package com.moyasarsdk.samsungpay

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.databinding.DataBindingUtil
import android.graphics.drawable.GradientDrawable
import com.moyasarsdk.databinding.FragmentSamsungPayBinding
import com.moyasarsdk.R
import com.moyasarsdk.Logger

/**
 * Fragment displaying a button to start Samsung Pay payment flow.
 */
class SamsungPayButtonFragment : Fragment() {

    private val viewModel: SamsungPayButtonViewModel = SamsungPayButtonViewModelHolder.sharedSamsungPayButtonViewModel
    private lateinit var mBinding: FragmentSamsungPayBinding

    companion object {
        fun newInstance(
            merchantInfo: MerchantInfo,
            paymentCallback: (String?, String?) -> Unit,
        ): SamsungPayButtonFragment {
            Logger.d("MoyasarSDK", "SamsungPayButtonFragment.newInstance")

            // Need to set the sharedSamsungPayButtonViewModel first thing
            SamsungPayButtonViewModelHolder.sharedSamsungPayButtonViewModel = SamsungPayButtonViewModel(merchantInfo, paymentCallback)

            return SamsungPayButtonFragment()
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        Logger.d("MoyasarSDK", "SamsungPayButtonFragment.onCreateView")

        mBinding = DataBindingUtil.inflate(
            inflater,
            R.layout.fragment_samsung_pay, container, false
        )

        initView()

        return mBinding.root
    }

    private fun enablePaymentButton() {
        mBinding.samsungPayButton.isClickable = true
        mBinding.samsungPayButton.alpha = 1f
    }

    private fun disablePaymentButton() {
        mBinding.samsungPayButton.isClickable = false
        mBinding.samsungPayButton.alpha = 0.4f
    }

    private fun initView() {
        val samsungPayButton = mBinding.samsungPayButton

         val backgroundDrawable = mBinding.samsungPayButton.background

        if (backgroundDrawable is GradientDrawable) {
            val radiusDp = (viewModel.merchantInfo.buttonBorderRadius)?.toFloat() ?: 12f
            val radiusPx = radiusDp * requireContext().resources.displayMetrics.density
            
            backgroundDrawable.cornerRadius = radiusPx
        }

        viewModel.initialize(requireContext()) { success ->
            if (success) {
                Logger.i("MoyasarSDK", "Samsung Pay ready and initialized")

                samsungPayButton.visibility = View.VISIBLE
            }
        }

        samsungPayButton.setOnClickListener {
            Logger.d("MoyasarSDK", "Samsung Pay button clicked")

            disablePaymentButton()

            viewModel.showPaymentsheet(
                requireContext(),
                onResponse = {
                    enablePaymentButton()
                }
            )
        }
    }
}