<?php

declare(strict_types=1);

namespace app\index\controller\Article;

use app\index\BaseController;
use Symfony\Component\VarDumper\VarDumper;
use think\exception\ValidateException;
use think\facade\Request;
use think\facade\Session;
use think\response\Json;
use think\db\exception\DbException;

use app\model\Cms\Articles;
use app\model\Cms\ArticlesCategory;
use tidy;

class NewsCenterController extends BaseController
{
    /**
     * 根据域名获取新闻数据
     *
     * 返回字段：list 列表；total 当前租户下已发布新闻总数；count 当前筛选（全部或 cate）下的条数，翻页按 count 与 page_size。
     *
     * @return Json
     */
    public function getCenterNews(): Json
    {
        $baseUrl = (string) $this->request->param('baseUrl', '');

        if ($baseUrl !== '') {
            $this->tenantId = BaseController::getTenantIdByDomain($baseUrl);
        }
        
        $tid = $this->getTenantId();

        if (empty($tid)) {
            return json([
                'code' => 400,
                'msg' => '无法识别租户信息',
                'list' => [],
            ]);
        }

        // param 合并 GET，避免个别环境下仅 get 取不到查询串
        $cateId = (int) $this->request->param('cate', 0);
        $listPage = (int) $this->request->param('page', 0);
        $pageSizeReq = (int) $this->request->param('page_size', 0);

        // 点击左侧分类：文章 cate 可能挂在子分类上，需包含「该分类 + 其下所有子分类」id
        $categoryIdsForFilter = [];
        if ($cateId > 0) {
            $categoryIdsForFilter = $this->resolveCategoryBranchIds($cateId, $tid);
            if ($categoryIdsForFilter === []) {
                $categoryIdsForFilter = [$cateId];
            }
        }

        $baseQuery = static function () use ($tid, $cateId, $categoryIdsForFilter) {
            $q = Articles::published()
                ->where('tid', $tid)
                ->where('delete_time', null);
            if ($cateId > 0 && $categoryIdsForFilter !== []) {
                $q->whereIn('cate', $categoryIdsForFilter);
            }

            return $q;
        };

        // 当前租户下「全部」已发布新闻数（不受 cate 筛选影响）
        $totalTenantNews = (int) Articles::published()
            ->where('tid', $tid)
            ->where('delete_time', null)
            ->count();

        // 当前列表条件下的总数：tid +（可选）cate，用于翻页总页数 = ceil(count / page_size)
        $countFiltered = (int) $baseQuery()->count();

        $useListPagination = $listPage > 0 && $pageSizeReq > 0;

        if ($useListPagination) {
            // 新闻中心列表页：服务端分页；不要用查询参数名 page，避免与路由占位符冲突
            $pageSizeReq = max(1, min($pageSizeReq, 50));
            $listPage = max(1, $listPage);
            $articles = $baseQuery()
                ->order('publish_date', 'desc')
                ->page($listPage, $pageSizeReq)
                ->select();
        } else {
            // 首页等：按 limit 取前 N 条（默认 8）
            $limit = (int) $this->request->param('limit', 8);
            if ($limit < 1) {
                $limit = 8;
            }
            if ($limit > 200) {
                $limit = 200;
            }

            $articles = $baseQuery()
                ->order('publish_date', 'desc')
                ->limit($limit)
                ->select();
        }

        // 处理图片：如果文章 image 为空，则取分类的 image
        foreach ($articles as &$article) {
            if (empty($article['image']) && !empty($article['cate'])) {
                $category = ArticlesCategory::where('id', $article['cate'])
                    ->where('delete_time', null)
                    ->find();
                if ($category && !empty($category['image'])) {
                    $article['image'] = $category['image'];
                }
            }
        }
        unset($article);

        return json([
            'code'  => 200,
            'msg'   => 'success',
            'list'  => $articles,
            // 当前租户下新闻总条数（全部状态为已发布）
            'total' => $totalTenantNews,
            // 当前筛选（全部或某分类）下的条数，列表翻页按 count 与 page_size 计算
            'count' => $countFiltered,
        ]);
    }

    /**
     * 解析分类筛选用的 id 列表：自身 + mete_articles_category 中 cid=该 id 的所有子孙（同 tid、未删除）
     */
    private function resolveCategoryBranchIds(int $rootId, int $tid): array
    {
        if ($rootId <= 0 || $tid <= 0) {
            return [];
        }

        $root = ArticlesCategory::where('id', $rootId)
            ->where('tid', $tid)
            ->where('delete_time', null)
            ->find();
        if (!$root) {
            return [$rootId];
        }

        $ids = [$rootId];
        $queue = [$rootId];
        while ($queue !== []) {
            $pid = array_shift($queue);
            $children = ArticlesCategory::where('cid', $pid)
                ->where('tid', $tid)
                ->where('delete_time', null)
                ->column('id');
            foreach ($children as $id) {
                $id = (int) $id;
                if ($id > 0 && !in_array($id, $ids, true)) {
                    $ids[] = $id;
                    $queue[] = $id;
                }
            }
        }

        return $ids;
    }

    /**
     * 获取新闻详情
     * @param int $id 文章ID
     * @return Json
     */
    public function getNewsDetail(int $id): Json
    {
        try {
            $baseUrl = $this->request->get('baseUrl', '');
            if (!empty($baseUrl)) {
                $this->tenantId = BaseController::getTenantIdByDomain($baseUrl);
            }

            $tid = $this->getTenantId();
            $query = Articles::published()->where('id', $id);
            if ($tid > 0) {
                $query->where('tid', $tid);
            }
            $article = $query->find();
            if (!$article) {
                return json([
                    'code' => 404,
                    'msg' => '文章不存在',
                    'list' => [],
                ]);
            }
            return json([
                'code' => 200,
                'msg' => 'success',
                'list' => $article,
            ]);
        } catch (\Exception $e) {
            return json([
                'code' => 500,
                'msg' => '获取新闻详情失败：' . $e->getMessage(),
                'list' => [],
            ]);
        }
    }

    /**
     * 获取上一篇下一篇
     * @param int $id 文章ID
     * @param int $cate 分类ID
     * @return array
     */
    private function getNextPreviousArticles(int $id, int $cate): array
    {
        $nextArticle = Articles::where('id', '<', $id)
            ->where('cate', $cate)
            ->where('delete_time', null)
            ->where('status', 2)
            ->field('id,title')
            ->find();

        $previousArticle = Articles::where('id', '>', $id)
            ->where('cate', $cate)
            ->where('delete_time', null)
            ->where('status', 2)
            ->field('id,title')
            ->find();

        return [
            'code' => 200,
            'msg' => 'success',
            'next' => $nextArticle,
            'previous' => $previousArticle,
        ];
    }

    /**
     * 通过分类 ID 获取分类名称
     * @param int $cateId 分类ID
     * @return string
     */
    private function getCategoryName(int $id): string
    {
        $categoryInfo = ArticlesCategory::where('id', $id)
            ->where('delete_time', null)
            ->find();

        if (!$categoryInfo) {
            return '未分类';
        }

        return $categoryInfo['name'];
    }

    /**
     * 获取相关文章
     */
    private function getRelatedArticles(int $id, int $cate): array
    {
        $articles = Articles::where('id', '<>', $id)
            ->where('cate', $cate)
            ->where('delete_time', null)
            ->where('status', 2)
            ->order('top', 'desc')
            ->order('recommend', 'desc')
            ->order('sort', 'desc')
            ->order('id', 'desc')
            ->limit(5)
            ->select();

        foreach ($articles as &$article) {
            $article['cate'] = $this->getCategoryName($article['cate']);
        }

        return [
            'code' => 200,
            'msg' => 'success',
            'list' => $articles,
        ];
    }

}