package me.nereo.multi_image_selector;

import android.content.Intent;
import android.graphics.Color;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.content.FileProvider;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

import java.io.File;
import java.util.ArrayList;

/**
 * Multi image selector
 * Created by Nereo on 2015/4/7.
 * Updated by nereo on 2016/1/19.
 * Updated by nereo on 2016/5/18.
 */
public class MultiImageSelectorActivity extends AppCompatActivity
        implements MultiImageSelectorFragment.Callback{

    // Single choice
    public static final int MODE_SINGLE = 0;
    // Multi choice
    public static final int MODE_MULTI = 1;

    /** Max image size，int，{@link #DEFAULT_IMAGE_SIZE} by default */
    public static final String EXTRA_SELECT_COUNT = "max_select_count";
    /** Select mode，{@link #MODE_MULTI} by default */
    public static final String EXTRA_SELECT_MODE = "select_count_mode";
    /** Whether show camera，true by default */
    public static final String EXTRA_SHOW_CAMERA = "show_camera";
    /** Result data set，ArrayList<String>*/
    public static final String EXTRA_RESULT = "select_result";
    /** Original data set */
    public static final String EXTRA_DEFAULT_SELECTED_LIST = "default_list";
    // Default image size
    private static final int DEFAULT_IMAGE_SIZE = 9;

    private ArrayList<String> resultList = new ArrayList<>();
    private Button mSubmitButton;
    private int mDefaultCount = DEFAULT_IMAGE_SIZE;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTheme(R.style.MIS_NO_ACTIONBAR);
        setContentView(R.layout.mis_activity_default);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            getWindow().setStatusBarColor(Color.BLACK);
        }

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        if(toolbar != null){
            setSupportActionBar(toolbar);
        }

        final ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
        }

        final Intent intent = getIntent();
        mDefaultCount = intent.getIntExtra(EXTRA_SELECT_COUNT, DEFAULT_IMAGE_SIZE);
        final int mode = intent.getIntExtra(EXTRA_SELECT_MODE, MODE_MULTI);
        final boolean isShow = intent.getBooleanExtra(EXTRA_SHOW_CAMERA, true);
        if(mode == MODE_MULTI && intent.hasExtra(EXTRA_DEFAULT_SELECTED_LIST)) {
            resultList = intent.getStringArrayListExtra(EXTRA_DEFAULT_SELECTED_LIST);
        }

        mSubmitButton = (Button) findViewById(R.id.commit);
        if(mode == MODE_MULTI){
            updateDoneText(resultList);
            mSubmitButton.setVisibility(View.VISIBLE);
            mSubmitButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if(resultList != null && resultList.size() >0){
                        // Notify success
                        Intent data = new Intent();
                        data.putStringArrayListExtra(EXTRA_RESULT, resultList);
                        setResult(RESULT_OK, data);
                    }else{
                        setResult(RESULT_CANCELED);
                    }
                    finish();
                }
            });
        }else{
            mSubmitButton.setVisibility(View.GONE);
        }

        if(savedInstanceState == null){
            Bundle bundle = new Bundle();
            bundle.putInt(MultiImageSelectorFragment.EXTRA_SELECT_COUNT, mDefaultCount);
            bundle.putInt(MultiImageSelectorFragment.EXTRA_SELECT_MODE, mode);
            bundle.putBoolean(MultiImageSelectorFragment.EXTRA_SHOW_CAMERA, isShow);
            bundle.putStringArrayList(MultiImageSelectorFragment.EXTRA_DEFAULT_SELECTED_LIST, resultList);

            getSupportFragmentManager().beginTransaction()
                    .add(R.id.image_grid, Fragment.instantiate(this, MultiImageSelectorFragment.class.getName(), bundle))
                    .commit();
        }

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                setResult(RESULT_CANCELED);
                finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * Update done button by select image data
     * @param resultList selected image data
     */
    private void updateDoneText(ArrayList<String> resultList){
        int size = 0;
        if(resultList == null || resultList.size()<=0){
            mSubmitButton.setText(R.string.mis_action_done);
            mSubmitButton.setEnabled(false);
        }else{
            size = resultList.size();
            mSubmitButton.setEnabled(true);
        }
        mSubmitButton.setText(getString(R.string.mis_action_button_string,
                getString(R.string.mis_action_done), size, mDefaultCount));
    }

    @Override
    public void onSingleImageSelected(String path) {
        Intent data = new Intent();
        resultList.add(path);
        data.putStringArrayListExtra(EXTRA_RESULT, resultList);
        setResult(RESULT_OK, data);
        finish();
    }

    @Override
    public void onImageSelected(String path) {
        if(!resultList.contains(path)) {
            resultList.add(path);
        }
        updateDoneText(resultList);
    }

    @Override
    public void onImageUnselected(String path) {
        if(resultList.contains(path)){
            resultList.remove(path);
        }
        updateDoneText(resultList);
    }

    @Override
    public void onCameraShot(File imageFile) {
        if(imageFile != null) {
            // notify system the image has change
            Uri uri;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                uri = FileProvider.getUriForFile(this, "cn.flightfeather.thirdapp.fileProvider", imageFile);
            } else {
                uri = Uri.fromFile(imageFile);
            }
            sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));

            Intent data = new Intent();
            resultList.add(imageFile.getAbsolutePath());
            data.putStringArrayListExtra(EXTRA_RESULT, resultList);
            setResult(RESULT_OK, data);
            finish();
        }
    }
}