// Copyright © 2022 Olo Inc. All rights reserved.
// This software is made available under the Olo Pay SDK License (See LICENSE.md file)
package com.olopaysdkreactnative.googlepay


import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.FrameLayout
import androidx.fragment.app.Fragment
import com.facebook.react.bridge.Promise
import com.olo.olopay.googlepay.Result
import com.olo.olopay.googlepay.GooglePayContext
import com.olo.olopay.googlepay.ReadyCallback
import com.olo.olopay.googlepay.ResultCallback

class GooglePayFragment : Fragment() {
    private var _isReady = false
    private var _googlePayContext: GooglePayContext? = null
    private var _promise: Promise? = null

    var merchantName: String?
        get() = requireArguments().getString(MerchantNameKey, null)
        set(newValue) = requireArguments().putString(MerchantNameKey, newValue)

    var countryCode: String?
        get() = requireArguments().getString(CountryCodeKey, null)
        set(newValue) = requireArguments().putString(CountryCodeKey, newValue)

    var resultCallback: ReactNativeGooglePayResultCallback? = null

    private var _readyCallback: ReadyCallback? = null
    var readyCallback: ReadyCallback?
        get() = _readyCallback
        set(callback) {
            _readyCallback = callback
            if (isReady)
                onGooglePayReady(isReady)
        }

    init {
        arguments = Bundle()
    }

    val isReady: Boolean
        get() = _isReady

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
        return FrameLayout(requireActivity()).also {
            it.visibility = View.GONE
        }
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        _googlePayContext = GooglePayContext(this, ::onGooglePayReady, null, merchantName, countryCode)
    }

    fun present(currencyCode: String, amount: Int, promise: Promise) {
        _promise = promise
        _googlePayContext?.resultCallback = ResultCallback { result -> onGooglePayResult(result) }
        _googlePayContext?.present(currencyCode, amount)
    }

    private fun onGooglePayResult(result: Result) {
        if (_promise != null)
            resultCallback?.onResult(result, _promise!!)
    }

    private fun onGooglePayReady(isReady: Boolean) {
        _isReady = isReady && !countryCode.isNullOrEmpty() && !merchantName.isNullOrEmpty()
        readyCallback?.onReady(_isReady)
    }

    companion object {
        const val Tag = "com.olo.olopay.GooglePayFragment"
        private const val MerchantNameKey = "${Tag}.MerchantName"
        private const val CountryCodeKey = "${Tag}.CountryCode"
    }
}

fun interface ReactNativeGooglePayResultCallback {
    fun onResult(result: Result, promise: Promise)
}