package net.lacolaco.smileessence.activity

import android.app.ActivityManager
import android.content.Intent
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.drawable.BitmapDrawable
import android.net.Uri
import android.os.Bundle
import android.provider.MediaStore
import android.support.v4.view.ViewPager
import android.support.v7.app.AppCompatActivity
import android.support.v7.graphics.Palette
import android.text.TextUtils
import android.view.Menu
import android.view.MenuItem
import android.view.WindowManager
import kotlinx.android.synthetic.main.layout_main.*
import net.lacolaco.smileessence.Application
import net.lacolaco.smileessence.R
import net.lacolaco.smileessence.World
import net.lacolaco.smileessence.data.ExtractionWord
import net.lacolaco.smileessence.logging.Logger
import net.lacolaco.smileessence.twitter.TwitterTaskException
import net.lacolaco.smileessence.twitter.task.getTweetAsync
import net.lacolaco.smileessence.twitter.task.getUserAsync
import net.lacolaco.smileessence.util.*
import net.lacolaco.smileessence.view.DialogHelper
import net.lacolaco.smileessence.view.adapter.PageListAdapter
import net.lacolaco.smileessence.view.confirm
import net.lacolaco.smileessence.view.dialog.StatusDetailDialogFragment
import net.lacolaco.smileessence.view.dialog.UserDetailDialogFragment
import net.lacolaco.smileessence.view.page.*
import java.io.IOException
import java.io.InputStream
import java.net.URL
import java.util.regex.Pattern

class MainActivity : AppCompatActivity(), ViewPager.OnPageChangeListener {
    val world: World by lazy {
        val uri = intent.data ?: throw IllegalStateException("[BUG] data not set")
        val userIdValue = uri.getQueryParameter("user_id") ?: throw IllegalStateException("[BUG] user_id not set")
        Application.getWorld(userIdValue.toLong())
    }
    private val pagerAdapter by lazy { PageListAdapter(this) }

    private fun setSelectedPageIndex(position: Int, smooth: Boolean = true) {
        viewPager.setCurrentItem(position, smooth)
    }

    fun openHomePage() {
        setSelectedPageIndex(pagerAdapter.getIndex(HomeFragment::class.java))
    }

    fun openPostPage() {
        setSelectedPageIndex(pagerAdapter.getIndex(PostFragment::class.java))
    }

    private fun openPostPageWithImage(uri: Uri) {
        try {
            val c = contentResolver.query(uri, null, null, null, null)!!
            c.moveToFirst()
            val path = c.getString(c.getColumnIndex(MediaStore.MediaColumns.DATA))
            world.postState.beginTransaction()
                    .setMediaFilePath(path)
                    .commitWithOpen(this)
            world.notify(R.string.notice_select_image_succeeded)
            c.close()
        } catch (e: Exception) {
            e.printStackTrace()
            world.notifyError(R.string.notice_select_image_failed)
        }

    }

    fun openSearchPage(query: String) {
        val fragment = pagerAdapter.getCachedFragment(pagerAdapter.getIndex(SearchFragment::class.java)) as SearchFragment?
        if (fragment != null) {
            fragment.startSearch(query)
            setSelectedPageIndex(pagerAdapter.getIndex(SearchFragment::class.java))
        }
    }

    fun openUserListPage(listFullName: String) {
        val fragment = pagerAdapter.getCachedFragment(pagerAdapter.getIndex(UserListFragment::class.java)) as UserListFragment?
        if (fragment != null) {
            fragment.startUserList(listFullName)
            setSelectedPageIndex(pagerAdapter.getIndex(UserListFragment::class.java))
        }
    }

    private fun setTitle() {
        title = String.format("%s / %s", world.account.user.screenName, pagerAdapter.getName(viewPager.currentItem))
        val label = getString(R.string.app_name) + " - @" + world.account.user.screenName
        if (android.os.Build.VERSION.SDK_INT >= 21) {
            setTaskDescription(ActivityManager.TaskDescription(label, null, world.account.themeColor))
            window.statusBarColor = world.account.themeColor
        }

        launchBg { world.account.syncProfileAndSaveIfNecessary() }
        if (!world.account.user.profileImageUrl.startsWith("http"))
            return

        // XXX: It doesn't seem possible to change scaleType of the ImageButton to fitXY
        launchUi {
            val bitmap = bg {
                var inputStream: InputStream? = null
                try {
                    inputStream = URL(world.account.user.profileImageUrl).openStream()
                    val opt = BitmapFactory.Options()
                    opt.inPurgeable = true // GC可能にする
                    return@bg BitmapFactory.decodeStream(inputStream, null, opt)
                } catch (e: IOException) {
                    e.printStackTrace()
                    return@bg null
                } finally {
                    try {
                        inputStream?.close()
                    } catch (e: IOException) {
                        e.printStackTrace()
                    }
                }
            }.await() ?: return@launchUi

            val dScaledBitmap = bg {
                val r = 32.0 * resources.displayMetrics.density
                Bitmap.createScaledBitmap(bitmap, r.toInt(), r.toInt(), false)
            }
            val dPalette = bg { Palette.from(bitmap).generate() }

            val scaledBitmap = dScaledBitmap.await()
            toolbar.navigationIcon = BitmapDrawable(resources, scaledBitmap)

            val palette = dPalette.await()
            val swatch = if (world.account.useDarkTheme)
                palette.darkVibrantSwatch ?: palette.darkMutedSwatch ?: palette.dominantSwatch
            else
                palette.vibrantSwatch ?: palette.mutedSwatch ?: palette.dominantSwatch
            if (swatch == null) {
                Logger.info("Unable to get a theme color of @${world.account.user.screenName}")
            } else {
                //actionBar.setBackgroundDrawable(ColorDrawable(swatch.rgb))
                toolbar.setBackgroundColor(swatch.rgb)
                if (android.os.Build.VERSION.SDK_INT >= 21) {
                    window.statusBarColor = swatch.rgb
                    setTaskDescription(ActivityManager.TaskDescription(label, bitmap, swatch.rgb))
                }
                world.account.themeColor = swatch.rgb
                //launchBg { world.account.save() }
            }
        }
    }

    private fun processIntent(intent: Intent) {
        val uri = intent.getParcelableExtra<Uri>(KEY_ORIGINAL_DATA)
        if (uri != null) {
            if (uri.host == "twitter.com") {
                // /share and /intent/tweet: don't accept status parameter
                val postMatcher = TWITTER_POST_PATTERN.matcher(uri.path)
                if (postMatcher.find()) {
                    var text = uri.getQueryParameter("text") ?: ""
                    val url = uri.getQueryParameter("url")
                    if (!TextUtils.isEmpty(url))
                        text += " " + url
                    val hashtags = uri.getQueryParameter("hashtags")
                    if (!TextUtils.isEmpty(hashtags))
                        text += " " + hashtags.trim { it <= ' ' }.replace(",".toRegex(), " #")
                    val via = uri.getQueryParameter("via")
                    if (!TextUtils.isEmpty(via))
                        text += " via @" + via
                    world.postState.beginTransaction().setText(text).commitWithOpen(this)
                    return
                }
                val statusMatcher = TWITTER_STATUS_PATTERN.matcher(uri.path)
                if (statusMatcher.find()) {
                    return launchUi {
                        try {
                            val tweet = world.getTweetAsync(statusMatcher.group(1).toLong()).await()
                            DialogHelper.showDialog(world.getMainActivityOrCancel(), StatusDetailDialogFragment.newInstance(tweet))
                        } catch (e: TwitterTaskException) {
                            world.notifyError(R.string.error_intent_status_cannot_load)
                        }
                    }
                }
                val userMatcher = TWITTER_USER_PATTERN.matcher(uri.path)
                if (userMatcher.find()) {
                    return launchUi {
                        try {
                            val user = world.getUserAsync(userMatcher.group(1)).await()
                            DialogHelper.showDialog(world.getMainActivityOrCancel(), UserDetailDialogFragment.newInstance(user))
                        } catch (e: TwitterTaskException) {
                            world.notifyError(R.string.notice_error_show_user)
                        }
                    }
                }
            }
        } else when (intent.action) {
            Intent.ACTION_SEND -> {
                val type = intent.getStringExtra(KEY_ORIGINAL_TYPE)
                if (type == "text/plain") {
                    val extra = intent.extras
                    if (extra != null) {
                        var text = extra.getCharSequence(Intent.EXTRA_TEXT).toString()
                        if (!TextUtils.isEmpty(extra.getCharSequence(Intent.EXTRA_SUBJECT))) {
                            text = extra.getCharSequence(Intent.EXTRA_SUBJECT).toString() + " " + text
                        }
                        world.postState.beginTransaction().setText(text).commitWithOpen(this)
                        return
                    }
                } else if (type != null && type.startsWith("image/")) {
                    openPostPageWithImage(intent.getParcelableExtra(Intent.EXTRA_STREAM))
                }
            }
        }
    }

    // ------------------------ OVERRIDE METHODS ------------------------

    override fun onBackPressed() {
        this.finish()
    }

    override fun finish() {
        val homeIndex = pagerAdapter.getIndex(HomeFragment::class.java)
        if (viewPager.currentItem != homeIndex) {
            viewPager.setCurrentItem(homeIndex, true)
        } else {
            confirm(R.string.dialog_confirm_finish_app) { super.finish() }
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        when (requestCode) {
            REQUEST_GET_PICTURE_FROM_GALLERY -> {
                if (resultCode != RESULT_OK) {
                    Logger.error(requestCode)
                    world.notifyError(R.string.notice_select_image_failed)
                    finish()
                    return
                }
                openPostPageWithImage(data!!.data)
            }
        }
    }

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

        world.setMainActivity(this)

        // XXX
        val account = world.account
        setTheme(if (account.useDarkTheme) R.style.theme_dark else R.style.theme_light)
        setContentView(R.layout.layout_main)
        setSupportActionBar(toolbar)

        viewPager.addOnPageChangeListener(this)
        //actionBar.setDisplayHomeAsUpEnabled(true)

        // TODO: tab order?
        val args = Bundle()
        args.putLong(PageFragment.KEY_WORLD_USER_ID, account.id)
        pagerAdapter.addPage(PostFragment::class.java, getString(R.string.page_name_post), args, false)
        pagerAdapter.addPage(HomeFragment::class.java, getString(R.string.page_name_home), args, false)
        pagerAdapter.addPage(MentionsFragment::class.java, getString(R.string.page_name_mentions), args, false)
        pagerAdapter.addPage(HistoryFragment::class.java, getString(R.string.page_name_history), args, false)
        pagerAdapter.addPage(MessagesFragment::class.java, getString(R.string.page_name_messages), args, false)
        pagerAdapter.addPage(SearchFragment::class.java, getString(R.string.page_name_search), args, false)
        pagerAdapter.addPage(UserListFragment::class.java, getString(R.string.page_name_list), args, false)
        pagerAdapter.notifyDataSetChanged()
        viewPager.offscreenPageLimit = pagerAdapter.count
        viewPager.adapter = pagerAdapter
        setSelectedPageIndex(pagerAdapter.getIndex(HomeFragment::class.java), false)

        ExtractionWord.load()

        // update cache
        world.refreshListSubscriptions()
        world.refreshUserMuteList()
        world.refreshSavedSearches()

        launchUi {
            val user = try {
                world.getUserAsync(world.account.id)
            } catch (e: TwitterTaskException) {
                return@launchUi
            }
            setTitle()
        }

        // Set application title
        setTitle()

        // refresh all pages
        for (i in 0 until pagerAdapter.count) {
            val pf = pagerAdapter.getCachedFragment(i)
            if (pf != null && pf.isAdded) {
                Logger.debug(String.format("PageFragment %s is already attached; refreshing", pf.javaClass.name))
                pf.refresh()
            }
        }

        // start user stream
        world.setupStreaming()

        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        menuInflater.inflate(R.menu.main, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            android.R.id.home -> {
                val intent = Intent(this, ManageAccountsActivity::class.java)
                intent.putExtra(ManageAccountsActivity.INTENT_KEY_NOINIT, true)
                startActivity(intent)
            }
            R.id.actionbar_setting -> startActivity(Intent(this, SettingActivity::class.java))
            R.id.actionbar_edit_extraction -> startActivity(Intent(this, EditExtractionActivity::class.java))
            R.id.actionbar_aclog -> browse(world.account.user.aclogTimelineURL)
            else -> return super.onOptionsItemSelected(item)
        }
        return true
    }

    override fun onPause() {
        Logger.debug("onPause")
        super.onPause()
        world.setMainActivityActive(false)
    }

    override fun onResume() {
        Logger.debug("onResume")
        super.onResume()
        Application.currentWorld = world
        world.setMainActivityActive(true)

        // With the current releases (~ 7) of Android, onNewIntent() doesn't seem to be called
        // properly when resuming an already running Activity that has configured as
        // documentLaunchMode=intoExisting. So, as a workaround, store the actual Intent in
        // the World associated and check it in onResume() for now. See also
        // ManageAccountsActivity::goToWorld().
        val intent = world.mainActivityIntent
        if (intent != null) {
            world.mainActivityIntent = null
            processIntent(intent)
        }
    }

    // --------------------- Interface OnPageChangeListener ---------------------

    override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {}

    override fun onPageSelected(position: Int) {
        Logger.debug("Page selected: " + position)
        setTitle()
    }

    override fun onPageScrollStateChanged(state: Int) {}

    companion object {
        val REQUEST_GET_PICTURE_FROM_GALLERY = 11
        val KEY_ORIGINAL_DATA = "originalData"
        val KEY_ORIGINAL_TYPE = "originalType"
        private val TWITTER_POST_PATTERN = Pattern.compile("\\A/(intent/tweet|share)\\z", Pattern.CASE_INSENSITIVE)
        private val TWITTER_STATUS_PATTERN = Pattern.compile("\\A(?:/#!)?/(?:\\w{1,15})/status(?:es)?/(\\d+)\\z", Pattern.CASE_INSENSITIVE)
        private val TWITTER_USER_PATTERN = Pattern.compile("\\A(?:/#!)?/(\\w{1,15})/?\\z", Pattern.CASE_INSENSITIVE)

    }
}