<?php
namespace app\api\controller;

use app\common\model\chat\ChatConversation;
use app\common\model\chat\ChatMessage;
use app\common\model\coach\Coach;
use app\common\model\user\User;
use think\facade\Db;

class ChatController extends BaseApiController
{
    /**
     * 获取技师信息
     */
    public function info()
    {
        // 获取技师ID
        $techId = $this->request->param('id/d', 0);

        if (!$techId) {
            return json([
                'code' => 400,
                'msg' => '技师ID不能为空'
            ]);
        }

        try {
            // 查询技师信息
            $tech = Coach::find($techId);

            if (!$tech) {
                return json([
                    'code' => 404,
                    'msg' => '技师不存在'
                ]);
            }

            // 格式化返回数据
            $result = [
                'id' => $tech['id'],
                'name' => $tech['name'],
                'avatar' => $tech['work_photo'],
                'service_count' => $tech['service_count'],
                'rating' => $tech['rating'],
                'skills' => $tech['skills'],
                'description' => $tech['description'],
                'status' => $tech['status'],
                'create_time' => $tech['create_time']
            ];

            return json([
                'code' => 200,
                'msg' => '成功',
                'data' => $result
            ]);
        } catch (\Exception $e) {
            return json([
                'code' => 500,
                'msg' => '获取技师信息失败: ' . $e->getMessage()
            ]);
        }
    }

    // 获取会话ID
    public function conversation_id()
    {
        $techId = $this->request->param('tech_id/d', 0);
        $userId =   $this->userId;

        if (!$techId||!$userId) {
            return json(['code' => 400, 'msg' => '用户ID和技师ID不能为空']);
        }

        try {
            // 查询会话
            $conversation = Db::name('chat_conversation')
                ->where('user_id', $userId)
                ->where('tech_id', $techId)
                ->find();

            if ($conversation) {
                return json(['code' => 200, 'data' => ['conversation_id' => $conversation['id']]]);
            }

            // 创建新会话
            $conversationId = Db::name('chat_conversation')
                ->insertGetId([
                    'user_id' => $userId,
                    'tech_id' => $techId,
                    'unread_count' => 0,
                    'update_time' => date('Y-m-d H:i:s')
                ]);

            return json(['code' => 200, 'data' => ['conversation_id' => $conversationId]]);
        } catch (\Exception $e) {
            return json(['code' => 500, 'msg' => '获取会话ID失败: ' . $e->getMessage()]);
        }
    }


    /**
     * 获取聊天历史记录
     */
    public function history()
    {
        $params = $this->request->param();
        $conversationId = $params['conversation_id'] ?? 0;
        $page = $params['page'] ?? 1;
        $pageSize = $params['page_size'] ?? 20;

        $where = [
            'conversation_id' => $conversationId
        ];

        $query = ChatMessage::where($where)
            ->order('id', 'asc');

        $list = $query->page($page, $pageSize)
            ->select();

        $total = $query->count();

        foreach ($list as &$item) {
            if ($item['sender_type']==1){//发送者类型是用户的话 则获取用户信息
                $item['user']   = User::find($item['sender_id']);
            }else{
                $item['user']   = Coach::find($item['sender_id']);
            }

        }

        return json([
            'code' => 200,
            'data' => [
                'list' => $list,
                'total' => $total,
                'has_more' => $total > $page * $pageSize
            ]
        ]);
    }

    /**
     * 发送消息
     */
    public function send()
    {
        $params = $this->request->param();

        $techId = $params['tech_id'] ?? 0;
        $orderId = $params['order_id'] ?? 0;
        $content = $params['content'] ?? '';

        if (empty($content)) {
            return json(['code' => 400, 'msg' => '消息内容不能为空']);
        }
        // 生成会话ID
        $conversation   =   ChatConversation::where(['tech_id'=>$techId,'user_id'=>$this->userId])->find();
        if (empty($conversation)) {
            $cccc   =   new ChatConversation;
            $conversationId   =   $cccc->insertGetId(['tech_id'=>$techId,'user_id'=>$this->userId]);
        }else{
            $conversationId =   $conversation['id'];
        }

        // 创建消息
        $message = new ChatMessage();
        $message->conversation_id = $conversationId;
        $message->sender_id = $this->userId;
        $message->sender_type = ChatMessage::SENDER_USER; // 用户
        $message->receiver_id = $techId;
        $message->receiver_type = ChatMessage::SENDER_TECH; // 技师
        $message->content = $content;
        $message->message_type = ChatMessage::TYPE_TEXT; // 文本
        $message->read_status = ChatMessage::UNREAD; // 未读
        $message->order_id = $orderId;
        $message->save();

        // TODO: 这里应该通过WebSocket推送给技师

        return json(['code' => 200, 'msg' => '发送成功', 'data' => $message]);
    }

    /**
     * 标记消息为已读
     */
    public function markAsRead()
    {
        $params = $this->request->param();

        $conversationId = $params['conversation_id'] ?? '';
        $userId = $this->request->uid;

        if (empty($conversationId)) {
            return json(['code' => 400, 'msg' => '会话ID不能为空']);
        }

        // 标记消息为已读
        Db::name('chat_message')
            ->where('conversation_id', $conversationId)
            ->where('receiver_id', $userId)
            ->where('read_status', ChatMessage::UNREAD)
            ->update(['read_status' => ChatMessage::READ]);

        return json(['code' => 200, 'msg' => '已标记为已读']);
    }

    /**
     * 获取未读消息数量
     */
    public function unreadCount()
    {
        $unreadCount = ChatMessage::where([
            'conversation_id' => $this->request->uid,
            'receiver_type' => ChatMessage::SENDER_USER, // 用户
            'read_status' => ChatMessage::UNREAD
        ])->count();

        return json(['code' => 200, 'data' => ['count' => $unreadCount]]);
    }

    /**
     * 获取最后一条消息
     */
    public function lastMessage()
    {

        // 生成会话ID
        $conversationId = $this->request->param('conversation_id/d', 0);

        $message = ChatMessage::where([
            'conversation_id' => $conversationId,
        ])
            ->order('id', 'desc')
            ->find();

        return json(['code' => 200, 'data' => $message]);
    }
}