package com.pitchedapps.frost

import android.os.Bundle
import android.support.design.widget.FloatingActionButton
import android.support.design.widget.Snackbar
import android.support.design.widget.TabLayout
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.app.AppCompatActivity
import android.support.v7.widget.Toolbar
import android.view.*
import android.widget.TextView
import butterknife.ButterKnife
import com.pitchedapps.frost.fragments.WebFragment
import com.pitchedapps.frost.utils.Changelog
import com.pitchedapps.frost.utils.bindView

class MainActivity : AppCompatActivity() {

    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
    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)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        ButterKnife.bind(this)
        setSupportActionBar(toolbar)
        // Create the adapter that will return a fragment for each of the three
        // primary sections of the activity.
        mSectionsPagerAdapter = SectionsPagerAdapter(supportFragmentManager)

        // Set up the ViewPager with the sections adapter.
        viewPager.adapter = mSectionsPagerAdapter
        viewPager.offscreenPageLimit = 5
        tabs.setupWithViewPager(viewPager)

        fab.setOnClickListener { view ->
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show()
        }

    }


    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        // Inflate the menu; this adds items to the action bar if it is present.
        menuInflater.inflate(R.menu.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.
        when (item.itemId) {
            R.id.action_settings -> return true
            R.id.action_changelog -> Changelog.show(this)
            else -> return super.onOptionsItemSelected(item)
        }
        return true
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    class PlaceholderFragment : Fragment() {

        override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?,
                                  savedInstanceState: Bundle?): View? {
            val rootView = inflater!!.inflate(R.layout.fragment_main, container, false)
            (rootView.findViewById(R.id.section_label) as TextView).text = getString(R.string.section_format, arguments.getInt(ARG_SECTION_NUMBER))
            return rootView
        }

        companion object {
            /**
             * The fragment argument representing the section number for this
             * fragment.
             */
            private val ARG_SECTION_NUMBER = "section_number"

            /**
             * Returns a new instance of this fragment for the given section
             * number.
             */
            fun newInstance(sectionNumber: Int): PlaceholderFragment {
                val fragment = PlaceholderFragment()
                val args = Bundle()
                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
                fragment.arguments = args
                return fragment
            }
        }
    }

    /**
     * A [FragmentPagerAdapter] that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    inner class SectionsPagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {

        override fun getItem(position: Int): Fragment {
            // getItem is called to instantiate the fragment for the given page.
            // Return a PlaceholderFragment (defined as a static inner class below).
            return WebFragment.newInstance()
        }

        override fun getCount(): Int {
            // Show 3 total pages.
            return 3
        }

        override fun getPageTitle(position: Int): CharSequence? {
            when (position) {
                0 -> return "SECTION 1"
                1 -> return "SECTION 2"
                2 -> return "SECTION 3"
            }
            return null
        }
    }
}