extends Panel
## Server Admin Panel — Management for Users and Leaderboards.
## Features: User BAN/DELETE/ROLE management, Leaderboard score modification.

signal closed

# -- UI refs --
@onready var tabs := %Tabs as TabContainer
@onready var title_label := %Title as Label
@onready var count_label := %CountLabel as Label
@onready var refresh_btn := %RefreshBtn as Button
@onready var close_btn := %CloseBtn as Button
@onready var status_label := %StatusLabel as Label

# Tab: Users
@onready var user_tree := %UserTree as Tree
@onready var select_all_btn := %SelectAllBtn as Button
@onready var deselect_btn := %DeselectBtn as Button
@onready var selected_label := %SelectedLabel as Label
@onready var ban_btn := %BanBtn as Button
@onready var unban_btn := %UnbanBtn as Button
@onready var delete_btn := %DeleteBtn as Button
@onready var history_btn := %HistoryBtn as Button
@onready var history_dialog := %HistoryDialog as AcceptDialog
@onready var history_text := %HistoryText as RichTextLabel

# Tab: Leaderboards
@onready var lb_tree := %LeaderboardTree as Tree
@onready var sync_lb_btn := %SyncLeaderboardBtn as Button
@onready var reset_lb_btn := %ResetLBBtn as Button

# Tab: Daily Rewards
@onready var month_option_btn := %MonthOptionBtn as OptionButton
@onready var days_grid := %DaysGrid as GridContainer
@onready var day_config_template := %DayConfigTemplate as PanelContainer
@onready var load_dr_btn := %LoadDRConfigBtn as Button
@onready var save_dr_btn := %SaveDRConfigBtn as Button

var _daily_reward_config_data: Dictionary = {}
var _current_dr_month: String = ""

# Tab: Announcements
@onready var target_user_edit := %TargetUserEdit as LineEdit
@onready var find_user_btn := %FindUserBtn as Button
@onready var resolved_id_label := %ResolvedIdLabel as Label
@onready var title_edit := %TitleEdit as LineEdit
@onready var content_edit := %ContentEdit as TextEdit
@onready var start_date_edit := %StartDatePicker as Button
@onready var end_date_edit := %EndDatePicker as Button
@onready var add_reward_btn := %AddRewardBtn as Button
@onready var rewards_list := %RewardsList as VBoxContainer
@onready var reward_row_template := %RewardRowTemplate as HBoxContainer
@onready var send_mail_btn := %SendMailBtn as Button

var _resolved_user_id: String = ""

# Tab: Mail Manager
@onready var mail_tree := %MailTree as Tree
@onready var refresh_mail_btn := %RefreshMailBtn as Button
@onready var edit_mail_btn := %EditMailBtn as Button
@onready var end_mail_btn := %EndMailBtn as Button
@onready var delete_mail_server_btn := %DeleteMailServerBtn as Button

var _mail_root: TreeItem
var _all_server_mails: Array = []

# Tab: Shop (Featured Banners)
@onready var slots_vbox := %SlotsVBox as VBoxContainer
@onready var load_banners_btn := %LoadBannersBtn as Button
@onready var save_banners_btn := %SaveBannersBtn as Button

const MONTH_NAMES = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

# -- Data --
var all_users: Array = []
var lb_data: Array = []
var _user_root: TreeItem
var _lb_root: TreeItem

# -- Colors --
const CLR_BG := Color(0.1, 0.1, 0.12)
const CLR_HEADER := Color(0.85, 0.55, 0.2)
const CLR_TITLE := Color(0.95, 0.35, 0.35)
const CLR_TEXT := Color(0.82, 0.82, 0.82)
const CLR_DIM := Color(0.5, 0.5, 0.5)
const CLR_BANNED := Color(1.0, 0.3, 0.3)
const CLR_ADMIN := Color(0.4, 0.75, 1.0)
const CLR_MOD := Color(0.5, 0.9, 0.4)
const CLR_BTN_BAN := Color(1.0, 0.6, 0.2)
const CLR_BTN_UNBAN := Color(0.4, 0.8, 0.4)
const CLR_BTN_DEL := Color(1.0, 0.3, 0.3)
const CLR_STATUS_OK := Color(0.4, 0.9, 0.4)
const CLR_STATUS_ERR := Color(1.0, 0.3, 0.3)

func _ready() -> void:
	visible = false
	_apply_plain_style()
	_setup_columns()
	_connect_signals()

# =============================================================================
# Plain style (overrides any inherited theme)
# =============================================================================
func _apply_plain_style() -> void:
	title_label.add_theme_color_override("font_color", CLR_TITLE)
	title_label.add_theme_font_size_override("font_size", 22)
	count_label.add_theme_color_override("font_color", CLR_HEADER)
	status_label.add_theme_color_override("font_color", CLR_DIM)

	for btn: Button in [refresh_btn, close_btn, select_all_btn, deselect_btn, load_dr_btn, save_dr_btn]:
		_style_button(btn, Color(0.2, 0.2, 0.24), CLR_TEXT)
	_style_button(ban_btn, Color(0.3, 0.2, 0.1), CLR_BTN_BAN)
	_style_button(unban_btn, Color(0.1, 0.22, 0.1), CLR_BTN_UNBAN)
	_style_button(delete_btn, Color(0.28, 0.1, 0.1), CLR_BTN_DEL)
	_style_button(sync_lb_btn, Color(0.2, 0.2, 0.3), CLR_ADMIN)

	var tree_bg := StyleBoxFlat.new()
	tree_bg.bg_color = Color(0.12, 0.12, 0.14)
	tree_bg.set_corner_radius_all(4)
	
	for t: Tree in [user_tree, lb_tree]:
		t.add_theme_stylebox_override("panel", tree_bg)
		t.add_theme_color_override("font_color", CLR_TEXT)
		t.add_theme_color_override("title_button_color", CLR_HEADER)

func _style_button(btn: Button, bg_color: Color, text_color: Color) -> void:
	var sb := StyleBoxFlat.new()
	sb.bg_color = bg_color
	sb.set_corner_radius_all(4)
	sb.set_content_margin_all(6)
	btn.add_theme_stylebox_override("normal", sb)
	var sb_hover := sb.duplicate()
	sb_hover.bg_color = bg_color.lightened(0.15)
	btn.add_theme_stylebox_override("hover", sb_hover)
	btn.add_theme_color_override("font_color", text_color)

# =============================================================================
# Columns Setup
# =============================================================================
func _setup_columns() -> void:
	# Users
	user_tree.set_column_title(0, "☑")
	user_tree.set_column_title(1, "User ID")
	user_tree.set_column_title(2, "Username")
	user_tree.set_column_title(3, "Display Name")
	user_tree.set_column_title(4, "Created")
	user_tree.set_column_title(5, "Edit")
	user_tree.set_column_custom_minimum_width(0, 40)
	user_tree.set_column_expand(0, false)
	_user_root = user_tree.create_item()

	# Leaderboards
	lb_tree.set_column_title(0, "Rank")
	lb_tree.set_column_title(1, "Player")
	lb_tree.set_column_title(2, "High Score")
	lb_tree.set_column_title(3, "Wins")
	lb_tree.set_column_title(4, "Games")
	lb_tree.set_column_title(5, "Edit")
	lb_tree.set_column_expand(0, false)
	lb_tree.set_column_custom_minimum_width(0, 60)
	lb_tree.set_column_expand(5, false)
	lb_tree.set_column_custom_minimum_width(5, 60)
	_lb_root = lb_tree.create_item()

	# Mail Manager
	mail_tree.set_column_title(0, "Type")
	mail_tree.set_column_title(1, "Title")
	mail_tree.set_column_title(2, "Sender")
	mail_tree.set_column_title(3, "Start")
	mail_tree.set_column_title(4, "Expires")
	mail_tree.set_column_title(5, "Status")
	mail_tree.set_column_custom_minimum_width(0, 100)
	mail_tree.set_column_expand(0, false)
	mail_tree.set_column_custom_minimum_width(5, 80)
	mail_tree.set_column_expand(5, false)
	_mail_root = mail_tree.create_item()

func _connect_signals() -> void:
	close_btn.pressed.connect(_on_close)
	refresh_btn.pressed.connect(_on_refresh)
	tabs.tab_changed.connect(_on_tab_changed)
	
	# User actions
	select_all_btn.pressed.connect(_select_all)
	deselect_btn.pressed.connect(_deselect_all)
	ban_btn.pressed.connect(_on_ban)
	unban_btn.pressed.connect(_on_unban)
	delete_btn.pressed.connect(_on_delete)
	history_btn.pressed.connect(_on_history_pressed)
	user_tree.item_edited.connect(_on_user_tree_item_edited)
	user_tree.button_clicked.connect(_on_user_tree_button_clicked)
	
	# LB actions
	lb_tree.button_clicked.connect(_on_lb_tree_button_clicked)
	sync_lb_btn.pressed.connect(_on_sync_leaderboard)
	
	# DR actions
	load_dr_btn.pressed.connect(_load_daily_rewards_config)
	save_dr_btn.pressed.connect(_save_daily_rewards_config)
	month_option_btn.item_selected.connect(_on_dr_month_selected)
	
	# Announcement actions
	send_mail_btn.pressed.connect(_on_send_mail)
	add_reward_btn.pressed.connect(_on_add_reward_pressed)
	find_user_btn.pressed.connect(_on_find_user)
	target_user_edit.text_changed.connect(func(_t): _resolved_user_id = ""; resolved_id_label.text = "")
	
	# Mail Manager actions
	refresh_mail_btn.pressed.connect(func(): await _load_mail())
	mail_tree.item_selected.connect(_on_mail_item_selected)
	edit_mail_btn.pressed.connect(_on_edit_mail_pressed)
	end_mail_btn.pressed.connect(_on_end_mail_pressed)
	delete_mail_server_btn.pressed.connect(_on_delete_mail_server_pressed)
	_update_mail_action_btns(null)

	# Shop actions
	load_banners_btn.pressed.connect(func(): await _load_featured_banners())
	save_banners_btn.pressed.connect(func(): await _save_featured_banners())

# =============================================================================
# Core Panel Logic
# =============================================================================
func show_panel() -> void:
	visible = true
	_on_tab_changed(tabs.current_tab)

func _on_close() -> void:
	visible = false
	emit_signal("closed")

func _on_refresh() -> void:
	_on_tab_changed(tabs.current_tab)

func _on_tab_changed(tab_index: int) -> void:
	_set_status("")
	if tab_index == 0:
		await _load_users()
	elif tab_index == 1:
		await _load_leaderboard()
	elif tab_index == 2:
		await _load_daily_rewards_config()
	elif tab_index == 4:
		await _load_mail()
	elif tab_index == 5:
		await _load_featured_banners()

# =============================================================================
# RPC Helper
# =============================================================================
func _rpc(rpc_name: String, payload: Dictionary) -> Dictionary:
	if not NakamaManager.client or not NakamaManager.session:
		return {"error": "Not connected"}
	var result = await BackendService.api_rpc_async(rpc_name, JSON.stringify(payload))
	if result.get("success", false) == false:
		var err: String = str(result.get("message", "Unknown error"))
		_set_status(err, CLR_STATUS_ERR)
		return {"error": err}
	return result.get("data", {})

func _set_status(msg: String, color: Color = CLR_DIM) -> void:
	status_label.text = msg
	status_label.add_theme_color_override("font_color", color)

# =============================================================================
# TAB 1: USER MANAGEMENT
# =============================================================================
func _load_users() -> void:
	_clear_tree(user_tree, _user_root)
	_set_status("Loading users...")

	var res := await _rpc("admin_list_users", {})
	if res.has("error"):
		_set_status("Failed: " + str(res.error), CLR_STATUS_ERR)
		return

	var raw_users = res.get("users", [])
	all_users = raw_users if typeof(raw_users) == TYPE_ARRAY else []
	count_label.text = "%d users" % all_users.size()

	for user in all_users:
		var uid: String = user.get("user_id", "")
		var uname: String = user.get("username", "")
		var dname: String = user.get("display_name", uname)
		var role: String = user.get("role", "player")
		var banned: bool = user.get("banned", false)
		var created: String = str(user.get("create_time", ""))

		var item := _user_root.create_child()
		item.set_cell_mode(0, TreeItem.CELL_MODE_CHECK)
		item.set_editable(0, true)
		
		var short_id := uid.substr(0, 8) + "..."
		item.set_text(1, short_id)
		item.set_tooltip_text(1, uid)
		
		var uname_display := uname
		if role != "player": uname_display += " [%s]" % role.to_upper()
		if banned: uname_display += " (BANNED)"
		item.set_text(2, uname_display)
		item.set_text(3, dname)
		item.set_text(4, created.substr(0, 10) if created.length() > 10 else created)
		item.add_button(5, _get_edit_icon(), 0, false, "Edit User")

		if banned: item.set_custom_color(2, CLR_BANNED)
		elif role in ["admin", "owner"]: item.set_custom_color(2, CLR_ADMIN)
		
		item.set_metadata(0, user)

	_update_selection_count()
	_set_status("")

func _on_user_tree_item_edited() -> void:
	_update_selection_count()

func _update_selection_count() -> void:
	var count := _get_checked_items().size()
	selected_label.text = "%d selected" % count
	ban_btn.disabled = count == 0
	unban_btn.disabled = count == 0
	delete_btn.disabled = count == 0

func _on_user_tree_button_clicked(item: TreeItem, _col: int, _id: int, _mouse: int) -> void:
	_show_edit_user_dialog(item.get_metadata(0))

func _show_edit_user_dialog(user: Dictionary) -> void:
	var uid: String = user.get("user_id", "")
	var uname: String = user.get("username", "")
	var role: String = user.get("role", "player")
	var banned: bool = user.get("banned", false)

	var dialog := AcceptDialog.new()
	dialog.title = "Edit User: " + uname
	dialog.min_size = Vector2i(380, 260)
	var vbox := VBoxContainer.new()
	vbox.add_theme_constant_override("separation", 8)

	var id_lbl := Label.new()
	id_lbl.text = "User ID: " + uid
	id_lbl.add_theme_color_override("font_color", CLR_DIM)
	vbox.add_child(id_lbl)

	var role_hbox := HBoxContainer.new()
	var role_lbl := Label.new()
	role_lbl.text = "Role: "
	role_hbox.add_child(role_lbl)
	var role_option := OptionButton.new()
	var roles := ["player", "moderator", "admin"]
	for r in roles: role_option.add_item(r)
	role_option.selected = roles.find(role)
	role_hbox.add_child(role_option)
	vbox.add_child(role_hbox)

	var ban_check := CheckButton.new()
	ban_check.text = "Banned"
	ban_check.button_pressed = banned
	vbox.add_child(ban_check)

	var reason_input := LineEdit.new()
	reason_input.placeholder_text = "Ban reason..."
	reason_input.text = user.get("ban_reason", "")
	reason_input.visible = banned
	vbox.add_child(reason_input)
	ban_check.toggled.connect(func(on): reason_input.visible = on)

	var save_btn := Button.new()
	save_btn.text = "Save Changes"
	save_btn.custom_minimum_size.y = 36
	vbox.add_child(save_btn)

	dialog.add_child(vbox)
	add_child(dialog)
	dialog.popup_centered()

	save_btn.pressed.connect(func():
		var new_role: String = roles[role_option.selected]
		await _save_user_edit(uid, uname, new_role, ban_check.button_pressed, reason_input.text)
		dialog.queue_free()
	)

func _save_user_edit(uid: String, uname: String, new_role: String, new_banned: bool, reason: String) -> void:
	_set_status("Saving...")
	await _rpc("admin_set_user_role", {"user_id": uid, "role": new_role})
	if new_banned:
		await _rpc("admin_ban_player", {"user_id": uid, "reason": reason, "duration_hours": 0})
	else:
		await _rpc("admin_unban_player", {"user_id": uid})
	_set_status("Saved: " + uname, CLR_STATUS_OK)
	await _load_users()

# =============================================================================
# TAB 1: USER SELECTION BATCH ACTIONS
# =============================================================================
func _select_all() -> void:
	if not _user_root: return
	var item := _user_root.get_first_child()
	while item:
		item.set_checked(0, true)
		item = item.get_next()
	_update_selection_count()

func _deselect_all() -> void:
	if not _user_root: return
	var item := _user_root.get_first_child()
	while item:
		item.set_checked(0, false)
		item = item.get_next()
	_update_selection_count()

func _get_checked_items() -> Array[TreeItem]:
	var items: Array[TreeItem] = []
	if not _user_root: return items
	var item := _user_root.get_first_child()
	while item:
		if item.is_checked(0): items.append(item)
		item = item.get_next()
	return items

func _get_checked_user_data() -> Array:
	var data: Array = []
	for item in _get_checked_items():
		data.append(item.get_metadata(0))
	return data

func _on_ban() -> void:
	var users := _get_checked_user_data()
	if users.is_empty(): return
	var to_ban: Array = []
	for u in users:
		if u.get("banned", false): continue
		if u.get("role", "") in ["admin", "owner"]: continue
		to_ban.append(u)
	if to_ban.is_empty():
		_set_status("No eligible users to ban", CLR_STATUS_ERR)
		return

	var dialog := ConfirmationDialog.new()
	dialog.title = "Ban %d user(s)" % to_ban.size()
	var vbox := VBoxContainer.new()
	vbox.add_theme_constant_override("separation", 8)
	var list_names: Array = []
	for i in range(min(to_ban.size(), 10)): list_names.append(to_ban[i].get("username", ""))
	var name_str := ", ".join(list_names)
	if to_ban.size() > 10: name_str += "... and %d others" % (to_ban.size() - 10)
	var lbl := Label.new()
	lbl.text = "Ban following users:\n" + name_str
	lbl.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	lbl.custom_minimum_size = Vector2(350, 0)
	vbox.add_child(lbl)
	var reason_input := LineEdit.new()
	reason_input.placeholder_text = "Ban reason"
	vbox.add_child(reason_input)
	var dur := SpinBox.new()
	dur.min_value = 0; dur.max_value = 8760; dur.value = 24; dur.prefix = "Hours: "
	vbox.add_child(dur)
	dialog.add_child(vbox)
	add_child(dialog)
	dialog.popup_centered()
	dialog.confirmed.connect(func():
		var ok := 0
		for u in to_ban:
			var r := await _rpc("admin_ban_player", {"user_id": u.user_id, "reason": reason_input.text, "duration_hours": int(dur.value)})
			if r.get("success", false): ok += 1
		_set_status("Banned %d/%d" % [ok, to_ban.size()], CLR_STATUS_OK)
		await _load_users()
		dialog.queue_free()
	)

func _on_unban() -> void:
	var users := _get_checked_user_data()
	var to_unban := []; for u in users: if u.get("banned", false): to_unban.append(u)
	if to_unban.is_empty(): return
	var ok := 0
	for u in to_unban:
		var r := await _rpc("admin_unban_player", {"user_id": u.user_id})
		if r.get("success", false): ok += 1
	_set_status("Unbanned %d/%d" % [ok, to_unban.size()], CLR_STATUS_OK)
	await _load_users()

func _on_history_pressed() -> void:
	var selected_data = _get_checked_user_data()
	if selected_data.size() != 1:
		_set_status("Please select exactly ONE user to view history.", CLR_STATUS_ERR)
		return

	var uid = selected_data[0].get("user_id", "")
	_set_status("Fetching history for user...", CLR_STATUS_OK)
	var res = await _rpc("admin_get_user_history", {"user_id": uid})
	
	if res.has("error"):
		_set_status("Failed to get history: " + str(res.error), CLR_STATUS_ERR)
		return
	
	_set_status("History loaded.", CLR_STATUS_OK)
	
	var h = res.get("history", {})
	var text = "[b]=== USER HISTORY ===[/b]\n"
	text += "User ID: " + uid + "\n\n"
	
	# Logins
	text += "[b]-- Recent Logins --[/b]\n"
	var logins = h.get("logins", [])
	if logins.is_empty():
		text += "No recent logins found.\n"
	else:
		for l in logins:
			var time_str = Time.get_datetime_string_from_unix_time(int(l.get("time", 0)))
			text += "- %s (IP: %s)\n" % [time_str, l.get("ip", "unknown")]
			
	text += "\n"
	
	# Wallet Ledger
	text += "[b]-- Economy / Wallet Ledger --[/b]\n"
	var ledger = h.get("wallet_ledger", [])
	if ledger.is_empty():
		text += "No transactions found.\n"
	else:
		for item in ledger:
			var changeset = str(item.get("changeset", {}))
			var c_time = item.get("create_time", "")
			text += "- [%s] %s\n" % [c_time.left(19).replace("T", " "), changeset]
			
	text += "\n"
	
	# Matches
	text += "[b]-- Matches --[/b]\n"
	var matches = h.get("matches", [])
	if matches.is_empty():
		text += "No match history found.\n"
	else:
		for m in matches:
			text += "- " + str(m) + "\n"
			
	history_text.text = text
	history_dialog.popup_centered()

func _on_delete() -> void:
	var users := _get_checked_user_data()
	if users.is_empty(): return
	var ids := []; var names := []
	for u in users:
		if u.get("role", "") in ["admin", "owner"]: continue
		ids.append(u.user_id); names.append(u.username)
	if ids.is_empty(): return
	var dialog := ConfirmationDialog.new()
	dialog.title = "DELETE %d account(s)" % ids.size()
	var vbox := VBoxContainer.new(); vbox.add_theme_constant_override("separation", 12)
	var list_names = []; for i in range(min(names.size(), 10)): list_names.append(names[i])
	var name_str = ", ".join(list_names); if names.size() > 10: name_str += "... and %d others" % (names.size() - 10)
	var text_lbl = Label.new(); text_lbl.text = "PERMANENTLY DELETE:\n" + name_str + "\n\nThis CANNOT be undone!"; text_lbl.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART; text_lbl.custom_minimum_size = Vector2(400, 0)
	vbox.add_child(text_lbl); dialog.add_child(vbox); add_child(dialog); dialog.popup_centered()
	dialog.confirmed.connect(func():
		var r := await _rpc("admin_delete_users", {"user_ids": ids})
		_set_status("Deleted %d accounts" % r.get("deleted", []).size(), CLR_STATUS_OK)
		await _load_users()
		dialog.queue_free()
	)

# =============================================================================
# TAB 2: LEADERBOARD MANAGEMENT
# =============================================================================
func _load_leaderboard() -> void:
	_clear_tree(lb_tree, _lb_root)
	_set_status("Loading leaderboards...")
	
	var res := await _rpc("get_leaderboard_stats", {})
	if res.has("error"):
		_set_status("Failed to load scores", CLR_STATUS_ERR)
		return
		
	var raw_lb = res.get("leaderboard", [])
	lb_data = raw_lb if typeof(raw_lb) == TYPE_ARRAY else []
	count_label.text = "%d records" % lb_data.size()
	lb_data.sort_custom(func(a, b): return a.get("high_score", 0) > b.get("high_score", 0))
	
	var rank = 1
	for entry in lb_data:
		var item := _lb_root.create_child()
		item.set_text(0, "#%d" % rank)
		item.set_text(1, entry.get("display_name", "Unknown"))
		item.set_text(2, str(entry.get("high_score", 0)))
		item.set_text(3, str(entry.get("games_won", 0)))
		item.set_text(4, str(entry.get("games_played", 0)))
		item.add_button(5, _get_edit_icon(), 0, false, "Edit Score")
		item.set_metadata(0, entry)
		rank += 1
	_set_status("")

func _on_lb_tree_button_clicked(item: TreeItem, _col: int, _id: int, _mouse: int) -> void:
	_show_edit_score_dialog(item.get_metadata(0))

func _show_edit_score_dialog(entry: Dictionary) -> void:
	var uid: String = entry.get("user_id", "")
	var name: String = entry.get("display_name", "Unknown")
	var dialog := AcceptDialog.new(); dialog.title = "Edit Score: " + name; dialog.min_size = Vector2i(350, 280)
	var vbox := VBoxContainer.new(); vbox.add_theme_constant_override("separation", 10)
	var info_lbl := Label.new(); info_lbl.text = "Manage player stats for: " + name; info_lbl.add_theme_color_override("font_color", CLR_HEADER); vbox.add_child(info_lbl)
	var grid := GridContainer.new(); grid.columns = 2
	var fields = {"high_score": SpinBox.new(), "games_won": SpinBox.new(), "games_played": SpinBox.new()}
	for key in fields:
		var lbl = Label.new()
		lbl.text = key.capitalize() + ":"
		grid.add_child(lbl)
		var spin = fields[key] as SpinBox; spin.max_value = 1000000; spin.value = entry.get(key, 0); spin.custom_minimum_size.x = 120; grid.add_child(spin)
	vbox.add_child(grid); var btn_vbox = VBoxContainer.new(); btn_vbox.add_theme_constant_override("separation", 5)
	var save_btn = Button.new(); save_btn.text = "UPDATE SCORE"; save_btn.custom_minimum_size.y = 40; btn_vbox.add_child(save_btn)
	var reset_btn = Button.new(); reset_btn.text = "RESET / DELETE RECORD"; reset_btn.add_theme_color_override("font_color", CLR_BTN_DEL); btn_vbox.add_child(reset_btn)
	vbox.add_child(btn_vbox); dialog.add_child(vbox); add_child(dialog); dialog.popup_centered()
	save_btn.pressed.connect(func():
		var stats = {}; for k in fields: stats[k] = int(fields[k].value)
		await _save_score_edit(uid, stats); dialog.queue_free()
	)
	reset_btn.pressed.connect(func(): _confirm_reset_score(uid, name); dialog.queue_free())

func _confirm_reset_score(uid: String, name: String) -> void:
	var confirm := ConfirmationDialog.new(); confirm.title = "Reset Score?"; confirm.dialog_text = "Are you sure?"
	add_child(confirm); confirm.popup_centered(); confirm.confirmed.connect(func():
		var res := await _rpc("admin_delete_stats", {"user_id": uid})
		if res.has("success"): await _load_leaderboard()
	)

func _save_score_edit(uid: String, stats: Dictionary) -> void:
	_set_status("Updating score...")
	var res := await _rpc("admin_update_stats", {"user_id": uid, "stats": stats})
	if res.has("success"): _set_status("Updated", CLR_STATUS_OK); await _load_leaderboard()

func _on_sync_leaderboard() -> void:
	_set_status("Syncing all records to native leaderboard...", CLR_HEADER)
	var res := await _rpc("admin_sync_leaderboard", {})
	if res.has("success"):
		var count = res.get("synced", 0)
		_set_status("Successfully synced %d records!" % count, CLR_STATUS_OK)
		await _load_leaderboard()
	else:
		_set_status("Sync failed: " + str(res.get("error", "Unknown")), CLR_STATUS_ERR)

# =============================================================================
# Common Helpers
# =============================================================================
func _clear_tree(tree: Tree, root: TreeItem) -> void:
	if root:
		var child := root.get_first_child()
		while child:
			var next := child.get_next()
			root.remove_child(child)
			child = next

func _get_edit_icon() -> Texture2D:
	var img := Image.create(16, 16, false, Image.FORMAT_RGBA8)
	img.fill(Color(0, 0, 0, 0))
	for i in range(4, 12):
		img.set_pixel(i, 11 - i + 4, CLR_TEXT)
		img.set_pixel(i, 12 - i + 4, CLR_TEXT)
	return ImageTexture.create_from_image(img)

# =============================================================================
# TAB 3: DAILY REWARDS
# =============================================================================
func _load_daily_rewards_config() -> void:
	_set_status("Loading Daily Rewards Config...")
	var res := await _rpc("get_daily_reward_config_admin", {})
	if res.has("error"):
		_set_status("Failed to load DR config", CLR_STATUS_ERR)
		return
		
	var config = res.get("config", {})
	if config.is_empty():
		for m in range(1, 13):
			var m_str = "%02d" % m
			var arr = []
			for d in range(30):
				arr.append({"type": "star", "amount": min(10 + d*5, 100)})
			config[m_str] = arr
			
	_daily_reward_config_data = config
	
	month_option_btn.clear()
	for i in range(1, 13):
		month_option_btn.add_item(MONTH_NAMES[i - 1])
		month_option_btn.set_item_metadata(i - 1, "%02d" % i)
		
	if not _daily_reward_config_data.is_empty():
		_current_dr_month = "01"
		month_option_btn.select(0)
		_build_dr_grid()
		
	_set_status("Config Loaded", CLR_STATUS_OK)

func _on_dr_month_selected(index: int) -> void:
	# Save current grid values into the dictionary before switching
	_save_current_grid_to_dict()
	
	_current_dr_month = month_option_btn.get_item_metadata(index)
	_build_dr_grid()

func _save_current_grid_to_dict() -> void:
	if _current_dr_month.is_empty(): return
	var arr = []
	for child in days_grid.get_children():
		if child != day_config_template:
			var opt = child.get_node("Margin/VBox/TypeOptionBtn") as OptionButton
			var spin = child.get_node("Margin/VBox/AmountSpinBox") as SpinBox
			var item_type = opt.get_item_text(opt.selected) if opt.selected >= 0 else "star"
			arr.append({"type": item_type, "amount": int(spin.value)})
	if not arr.is_empty():
		_daily_reward_config_data[_current_dr_month] = arr

func _build_dr_grid() -> void:
	for child in days_grid.get_children():
		if child != day_config_template:
			child.queue_free()
			
	var arr = _daily_reward_config_data.get(_current_dr_month, [])
	for i in range(arr.size()):
		var slot = day_config_template.duplicate()
		slot.visible = true
		days_grid.add_child(slot)
		
		var lbl = slot.get_node("Margin/VBox/DayLabel") as Label
		var opt = slot.get_node("Margin/VBox/TypeOptionBtn") as OptionButton
		var spin = slot.get_node("Margin/VBox/AmountSpinBox") as SpinBox
		
		lbl.text = "Day " + str(i + 1)
		var rdata = arr[i]
		if typeof(rdata) == TYPE_DICTIONARY:
			spin.value = rdata.get("amount", 0)
			var type_str = rdata.get("type", "star")
			var found = false
			for j in range(opt.item_count):
				if opt.get_item_text(j) == type_str:
					opt.select(j)
					found = true
					break
			if not found:
				opt.add_item(type_str)
				opt.select(opt.item_count - 1)
		else:
			# Fallback for old int format
			spin.value = int(rdata)
			opt.select(0)

func _save_daily_rewards_config() -> void:
	_save_current_grid_to_dict()
	_set_status("Saving config...")
	var req = { "config": _daily_reward_config_data }
	var res = await _rpc("set_daily_reward_config", req)
	if res.has("error"):
		_set_status("Save failed: " + res.get("error"), CLR_STATUS_ERR)
	else:
		_set_status("Config saved successfully!", CLR_STATUS_OK)

# =============================================================================
# TAB 4: ANNOUNCEMENTS
# =============================================================================
func _on_add_reward_pressed() -> void:
	var row = reward_row_template.duplicate()
	row.visible = true
	rewards_list.add_child(row)
	var remove_btn = row.get_node("RemoveBtn") as Button
	remove_btn.pressed.connect(func(): row.queue_free())

func _on_find_user() -> void:
	var input = target_user_edit.text.strip_edges()
	if input.is_empty():
		_resolved_user_id = ""
		resolved_id_label.text = "(Global — all users)"
		return
	
	_set_status("Looking up user...")
	var uid = await _resolve_target_user_id(input)
	if uid.is_empty():
		resolved_id_label.text = "NOT FOUND"
		resolved_id_label.add_theme_color_override("font_color", CLR_STATUS_ERR)
		_set_status("User not found: " + input, CLR_STATUS_ERR)
	else:
		_resolved_user_id = uid
		resolved_id_label.text = "ID: " + uid.substr(0, 12) + "..."
		resolved_id_label.add_theme_color_override("font_color", CLR_STATUS_OK)
		_set_status("Found user: " + uid, CLR_STATUS_OK)

func _resolve_target_user_id(input: String) -> String:
	"""Resolve a username, display_name, or user_id to a user_id.
	Returns empty string if not found."""
	if input.is_empty():
		return ""
	
	# If it looks like a UUID already, return as-is
	if input.length() >= 32 and "-" in input:
		return input
	
	# Search in cached all_users first
	for u in all_users:
		var uname: String = u.get("username", "")
		var dname: String = u.get("display_name", "")
		var uid: String = u.get("user_id", "")
		if uname.to_lower() == input.to_lower() or dname.to_lower() == input.to_lower():
			return uid
	
	# Cache miss — fetch from server
	var res := await _rpc("admin_list_users", {})
	if res.has("error"):
		return ""
	all_users = res.get("users", [])
	
	for u in all_users:
		var uname: String = u.get("username", "")
		var dname: String = u.get("display_name", "")
		var uid: String = u.get("user_id", "")
		if uname.to_lower() == input.to_lower() or dname.to_lower() == input.to_lower():
			return uid
	
	return ""

func _on_send_mail() -> void:
	var input = target_user_edit.text.strip_edges()
	var title = title_edit.text.strip_edges()
	var content = content_edit.text.strip_edges()
	var start_date = start_date_edit.get_date_iso()
	var end_date = end_date_edit.get_date_iso()
	
	if title.is_empty() or content.is_empty():
		_set_status("Title and content cannot be empty", CLR_STATUS_ERR)
		return
	
	# Resolve target
	var target_uid := ""
	if not input.is_empty():
		if not _resolved_user_id.is_empty():
			target_uid = _resolved_user_id
		else:
			_set_status("Resolving user...")
			target_uid = await _resolve_target_user_id(input)
			if target_uid.is_empty():
				_set_status("User not found: " + input + ". Use Find button.", CLR_STATUS_ERR)
				return
			_resolved_user_id = target_uid
			resolved_id_label.text = "ID: " + target_uid.substr(0, 12) + "..."
			resolved_id_label.add_theme_color_override("font_color", CLR_STATUS_OK)
		
	var rewards_arr = []
	for child in rewards_list.get_children():
		if not child.visible: continue # skip template
		var type_opt = child.get_node("TypeOption") as OptionButton
		var id_edit = child.get_node("IdEdit") as LineEdit
		var amount_spin = child.get_node("AmountSpin") as SpinBox
		
		var type_str = type_opt.get_item_text(type_opt.selected)
		var r_id = id_edit.text.strip_edges()
		rewards_arr.append({
			"type": type_str,
			"id": r_id,
			"amount": int(amount_spin.value)
		})
		
	send_mail_btn.disabled = true
	_set_status("Sending mail...")
	
	var payload = {
		"target_user_id": target_uid,
		"title": title,
		"content": content,
		"start_date": start_date,
		"end_date": end_date,
		"rewards": rewards_arr
	}
	
	var res = await _rpc("admin_send_mail", payload)
	send_mail_btn.disabled = false
	
	if res.has("error"):
		_set_status("Failed to send mail: " + res.get("error", "Unknown"), CLR_STATUS_ERR)
	else:
		_set_status("Mail sent successfully!", CLR_STATUS_OK)
		target_user_edit.text = ""
		_resolved_user_id = ""
		resolved_id_label.text = ""
		title_edit.text = ""
		content_edit.text = ""
		if start_date_edit.has_method("clear_date"):
			start_date_edit.clear_date()
		if end_date_edit.has_method("clear_date"):
			end_date_edit.clear_date()
		for child in rewards_list.get_children():
			if child.visible: child.queue_free()

# =============================================================================
# TAB 5: MAIL MANAGER
# =============================================================================
func _load_mail() -> void:
	_clear_tree(mail_tree, _mail_root)
	_set_status("Loading mails...")
	
	var res := await _rpc("admin_list_mail", {})
	if res.has("error"):
		_set_status("Failed: " + str(res.error), CLR_STATUS_ERR)
		return
	
	var raw_mails = res.get("mails", [])
	_all_server_mails = raw_mails if typeof(raw_mails) == TYPE_ARRAY else []
	count_label.text = "%d mails" % _all_server_mails.size()
	
	var now_str = Time.get_datetime_string_from_system(true)
	
	for mail in _all_server_mails:
		var item := _mail_root.create_child()
		var mail_type: String = mail.get("type", "global")
		var mail_title: String = mail.get("title", "No Title")
		var sender: String = mail.get("sender", "SYSTEM")
		var start_date: String = mail.get("start_date", "")
		var expiry: String = mail.get("expiry_date", "")
		
		# Type column
		item.set_text(0, mail_type.to_upper())
		if mail_type == "personal":
			item.set_custom_color(0, CLR_ADMIN)
		else:
			item.set_custom_color(0, CLR_MOD)
		
		# Title
		item.set_text(1, mail_title)
		
		# Sender
		item.set_text(2, sender)
		
		# Start date
		item.set_text(3, start_date.substr(0, 10) if start_date.length() >= 10 else start_date)
		
		# Expiry
		var expiry_short = expiry.substr(0, 10) if expiry.length() >= 10 else expiry
		item.set_text(4, expiry_short)
		
		# Status
		var end_date: String = mail.get("end_date", "")
		var status := "ACTIVE"
		if not end_date.is_empty() and now_str > end_date:
			status = "ENDED"
			item.set_custom_color(5, CLR_BTN_DEL)
		elif not expiry.is_empty() and now_str > expiry:
			status = "EXPIRED"
			item.set_custom_color(5, CLR_BTN_DEL)
		else:
			item.set_custom_color(5, CLR_STATUS_OK)
		item.set_text(5, status)
		
		item.set_metadata(0, mail)
	
	_update_mail_action_btns(null)
	_set_status("")

func _on_mail_item_selected() -> void:
	var item = mail_tree.get_selected()
	_update_mail_action_btns(item)

func _update_mail_action_btns(item) -> void:
	var has_sel = item != null
	edit_mail_btn.disabled = not has_sel
	end_mail_btn.disabled = not has_sel
	delete_mail_server_btn.disabled = not has_sel

func _get_selected_mail() -> Dictionary:
	var item = mail_tree.get_selected()
	if item:
		return item.get_metadata(0)
	return {}

func _on_edit_mail_pressed() -> void:
	var mail = _get_selected_mail()
	if mail.is_empty(): return
	_show_edit_mail_dialog(mail)

func _show_edit_mail_dialog(mail: Dictionary) -> void:
	var mail_id: String = mail.get("id", "")
	var mail_type: String = mail.get("type", "global")
	var target_uid: String = mail.get("target_user_id", "")
	
	var dialog := AcceptDialog.new()
	dialog.title = "Edit Mail: " + mail.get("title", "")
	dialog.min_size = Vector2i(480, 360)
	var vbox := VBoxContainer.new()
	vbox.add_theme_constant_override("separation", 10)
	
	var id_lbl := Label.new()
	id_lbl.text = "ID: " + mail_id + " | Type: " + mail_type
	id_lbl.add_theme_color_override("font_color", CLR_DIM)
	vbox.add_child(id_lbl)
	
	var grid := GridContainer.new()
	grid.columns = 2
	grid.add_theme_constant_override("h_separation", 8)
	grid.add_theme_constant_override("v_separation", 8)
	
	var title_lbl := Label.new(); title_lbl.text = "Title:"; grid.add_child(title_lbl)
	var title_input := LineEdit.new(); title_input.text = mail.get("title", ""); title_input.custom_minimum_size.x = 300; grid.add_child(title_input)
	
	var content_lbl := Label.new(); content_lbl.text = "Content:"; grid.add_child(content_lbl)
	var content_input := TextEdit.new(); content_input.text = mail.get("content", ""); content_input.custom_minimum_size = Vector2(300, 100); grid.add_child(content_input)
	
	var end_lbl := Label.new(); end_lbl.text = "End Date:"; grid.add_child(end_lbl)
	var end_picker: Button = load("res://scenes/ui/date_picker.tscn").instantiate()
	end_picker.custom_minimum_size.x = 200
	grid.add_child(end_picker)
	# Pre-populate if existing end_date
	var existing_end: String = mail.get("end_date", "")
	if not existing_end.is_empty():
		var parts = existing_end.substr(0, 10).split("-")
		if parts.size() == 3:
			end_picker.current_date = {"year": int(parts[0]), "month": int(parts[1]), "day": int(parts[2])}
			end_picker.view_date = end_picker.current_date.duplicate()
			end_picker.text = existing_end.substr(0, 10)
	
	# Recipient row
	var recip_lbl := Label.new(); recip_lbl.text = "Recipient:"; grid.add_child(recip_lbl)
	var recip_hbox := HBoxContainer.new()
	recip_hbox.add_theme_constant_override("separation", 6)
	var recip_input := LineEdit.new()
	recip_input.custom_minimum_size.x = 180
	recip_input.placeholder_text = "Username or ID (empty = global)"
	if mail_type == "personal" and not target_uid.is_empty():
		recip_input.text = target_uid.substr(0, 12) + "..."
		recip_input.tooltip_text = target_uid
	recip_hbox.add_child(recip_input)
	var recip_find_btn := Button.new()
	recip_find_btn.text = "Find"
	recip_find_btn.custom_minimum_size.x = 60
	recip_hbox.add_child(recip_find_btn)
	var recip_resolved_lbl := Label.new()
	recip_resolved_lbl.add_theme_color_override("font_color", CLR_STATUS_OK)
	recip_hbox.add_child(recip_resolved_lbl)
	grid.add_child(recip_hbox)
	
	var _edit_resolved_uid := target_uid
	recip_find_btn.pressed.connect(func():
		var inp = recip_input.text.strip_edges()
		if inp.is_empty():
			_edit_resolved_uid = ""
			recip_resolved_lbl.text = "(Global)"
			recip_resolved_lbl.add_theme_color_override("font_color", CLR_STATUS_OK)
			return
		var uid = await _resolve_target_user_id(inp)
		if uid.is_empty():
			recip_resolved_lbl.text = "NOT FOUND"
			recip_resolved_lbl.add_theme_color_override("font_color", CLR_STATUS_ERR)
		else:
			_edit_resolved_uid = uid
			recip_resolved_lbl.text = uid.substr(0, 12) + "..."
			recip_resolved_lbl.add_theme_color_override("font_color", CLR_STATUS_OK)
	)
	
	vbox.add_child(grid)
	
	var save_btn := Button.new()
	save_btn.text = "Save Changes"
	save_btn.custom_minimum_size.y = 40
	vbox.add_child(save_btn)
	
	dialog.add_child(vbox)
	add_child(dialog)
	dialog.popup_centered()
	
	save_btn.pressed.connect(func():
		# If user typed something but didn't click Find, auto-resolve
		var recip_text = recip_input.text.strip_edges()
		var final_target = _edit_resolved_uid
		if not recip_text.is_empty() and _edit_resolved_uid == target_uid:
			# Text changed but not resolved yet
			var resolved = await _resolve_target_user_id(recip_text)
			if not resolved.is_empty():
				final_target = resolved
		elif recip_text.is_empty():
			final_target = ""
		
		_set_status("Updating mail...")
		var payload = {
			"mail_id": mail_id,
			"type": mail_type,
			"target_user_id": target_uid,
			"new_target_user_id": final_target,
			"title": title_input.text,
			"content": content_input.text,
			"end_date": end_picker.get_date_iso()
		}
		var res = await _rpc("admin_update_mail", payload)
		if res.has("success"):
			_set_status("Mail updated!", CLR_STATUS_OK)
			await _load_mail()
		dialog.queue_free()
	)

func _on_end_mail_pressed() -> void:
	var mail = _get_selected_mail()
	if mail.is_empty(): return
	
	var mail_id: String = mail.get("id", "")
	var mail_type: String = mail.get("type", "global")
	var target_uid: String = mail.get("target_user_id", "")
	
	var confirm := ConfirmationDialog.new()
	confirm.title = "End Mail Now?"
	confirm.dialog_text = "Set end_date to NOW for:\n" + mail.get("title", "Unknown")
	add_child(confirm)
	confirm.popup_centered()
	confirm.confirmed.connect(func():
		var now_iso = Time.get_datetime_string_from_system(true)
		var res = await _rpc("admin_update_mail", {
			"mail_id": mail_id,
			"type": mail_type,
			"target_user_id": target_uid,
			"end_date": now_iso
		})
		if res.has("success"):
			_set_status("Mail ended", CLR_STATUS_OK)
			await _load_mail()
		confirm.queue_free()
	)

func _on_delete_mail_server_pressed() -> void:
	var mail = _get_selected_mail()
	if mail.is_empty(): return
	
	var mail_id: String = mail.get("id", "")
	var mail_type: String = mail.get("type", "global")
	var target_uid: String = mail.get("target_user_id", "")
	
	var confirm := ConfirmationDialog.new()
	confirm.title = "PERMANENTLY Delete Mail?"
	confirm.dialog_text = "Remove from server storage:\n" + mail.get("title", "Unknown") + "\n\nThis cannot be undone!"
	add_child(confirm)
	confirm.popup_centered()
	confirm.confirmed.connect(func():
		var res = await _rpc("admin_delete_mail_server", {
			"mail_id": mail_id,
			"type": mail_type,
			"target_user_id": target_uid
		})
		if res.has("success"):
			_set_status("Mail deleted from server", CLR_STATUS_OK)
			await _load_mail()
		confirm.queue_free()
	)

# =============================================================================
# TAB 6: SHOP — FEATURED BANNERS
# =============================================================================
var _slot_nodes: Array = []  # cached references to the 3 slot HBoxContainers

func _get_slot_nodes() -> Array:
	if _slot_nodes.is_empty():
		for child in slots_vbox.get_children():
			if child is HBoxContainer:
				_slot_nodes.append(child)
	return _slot_nodes

func _load_featured_banners() -> void:
	_set_status("Loading banners...")
	var res := await _rpc("admin_get_featured_banners", {})
	if res.has("error"):
		_set_status("Failed: " + str(res.error), CLR_STATUS_ERR)
		return

	var raw_banners = res.get("banners", [])
	var banners: Array = raw_banners if typeof(raw_banners) == TYPE_ARRAY else []
	var slots := _get_slot_nodes()

	for i in range(slots.size()):
		var slot: HBoxContainer = slots[i]
		var id_edit: LineEdit = slot.get_node("ItemIdEdit") as LineEdit
		var lbl_edit: LineEdit = slot.get_node("LabelEdit") as LineEdit
		if i < banners.size():
			var b: Dictionary = banners[i] if banners[i] is Dictionary else {}
			id_edit.text = b.get("item_id", "")
			lbl_edit.text = b.get("label", "")
		else:
			id_edit.text = ""
			lbl_edit.text = ""

	count_label.text = "%d banners configured" % banners.size()
	_set_status("Banners loaded", CLR_STATUS_OK)

func _save_featured_banners() -> void:
	var banners: Array = []
	var slots := _get_slot_nodes()

	for slot in slots:
		var id_edit: LineEdit = slot.get_node("ItemIdEdit") as LineEdit
		var lbl_edit: LineEdit = slot.get_node("LabelEdit") as LineEdit
		var item_id: String = id_edit.text.strip_edges()
		var label: String = lbl_edit.text.strip_edges()
		if not item_id.is_empty():
			banners.append({"item_id": item_id, "label": label})

	_set_status("Saving banners...")
	var res := await _rpc("admin_set_featured_banners", {"banners": banners})
	if res.has("error"):
		_set_status("Save failed: " + str(res.error), CLR_STATUS_ERR)
	elif res.has("success"):
		_set_status("Banners saved! (%d slots)" % banners.size(), CLR_STATUS_OK)