/**
 * ProjectLaogai
 *
 * Copyright 2019  <seil0@mosad.xyz>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 */

package org.mosad.seil0.projectlaogai

import android.graphics.Color
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import androidx.appcompat.app.ActionBarDrawerToggle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.GravityCompat
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentTransaction
import com.afollestad.aesthetic.Aesthetic
import com.google.android.material.navigation.NavigationView
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.app_bar_main.*
import org.mosad.seil0.projectlaogai.controller.CacheController
import org.mosad.seil0.projectlaogai.controller.CacheController.Companion.mensaMenu
import org.mosad.seil0.projectlaogai.controller.PreferencesController
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cColorAccent
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cColorPrimary
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cCourse
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.coursesCacheTime
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.mensaCacheTime
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.timetableCacheTime
import org.mosad.seil0.projectlaogai.controller.TCoRAPIController
import org.mosad.seil0.projectlaogai.fragments.*
import java.util.*
import kotlin.system.measureTimeMillis

class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {

    private var activeFragment: Fragment = HomeFragment() // the currently active fragment, home at the start

    override fun onCreate(savedInstanceState: Bundle?) {
        Aesthetic.attach(this)
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)

        // load mensa, timetable and color
        load()
        initAesthetic()

        //init home fragment
        val fragmentTransaction: FragmentTransaction = supportFragmentManager.beginTransaction()
        fragmentTransaction.replace(R.id.fragment_container, activeFragment)
        fragmentTransaction.commit()

        val toggle = ActionBarDrawerToggle(
            this, drawer_layout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close
        )
        drawer_layout.addDrawerListener(toggle)
        toggle.syncState()

        nav_view.setNavigationItemSelectedListener(this)
    }

    override fun onResume() {
        super.onResume()
        Aesthetic.resume(this)
    }

    override fun onPause() {
        super.onPause()
        Aesthetic.pause(this)
    }

    override fun onBackPressed() {
        if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
            drawer_layout.closeDrawer(GravityCompat.START)
        } else {
            super.onBackPressed()
        }
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        // Inflate the menu; this adds items to the action bar if it is present.
        menuInflater.inflate(R.menu.main, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        return when (item.itemId) {
            R.id.action_settings -> true
            else -> super.onOptionsItemSelected(item)
        }
    }

    override fun onNavigationItemSelected(item: MenuItem): Boolean {
        // Handle navigation view item clicks here.
        activeFragment = when(item.itemId) {
            R.id.nav_home -> HomeFragment()
            R.id.nav_mensa -> MensaFragment()
            R.id.nav_timetable -> TimeTableFragment()
            R.id.nav_moodle -> MoodleFragment()
            R.id.nav_settings -> SettingsFragment()
            else -> HomeFragment()
        }

        val fragmentTransaction: FragmentTransaction = supportFragmentManager.beginTransaction()
        fragmentTransaction.replace(R.id.fragment_container, activeFragment)
        fragmentTransaction.commit()

        drawer_layout.closeDrawer(GravityCompat.START)

        return true
    }

    /**
     * load the mensa menus of the current week
     */
    private fun load() {
        val startupTime = measureTimeMillis {
            // load the settings
            PreferencesController.load(this) // this must be finished before doing anything else

            val tcor = TCoRAPIController(this)
            val currentTime = System.currentTimeMillis() / 1000
            val currentDay = Calendar.getInstance().get(Calendar.DAY_OF_WEEK)
            val cal = Calendar.getInstance()


            // TODO this will backfire if someone has to update before the server finished updating the timetable at 0001/0101
            // timetable sunday workaround
            cal.time = Date(timetableCacheTime * 1000)

            // update blocking if a) it`s monday and the last cache was not on a monday or b) the cache is older than 6 days
            if((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY) || currentTime - timetableCacheTime > 518400) {
                println("updating timetable after sunday!")
                val jobA = TCoRAPIController.getTimetable(cCourse.courseName, 0, this)
                val jobB = TCoRAPIController.getTimetable(cCourse.courseName, 1, this)

                jobA.get()
                jobB.get()
            }


            // new sunday bug fix
            CacheController.readMensa(this)
            cal.time = Date(mensaMenu.meta.updateTime * 1000)

            // if it's monday and the last cache update was on sunday or is older than 24hr, update blocking
            if ((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) || currentTime - mensaMenu.meta.updateTime > 86400) {
                println("update mensa blocking")
                TCoRAPIController.getMensa(this).get()
            }

            // get the cached files
            val cache = CacheController(this)
            cache.readStartCache(cCourse.courseName)

            // check if an update is necessary
            if(currentTime - coursesCacheTime > 86400)
                tcor.getCoursesList()

            if(currentTime - mensaCacheTime > 10800)
                TCoRAPIController.getMensa(this)

            if(currentTime - timetableCacheTime > 10800) {
                TCoRAPIController.getTimetable(cCourse.courseName, 0, this)
                TCoRAPIController.getTimetable(cCourse.courseName, 1, this)
            }

        }
        println("startup completed in $startupTime ms")
    }

    private fun initAesthetic() {
        // If we haven't set any defaults, do that now
        if (Aesthetic.isFirstTime) {
            // this is executed on the first app start, use this to show tutorial etc.
            Aesthetic.config {
                activityTheme(R.style.AppTheme)
                colorPrimary(Color.BLACK)
                colorPrimaryDark(Color.BLACK)
                colorAccent(Color.parseColor("#3f51b5"))
                apply()
            }

            SettingsFragment().selectCourse(this)
        } else {
            Aesthetic.config {
//                activityTheme(R.style.AppTheme_Light)
                colorPrimary(cColorPrimary)
                colorPrimaryDark(cColorPrimary)
                colorAccent(cColorAccent)
                apply()
            }
        }
    }

}