SDPTeam15/PolyEvents

package com.github.sdpteam15.polyevents.view.adapter

import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color.*
import android.view.LayoutInflater
import android.view.View
import android.view.View.GONE
import android.view.View.VISIBLE
import android.view.ViewGroup
import android.widget.ImageButton
import android.widget.TextView
import androidx.lifecycle.LifecycleOwner
import androidx.recyclerview.widget.RecyclerView
import com.github.sdpteam15.polyevents.R
import com.github.sdpteam15.polyevents.helper.HelperFunctions.ORANGE
import com.github.sdpteam15.polyevents.model.entity.MaterialRequest
import com.github.sdpteam15.polyevents.model.entity.MaterialRequest.Status.*
import com.github.sdpteam15.polyevents.model.observable.Observable
import com.github.sdpteam15.polyevents.model.observable.ObservableList
import com.github.sdpteam15.polyevents.model.observable.ObservableMap
import com.github.sdpteam15.polyevents.view.activity.staff.StaffRequestsActivity
import java.time.format.DateTimeFormatter

/**
 * Recycler Adapter for the list of material requests for staff
 * Shows each material request information and buttons to update the material request status
 * @param context context of parent view used to inflate new views
 * @param lifecycleOwner parent to enable observables to stop observing when the lifecycle is closed
 * @param requests List of all item requests
 * @param typeToDisplay the item request category to display
 * @param itemNames map from item id to item name
 * @param userNames Username map to retrieve usernames given their userid
 * @param zoneNameFromEventId map from event id to zone names
 * @param staffId id of the current staff user
 * @param onAcceptListener listener to accept a material request assignment
 * @param onCancelListener listener to cancel an accepted material request assignment
 * @param onDeliveredListener listener to confirm the item delivery
 */
class StaffItemRequestAdapter(
    context: Context,
    lifecycleOwner: LifecycleOwner,
    private val requests: ObservableMap<StaffRequestsActivity.Companion.StaffRequestStatus, ObservableList<MaterialRequest>>,
    private val typeToDisplay: Observable<StaffRequestsActivity.Companion.StaffRequestStatus>,
    private val itemNames: ObservableMap<String, String>,
    private val userNames: ObservableMap<String, String>,
    private val zoneNameFromEventId: ObservableMap<String, String>,
    private val staffId: String?,
    private val onAcceptListener: (MaterialRequest) -> Unit,
    private val onCancelListener: (MaterialRequest) -> Unit,
    private val onDeliveredListener: (MaterialRequest) -> Unit
) : RecyclerView.Adapter<StaffItemRequestAdapter.ItemViewHolder>() {
    private val adapterLayout = LayoutInflater.from(context)

    init {

        requests.observe(lifecycleOwner) {
            notifyDataSetChanged()
        }
        itemNames.observe(lifecycleOwner) {
            notifyDataSetChanged()
        }
        typeToDisplay.observe(lifecycleOwner) {
            notifyDataSetChanged()
        }
        userNames.observe(lifecycleOwner) {
            notifyDataSetChanged()
        }
        zoneNameFromEventId.observe(lifecycleOwner) {
            notifyDataSetChanged()
        }
    }

    /**
     * adapted ViewHolder for each item
     * Takes the corresponding material request view
     * @param view the view
     */
    inner class ItemViewHolder(view: View) : RecyclerView.ViewHolder(view) {


        private val organizer = view.findViewById<TextView>(R.id.id_request_organiser)
        private val zone = view.findViewById<TextView>(R.id.id_request_zone)
        private val time = view.findViewById<TextView>(R.id.id_request_time)
        private val itemList = view.findViewById<TextView>(R.id.id_request_item_list)
        private val btnAccept = view.findViewById<ImageButton>(R.id.id_modify_request)
        private val btnCancel = view.findViewById<ImageButton>(R.id.id_delete_request)
        private val status = view.findViewById<TextView>(R.id.id_request_status)
        private val staffName = view.findViewById<TextView>(R.id.id_request_staffName)

        /**
         * Binds the values of each value of a material request to a view
         * @param request material request to bind
         */
        @SuppressLint("SetTextI18n")
        fun bind(request: MaterialRequest) {
            organizer.text = userNames[request.userId]
            zone.text = zoneNameFromEventId[request.eventId]
            time.text =
                request.time!!.format(DateTimeFormatter.ISO_LOCAL_DATE) + " " + request.time.format(
                    DateTimeFormatter.ISO_LOCAL_TIME
                ).subSequence(0, 5)
            itemList.text = request.items.map { itemNames[it.key] + " : " + it.value }
                .joinToString(separator = "\n")
            status.setTextColor(
                when (request.status) {
                    ACCEPTED -> ORANGE
                    DELIVERING -> CYAN
                    DELIVERED -> GREEN
                    RETURN_REQUESTED -> ORANGE
                    RETURNING -> CYAN
                    RETURNED -> GREEN
                    else -> BLACK
                }
            )
            status.text = request.status.toString()

            if (request.staffInChargeId == null) {
                staffName.visibility = GONE
            } else {
                staffName.text = "Staff : ${userNames[request.staffInChargeId]}"
                staffName.visibility = VISIBLE
            }


            if (request.status == ACCEPTED || request.status == RETURN_REQUESTED) {
                btnAccept.visibility = VISIBLE
                btnAccept.setOnClickListener { onAcceptListener(request) }
                btnCancel.visibility = GONE
            } else if ((request.status == DELIVERING || request.status == RETURNING) && request.staffInChargeId == staffId) {
                btnAccept.visibility = VISIBLE
                btnAccept.setOnClickListener { onDeliveredListener(request) }
                btnCancel.visibility = VISIBLE
                btnCancel.setOnClickListener { onCancelListener(request) }
            } else {
                btnAccept.visibility = GONE
                btnCancel.visibility = GONE
            }

        }
    }

    override fun onCreateViewHolder(
        parent: ViewGroup,
        viewType: Int
    ): ItemViewHolder {

        val view = adapterLayout.inflate(R.layout.card_staff_material_request, parent, false)
        return ItemViewHolder(view)
    }

    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
        val item = requests[typeToDisplay.value]!![position]
        holder.bind(item)
    }

    override fun getItemCount(): Int {
        return requests[typeToDisplay.value]?.size ?: 0
    }
}