package com.peachpasswords.autofill

import android.content.Context
import android.content.Intent
import android.net.Uri
import android.provider.Settings
import android.view.autofill.AutofillManager

/**
 * Whether Peach is actually the system's autofill service, and the one-time
 * offer to make it so.
 *
 * Nothing ever asked. Android does not prompt on install, so a user who never
 * goes looking in system settings has a password manager that appears to do
 * nothing on other apps' login screens — which reads as "autofill is broken",
 * not "autofill is off". June had to find the setting manually.
 *
 * Asked once and then never again: the system dialog is a full-screen list of
 * every autofill provider, and re-showing it to someone who deliberately uses a
 * different manager would be nagging.
 */
object AutofillEnablement {

    private const val PREFS = "peach_autofill"
    private const val ASKED_KEY = "asked_enable"

    fun isSupported(context: Context): Boolean =
        context.getSystemService(AutofillManager::class.java)?.isAutofillSupported == true

    fun isEnabled(context: Context): Boolean =
        context.getSystemService(AutofillManager::class.java)?.hasEnabledAutofillServices() == true

    fun shouldOffer(context: Context): Boolean =
        isSupported(context) && !isEnabled(context) && !asked(context)

    private fun asked(context: Context) =
        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).getBoolean(ASKED_KEY, false)

    fun markAsked(context: Context) {
        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
            .edit().putBoolean(ASKED_KEY, true).apply()
    }

    /**
     * The system picker, pre-selecting Peach. Callers must handle this failing
     * to resolve — some OEM builds ship no handler for it, in which case the
     * only route is the general settings screen ([fallbackIntent]).
     */
    fun requestIntent(context: Context): Intent =
        Intent(Settings.ACTION_REQUEST_SET_AUTOFILL_SERVICE)
            .setData(Uri.parse("package:${context.packageName}"))

    fun fallbackIntent(): Intent = Intent(Settings.ACTION_SETTINGS)
}