package com.zeapo.pwdstore.autofill

import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.os.AsyncTask
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.widget.SearchView
import androidx.core.app.NavUtils
import androidx.core.app.TaskStackBuilder
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.google.android.material.floatingactionbutton.FloatingActionButton
import com.zeapo.pwdstore.R
import java.lang.ref.WeakReference
import java.util.ArrayList

class AutofillPreferenceActivity : AppCompatActivity() {

    internal var recyclerAdapter: AutofillRecyclerAdapter? = null // let fragment have access
    private var recyclerView: RecyclerView? = null
    private var pm: PackageManager? = null

    private var recreate: Boolean = false // flag for action on up press; origin autofill dialog? different act

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

        setContentView(R.layout.autofill_recycler_view)
        recyclerView = findViewById(R.id.autofill_recycler)

        val layoutManager = LinearLayoutManager(this)
        recyclerView!!.layoutManager = layoutManager
        recyclerView!!.addItemDecoration(DividerItemDecoration(this, DividerItemDecoration.VERTICAL))

        pm = packageManager

        PopulateTask(this).execute()

        // if the preference activity was started from the autofill dialog
        recreate = false
        val extras = intent.extras
        if (extras != null) {
            recreate = true

            showDialog(extras.getString("packageName"), extras.getString("appName"), extras.getBoolean("isWeb"))
        }

        title = "Autofill Apps"

        val fab = findViewById<FloatingActionButton>(R.id.fab)
        fab.setOnClickListener { showDialog("", "", true) }
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        // Inflate the menu; this adds items to the action bar if it is present.
        menuInflater.inflate(R.menu.autofill_preference, menu)
        val searchItem = menu.findItem(R.id.action_search)
        val searchView = searchItem.actionView as SearchView

        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
            override fun onQueryTextSubmit(s: String): Boolean {
                return false
            }

            override fun onQueryTextChange(s: String): Boolean {
                if (recyclerAdapter != null) {
                    recyclerAdapter!!.filter(s)
                }
                return true
            }
        })

        return super.onCreateOptionsMenu(menu)
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        // in service, we CLEAR_TASK. then we set the recreate flag.
        // something of a hack, but w/o CLEAR_TASK, behaviour was unpredictable
        if (item.itemId == android.R.id.home) {
            val upIntent = NavUtils.getParentActivityIntent(this)
            if (recreate) {
                TaskStackBuilder.create(this)
                        .addNextIntentWithParentStack(upIntent!!)
                        .startActivities()
            } else {
                NavUtils.navigateUpTo(this, upIntent!!)
            }
            return true
        }
        return super.onOptionsItemSelected(item)
    }

    fun showDialog(packageName: String?, appName: String?, isWeb: Boolean) {
        val df = AutofillFragment()
        val args = Bundle()
        args.putString("packageName", packageName)
        args.putString("appName", appName)
        args.putBoolean("isWeb", isWeb)
        df.arguments = args
        df.show(supportFragmentManager, "autofill_dialog")
    }

    companion object {
        private class PopulateTask(activity: AutofillPreferenceActivity) : AsyncTask<Void, Void, Void>() {

            val weakReference = WeakReference<AutofillPreferenceActivity>(activity)

            override fun onPreExecute() {
                weakReference.get()?.apply {
                    runOnUiThread { findViewById<View>(R.id.progress_bar).visibility = View.VISIBLE }
                }
            }

            override fun doInBackground(vararg params: Void): Void? {
                val pm = weakReference.get()?.pm ?: return null
                val intent = Intent(Intent.ACTION_MAIN)
                intent.addCategory(Intent.CATEGORY_LAUNCHER)
                val allAppsResolveInfo = pm.queryIntentActivities(intent, 0)
                val allApps = ArrayList<AutofillRecyclerAdapter.AppInfo>()

                for (app in allAppsResolveInfo) {
                    allApps.add(AutofillRecyclerAdapter.AppInfo(app.activityInfo.packageName, app.loadLabel(pm).toString(), false, app.loadIcon(pm)))
                }

                val prefs = weakReference.get()?.getSharedPreferences("autofill_web", Context.MODE_PRIVATE)
                val prefsMap = prefs!!.all
                for (key in prefsMap.keys) {
                    try {
                        allApps.add(AutofillRecyclerAdapter.AppInfo(key, key, true, pm.getApplicationIcon("com.android.browser")))
                    } catch (e: PackageManager.NameNotFoundException) {
                        allApps.add(AutofillRecyclerAdapter.AppInfo(key, key, true, null))
                    }

                }
                weakReference.get()?.recyclerAdapter = AutofillRecyclerAdapter(allApps, weakReference.get()!!)
                return null
            }

            override fun onPostExecute(ignored: Void?) {
                weakReference.get()?.apply {
                    runOnUiThread {
                        findViewById<View>(R.id.progress_bar).visibility = View.GONE
                        recyclerView!!.adapter = recyclerAdapter
                        val extras = intent.extras
                        if (extras != null) {
                            recyclerView!!.scrollToPosition(recyclerAdapter!!.getPosition(extras.getString("appName")!!))
                        }
                    }
                }
            }
        }
    }
}