package uk.beads.manager

import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import uk.beads.manager.databinding.ActivityOrdersBinding

class OrdersActivity : AppCompatActivity() {
    private lateinit var binding: ActivityOrdersBinding
    private val adapter = OrdersAdapter { order ->
        val intent = Intent(this, OrderDetailActivity::class.java)
        intent.putExtra("order_id", order.id)
        startActivity(intent)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityOrdersBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.recyclerOrders.layoutManager = LinearLayoutManager(this)
        binding.recyclerOrders.adapter = adapter

        binding.btnLogout.setOnClickListener {
            SessionManager.clear(this)
            startActivity(Intent(this, LoginActivity::class.java))
            finish()
        }

        binding.swipeRefresh.setOnRefreshListener { loadOrders() }

        SessionInitializer.init(this) {
            runOnUiThread { loadOrders() }
        }
    }

    override fun onResume() {
        super.onResume()
        OrderPollingService.start(this)
    }

    override fun onPause() {
        super.onPause()
        OrderPollingService.stop(this)
    }

    private fun loadOrders() {
        binding.swipeRefresh.isRefreshing = true
        Thread {
            try {
                val orders = ApiClient.fetchOrders(this)
                runOnUiThread {
                    adapter.submit(orders)
                    binding.emptyText.visibility = if (orders.isEmpty()) View.VISIBLE else View.GONE
                    binding.swipeRefresh.isRefreshing = false
                }
            } catch (e: Exception) {
                runOnUiThread {
                    binding.swipeRefresh.isRefreshing = false
                    binding.emptyText.text = "Could not load orders"
                    binding.emptyText.visibility = View.VISIBLE
                }
            }
        }.start()
    }
}

class OrdersAdapter(private val onClick: (OrderDto) -> Unit) :
    RecyclerView.Adapter<OrdersAdapter.Holder>() {

    private var items: List<OrderDto> = emptyList()

    fun submit(list: List<OrderDto>) {
        items = list
        notifyDataSetChanged()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): Holder {
        val view = LayoutInflater.from(parent.context)
            .inflate(R.layout.item_order, parent, false)
        return Holder(view)
    }

    override fun getItemCount() = items.size

    override fun onBindViewHolder(holder: Holder, position: Int) {
        holder.bind(items[position], onClick)
    }

    class Holder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        private val title: TextView = itemView.findViewById(R.id.textTitle)
        private val subtitle: TextView = itemView.findViewById(R.id.textSubtitle)
        private val total: TextView = itemView.findViewById(R.id.textTotal)

        fun bind(order: OrderDto, onClick: (OrderDto) -> Unit) {
            title.text = "#${order.orderNumber}"
            subtitle.text = "${order.customer.firstName} ${order.customer.lastName}"
            total.text = "£${"%.2f".format(order.total)}"
            itemView.setOnClickListener { onClick(order) }
        }
    }
}