package com.mcivicm.editablespinner;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.InputFilter;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListPopupWindow;
import android.widget.PopupWindow;
import android.widget.TextView;

import java.util.Arrays;

/**
 * 可编辑的下拉框
 */

public class EditableSpinner extends LinearLayout {

    private ImageView mPullDown;
    private EditText mTextView;
    private AdapterView.OnItemClickListener onItemClickListener;
    private TextWatcher textWatcher;
    private ListPopupWindow mPopup;
    private EditableSpinnerAdapter adapter;
    private boolean isIconUp = false;

    public EditableSpinner(Context context) {
        this(context, null, 0);
    }

    public EditableSpinner(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public EditableSpinner(Context context, AttributeSet attrs, int style) {
        super(context, attrs, style);
        init(attrs, style);
    }

    private void init(AttributeSet attrs, int style) {
        View v = LayoutInflater.from(getContext()).inflate(R.layout.view_editable_spinner, this, false);
        addView(v, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        mPullDown = (ImageView) v.findViewById(R.id.pull_down);
        mTextView = (EditText) v.findViewById(R.id.content_view);
        mTextView.addTextChangedListener(new TextChangedListener());
        mPopup = new ListPopupWindow(getContext());
        mPopup.setModal(true);
        mPopup.setDropDownGravity(Gravity.BOTTOM);
        mPopup.setAnchorView(mTextView);
        mPopup.setOnDismissListener(new DismissListener());
        mPopup.setOnItemClickListener(new ItemClickListener());
        mPullDown.setOnClickListener(new PullDownClickListener());
    }

    /**
     * 设置下拉框的点击事件
     *
     * @param onItemClickListener
     */
    public void setOnItemClickListener(AdapterView.OnItemClickListener onItemClickListener) {
        this.onItemClickListener = onItemClickListener;
    }

    /**
     * @return 视图适配器
     */
    public EditableSpinnerAdapter getAdapter() {
        return adapter;
    }

    /**
     * @param adapter 设置视图适配器
     */
    public void setAdapter(EditableSpinnerAdapter adapter) {
        this.adapter = adapter;
    }

    /**
     * @return 输入框文字
     */
    public Editable getText() {
        return mTextView.getText();
    }

    /**
     * @param text 设置输入框文字
     */
    public void setText(String text) {
        mTextView.setText(text);
    }

    /**
     * 设置下拉字符串
     *
     * @param strings
     */
    public void setDropDownStrings(String... strings) {
        adapter = new DefaultEditableSpinnerAdapter(getContext(), Arrays.asList(strings));
        mPopup.setAdapter(adapter);
    }

    /**
     * 设置提示文本
     *
     * @param string
     */
    public void setHint(String string) {
        mTextView.setHint(string);
    }

    /**
     * 设置提示颜色
     *
     * @param color
     */
    public void setHintTextColor(int color) {
        mTextView.setHintTextColor(color);
    }

    //右侧下拉箭头点击时间
    private class PullDownClickListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            mTextView.requestFocus();
            if (isIconUp) {
                mPopup.dismiss();
            } else {
                hideSoftInput();//关闭输入法
                animateArrow(true);
                showPopup();
                isIconUp = true;
            }
        }
    }

    private void showPopup() {
        mPopup.setWidth(mTextView.getWidth());
        if (mPopup.getListView() != null) {
            mPopup.getListView().setVerticalScrollBarEnabled(false);
            mPopup.getListView().setHorizontalScrollBarEnabled(false);
        }
        mPopup.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
        mPopup.show();
    }

    //旋转箭头
    private void animateArrow(boolean up) {
        float angle = up ? 180f : 0f;
        mPullDown.animate().rotation(angle).setDuration(100).start();
    }

    //下拉框点击事件
    private class ItemClickListener implements AdapterView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            mTextView.setText(EditableSpinner.this.adapter.getDisplayString(position));
            mPopup.dismiss();
            if (EditableSpinner.this.onItemClickListener != null) {
                EditableSpinner.this.onItemClickListener.onItemClick(parent, view, position, id);
            }
        }
    }

    //下拉框消失监听
    private class DismissListener implements PopupWindow.OnDismissListener {
        @Override
        public void onDismiss() {
            animateArrow(false);
            isIconUp = false;
        }
    }

    //隐藏软件盘
    private void hideSoftInput() {
        InputMethodManager imm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(getWindowToken(), 0);
    }

    /**
     * 设置文本颜色
     *
     * @param color
     */
    public void setTextColor(int color) {
        mTextView.setTextColor(color);
    }

    /**
     * 设置文本大小
     *
     * @param size
     */
    public void setTextSize(int size) {
        mTextView.setTextSize(size);
    }

    /**
     * 输入类型
     *
     * @param type
     */
    public void setInputType(int type) {
        mTextView.setInputType(type);
    }

    /**
     * 输入下拉框背景
     *
     * @param drawable
     */
    public void setPopupBackgroundDrawable(Drawable drawable) {
        mPopup.setBackgroundDrawable(drawable);
    }

    /**
     * 设置输入框的内边距
     *
     * @param left
     * @param top
     * @param right
     * @param bottom
     */
    public void setEditTextPadding(int left, int top, int right, int bottom) {
        mTextView.setPadding(left, top, right, bottom);
    }

    /**
     * 设置最大字符数
     *
     * @param maxLength
     */
    public void setEditTextMaxLength(int maxLength) {
        mTextView.setFilters(new InputFilter[]{new InputFilter.LengthFilter(maxLength)});
    }

    /**
     * 监听输入框输入完成
     */
    public void setOnAfterTextChanged(TextWatcher textWatcher){
        this.textWatcher = textWatcher;
    }

    private class TextChangedListener implements TextWatcher {

        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if(EditableSpinner.this.textWatcher != null){
                EditableSpinner.this.textWatcher.beforeTextChanged(charSequence,i,i1,i2);
            }
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if(EditableSpinner.this.textWatcher != null){
                EditableSpinner.this.textWatcher.onTextChanged(charSequence,i,i1,i2);
            }
        }

        @Override
        public void afterTextChanged(Editable editable) {
            if(EditableSpinner.this.textWatcher != null){
                EditableSpinner.this.textWatcher.afterTextChanged(editable);
            }
        }
    }
}