package com.github.nukc.amountview;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * 自定义组件：购买数量，带减少增加按钮
 * Created by C on 2015/7/22.
 */
public class AmountView extends LinearLayout implements View.OnClickListener {

    private int amount = 1; //购买数量
    private int goods_storage = 1; //商品库存

    private OnAmountChangeListener mListener;

    private TextView tvAmount;
    private Button btnDecrease;
    private Button btnIncrease;

    public AmountView(Context context) {
        this(context, null);
    }

    public AmountView(Context context, AttributeSet attrs) {
        super(context, attrs);

        LayoutInflater.from(context).inflate(R.layout.view_amount, this);
        tvAmount = (TextView) findViewById(R.id.tvAmount);
        btnDecrease = (Button) findViewById(R.id.btnDecrease);
        btnIncrease = (Button) findViewById(R.id.btnIncrease);
        btnDecrease.setOnClickListener(this);
        btnIncrease.setOnClickListener(this);

        TypedArray obtainStyledAttributes = getContext().obtainStyledAttributes(attrs, R.styleable.AmountView);
        int btnWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnWidth, LayoutParams.WRAP_CONTENT);
        int tvWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvWidth, 80);
        int tvTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvTextSize, 0);
        int btnTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnTextSize, 0);
        obtainStyledAttributes.recycle();

        LayoutParams btnParams = new LayoutParams(btnWidth, LayoutParams.MATCH_PARENT);
        btnDecrease.setLayoutParams(btnParams);
        btnIncrease.setLayoutParams(btnParams);
        if (btnTextSize != 0) {
            btnDecrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize);
            btnIncrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize);
        }

        LayoutParams textParams = new LayoutParams(tvWidth, LayoutParams.MATCH_PARENT);
        tvAmount.setLayoutParams(textParams);
        if (tvTextSize != 0) {
            tvAmount.setTextSize(tvTextSize);
        }
    }

    public void setListener(Object object){
        this.mListener = (OnAmountChangeListener) object;
    }

    public void setGoods_storage(int goods_storage) {
        this.goods_storage = goods_storage;
    }

    @Override
    public void onClick(View v) {
        int i = v.getId();
        if (i == R.id.btnDecrease) {
            if (amount > 1) {
                amount--;
                tvAmount.setText(amount + "");
            }
        } else if (i == R.id.btnIncrease) {
            if (amount < goods_storage) {
                amount++;
                tvAmount.setText(amount + "");
            }
        }

        if(mListener != null) {
            mListener.onAmountChange(this, amount);
        }
    }


    public interface OnAmountChangeListener{
        void onAmountChange(View view, int amount);
    }

}
