JianShu/app/src/main/java/com/zjgsu/jianshu/Activity/HotBookActivity.kt

package com.zjgsu.jianshu
import android.content.Context
import android.content.Intent
import android.os.Bundle
import android.text.TextUtils
import android.util.Log
import android.widget.SearchView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.StaggeredGridLayoutManager
import cn.bmob.v3.Bmob
import cn.bmob.v3.BmobQuery
import cn.bmob.v3.exception.BmobException
import cn.bmob.v3.listener.FindListener
import com.zjgsu.jianshu.*
import com.zjgsu.jianshu.Adapter.BillboardAdapter
import com.zjgsu.jianshu.Adapter.BookRankAdapter
import com.zjgsu.jianshu.Bmob.Book_info_bmob
import kotlinx.android.synthetic.main.activity_bookrank.*
import kotlinx.android.synthetic.main.activity_main.*

class HotBookActivity: AppCompatActivity() {
    private var hotbookList=ArrayList<Book_rank>()
    lateinit var adapter:BookRankAdapter
    lateinit var currentPosition: Pair<Int, Int>
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_bookrank)
        Bmob.initialize(this, "8f9f1d1ea520b0ce4f84a6fa83a5f754")//连接bmob
        val userId = getSharedPreferences("userinf", Context.MODE_PRIVATE).getString("user_id", "").toString()
        adapter= BookRankAdapter(this,hotbookList,true,userId)
        bookrank_recyclerView.layoutManager=StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.VERTICAL)
        bookrank_recyclerView.adapter=adapter
        bookrank_swipeRefresh.setOnRefreshListener {
            loadBookRanks()    //下拉刷新
        }
        loadBookRanks()
        bookrank_title.text="一周热门图书榜单"
        bookrank_subtitle.text="10本・ 8213人关注"
        returnTOCity()
    }
    private fun loadBookRanks(){
        val queryHotBooks = BmobQuery<Book_info_bmob>()
        queryHotBooks.order("-countOfReaders") // 根据 countOfReaders 降序排序
        queryHotBooks.setLimit(10) // 限制查询结果的数量为10
        queryHotBooks.findObjects(object : FindListener<Book_info_bmob>() {
            override fun done(books: List<Book_info_bmob>?, e: BmobException?) {
                bookrank_swipeRefresh.isRefreshing = false
                if (e == null) {
                    // 检查 books 是否非空
                    if (books != null && books.isNotEmpty()) {
                        hotbookList.clear() // 清空当前列表
                        // 遍历 books 并转换为 Book_rank 类型后添加到列表
                        books.forEach { b ->
                            val bookRank = Book_rank(
                                name = b.name,
                                picUrl = b.picture.url,
                                score="0.0",
                                courtOfReaders = b.countOfReaders,
                                author=b.author_name,
                                intro=b.introduce
                            )
                            hotbookList.add(bookRank)
                            adapter.notifyDataSetChanged()  // 确保在这里更新适配器
                        }
                    }
                } else {
                    // 处理错误情况
                    Toast.makeText(
                        this@HotBookActivity,
                        "Failed to retrieve books: ${e.message}",
                        Toast.LENGTH_SHORT
                    ).show()
                }
            }
        })
    }
    //TODO：未来添加一个返回到上个页面指定位置的功能
    private fun returnTOCity() {
        bookrank_return.setOnClickListener {
            val intent = Intent(this, MainActivity::class.java)
            startActivity(intent)
            finish() // 结束当前页面
        }
    }
}