<?php

namespace App\Service;

use App\BaseApp\BaseService;
use App\Models\MenuModel;
use Exception;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\NotFoundExceptionInterface;

/**
 * 菜单服务：列表树、搜索（含子菜单）、下拉
 */
class MenuService extends BaseService
{
    public function __construct()
    {
        parent::__construct();
        $this->model = MenuModel::class;
        $this->selectField = [
            'id', 'pid', 'title', 'icon', 'name', 'affix_tab', 'path', 'component', 'redirect', 'keep_alive', 'hide_in_menu', 'badge', 'badge_type', 'badge_variants', 'iframe_src', 'sort', 'query', 'created_at'
        ];
        $this->queryField = [ 'title' => 'like', 'pid' => '=' ];
        $this->optionField = ['id', 'title'];
        $this->orderBy = [
            'name' => 'sort',
            'sort' => 'asc'
        ];
    }

    /**
     * 获取菜单列表（扁平树，前端 transform）
     * 有 title 搜索时：命中节点 + 祖先 + 子孙，保证子菜单可搜到并完整展示路径
     * 无搜索时：仍按根菜单分页，再挂两级子节点
     *
     * @throws ContainerExceptionInterface
     * @throws NotFoundExceptionInterface
     */
    public function list()
    {
        $title = trim((string) request()->get('title', ''));
        if ($title !== '') {
            return $this->listByTitleSearch($title);
        }

        $this->where[] = ['pid', '=', 0];
        $list = $this->getPageList();
        $ids = array_column($list['items'], 'id');
        if (empty($ids)) {
            return $list;
        }
        $items = $this->model::where('deleted_at', 0)->whereIn('pid', $ids)->orderBy('sort')->get($this->selectField);
        $childrenIds = [];
        foreach ($items as $v) {
            $list['items'][] = $v;
            $childrenIds[] = $v['id'];
        }
        if (!empty($childrenIds)) {
            $items = $this->model::where('deleted_at', 0)->whereIn('pid', $childrenIds)->orderBy('sort')->get($this->selectField);
            foreach ($items as $v) {
                $list['items'][] = $v;
            }
        }
        return $list;
    }

    /**
     * 按标题模糊搜索：返回命中项及其祖先、子孙，供树表正确拼装
     * 为什么要带祖先：仅返回子节点时 pid 找不到父级，树会丢节点或挂到根外
     */
    private function listByTitleSearch(string $title): array
    {
        $all = $this->model::where('deleted_at', 0)
            ->orderBy('sort')
            ->get($this->selectField)
            ->keyBy('id');
        if ($all->isEmpty()) {
            return $this->emptyPageList();
        }

        $matchedIds = [];
        foreach ($all as $id => $row) {
            $rowTitle = (string) ($row['title'] ?? '');
            if ($rowTitle !== '' && mb_stripos($rowTitle, $title) !== false) {
                $matchedIds[] = (int) $id;
            }
        }
        if (empty($matchedIds)) {
            return $this->emptyPageList();
        }

        // 子节点按 pid 分组，便于向下展开子孙
        $childrenMap = [];
        foreach ($all as $id => $row) {
            $pid = (int) ($row['pid'] ?? 0);
            $childrenMap[$pid][] = (int) $id;
        }

        $needIds = [];
        foreach ($matchedIds as $mid) {
            // 向上：自身 + 祖先
            $cur = $mid;
            while ($cur > 0 && $all->has($cur) && !isset($needIds[$cur])) {
                $needIds[$cur] = true;
                $cur = (int) ($all[$cur]['pid'] ?? 0);
            }
            // 向下：命中节点的全部子孙（搜父级时仍能看到子树）
            $stack = [$mid];
            while (!empty($stack)) {
                $nodeId = array_pop($stack);
                foreach ($childrenMap[$nodeId] ?? [] as $cid) {
                    if (!isset($needIds[$cid])) {
                        $needIds[$cid] = true;
                        $stack[] = $cid;
                    }
                }
            }
        }

        $items = [];
        foreach ($all as $id => $row) {
            if (isset($needIds[(int) $id])) {
                $items[] = $row->toArray();
            }
        }

        return [
            'items' => $items,
            'page' => 1,
            'size' => count($items),
            'total' => count($items),
        ];
    }

    /**
     * 空分页结构（与 getPageList 对齐）
     */
    private function emptyPageList(): array
    {
        return [
            'items' => [],
            'page' => 1,
            'size' => 0,
            'total' => 0,
        ];
    }

    /**
     * 获取树形结构的菜单下拉
     * @param bool $isSelect
     * @return array
     */
    public function getTreeOption(bool $isSelect = false): array
    {
        $this->optionField = ['id', 'title', 'icon', 'pid'];
        $list = $this->model::get($this->optionField);
        $result = $this->utils->tree($list);
        if ($isSelect == 'true') {
            array_unshift($result, [ 'id' => 0, 'title' => '根目录', 'pid' => 0, 'icon' => '' ]);
        }
        return $result;
    }

    /**
     * 获取下拉列表
     * @return mixed
     * @throws ContainerExceptionInterface
     * @throws NotFoundExceptionInterface
     * @throws Exception
     */
    public function option(): mixed
    {
        $option = $this->getOption();
        if (request()->get('is_select', false)) {
            $result = [
                [ 'id' => 0, 'title' => '根目录' ]
            ];
            foreach ($option as $item) {
                $result[] = [ 'id' => $item['id'], 'title' => $item['title'] ];
            }
            return $result;
        }
        return $option;
    }

    /**
     * 获取数据详情
     * @param $id
     * @return mixed
     * @throws Exception
     */
    public function detail($id): mixed
    {
        return $this->getDetail($id);
    }

    /**
     * 新增数据
     * @param $params
     * @return mixed
     */
    public function create($params): mixed
    {
        $params['badge_type'] = !empty($params['badge_type']) ? $params['badge_type']: 0;
        $params['badge_variants'] = !empty($params['badge_variants']) ? $params['badge_variants']: 0;
        $params['created_at'] = time();
        return $this->insert($params);
    }

    /**
     * 编辑数据
     * @param $id
     * @param $params
     * @return mixed
     */
    public function update($id, $params): mixed
    {
        $params['badge_type'] = !empty($params['badge_type']) ? $params['badge_type']: 0;
        $params['badge_variants'] = !empty($params['badge_variants']) ? $params['badge_variants']: 0;
        $params['updated_at'] = time();
        return $this->save($id, $params);
    }

    /**
     * 删除数据
     * @param $ids
     * @return mixed
     */
    public function delete($ids): mixed
    {
        return $this->del($ids);
    }
}