/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package mozilla.components.feature.autofill

import android.annotation.SuppressLint
import android.content.Context
import android.content.Intent
import android.net.Uri
import android.os.Build
import android.provider.Settings
import android.view.autofill.AutofillManager
import androidx.annotation.VisibleForTesting

/**
 * Use cases for common Android Autofill tasks.
 */
@SuppressLint("NewApi") // All API calls are checked properly.
class AutofillUseCases(
    @VisibleForTesting sdkVersion: Int = Build.VERSION.SDK_INT
) {
    private val isAutofillAvailable = sdkVersion >= Build.VERSION_CODES.O

    /**
     * Returns true if Autofill is supported by the current device.
     */
    fun isSupported(context: Context): Boolean {
        if (!isAutofillAvailable) {
            return false
        }

        return context.getSystemService(AutofillManager::class.java)
            .isAutofillSupported
    }

    /**
     * Returns true if this application is providing Autofill services for the current user.
     */
    fun isEnabled(context: Context): Boolean {
        if (!isAutofillAvailable) {
            return false
        }

        return context.getSystemService(AutofillManager::class.java)
            .hasEnabledAutofillServices()
    }

    /**
     * Opens the system's autofill settings to let the user select an autofill service.
     */
    fun enable(context: Context) {
        if (!isAutofillAvailable) {
            return
        }

        val intent = Intent(Settings.ACTION_REQUEST_SET_AUTOFILL_SERVICE)
        intent.data = Uri.parse("package:${context.packageName}")
        context.startActivity(intent)
    }

    /**
     * Disables autofill if this application is providing Autofill services for the current user.
     */
    fun disable(context: Context) {
        if (!isAutofillAvailable) {
            return
        }

        context.getSystemService(AutofillManager::class.java)
            .disableAutofillServices()
    }
}
