package com.reactnativemultipleimagepicker

import android.content.Context
import android.widget.ImageView
import com.bumptech.glide.Glide
import com.bumptech.glide.load.resource.bitmap.CenterCrop
import com.bumptech.glide.load.resource.bitmap.RoundedCorners
import com.luck.picture.lib.engine.ImageEngine
import com.luck.picture.lib.utils.ActivityCompatHelper


/**
 * @author：luck
 * @date：2019-11-13 17:02
 * @describe：Glide加载引擎
 */
class GlideEngine private constructor() : ImageEngine {
  /**
   * 加载图片
   *
   * @param context   上下文
   * @param url       资源url
   * @param imageView 图片承载控件
   */
  override fun loadImage(context: Context, url: String, imageView: ImageView) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context)
            .load(url)
            .into(imageView)
  }

  override fun loadImage(
          context: Context,
          imageView: ImageView,
          url: String,
          maxWidth: Int,
          maxHeight: Int
  ) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context)
            .load(url)
            .override(maxWidth, maxHeight)
            .into(imageView)
  }

  /**
   * 加载相册目录封面
   *
   * @param context   上下文
   * @param url       图片路径
   * @param imageView 承载图片ImageView
   */
  override fun loadAlbumCover(context: Context, url: String, imageView: ImageView) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context)
            .asBitmap()
            .load(url)
            .override(180, 180)
            .sizeMultiplier(0.5f)
            .transform(CenterCrop(), RoundedCorners(8))
            .into(imageView)
  }

  /**
   * 加载图片列表图片
   *
   * @param context   上下文
   * @param url       图片路径
   * @param imageView 承载图片ImageView
   */
  override fun loadGridImage(context: Context, url: String, imageView: ImageView) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context)
            .load(url)
            .override(200, 200)
            .centerCrop()
            .placeholder(com.luck.picture.lib.R.drawable.ps_image_placeholder)
            .into(imageView)
  }

  override fun pauseRequests(context: Context) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context).pauseRequests()
  }

  override fun resumeRequests(context: Context) {
    if (!ActivityCompatHelper.assertValidRequest(context)) {
      return
    }
    Glide.with(context).resumeRequests()
  }

  private object InstanceHolder {
    val instance = GlideEngine()
  }

  companion object {
    fun createGlideEngine(): GlideEngine {
      return InstanceHolder.instance
    }
  }
}