package com.pitchedapps.frost

import android.content.Intent
import android.graphics.drawable.ColorDrawable
import android.os.Bundle
import android.support.annotation.StringRes
import android.support.design.widget.AppBarLayout
import android.support.design.widget.FloatingActionButton
import android.support.design.widget.Snackbar
import android.support.design.widget.TabLayout
import android.support.v4.app.ActivityOptionsCompat
import android.support.v4.app.Fragment
import android.support.v4.app.FragmentManager
import android.support.v4.app.FragmentPagerAdapter
import android.support.v4.view.ViewPager
import android.support.v7.widget.Toolbar
import android.view.Menu
import android.view.MenuItem
import ca.allanwang.kau.changelog.showChangelog
import ca.allanwang.kau.utils.*
import co.zsmb.materialdrawerkt.builders.Builder
import co.zsmb.materialdrawerkt.builders.accountHeader
import co.zsmb.materialdrawerkt.builders.drawer
import co.zsmb.materialdrawerkt.draweritems.badgeable.primaryItem
import co.zsmb.materialdrawerkt.draweritems.badgeable.secondaryItem
import co.zsmb.materialdrawerkt.draweritems.divider
import co.zsmb.materialdrawerkt.draweritems.profile.profile
import co.zsmb.materialdrawerkt.draweritems.profile.profileSetting
import com.crashlytics.android.answers.ContentViewEvent
import com.mikepenz.google_material_typeface_library.GoogleMaterial
import com.mikepenz.iconics.IconicsDrawable
import com.mikepenz.materialdrawer.AccountHeader
import com.mikepenz.materialdrawer.Drawer
import com.pitchedapps.frost.dbflow.loadFbCookie
import com.pitchedapps.frost.dbflow.loadFbTabs
import com.pitchedapps.frost.facebook.FbCookie
import com.pitchedapps.frost.facebook.FbCookie.switchUser
import com.pitchedapps.frost.facebook.FbTab
import com.pitchedapps.frost.facebook.PROFILE_PICTURE_URL
import com.pitchedapps.frost.fragments.WebFragment
import com.pitchedapps.frost.utils.*
import com.pitchedapps.frost.views.BadgedIcon
import com.pitchedapps.frost.web.FrostWebViewSearch
import io.reactivex.android.schedulers.AndroidSchedulers
import io.reactivex.disposables.Disposable
import io.reactivex.schedulers.Schedulers
import io.reactivex.subjects.PublishSubject
import org.jsoup.Jsoup
import java.util.concurrent.TimeUnit

class MainActivity : BaseActivity(), FrostWebViewSearch.SearchContract {

    lateinit var adapter: SectionsPagerAdapter
    val toolbar: Toolbar by bindView(R.id.toolbar)
    val viewPager: ViewPager by bindView(R.id.container)
    val fab: FloatingActionButton by bindView(R.id.fab)
    val tabs: TabLayout by bindView(R.id.tabs)
    val appBar: AppBarLayout by bindView(R.id.appbar)
    lateinit var drawer: Drawer
    lateinit var drawerHeader: AccountHeader
    var webFragmentObservable = PublishSubject.create<Int>()!!
    var lastPosition = -1
    val headerBadgeObservable = PublishSubject.create<String>()
    var hiddenSearchView: FrostWebViewSearch? = null
    var firstLoadFinished = false
        set(value) {
            L.d("First fragment load has finished")
            field = value
            if (value && hiddenSearchView == null) {
                hiddenSearchView = FrostWebViewSearch(this, this)
                currentFragment.frostWebView.addView(hiddenSearchView)
            }
        }

    companion object {
        const val FRAGMENT_REFRESH = 99
        /*
         * Possible responses from the SettingsActivity
         * after the configurations have changed
         */
        const val REQUEST_RESTART = 90909
        const val REQUEST_REFRESH = 80808
        const val REQUEST_NAV = 10101
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        if (BuildConfig.VERSION_CODE > Prefs.versionCode) {
            Prefs.versionCode = BuildConfig.VERSION_CODE
            showChangelog(R.xml.changelog, Prefs.textColor) { theme() }
        }
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)
        adapter = SectionsPagerAdapter(supportFragmentManager, loadFbTabs())
        viewPager.adapter = adapter
        viewPager.offscreenPageLimit = 5
        viewPager.addOnPageChangeListener(object : ViewPager.SimpleOnPageChangeListener() {
            override fun onPageSelected(position: Int) {
                super.onPageSelected(position)
                if (lastPosition == position) return
                if (lastPosition != -1) webFragmentObservable.onNext(-(lastPosition + 1))
                webFragmentObservable.onNext(position)
                lastPosition = position
            }

            override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
                super.onPageScrolled(position, positionOffset, positionOffsetPixels)
                val delta: Float by lazy { positionOffset * (255 - 128).toFloat() }
                tabsForEachView {
                    tabPosition, view ->
                    view.setAllAlpha(when (tabPosition) {
                        position -> 255.0f - delta
                        position + 1 -> 128.0f + delta
                        else -> 128f
                    })
                }
            }
        })
        viewPager.post { webFragmentObservable.onNext(0); lastPosition = 0 } //trigger hook so title is set
        setupDrawer(savedInstanceState)
        setupTabs()
        fab.setOnClickListener { view ->
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show()
        }
        setFrostColors(toolbar, themeWindow = false, headers = arrayOf(tabs, appBar), backgrounds = arrayOf(viewPager))
    }

    fun tabsForEachView(action: (position: Int, view: BadgedIcon) -> Unit) {
        (0 until tabs.tabCount).asSequence().forEach {
            i ->
            action(i, tabs.getTabAt(i)!!.customView as BadgedIcon)
        }
    }

    fun setupTabs() {
        viewPager.addOnPageChangeListener(TabLayout.TabLayoutOnPageChangeListener(tabs))
        tabs.addOnTabSelectedListener(object : TabLayout.ViewPagerOnTabSelectedListener(viewPager) {
            override fun onTabReselected(tab: TabLayout.Tab) {
                super.onTabReselected(tab)
                currentFragment.web.scrollOrRefresh()
            }

            override fun onTabSelected(tab: TabLayout.Tab) {
                super.onTabSelected(tab)
                (tab.customView as BadgedIcon).badgeText = null
            }
        })
        headerBadgeObservable.throttleFirst(15, TimeUnit.SECONDS).subscribeOn(Schedulers.newThread())
                .map { Jsoup.parse(it) }
                .filter { it.select("[data-sigil=count]").size >= 0 } //ensure headers exist
                .map {
                    val feed = it.select("[data-sigil*=feed] [data-sigil=count]")
                    val requests = it.select("[data-sigil*=requests] [data-sigil=count]")
                    val messages = it.select("[data-sigil*=messages] [data-sigil=count]")
                    val notifications = it.select("[data-sigil*=notifications] [data-sigil=count]")
                    return@map arrayOf(feed, requests, messages, notifications).map { it?.getOrNull(0)?.ownText() }
                }
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe {
                    (feed, requests, messages, notifications) ->
                    tabsForEachView {
                        _, view ->
                        when (view.iicon) {
                            FbTab.FEED.icon -> view.badgeText = feed
                            FbTab.FRIENDS.icon -> view.badgeText = requests
                            FbTab.MESSAGES.icon -> view.badgeText = messages
                            FbTab.NOTIFICATIONS.icon -> view.badgeText = notifications
                        }
                    }
                }
        adapter.pages.forEach {
            tabs.addTab(tabs.newTab()
                    .setCustomView(BadgedIcon(this).apply {
                        iicon = it.icon
                    }))
        }
    }

    fun setupDrawer(savedInstanceState: Bundle?) {
        val navBg = Prefs.bgColor.withMinAlpha(200).toLong()
        val navHeader = Prefs.headerColor.withMinAlpha(200)
        drawer = drawer {
            toolbar = this@MainActivity.toolbar
            savedInstance = savedInstanceState
            translucentStatusBar = false
            sliderBackgroundColor = navBg
            drawerHeader = accountHeader {
                textColor = Prefs.iconColor.toLong()
                backgroundDrawable = ColorDrawable(navHeader)
                selectionSecondLineShown = false
                paddingBelow = false
                cookies().forEach { (id, name) ->
                    profile(name = name ?: "") {
                        iconUrl = PROFILE_PICTURE_URL(id)
                        textColor = Prefs.textColor.toLong()
                        selectedTextColor = Prefs.textColor.toLong()
                        selectedColor = 0x00000001.toLong()
                        identifier = id
                    }
                }
                profileSetting(nameRes = R.string.kau_logout) {
                    iicon = GoogleMaterial.Icon.gmd_exit_to_app
                    iconColor = Prefs.textColor.toLong()
                    textColor = Prefs.textColor.toLong()
                    identifier = -2L
                }
                profileSetting(nameRes = R.string.kau_add_account) {
                    iconDrawable = IconicsDrawable(this@MainActivity, GoogleMaterial.Icon.gmd_add).actionBar().paddingDp(5).color(Prefs.textColor)
                    textColor = Prefs.textColor.toLong()
                    identifier = -3L
                }
                profileSetting(nameRes = R.string.kau_manage_account) {
                    iicon = GoogleMaterial.Icon.gmd_settings
                    iconColor = Prefs.textColor.toLong()
                    textColor = Prefs.textColor.toLong()
                    identifier = -4L
                }
                onProfileChanged { _, profile, current ->
                    if (current) launchWebOverlay(FbTab.PROFILE.url)
                    else when (profile.identifier) {
                        -2L -> {
                            val currentCookie = loadFbCookie(Prefs.userId)
                            if (currentCookie == null) {
                                toast(R.string.account_not_found)
                                FbCookie.reset { launchLogin(cookies(), true) }
                            } else {
                                materialDialogThemed {
                                    title(R.string.kau_logout)
                                    content(String.format(string(R.string.kau_logout_confirm_as_x), currentCookie.name ?: Prefs.userId.toString()))
                                    positiveText(R.string.kau_yes)
                                    negativeText(R.string.kau_no)
                                    onPositive { _, _ ->
                                        FbCookie.logout(Prefs.userId) {
                                            val allCookies = cookies()
                                            allCookies.remove(currentCookie)
                                            launchLogin(allCookies, true)
                                        }
                                    }
                                }
                            }
                        }
                        -3L -> launchNewTask(LoginActivity::class.java, clearStack = false)
                        -4L -> launchNewTask(SelectorActivity::class.java, cookies(), false)
                        else -> {
                            switchUser(profile.identifier, { refreshAll() })
                            tabsForEachView { _, view -> view.badgeText = null }
                        }
                    }
                    false
                }
            }
            drawerHeader.setActiveProfile(Prefs.userId)
            primaryFrostItem(FbTab.FEED_MOST_RECENT)
            primaryFrostItem(FbTab.FEED_TOP_STORIES)
            primaryFrostItem(FbTab.ACTIVITY_LOG)
            divider()
            primaryFrostItem(FbTab.PHOTOS)
            primaryFrostItem(FbTab.GROUPS)
            primaryFrostItem(FbTab.PAGES)
            divider()
            primaryFrostItem(FbTab.EVENTS)
            primaryFrostItem(FbTab.BIRTHDAYS)
            primaryFrostItem(FbTab.ON_THIS_DAY)
            divider()
            primaryFrostItem(FbTab.NOTES)
            primaryFrostItem(FbTab.SAVED)
        }
    }

    fun Builder.primaryFrostItem(item: FbTab) = this.primaryItem(item.titleId) {
        iicon = item.icon
        iconColor = Prefs.textColor.toLong()
        textColor = Prefs.textColor.toLong()
        selectedIconColor = Prefs.textColor.toLong()
        selectedTextColor = Prefs.textColor.toLong()
        selectedColor = 0x00000001.toLong()
        identifier = item.titleId.toLong()
        onClick { _ ->
            frostAnswers {
                logContentView(ContentViewEvent()
                        .putContentName(item.name)
                        .putContentType("drawer_item"))
            }
            launchWebOverlay(item.url)
            false
        }
    }

    fun Builder.secondaryFrostItem(@StringRes title: Int, onClick: () -> Unit) = this.secondaryItem(title) {
        textColor = Prefs.textColor.toLong()
        selectedIconColor = Prefs.textColor.toLong()
        selectedTextColor = Prefs.textColor.toLong()
        selectedColor = 0x00000001.toLong()
        identifier = title.toLong()
        onClick { _ -> onClick(); false }
    }


    /**
     * Something happened where the normal search function won't work
     * Fallback to overlay style
     */
    override fun searchOverlayError() {
        hiddenSearchView = null
        //todo remove true searchview and add contract
    }

    //todo add args
    override fun emitSearchResponse() {

    }

    fun refreshAll() {
        webFragmentObservable.onNext(FRAGMENT_REFRESH)
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        menuInflater.inflate(R.menu.menu_main, menu)
        toolbar.tint(Prefs.iconColor)
        setMenuIcons(menu, Prefs.iconColor,
                R.id.action_settings to GoogleMaterial.Icon.gmd_settings)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            R.id.action_settings -> {
                val intent = Intent(this, SettingsActivity::class.java)
                val bundle = ActivityOptionsCompat.makeCustomAnimation(this, R.anim.kau_slide_in_right, R.anim.kau_fade_out).toBundle()
                startActivityForResult(intent, 99, bundle)
            }
            else -> return super.onOptionsItemSelected(item)
        }
        return true
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        when (requestCode) {
            REQUEST_RESTART -> restart()
            REQUEST_REFRESH -> webFragmentObservable.onNext(FRAGMENT_REFRESH)
            REQUEST_NAV -> frostNavigationBar()
        }
    }

    override fun onResume() {
        super.onResume()
        FbCookie.switchBackUser { }
    }

    override fun onBackPressed() {
        if (currentFragment.onBackPressed()) return
        super.onBackPressed()
    }

    val currentFragment
        get() = supportFragmentManager.findFragmentByTag("android:switcher:${R.id.container}:${viewPager.currentItem}") as WebFragment

    inner class SectionsPagerAdapter(fm: FragmentManager, val pages: List<FbTab>) : FragmentPagerAdapter(fm) {

        override fun getItem(position: Int): Fragment {
            val fragment = WebFragment(pages[position], position)
            //If first load hasn't occurred, add a listener
            if (!firstLoadFinished) {
                var disposable: Disposable? = null
                fragment.post {
                    disposable = it.web.refreshObservable.subscribe {
                        if (!it) {
                            //Ensure first load finisher only happens once
                            if (!firstLoadFinished) firstLoadFinished = true
                            disposable?.dispose()
                            disposable = null
                        }
                    }
                }
            }
            return fragment
        }

        override fun getCount() = pages.size

        override fun getPageTitle(position: Int): CharSequence = getString(pages[position].titleId)
    }

}