package com.example.roomproject

import android.content.ContentProvider
import android.content.ContentUris
import android.content.ContentValues
import android.content.UriMatcher
import android.database.Cursor
import android.net.Uri
import androidx.room.Room
import com.example.roomproject.database.MusicDao
import com.example.roomproject.database.MusicDatabase

class MusicProvider : ContentProvider {

    internal var cursor: Cursor? = null
    internal var musicDao: MusicDao? = null

    init {
        URI_MATCHER.addURI(AUTHORITY, TABLE_ALBUM, ALBUM_TABLE_CODE)
        URI_MATCHER.addURI(AUTHORITY, "$TABLE_ALBUM/*" , ALBUM_ROW_CODE)
    }

    companion object {
        private val TAG = MusicProvider.javaClass.simpleName
        private val AUTHORITY = "com.example.roomproject.musicprovider"
        private val TABLE_ALBUM = "album"
        private val URI_MATCHER = UriMatcher(-1)
        private val ALBUM_TABLE_CODE = 101
        private val ALBUM_ROW_CODE = 102

    }

    constructor() {

    }


    override fun onCreate(): Boolean {
       if (context != null) {
           val musicDao = Room
               .databaseBuilder(context.applicationContext, MusicDatabase::class.java, "music_database")
               .build()
               .getMusicDao()
           return true
       }
        return false
    }


    override fun getType(uri: Uri): String? {
        when (URI_MATCHER.match(uri)) {
            ALBUM_TABLE_CODE -> return "vnd.android.cursor.dir/$AUTHORITY.$TABLE_ALBUM"
            ALBUM_ROW_CODE -> return "vnd.android.cursor.item/$AUTHORITY.$TABLE_ALBUM"
            else -> throw UnsupportedOperationException("not yet implemented")
        }
    }
    override fun query(uri: Uri, projection: Array<String>?, selection: String?,
        selectionArgs: Array<String>?, sortOrder: String?): Cursor? {

        val code = URI_MATCHER.match(uri)
        if (code != ALBUM_ROW_CODE && code != ALBUM_TABLE_CODE) return null
        if (code == ALBUM_TABLE_CODE) {
            cursor = musicDao?.getAlbumsCursor()
        } else {
            cursor = musicDao?.getAlbumsWithIdCursor(ContentUris.parseId(uri).toInt())
        }
        return cursor

    }
    override fun insert(uri: Uri, values: ContentValues?): Uri? {
        throw java.lang.UnsupportedOperationException("not yet implemented")
    }

    override fun update(
        uri: Uri, values: ContentValues?, selection: String?,
        selectionArgs: Array<String>?): Int {
        throw java.lang.UnsupportedOperationException("not yet implemented")
    }

    override fun delete(uri: Uri, selection: String?, selectionArgs: Array<String>?): Int {
        throw java.lang.UnsupportedOperationException("not yet implemented")
    }





}