package com.example.accountbook.calendar

import android.content.Context
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.viewpager.widget.PagerAdapter
import androidx.viewpager2.adapter.FragmentStateAdapter
import com.example.accountbook.MainActivity
import com.example.accountbook.R
import com.example.accountbook.fragment.FragCalI1
import com.example.accountbook.fragment.FragmentCalendar
import java.util.Date

//abstract
abstract class CalendarViewFragmentAdapter(activity: AppCompatActivity): FragmentStateAdapter(activity) {
    private lateinit var calendarData: List<CalendarBean>


    override fun createFragment(position: Int): Fragment {
        return getFragment().setCalendarData(this.getCalendarData(position))
    }

    override fun getItemCount(): Int
        = Int.MAX_VALUE


    protected fun getCalendarData(position: Int): List<CalendarBean>
        = CalendarUtil.getYMD(Date()).run {
            return CalendarFactory.getMonthOfDayList(
                this[0],
                this[1] + position - Int.MAX_VALUE / 2
            )
        }

    abstract fun getFragment(): FragmentCalendar
}

abstract class CalendarViewPagerAdapter (val pageView: View, val calendarView: RecyclerView, val dateItemView: View, val context: Context): RecyclerView.Adapter<RecyclerView.ViewHolder>() {
    // member
    private val row = 7
    // input
    abstract fun bindDateViewHolder(holder: RecyclerView.ViewHolder, bean: CalendarBean)
    abstract fun bindCalendarViewHolder(holder: RecyclerView.ViewHolder, listBeans: List<CalendarBean>)


    // view Holder
    class PageViewHolder(view: View): RecyclerView.ViewHolder(view)


    // extension RecyclerView Adapter
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder
        = PageViewHolder(pageView)

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        // calendar date
        val dateArr: IntArray = CalendarUtil.getYMD(Date())
        val data = CalendarFactory.getMonthOfDayList(
            dateArr[0],
            dateArr[1] + position - Int.MAX_VALUE / 2
        )

        // etc
        bindCalendarViewHolder(holder, data)
//        val isToday: Boolean = position == Int.MAX_VALUE / 2

        calendarView.adapter = object : CalendarAdapter2(dateItemView, data) {
            override fun bindViewHolder(holder: CalendarAdapter2.ViewHolderCalendar2, bean: CalendarBean) {
                // 날짜 뷰
                bindDateViewHolder(holder, bean)
            }
        }
        calendarView.layoutManager = GridLayoutManager(context, row)
    }
}