/*
 * Copyright (c) 2019 Hemanth Savarala.
 *
 * Licensed under the GNU General Public License v3
 *
 * This is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by
 *  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 */

package code.name.monkey.retromusic.util

import android.annotation.SuppressLint
import android.content.Context
import android.content.SharedPreferences
import android.graphics.Bitmap
import android.graphics.drawable.Drawable
import android.net.Uri
import android.os.AsyncTask
import android.provider.MediaStore
import android.widget.Toast
import code.name.monkey.retromusic.App
import code.name.monkey.retromusic.model.Artist
import com.bumptech.glide.Glide
import com.bumptech.glide.load.engine.DiskCacheStrategy
import com.bumptech.glide.request.target.SimpleTarget
import com.bumptech.glide.request.transition.Transition
import java.io.BufferedOutputStream
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.util.*


class CustomArtistImageUtil private constructor(context: Context) {

    private val mPreferences: SharedPreferences = context.applicationContext.getSharedPreferences(
        CUSTOM_ARTIST_IMAGE_PREFS,
        Context.MODE_PRIVATE
    )

    fun setCustomArtistImage(artist: Artist, uri: Uri) {
        Glide.with(App.getContext())
            .asBitmap()
            .load(uri)
            .diskCacheStrategy(DiskCacheStrategy.NONE)
            .skipMemoryCache(true)
            .into(object : SimpleTarget<Bitmap>() {
                override fun onLoadFailed(errorDrawable: Drawable?) {
                    super.onLoadFailed(errorDrawable)
                    Toast.makeText(App.getContext(), "Load Failed", Toast.LENGTH_LONG).show()
                }

                @SuppressLint("StaticFieldLeak")
                override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {
                    object : AsyncTask<Void, Void, Void>() {
                        override fun doInBackground(vararg params: Void): Void? {
                            val dir = File(App.getContext().filesDir, FOLDER_NAME)
                            if (!dir.exists()) {
                                if (!dir.mkdirs()) { // create the folder
                                    return null
                                }
                            }
                            val file = File(dir, getFileName(artist))

                            var succesful = false
                            try {
                                val os = BufferedOutputStream(FileOutputStream(file))
                                succesful = ImageUtil.resizeBitmap(resource, 2048)
                                    .compress(Bitmap.CompressFormat.JPEG, 100, os)
                                os.close()
                            } catch (e: IOException) {
                                Toast.makeText(App.getContext(), e.toString(), Toast.LENGTH_LONG)
                                    .show()
                            }

                            if (succesful) {
                                mPreferences.edit().putBoolean(getFileName(artist), true).apply()
                                ArtistSignatureUtil.getInstance(App.getContext())
                                    .updateArtistSignature(artist.name)
                                App.getContext().contentResolver.notifyChange(
                                    MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
                                    null
                                ) // trigger media store changed to force artist image reload
                            }
                            return null
                        }
                    }.execute()
                }
            })
    }

    @SuppressLint("StaticFieldLeak")
    fun resetCustomArtistImage(artist: Artist) {
        object : AsyncTask<Void, Void, Void>() {
            @SuppressLint("ApplySharedPref")
            override fun doInBackground(vararg params: Void): Void? {
                mPreferences.edit().putBoolean(getFileName(artist), false).commit()
                ArtistSignatureUtil.getInstance(App.getContext()).updateArtistSignature(artist.name)
                App.getContext().contentResolver.notifyChange(
                    MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
                    null
                ) // trigger media store changed to force artist image reload

                val file = getFile(artist)
                if (!file.exists()) {
                    return null
                } else {
                    file.delete()
                }
                return null
            }
        }.execute()
    }

    // shared prefs saves us many IO operations
    fun hasCustomArtistImage(artist: Artist): Boolean {
        return mPreferences.getBoolean(getFileName(artist), false)
    }

    companion object {
        private const val CUSTOM_ARTIST_IMAGE_PREFS = "custom_artist_image"
        private const val FOLDER_NAME = "/custom_artist_images/"

        private var sInstance: CustomArtistImageUtil? = null

        fun getInstance(context: Context): CustomArtistImageUtil {
            if (sInstance == null) {
                sInstance = CustomArtistImageUtil(context.applicationContext)
            }
            return sInstance!!
        }

        fun getFileName(artist: Artist): String {
            var artistName = artist.name
            // replace everything that is not a letter or a number with _
            artistName = artistName.replace("[^a-zA-Z0-9]".toRegex(), "_")
            return String.format(Locale.US, "#%d#%s.jpeg", artist.id, artistName)
        }

        @JvmStatic
        fun getFile(artist: Artist): File {
            val dir = File(App.getContext().filesDir, FOLDER_NAME)
            return File(dir, getFileName(artist))
        }
    }
}