package com.example.smart.ui.main

import android.view.LayoutInflater
import android.view.View
import androidx.activity.viewModels
import androidx.lifecycle.Observer
import com.example.basecore.BaseBindingActivity
import com.example.basecore.util.sysbar.StatusBarUtils
import com.example.smart.R
import com.example.smart.databinding.ActivityMainBinding
import com.example.smart.ui.home.BasePageFragment


class MainActivity : BaseBindingActivity() {


    private val viewModel: MainViewModel by viewModels()


    private lateinit var mPageList: ArrayList<BasePageFragment>

    private val binding by lazy {
        ActivityMainBinding.inflate(LayoutInflater.from(mContext))
    }

    override fun getRootView(): View = binding.root


    override fun initView() {
        StatusBarUtils.transparentMode(this, true, isFullScreen = true)

        viewModel.generateTab(mContext, binding.tabContainer)
        mPageList = viewModel.generatePage()

        loadRootPage()
        initData()
    }

    private fun initData() {
        val permissionList = listOf(
            "android.permission.WRITE_EXTERNAL_STORAGE",
            "android.permission.READ_PHONE_STATE",
            android.Manifest.permission.READ_EXTERNAL_STORAGE,
            android.Manifest.permission.ACCESS_FINE_LOCATION,
            android.Manifest.permission.ACCESS_COARSE_LOCATION
        )
        requestPermission(permissionList)
    }


    override fun bindDataObserver() {
        viewModel.run {
            tabProvider.homeTabObserver.observe(this@MainActivity, Observer {
                if (it.position == it.lastPosition) {

                } else {
                    showFragment(mPageList[it.position], mPageList[it.lastPosition])
                }
            })
        }
    }

    /**
     * load root page
     */
    private fun loadRootPage() {
        val transaction = supportFragmentManager.beginTransaction()
        if (!mPageList[0].isAdded) {
            transaction.add(R.id.container, mPageList[0])
            transaction.commit()
        }
    }

    /**
     * switch page
     */
    private fun showFragment(to: BasePageFragment, from: BasePageFragment) {
        val transaction = supportFragmentManager.beginTransaction()


        if (to.isAdded) {
            transaction.hide(from).show(to)
        } else {
            transaction.hide(from).add(R.id.container, to)
        }
        //fragment重建丢失
        transaction.commitAllowingStateLoss()
        //解决fragment重复添加
        supportFragmentManager.executePendingTransactions()
    }


}