<?php
namespace app\admin\model\cms;

use addons\cms\library\FulltextSearch;
use addons\cms\library\MeiliSearch;
use addons\cms\library\Service;
use think\facade\Config;
use think\facade\Db;
use think\facade\Event;
use think\Model;

class Cms extends Model
{
    protected $autoWriteTimestamp = true;
    protected $ext_table = '_data';
    protected $name = 'cms_field';
    protected static $config = [];

    protected static function init()
    {
        self::$config = get_addon_config('cms');
    }

    protected function physicalTableName($tableName)
    {
        $prefix = Config::get('database.connections.mysql.prefix', '');
        return strpos($tableName, $prefix) === 0 ? $tableName : $prefix . $tableName;
    }

    protected function getTableColumns($tableName)
    {
        static $cache = [];
        $tableName = $this->physicalTableName($tableName);
        if (!isset($cache[$tableName])) {
            $columns = Db::getFields($tableName);
            $cache[$tableName] = array_map('strtolower', array_keys($columns));
        }
        return $cache[$tableName];
    }

    protected function hasColumn($tableName, $column)
    {
        return in_array(strtolower($column), $this->getTableColumns($tableName), true);
    }

    protected function filterDataByColumns(array $data, array $columns)
    {
        $result = [];
        foreach ($data as $key => $value) {
            if (in_array(strtolower($key), $columns, true)) {
                $result[$key] = $value;
            }
        }
        return $result;
    }

    protected function getLangWhere($extTableName, $id, $lang)
    {
        $where = ['did' => $id];
        if ($this->hasColumn($extTableName, 'lang')) {
            $where['lang'] = $lang;
        }
        return $where;
    }

    protected function isChineseLang($lang)
    {
        return in_array(strtolower((string) $lang), ['cn', 'zh', 'zh-cn'], true);
    }

    protected function getChineseTitleFromExtTable($extTableName, $id, $lang, array $dataExt, array $extColumns)
    {
        if ($this->isChineseLang($lang) && array_key_exists('title', $dataExt)) {
            return $dataExt['title'];
        }
        if (!in_array('lang', $extColumns, true)) {
            return null;
        }
        $row = Db::table($extTableName)->where('did', $id)->where('lang', 'in', ['cn', 'zh', 'zh-cn'])->orderRaw("field(lang,'cn','zh','zh-cn')")->find();
        return $row && array_key_exists('title', $row) ? $row['title'] : null;
    }

    protected function splitLangFields(array $data, array $dataExt = [], $lang = 'cn', array $mainColumns = [], array $extColumns = [])
    {
        $defaultLang = Db::name('lang')->where('is_default', 1)->value('mark') ?: 'cn';
        $langFields = ['title', 'keywords', 'description', 'tags'];
        foreach ($langFields as $field) {
            if (!array_key_exists($field, $data)) {
                continue;
            }
            $value = $data[$field];
            $mainHas = in_array(strtolower($field), $mainColumns, true);
            $extHas = in_array(strtolower($field), $extColumns, true);
            if ($extHas) {
                $dataExt[$field] = $value;
            }
            if (!$mainHas || $lang !== $defaultLang) {
                unset($data[$field]);
            }
        }
        return [$data, $dataExt];
    }

    public function addModelData($data, $dataExt = [], $lang = 'cn')
    {
        $catid = (int) $data['catid'];
        $category = Category::find($catid);
        $modelid = $category['modelid'];

        $eventResult = Event::trigger('cms_content_add', [$data, $dataExt]);
        if ($eventResult) {
            [$data, $dataExt] = array_map('array_merge', [$data, $dataExt], ...$eventResult);
        }

        $tablename = $this->physicalTableName(Models::where('id', $modelid)->value('tablename'));
        $extTableName = $tablename . $this->ext_table;
        $mainColumns = $this->getTableColumns($tablename);
        $extColumns = $this->getTableColumns($extTableName);

        Service::getAfterText($data, $dataExt);
        [$data, $dataExt] = $this->splitLangFields($data, $dataExt, $lang, $mainColumns, $extColumns);

        $data['admin_id'] = session('admin.id') ?: 0;
        [$data, $dataExt] = Service::dealModelPostData($modelid, $data, $dataExt);
        $data = $this->filterDataByColumns($data, $mainColumns);
        $dataExt = $this->filterDataByColumns($dataExt, $extColumns);

        if (!isset($data['publish_time'])) {
            $data['publish_time'] = request()->time();
        }
        $data['create_time'] = request()->time();
        $data['update_time'] = request()->time();

        try {
            $id = Db::table($tablename)->insertGetId($data);
            if (!empty($dataExt['tags'])) {
                $this->tagDispose($dataExt['tags'], $id, $catid, $modelid);
            }
            if (!empty($dataExt)) {
                $dataExt['did'] = $id;
                if (in_array('lang', $extColumns, true)) {
                    $dataExt['lang'] = $lang;
                    $whereExt = $this->getLangWhere($extTableName, $id, $lang);
                    $exists = Db::table($extTableName)->where($whereExt)->find();
                    if ($exists) {
                        Db::table($extTableName)->where($whereExt)->update($dataExt);
                    } else {
                        Db::table($extTableName)->insert($dataExt);
                    }
                } else {
                    $exists = Db::table($extTableName)->where(['did' => $id])->find();
                    if ($exists) {
                        Db::table($extTableName)->where(['did' => $id])->update($dataExt);
                    } else {
                        Db::table($extTableName)->insert($dataExt);
                    }
                }
            }
        } catch (\Exception $e) {
            throw new \Exception($e->getMessage());
        }

        $category->inc('items')->save();
        if (self::$config['site_weburlpush']) {
            hook('weburlpush', buildContentUrl($catid, $id, $data['url'] ?? '', true, true));
        }
        if (self::$config['site_searchtype'] === 'xunsearch') {
            FulltextSearch::update($modelid, $catid, $id, $data, $dataExt);
        }
        if (self::$config['site_searchtype'] === 'meilisearch') {
            MeiliSearch::update($modelid, $catid, $id, $data, $dataExt);
        }
        return $id;
    }

    public function editModelData($data, $dataExt = [], $lang = 'cn')
    {
        $catid = (int) $data['catid'];
        $id = (int) $data['id'];

        $category = Category::find($catid);
        $modelid = $category['modelid'];

        $eventResult = Event::trigger('cms_content_edit', [$data, $dataExt]);
        if ($eventResult) {
            [$data, $dataExt] = array_map('array_merge', [$data, $dataExt], ...$eventResult);
        }

        $tablename = $this->physicalTableName(Models::where('id', $modelid)->value('tablename'));
        $extTableName = $tablename . $this->ext_table;
        $mainColumns = $this->getTableColumns($tablename);
        $extColumns = $this->getTableColumns($extTableName);

        Service::getAfterText($data, $dataExt);
        [$data, $dataExt] = $this->splitLangFields($data, $dataExt, $lang, $mainColumns, $extColumns);

        $defaultLang = Db::name('lang')->where('is_default', 1)->value('mark') ?: 'cn';
        if (!empty($dataExt['tags'])) {
            $this->tagDispose($dataExt['tags'], $id, $catid, $modelid);
        } else {
            $this->tagDispose([], $id, $catid, $modelid);
        }
        [$data, $dataExt] = Service::dealModelPostData($modelid, $data, $dataExt);
        $data = $this->filterDataByColumns($data, $mainColumns);
        $dataExt = $this->filterDataByColumns($dataExt, $extColumns);
        if (in_array('title', $mainColumns, true) && in_array('title', $extColumns, true)) {
            $chineseTitle = $this->getChineseTitleFromExtTable($extTableName, $id, $lang, $dataExt, $extColumns);
            if ($chineseTitle !== null) {
                $data['title'] = $chineseTitle;
            }
        }
        if ($lang !== $defaultLang) {
            foreach (['keywords', 'description', 'tags'] as $field) {
                unset($data[$field]);
            }
        }

        if (!isset($data['update_time'])) {
            $data['update_time'] = request()->time();
        }
        $info = Db::table($tablename)->where('id', $id)->find();
        if (empty($info)) {
            throw new \Exception('该信息不存在！');
        }

        Db::table($tablename)->where('id', $id)->update($data);

        if (!empty($dataExt)) {
            $whereExt = $this->getLangWhere($extTableName, $id, $lang);
            $exists = Db::table($extTableName)->where($whereExt)->find();
            if ($exists) {
                Db::table($extTableName)->where($whereExt)->update($dataExt);
            } else {
                $dataExt['did'] = $id;
                if (in_array('lang', $extColumns, true)) {
                    $dataExt['lang'] = $lang;
                }
                Db::table($extTableName)->insert($dataExt);
            }
        }

        if ($info['sysadd'] == 0) {
            CmsContent::where('catid', $catid)->where('content_id', $id)->update(['status' => $data['status']]);
        }
        if (self::$config['site_searchtype'] === 'xunsearch') {
            FulltextSearch::update($modelid, $catid, $id, $data, $dataExt);
        }
        if (self::$config['site_searchtype'] === 'meilisearch') {
            MeiliSearch::update($modelid, $catid, $id, $data, $dataExt);
        }
    }

    public function deleteModelData($catid, $id, $no_delete = false)
    {
        $category = Category::find($catid);
        if (empty($category)) {
            throw new \Exception('栏目不存在！');
        }
        $modelid = $category['modelid'];
        $model = Models::where('id', $modelid)->find();
        $tableName = $this->physicalTableName($model['tablename']);
        $data = Db::table($tableName)->where('id', $id)->find();
        if (empty($data)) {
            throw new \Exception('该信息不存在！');
        }
        if (!empty($data['tags'])) {
            $this->tagDispose([], $data['id'], $data['catid'], $modelid);
        }
        if ($no_delete) {
            Db::table($tableName)->where('id', $id)->update(['status' => -1]);
        } else {
            Db::table($tableName)->where('id', $id)->delete();
            if (2 == $model['type']) {
                Db::table($tableName . $this->ext_table)->where('did', $id)->delete();
            }
            if ($category['items']) {
                $category->dec('items')->save();
            }
        }
        if ($data['sysadd'] == 0) {
            CmsContent::where('catid', $data['catid'])->where('content_id', $data['id'])->delete();
        }
        if (self::$config['site_searchtype'] === 'xunsearch') {
            FulltextSearch::del($data['catid'], $id);
        }
        if (self::$config['site_searchtype'] === 'meilisearch') {
            MeiliSearch::del($data['catid'], $id);
        }
    }

    private function tagDispose($tags, $id, $catid, $modelid)
    {
        if (!empty($tags)) {
            $keyword = strpos($tags, ',') === false ? explode(' ', $tags) : explode(',', $tags);
            $keyword = array_unique($keyword);
            if ('add' == request()->action()) {
                (new Tags)->addTag($keyword, $id, $catid);
            } else {
                (new Tags)->updata($keyword, $id, $catid);
            }
        } else {
            (new Tags)->deleteAll($id, $catid);
        }
    }
}