<?php
/**
 * AKSRT User Center —本人中心协调类
 *
 * 负责本人中心页面的初始化、面板注册和资源加载协调。
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

class AKSRT_User_Center {

    private static $instance = null;

    /** @var array 面板注册表 */
    private $panels = [];

    private function __construct() {}

    public static function get_instance(): self {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public function init(): void {
        $this->register_default_panels();
    }

    /**
     * 注册默认面板
     */
    private function register_default_panels(): void {
        $settings = class_exists('AKSRT_Settings')
            ? AKSRT_Settings::get_user_center_settings()
            : [
                'tabs'          => ['profile', 'posts', 'comments', 'favorites'],
                'avatar_upload' => true,
                'cover_upload'  => true,
                'social_links'  => true,
            ];

        $definitions = [
            'profile' => [
                'label'    => __('个人信息', 'aksrt'),
                'icon'     => 'user',
                'priority' => 10,
                'type'     => 'panel',
            ],
            'posts' => [
                'label'    => __('我的文章', 'aksrt'),
                'icon'     => 'file-alt',
                'priority' => 20,
                'type'     => 'panel',
            ],
            'comments' => [
                'label'    => __('我的评论', 'aksrt'),
                'icon'     => 'comment',
                'priority' => 30,
                'type'     => 'panel',
            ],
            'favorites' => [
                'label'    => __('我的收藏', 'aksrt'),
                'icon'     => 'star',
                'priority' => 40,
                'type'     => 'panel',
            ],
            'credits' => [
                'label'    => class_exists('AKSRT_Settings')
                    ? sprintf(__('我的%s', 'aksrt'), AKSRT_Settings::get_currency_name())
                    : __('我的积分', 'aksrt'),
                'icon'     => 'wallet',
                'priority' => 50,
                'type'     => 'panel',
            ],
            'notif' => [
                'label'    => __('消息通知', 'aksrt'),
                'icon'     => 'bell',
                'priority' => 60,
                'type'     => 'link',
            ],
            'settings' => [
                'label'    => __('账号设置', 'aksrt'),
                'icon'     => 'cog',
                'priority' => 70,
                'type'     => 'panel',
            ],
        ];

        $this->panels = [];

        foreach ((array) ($settings['tabs'] ?? []) as $key) {
            if ($key === 'credits') {
                $credits_on = class_exists('AKSRT_Settings') && AKSRT_Settings::credits_enabled();
                $balance_on = class_exists('AKSRT_Balance') && AKSRT_Balance::enabled();
                if (!$credits_on && !$balance_on) {
                    continue;
                }
                if ($balance_on) {
                    $definitions['credits']['label'] = __('我的资产', 'aksrt');
                    $definitions['credits']['icon']  = 'wallet';
                }
            }

            if (isset($definitions[$key])) {
                $this->panels[$key] = $definitions[$key];
            }
        }

        // Ensure assets panel when wallet and/or credits enabled (even if tabs list omitted credits).
        $credits_on = class_exists('AKSRT_Settings') && AKSRT_Settings::credits_enabled();
        $balance_on = class_exists('AKSRT_Balance') && AKSRT_Balance::enabled();
        if (!isset($this->panels['credits']) && ($credits_on || $balance_on)) {
            $panel = $definitions['credits'];
            if ($balance_on) {
                $panel['label'] = __('我的资产', 'aksrt');
                $panel['icon']  = 'wallet';
            }
            $this->panels['credits'] = $panel;
        }

        if (!isset($this->panels['settings'])) {
            $this->panels['settings'] = $definitions['settings'];
        }

        $this->panels['notif'] = $definitions['notif'];

        /**
         * 允许插件/子主题注册额外面板
         *
         * @param array $panels 面板注册表
         */
        $this->panels = apply_filters('aksrt_user_center_panels', $this->panels);
    }

    /**
     * 获取面板注册表
     */
    public function get_panels(): array {
        return $this->panels;
    }

    /**
     * 获取可切换的本地面板（不含外链入口）。
     */
    public function get_dashboard_tabs(): array {
        return array_filter($this->panels, static function (array $panel): bool {
            return ($panel['type'] ?? 'panel') === 'panel';
        });
    }

    /**
     * 判断当前页面是否为本人中心
     */
    public static function is_page(): bool {
        return function_exists('aksrt_is_user_center_page') && aksrt_is_user_center_page();
    }
}