/*
 * Copyright (C) 2025 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.privatespace

import android.content.Context
import android.content.Intent
import android.net.Uri
import android.os.Environment
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.setValue
import androidx.lifecycle.ViewModel
import com.android.privatespace.filetransfer.FileTransferService
import com.android.privatespace.filetransfer.FileTransferService.Companion.DESTINATION_PATH_EXTRA
import com.android.privatespace.filetransfer.FileTransferService.Companion.KEEP_ORIGINAL_EXTRA
import com.android.privatespace.filetransfer.FileTransferService.Companion.SOURCE_URIS_EXTRA
import java.util.ArrayList

/** A ViewModel for the PrivateSpaceActivity move files feature and its dialog. */
class PrivateSpaceViewModel : ViewModel() {
    var uiState by mutableStateOf(PrivateSpaceUiState.STARTED)
        private set

    private var fileUris: List<Uri> = emptyList()

    fun showMoveFilesDialog(uris: List<Uri>) {
        fileUris = uris
        if (uris.isNotEmpty()) {
            uiState = PrivateSpaceUiState.SHOW_MOVE_FILES_DIALOG
        } else {
            // Finish if no URIs are selected.
            finishFlow()
        }
    }

    fun moveFiles(context: Context) {
        val serviceIntent = getServiceIntent(context)
        serviceIntent.putExtra(KEEP_ORIGINAL_EXTRA, false)
        context.startForegroundService(serviceIntent)
        finishFlow()
    }

    fun copyFiles(context: Context) {
        val serviceIntent = getServiceIntent(context)
        serviceIntent.putExtra(KEEP_ORIGINAL_EXTRA, true)
        context.startForegroundService(serviceIntent)
        finishFlow()
    }

    fun finishFlow() {
        uiState = PrivateSpaceUiState.FINISHED
    }

    private fun getServiceIntent(context: Context): Intent {
        val intent = Intent(context, FileTransferService::class.java)
        intent.putParcelableArrayListExtra(SOURCE_URIS_EXTRA, ArrayList(fileUris))
        intent.putExtra(DESTINATION_PATH_EXTRA, Environment.DIRECTORY_DOWNLOADS)
        return intent
    }
}