BuyWhatNative/app/src/main/java/xyz/mtfos/buywhat/ItemRandom.kt

package xyz.mtfos.buywhat

import android.annotation.SuppressLint
import android.content.Context
import android.os.Bundle
import android.os.Handler
import android.os.Message
import android.view.View
import android.view.ViewGroup
import android.widget.*
import org.json.JSONArray
import org.json.JSONObject
import xyz.mtfos.tools.apiObject
import xyz.mtfos.tools.objectTool.bind
import java.util.*
import kotlin.collections.ArrayList

/**
 * Created by jay on 2017/7/6.
 */
class ItemRandom : SampleActivity() {
    private val tvTitle: TextView by bind(R.id.tvTitle)
    private val ivRefresh: ImageView by bind(R.id.ivRefresh)
    private val lvCommodity: ListView by bind(R.id.lvCommodity)
    private var store_id: Int? = null
    private var itemList: ArrayList<JSONObject> = ArrayList()
    private var adapter: lvAdapter? = null
    private val rangeMin: EditText by bind(R.id.rangeMin)
    private val rangeMax: EditText by bind(R.id.rangeMax)
    private val btnRandom: Button by bind(R.id.btnRandom)
    private val tvResult: TextView by bind(R.id.tvResult)
    private val ivBack: ImageView by bind(R.id.ivBack)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setViewSource(R.layout.activity_item_random)

        tvTitle?.text = intent?.getStringExtra("name")
        store_id = intent?.getIntExtra("id", 0)

        adapter = lvAdapter(this@ItemRandom, 0)

        lvCommodity.adapter = adapter

        lvCommodity.setOnItemClickListener({parent, view, position, id ->
            val data: JSONObject = itemList.get(position) as JSONObject
            var sk:Boolean = data!!["skip"] as Boolean
            data?.put("skip", !sk)
            itemList.set(position, data)
            adapter?.notifyDataSetChanged()

            randomItem()
        })

        btnRandom.setOnClickListener{v->
            val json : JSONObject? = randomItem()
            val str : String = if(json != null) {
                "Result : ${json!!["name"]} $${json!!["price"]}"
            }else{
                "Result : 目標區間無商品"
            }
            tvResult.text = str
        }

        ivRefresh.setOnClickListener({ v ->
            getList()
        })

        ivBack.setOnClickListener({ v ->
            finish()
        })

        getList()
    }

    fun getList() {
        if(store_id == 0 || store_id == null) return
        resetView()
        toggleLoading(true)
        api.getItems(store_id!!, object: apiObject.apicb{
            override fun Callback(json: JSONObject?) {
                uiHandler.post { toggleLoading(false) }
                if(json!!["status"] == 1) {
                    val jarr :JSONArray = json!!["record"] as JSONArray
                    itemList.clear()
                    if(jarr.length() > 0) {
                        uiHandler.sendEmptyMessage(3)
                        for(i in 0..(jarr.length() - 1)){
                            val tmp: JSONObject =jarr!![i] as JSONObject
                            tmp.put("skip", false)
                            itemList.add(tmp)
                        }
                    }else{
                        uiHandler.sendEmptyMessage(2)
                    }
                    uiHandler.sendEmptyMessage(1)
                }
            }
        })
    }


    fun resetView () {
        rangeMin.setText("0")
        rangeMax.setText("0")
        tvResult.text = ""
    }

    fun randomItem (): JSONObject? {
        val min: String = rangeMin.text.toString()
        val max: String = rangeMax.text.toString()

        var imin = if(min.toIntOrNull() == null) 0 else min.toInt()
        var imax = if(max.toIntOrNull() == null) 0 else max.toInt()

        val tmp: ArrayList<JSONObject> = ArrayList()

        for(i in 0..(itemList.size - 1)){
            val t:JSONObject = itemList[i]
            var flag:Boolean = false

            val price:Int = t!!["price"] as Int

            if(t!!["skip"] == false){
                if(imin == 0 && imax == 0){
                    flag = true
                }else if(imin > 0 && imax == 0){
                    if(price >= imin){
                        flag = true
                    }
                }else if(imin == 0 && imax > 0) {
                    if(price <= imax) {
                        flag = true
                    }
                }else{
                    if(price in imin..imax) {
                        flag = true
                    }
                }
            }

            if(flag){
                tmp.add(t)
            }
        }

        var arr: Array<JSONObject> = tmp.toTypedArray()

        if(arr.isNotEmpty()) {
            arr = shuffleArray(arr) as Array<JSONObject>
        }

        return if(arr.isNotEmpty()) {
            arr[0]
        } else {
            null
        }
    }

    fun shuffleArray(arr: Array<JSONObject>) : Array<JSONObject>{
        var tmp = arr

        var rand: Random = Random()

        var limit: Int = 0
        while (limit < 2) {
            for (i in 0..(tmp.size - 1)) {
                val pos: Int = rand.nextInt(tmp.size)
                val a = tmp[pos]
                tmp[pos] = tmp[i]
                tmp[i] = a
            }
            limit ++
        }

        return tmp
    }

    @SuppressLint("HandlerLeak")
    private val uiHandler = object : Handler() {
        override fun handleMessage(msg: Message?) {
            super.handleMessage(msg)
            when (msg!!.what) {
                1 -> {
                    // update listview data
                    adapter!!.clear()
                    adapter!!.addAll(itemList)
                }
                2 -> {
                    btnRandom.isClickable = false
                }
                3 -> {
                    btnRandom.isClickable = true
                }
            }
        }
    }

    class lvAdapter(context: Context, resource: Int) : ArrayAdapter<JSONObject>(context, resource) {

        override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
            val data = getItem(position) as JSONObject
            var v: View = if (convertView == null) {
                View.inflate(context, R.layout.listview_commodity_item, null)
            } else {
                convertView
            }

            val tvSkip: TextView = v.findViewById<TextView>(R.id.tvSkip)
            tvSkip.text = if(data!!["skip"] == false){
                context.getString(R.string.commodity_no_skip)
            }else{
                context.getString(R.string.commodity_skip)
            }

            val tv: TextView = v.findViewById(R.id.tvItem)
            val name:String = data!!["name"] as String
            val price:Int = data!!["price"] as Int
            tv.text = "${name} $${price}"
            return v
        }
    }
}