Blocked when gold < postage fee")

	# Locked item cannot be mailed
	player_data["gold"] = 10000
	inv[0] = {"vnum": 10, "name": "木剑", "is_locked": true}
	var r3 = ms.send_mail("PlayerA", "PlayerB", "Title", "Body", player_data, inv, 0)
	_assert(r3["ok"] == false and r3["reason"] == "ITEM_LOCKED", "Locked item rejected for mailing")

	# Valid sending without attachment
	var send_data := {"fired": false, "id": 0}
	ms.mail_sent.connect(func(mid: int, _s: String, _r: String):
		send_data["fired"] = true
		send_data["id"] = mid
	)

	var r4 = ms.send_mail("PlayerA", "PlayerB", "问候信", "你好，这是测试邮件！", player_data, inv)
	_assert(r4["ok"] == true, "Mail sent successfully")
	_assert(player_data["gold"] == 9000, "1000 Yang postage deducted (10000 -> 9000)")
	_assert(send_data["fired"] == true and send_data["id"] == 1, "mail_sent signal fired with id 1")
	_assert(ms.get_unread_count("PlayerB") == 1, "PlayerB has 1 unread mail")

func _test_mail_reading_and_unread_count() -> void:
	print("\n--- Test 2: Mail Reading & Unread Counter ---")
	var ms := MailSystem.new()
	var player_data := {"gold": 10000}
	var inv: Array = [null]

	ms.send_mail("Alice", "Bob", "Hello", "World", player_data, inv)
	_assert(ms.get_unread_count("Bob") == 1, "Initial unread count is 1")

	var unread_signal := {"fired": false, "count": -1}
	ms.unread_count_changed.connect(func(_rec: String, cnt: int):
		unread_signal["fired"] = true
		unread_signal["count"] = cnt
	)

	# Read mail
	var res = ms.read_mail(1, "Bob")
	_assert(res["ok"] == true, "Mail read successfully")
	_assert(res["mail"]["is_read"] == true, "is_read is true")
	_assert(ms.get_unread_count("Bob") == 0, "Unread count updated to 0")
	_assert(unread_signal["fired"] == true and unread_signal["count"] == 0, "unread_count_changed signal fired with 0")

	# Reading non-existent mail
	var r_fail = ms.read_mail(999, "Bob")
	_assert(r_fail["ok"] == false and r_fail["reason"] == "MAIL_NOT_FOUND", "Non-existent mail returns error")

func _test_attachment_claiming() -> void:
	print("\n--- Test 3: Gold & Item Attachment Sealing and Claiming ---")
	var ms := MailSystem.new()
	var sender_data := {"gold": 100000}
	var sender_inv: Array = [
		{"vnum": 11299, "name": "黑钢甲+9", "count": 1},
		null
	]

	# Send mail with 50,000 Yang and armor in slot 0
	var send_res = ms.send_mail(
		"Sender",
		"Receiver",
		"珍贵赠礼",
		"请收下这件黑钢甲和金币！",
		sender_data,
		sender_inv,
		0,      # attach slot 0
		50000   # attach 50,000 gold
	)
	_assert(send_res["ok"] == true, "Mail with attachments sent")
	_assert(sender_data["gold"] == 49000, "51,000 Yang deducted (50k gold + 1k postage)")
	_assert(sender_inv[0] == null, "Attached item removed from sender inventory")

	# Receiver inbox
	var receiver_data := {"gold": 10000}
	var receiver_inv: Array = [null, null]

	var claim_signal := {"fired": false, "id": 0}
	ms.attachment_claimed.connect(func(mid: int):
		claim_signal["fired"] = true
		claim_signal["id"] = mid
	)

	# Claim attachments
	var claim_res = ms.claim_attachments(1, "Receiver", receiver_data, receiver_inv)
	_assert(claim_res["ok"] == true, "Attachments claimed successfully")
	_assert(claim_signal["fired"] == true and claim_signal["id"] == 1, "attachment_claimed signal fired")
	_assert(receiver_data["gold"] == 60000, "Receiver gold increased by 50,000 (10k -> 60k)")
	_assert(receiver_inv[0] != null and receiver_inv[0]["vnum"] == 11299, "Attached armor received into inventory")

	# Double claiming yields nothing
	var claim_again = ms.claim_attachments(1, "Receiver", receiver_data, receiver_inv)
	_assert(claim_again["claimed_gold"] == 0 and claim_again["claimed_item"] == null, "No attachments left to claim")

func _test_delete_protection() -> void:
	print("\n--- Test 4: Delete Protection on Unclaimed Attachments ---")
	var ms := MailSystem.new()
	var s_data := {"gold": 50000}
	var s_inv: Array = [{"vnum": 10, "name": "木剑", "count": 1}]

	ms.send_mail("A", "B", "Item Mail", "Body", s_data, s_inv, 0, 10000)

	# Trying to delete before claiming attachments
	var del_blocked = ms.delete_mail(1, "B")
	_assert(del_blocked["ok"] == false and del_blocked["reason"] == "HAS_UNCLAIMED_ATTACHMENTS", "Deletion blocked while attachments unclaimed")

	# Claim attachments
	var b_data := {"gold": 0}
	var b_inv: Array = [null]
	ms.claim_attachments(1, "B", b_data, b_inv)

	# Now deletion succeeds
	var del_ok = ms.delete_mail(1, "B")
	_assert(del_ok["ok"] == true, "Mail deleted after attachments claimed")
	_assert(ms.get_inbox("B").is_empty(), "B inbox is now empty")

func _test_mail_expiry_cleanup() -> void:
	print("\n--- Test 5: 30-Day Expiry Cleanup ---")
	var ms := MailSystem.new()
	var s_data := {"gold": 10000}
	var s_inv: Array = [null]

	# Send mail at time 0
	ms.send_mail("A", "B", "Old Mail", "Body", s_data, s_inv, -1, 0, 0.0)
	_assert(ms.get_inbox("B").size() == 1, "1 mail exists")

	# Clean up at day 15 (15 * 86400 = 1296000) -> not expired
	var c1 = ms.cleanup_expired_mails(1296000.0)
	_assert(c1 == 0, "0 mails cleaned at 15 days")
	_assert(ms.get_inbox("B").size() == 1, "Mail still intact")

	# Clean up at day 31 (31 * 86400 = 2678400) -> expired!
	var c2 = ms.cleanup_expired_mails(2678400.0)
	_assert(c2 == 1, "1 mail cleaned after 30 days")
	_assert(ms.get_inbox("B").size() == 0, "Expired mail was removed")

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