<?php
class DevelopmentHistory_Action
{
    /**
     * 数据库对象
     */
    private $db;
    private $prefix;
    
    /**
     * 请求对象
     */
    private $request;
    
    /**
     * 响应对象
     */
    private $response;
    
    /**
     * 构造函数
     */
    public function __construct($request = null, $response = null)
    {
        $this->db = Typecho_Db::get();
        $this->prefix = $this->db->getPrefix();
        $this->request = $request ?: Typecho_Request::getInstance();
        $this->response = $response ?: Typecho_Response::getInstance();
    }
    
    /**
     * 添加历史记录 - 修复：使用Typecho正确的SQL构建方法
     */
    public function addHistory($data)
    {
        try {
            $now = new Typecho_Date(Typecho_Date::gmtTime());
            
            $insert = array(
                'content' => $data['content'],
                'event_date' => $data['event_date'],
                'post_cids' => isset($data['post_cids']) ? $this->cleanCids($data['post_cids']) : '',
                'created' => $now->format('Y-m-d H:i:s'),
                'modified' => $now->format('Y-m-d H:i:s'),
                'status' => 1
            );
            
            // 使用Typecho的查询构建器，但先验证数据
            $this->validateInsertData($insert);
            
            // 修复：正确构建并执行插入查询
            // 在Typecho中，insert()->rows()需要调用query()方法来执行
            $query = $this->db->insert($this->prefix . 'development_history')->rows($insert);
            
            // 执行查询
            $this->db->query($query);
            
            // 获取最后插入的ID - Typecho的方式
            $row = $this->db->fetchRow($this->db->select('LAST_INSERT_ID() as id'));
            return $row ? $row['id'] : 0;
            
        } catch (Exception $e) {
            error_log("addHistory Error: " . $e->getMessage());
            error_log("Data: " . print_r($data, true));
            throw new Exception("发布失败: " . $e->getMessage());
        }
    }
    
    /**
     * 验证插入数据
     */
    private function validateInsertData(&$data)
    {
        // 确保所有必需字段都有值
        if (empty($data['content'])) {
            throw new Exception("内容不能为空");
        }
        
        if (empty($data['event_date'])) {
            throw new Exception("日期不能为空");
        }
        
        // 验证日期格式
        if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $data['event_date'])) {
            throw new Exception("日期格式错误，应为YYYY-MM-DD");
        }
        
        // 清理和转义内容
        $data['content'] = trim($data['content']);
        if (empty($data['content'])) {
            throw new Exception("内容不能为空");
        }
        
        // 确保所有字段都是字符串
        foreach ($data as $key => $value) {
            if (!is_string($value) && !is_numeric($value)) {
                $data[$key] = (string)$value;
            }
        }
    }
    
    /**
     * 批量添加历史记录（按事件时间排序插入，越近的ID越大）
     */
    public function batchAddHistories($histories)
    {
        // 按事件时间排序，越近的时间越晚插入，这样ID越大
        usort($histories, function($a, $b) {
            return strtotime($a['event_date']) - strtotime($b['event_date']);
        });
        
        $now = new Typecho_Date(Typecho_Date::gmtTime());
        $nowStr = $now->format('Y-m-d H:i:s');
        
        foreach ($histories as $history) {
            $insert = array(
                'content' => $history['content'],
                'event_date' => $history['event_date'],
                'post_cids' => '',
                'created' => $nowStr,
                'modified' => $nowStr,
                'status' => 1
            );
            
            $query = $this->db->insert($this->prefix . 'development_history')->rows($insert);
            $this->db->query($query);
        }
    }
    
    /**
     * 更新历史记录
     */
    public function updateHistory($data)
    {
        try {
            $now = new Typecho_Date(Typecho_Date::gmtTime());
            
            $update = array(
                'content' => $data['edit_content'],
                'event_date' => $data['edit_event_date'],
                'post_cids' => isset($data['edit_post_cids']) ? $this->cleanCids($data['edit_post_cids']) : '',
                'modified' => $now->format('Y-m-d H:i:s')
            );
            
            $query = $this->db->update($this->prefix . 'development_history')
                ->rows($update)
                ->where('id = ?', intval($data['edit_id']));
            
            $this->db->query($query);
            
        } catch (Exception $e) {
            error_log("updateHistory Error: " . $e->getMessage());
            throw new Exception("更新失败: " . $e->getMessage());
        }
    }
    
    /**
     * 删除历史记录
     */
    public function deleteHistory($id)
    {
        $query = $this->db->delete($this->prefix . 'development_history')->where('id = ?', intval($id));
        $this->db->query($query);
    }
    
    /**
     * 批量删除
     */
    public function deleteHistories($ids)
    {
        foreach ($ids as $id) {
            $this->deleteHistory(intval($id));
        }
    }
    
    /**
     * 获取历史记录
     */
    public function getHistories($page = 1, $perPage = 10)
    {
        $offset = ($page - 1) * $perPage;
        
        $query = $this->db->select()
            ->from($this->prefix . 'development_history')
            ->where('status = ?', 1)
            ->order('id', Typecho_Db::SORT_DESC)
            ->limit($perPage)
            ->offset($offset);
        
        return $this->db->fetchAll($query);
    }
    
    /**
     * 获取所有历史记录（用于导出）
     */
    public function getAllHistories()
    {
        $query = $this->db->select()
            ->from($this->prefix . 'development_history')
            ->where('status = ?', 1)
            ->order('id', Typecho_Db::SORT_DESC);
        
        return $this->db->fetchAll($query);
    }
    
    /**
     * 获取总记录数
     */
    public function getTotalCount()
    {
        $query = $this->db->select('COUNT(*) as count')
            ->from($this->prefix . 'development_history')
            ->where('status = ?', 1);
        
        $result = $this->db->fetchRow($query);
        return $result['count'];
    }
    
    /**
     * 获取单条记录
     */
    public function getHistory($id)
    {
        $query = $this->db->select()
            ->from($this->prefix . 'development_history')
            ->where('id = ?', $id)
            ->limit(1);
        
        return $this->db->fetchRow($query);
    }
    
    /**
     * 根据文章CID获取文章信息
     */
    public function getPostByCid($cid)
    {
        try {
            $query = $this->db->select('cid, title, slug, created')
                ->from($this->prefix . 'contents')
                ->where('cid = ?', intval($cid))
                ->where('type = ?', 'post')
                ->where('status = ?', 'publish')
                ->limit(1);
            
            $post = $this->db->fetchRow($query);
            
            if ($post) {
                $options = Typecho_Widget::widget('Widget_Options');
                if (!empty($post['slug'])) {
                    $post['url'] = Typecho_Common::url($post['slug'] . '.html', $options->index);
                } else {
                    $post['url'] = Typecho_Common::url('archives/' . $post['cid'], $options->index);
                }
            }
            
            return $post;
        } catch (Exception $e) {
            return null;
        }
    }
    
    /**
     * 清理CID字符串
     */
    private function cleanCids($cids)
    {
        if (empty($cids)) {
            return '';
        }
        
        $cidsArray = array_filter(array_map('trim', explode(',', $cids)));
        $validCids = array();
        
        foreach ($cidsArray as $cid) {
            if (is_numeric($cid) && $cid > 0) {
                $validCids[] = intval($cid);
            }
        }
        
        // 去重并返回逗号分隔的字符串
        return implode(',', array_unique($validCids));
    }
    
    /**
     * 导出数据为文本格式
     */
    public function exportData()
    {
        $histories = $this->getAllHistories();
        $content = '';
        
        foreach ($histories as $history) {
            // 使用 Y.m.d 格式导出
            $date = date('Y.m.d', strtotime($history['event_date']));
            $text = str_replace(array("\r\n", "\r", "\n"), " ", $history['content']);
            $content .= $date . ' ' . $text . "\n";
        }
        
        return $content;
    }
    
    /**
     * 导入数据（增强版，支持调试）
     */
    public function importData($text)
    {
        // 标准化换行符
        $text = str_replace("\r\n", "\n", $text);
        $text = str_replace("\r", "\n", $text);
        
        $lines = explode("\n", $text);
        $imported = 0;
        $failed = 0;
        $failReasons = array(); // 记录失败原因
        $histories = array();
        
        foreach ($lines as $lineNum => $line) {
            $line = trim($line);
            if (empty($line)) continue;
            
            // 移除行尾的分号（如果有）
            if (substr($line, -1) === ';') {
                $line = substr($line, 0, -1);
                $line = trim($line);
            }
            
            // 找到第一个空格的位置来分割日期和内容
            $firstSpacePos = strpos($line, ' ');
            if ($firstSpacePos === false) {
                $failed++;
                $failReasons[] = "第 " . ($lineNum + 1) . " 行：找不到空格分隔日期和内容 - '{$line}'";
                continue;
            }
            
            $date = trim(substr($line, 0, $firstSpacePos));
            $content = trim(substr($line, $firstSpacePos + 1));
            
            // 验证日期格式 - 支持单个数字的月份和日期
            // 允许的格式：YYYY.M.D, YYYY.MM.D, YYYY.M.DD, YYYY.MM.DD
            $datePattern = '/^(\d{4})\.(\d{1,2})\.(\d{1,2})$/';
            if (!preg_match($datePattern, $date, $matches)) {
                $failed++;
                $failReasons[] = "第 " . ($lineNum + 1) . " 行：日期格式错误，应为 YYYY.M[M].D[D] - '{$date}'";
                continue;
            }
            
            // 检查日期是否有效
            $year = intval($matches[1]);
            $month = intval($matches[2]);
            $day = intval($matches[3]);
            
            if (!checkdate($month, $day, $year)) {
                $failed++;
                $failReasons[] = "第 " . ($lineNum + 1) . " 行：无效的日期 - {$date}";
                continue;
            }
            
            // 转换日期格式为 Y-m-d 以便数据库存储，补零成两位数字
            $dbDate = sprintf('%04d-%02d-%02d', $year, $month, $day);
            
            // 验证内容
            if (empty($content)) {
                $failed++;
                $failReasons[] = "第 " . ($lineNum + 1) . " 行：内容为空";
                continue;
            }
            
            $histories[] = array(
                'event_date' => $dbDate,
                'content' => $content
            );
            $imported++;
        }
        
        if (!empty($histories)) {
            $this->batchAddHistories($histories);
        }
        
        // 返回包含失败原因的结果
        return array(
            'imported' => $imported, 
            'failed' => $failed,
            'fail_reasons' => $failReasons
        );
    }
}