/* 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 org.mozilla.fenix.settings

import android.os.Bundle
import androidx.preference.PreferenceFragmentCompat
import androidx.preference.SwitchPreference
import org.mozilla.fenix.FeatureFlags
import org.mozilla.fenix.R
import org.mozilla.fenix.components.metrics.MetricServiceType
import org.mozilla.fenix.ext.components
import org.mozilla.fenix.ext.getPreferenceKey
import org.mozilla.fenix.ext.settings
import org.mozilla.fenix.ext.showToolbar

/**
 * Lets the user toggle telemetry on/off.
 */
class DataChoicesFragment : PreferenceFragmentCompat() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val context = requireContext()
        preferenceManager.sharedPreferences.registerOnSharedPreferenceChangeListener(this) { _, key ->
            if (key == getPreferenceKey(R.string.pref_key_telemetry)) {
                if (context.settings().isTelemetryEnabled) {
                    context.components.analytics.metrics.start(MetricServiceType.Data)
                } else {
                    context.components.analytics.metrics.stop(MetricServiceType.Data)
                }
                // Reset experiment identifiers on both opt-in and opt-out; it's likely
                // that in future we will need to pass in the new telemetry client_id
                // to this method when the user opts back in.
                context.components.analytics.experiments.resetTelemetryIdentifiers()
            } else if (key == getPreferenceKey(R.string.pref_key_marketing_telemetry)) {
                if (context.settings().isMarketingTelemetryEnabled) {
                    context.components.analytics.metrics.start(MetricServiceType.Marketing)
                } else {
                    context.components.analytics.metrics.stop(MetricServiceType.Marketing)
                }
            } else if (key == getPreferenceKey(R.string.pref_key_experimentation)) {
                val enabled = context.settings().isExperimentationEnabled
                context.components.analytics.experiments.globalUserParticipation = enabled
            }
        }
    }

    override fun onResume() {
        super.onResume()
        showToolbar(getString(R.string.preferences_data_collection))
    }

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.data_choices_preferences, rootKey)

        requirePreference<SwitchPreference>(R.string.pref_key_telemetry).apply {
            isChecked = context.settings().isTelemetryEnabled

            val appName = context.getString(R.string.app_name)
            summary = context.getString(R.string.preferences_usage_data_description, appName)

            onPreferenceChangeListener = SharedPreferenceUpdater()
        }

        requirePreference<SwitchPreference>(R.string.pref_key_marketing_telemetry).apply {
            isChecked = context.settings().isMarketingTelemetryEnabled

            val appName = context.getString(R.string.app_name)
            summary = String.format(
                context.getString(R.string.preferences_marketing_data_description),
                appName
            )

            onPreferenceChangeListener = SharedPreferenceUpdater()
        }

        requirePreference<SwitchPreference>(R.string.pref_key_experimentation).apply {
            isChecked = context.settings().isExperimentationEnabled
            isVisible = FeatureFlags.nimbusExperiments
            onPreferenceChangeListener = SharedPreferenceUpdater()
        }
    }
}