<?php

namespace app\common\Service\Goods;

use app\common\model\Comment;
use app\common\model\Order;
use app\common\model\OrderAction;
use app\common\Enum\OrderEnum;
use app\common\Enum\CommentEnum;
use think\Db;
use think\Exception;
use app\common\exception\BusinessException;
use app\common\Enum\StatusEnum;

class CommentService
{
    /**
     * 获取评论列表
     * @param array $params 查询参数
     * @return \think\Paginator
     */
    public static function getCommentList($params = [])
    {
        $goods_id = isset($params['goods_id']) ? (int)$params['goods_id'] : 0;
        $pid = isset($params['pid']) ? (int)$params['pid'] : 0;
        $has_picture = isset($params['has_picture']) ? (int)$params['has_picture'] : '';
        
        $orderBy = isset($params['order_by']) ? $params['order_by'] : 'id';
        $orderWay = isset($params['order_way']) ? strtolower($params['order_way']) : 'desc';
       
        $page = isset($params['page']) ? (int)$params['page'] : 1;
        $pageSize = isset($params['page_size']) ? $params['page_size'] : 10;

        $orderWay = in_array($orderWay, ['asc', 'desc']) ? $orderWay : 'desc';

        $where = [
            'evaluate_status' => CommentEnum::EVALUATE_STATUS_APPROVED,
            'status' => StatusEnum::ENABLED
        ];
        
        if ($goods_id > 0) {
            $where['goods_id'] = $goods_id;
        }
        
        if ($pid !== '') {
            $where['pid'] = $pid;
        }
        
        // 添加有图评论过滤
        if ($has_picture !== '') {
            $where['has_picture'] = $has_picture;
        }

        $order = $orderBy == 'rand' ? 'rand()' : (in_array($orderBy, ['pid', 'id', 'createtime', 'updatetime']) ? "{$orderBy} {$orderWay}" : "id {$orderWay}");

        $list = Comment::with(['user', 'reply' => function ($query) {
            $query->with(['manage' => function ($user) {
                $user->field('id,nickname');
            }]);
        }])
            ->where($where)
            ->order($order)
            ->paginate($pageSize, false, ['page' => $page]);
        return $list;
    }

    /**
     * 获取商品好评度
     * @param int $goods_id 商品ID
     * @return float
     */
    public static function degree($goods_id)
    {
        $total = Comment::where('goods_id', $goods_id)
            ->where('pid', 0)
            ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
            ->where('status', CommentEnum::STATUS_NORMAL)
            ->sum('star');
            
        $favorable = Comment::where('goods_id', $goods_id)
            ->where('pid', 0)
            ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
            ->where('status', CommentEnum::STATUS_NORMAL)
            ->where('star', '>', 3)
            ->sum('star');
            
        if (!$total || !$favorable) {
            return 100;
        }
        
        return bcmul(bcdiv($favorable, $total, 2), 100);
    }

    /**
     * 获取用户评论列表
     * @param int $user_id 用户ID
     * @param int $page 页码
     * @param int $pagesize 每页数量
     * @return \think\Paginator
     */
    public static function getUserCommentList($user_id, $page = 1, $pagesize = 10)
    {
        $list = Comment::with([
            'Goods' => function ($query) {
                $query->field('id,title,image');
            }
        ])
            ->where('user_id', $user_id)
            ->where('pid', 0)
            ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
            ->where('status', CommentEnum::STATUS_NORMAL)
            ->order('createtime desc')
            ->paginate($pagesize, false, ['page' => $page]);
            
        return $list;
    }

    /**
     * 添加评论
     * @param int $user_id 用户ID
     * @param int $order_id 订单ID
     * @param array $remark 评论内容
     * @param int $pid 父评论ID
     * @return bool
     * @throws Exception
     */
    public static function addComment($user_id, $order_id, $remark, $pid = 0)
    {
        // 验证订单
        $order = Order::with(['OrderGoods'])
            ->where('id', $order_id)
            ->where('order_status', OrderEnum::STATUS_CONFIRM)
            ->where('user_id', $user_id)
            ->find();

        if (!$order) {
            throw new BusinessException('未找到可评论的订单');
        }
        
        // 检查是否已评论
        $existComment = Comment::where('user_id', $user_id)
            ->where('order_id', $order->id)
            ->find();
            
        if ($existComment) {
            throw new BusinessException('订单已评论');
        }

        // 获取可评价的商品
        $goods_ids = [];
        foreach ($order->order_goods as $item) {
            $goods_ids[] = $item['goods_id'];
        }

        // 验证评论数据并组装
        $data = [];
        foreach ($remark as $item) {
            if (!in_array($item['goods_id'], $goods_ids)) {
                throw new BusinessException('存在不可评价的商品');
            }
            
            // 处理图片
            $images = isset($item['images']) ? $item['images'] : [];
            $has_picture = !empty($images) ? CommentEnum::HAS_PICTURE_YES : CommentEnum::HAS_PICTURE_NO;
            
            $data[] = [
                'pid'              => $pid,
                'order_id'         => $order['id'],
                'user_id'          => $user_id,
                'goods_id'         => $item['goods_id'],
                'star'             => $item['star'],
                'content'          => $item['content'],
                'images'           => is_array($images) ? implode(',', $images) : $images,
                'has_picture'      => $has_picture,
                'ip'               => request()->ip(),
                'useragent'        => substr(request()->server('HTTP_USER_AGENT'), 0, 255),
                'evaluate_status'  => CommentEnum::EVALUATE_STATUS_PENDING,
            ];
        }

        // 事务处理
        Db::startTrans();
        try {
            // 批量添加评论
            $comment = new Comment();
            $comment->saveAll($data);
            
            // 更新订单状态
            $order->order_status = OrderEnum::STATUS_COMMENT;
            $order->save();
            
            // 更新订单商品评论状态
            foreach ($order->order_goods as $item) {
                $item->save(['comment_status' => 1]);
            }
            
            // 添加订单日志
            OrderAction::push($order->order_sn, '系统', '订单已完成');
            
            Db::commit();
            return true;
            
        } catch (\Exception $e) {
            Db::rollback();
            throw new BusinessException('添加评论失败：' . $e->getMessage());
        }
    }

    /**
     * 批量保存评论（原方法保留）
     * @param array $data 评论数据
     * @return bool
     */
    public static function saveComments($data)
    {
        $comment = new Comment();
        return $comment->saveAll($data);
    }

    /**
     * 审核评论
     * @param int $comment_id 评论ID
     * @param int $evaluate_status 评价状态
     * @return bool
     * @throws Exception
     */
    public static function auditComment($comment_id, $evaluate_status)
    {
        if (!CommentEnum::isValidEvaluateStatus($evaluate_status)) {
            throw new BusinessException('评价状态参数错误');
        }
        
        $comment = Comment::where('id', $comment_id)->find();
        if (!$comment) {
            throw new BusinessException('评论不存在');
        }
        
        $status = $evaluate_status == CommentEnum::EVALUATE_STATUS_APPROVED ? 
                  CommentEnum::STATUS_NORMAL : CommentEnum::STATUS_HIDDEN;
        
        return $comment->save([
            'evaluate_status' => $evaluate_status,
            'status' => $status
        ]);
    }

    /**
     * 获取商品评论统计
     * @param int $goods_id 商品ID
     * @return array
     */
    public static function getCommentStats($goods_id)
    {
        $total = Comment::where('goods_id', $goods_id)
            ->where('pid', 0)
            ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
            ->where('status', CommentEnum::STATUS_NORMAL)
            ->count();
            
        $star_counts = [];
        for ($i = 1; $i <= 5; $i++) {
            $star_counts[$i] = Comment::where('goods_id', $goods_id)
                ->where('pid', 0)
                ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
                ->where('status', CommentEnum::STATUS_NORMAL)
                ->where('star', $i)
                ->count();
        }
        
        // 有图评论统计
        $picture_count = Comment::where('goods_id', $goods_id)
            ->where('pid', 0)
            ->where('evaluate_status', CommentEnum::EVALUATE_STATUS_APPROVED)
            ->where('status', CommentEnum::STATUS_NORMAL)
            ->where('has_picture', CommentEnum::HAS_PICTURE_YES)
            ->count();
        
        return [
            'total' => $total,
            'star_counts' => $star_counts,
            'picture_count' => $picture_count,
            'degree' => self::degree($goods_id)
        ];
    }
}