package cash.z.ecc.android.ui.detail

import android.view.View
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import cash.z.ecc.android.R
import cash.z.ecc.android.ext.goneIf
import cash.z.ecc.android.ext.toAppColor
import cash.z.ecc.android.ui.MainActivity
import cash.z.wallet.sdk.entity.ConfirmedTransaction
import cash.z.wallet.sdk.ext.*
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import java.nio.charset.Charset
import java.text.SimpleDateFormat
import java.util.*

class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : RecyclerView.ViewHolder(itemView) {
    private val indicator = itemView.findViewById<View>(R.id.indicator)
    private val amountText = itemView.findViewById<TextView>(R.id.text_transaction_amount)
    private val topText = itemView.findViewById<TextView>(R.id.text_transaction_top)
    private val bottomText = itemView.findViewById<TextView>(R.id.text_transaction_bottom)
    private val shieldIcon = itemView.findViewById<View>(R.id.image_shield)
    private val formatter = SimpleDateFormat("M/d h:mma", Locale.getDefault())

    fun bindTo(transaction: T?) {

        // update view
        var lineOne: String = ""
        var lineTwo: String = ""
        var amountZec: String = ""
        var amountDisplay: String = ""
        var amountColor: Int = 0
        var indicatorBackground: Int = 0

        transaction?.apply {
            itemView.setOnClickListener {
                onTransactionClicked(this)
            }
            amountZec = value.convertZatoshiToZecString()
            // TODO: these might be good extension functions
            val timestamp = formatter.format(blockTimeInSeconds * 1000L)
            val isMined = blockTimeInSeconds != 0L
            when {
                !toAddress.isNullOrEmpty() -> {
                    lineOne = "You paid ${toAddress?.toAbbreviatedAddress()}"
                    lineTwo = if (isMined) "Sent $timestamp" else "Pending confirmation"
                    amountDisplay = "- $amountZec"
                    amountColor = R.color.zcashRed
                    indicatorBackground = R.drawable.background_indicator_outbound
                }
                raw == null || raw?.isEmpty() == true -> {
                    lineOne = "Unknown paid you"
                    lineTwo = "Received $timestamp"
                    amountDisplay = "+ $amountZec"
                    amountColor = R.color.zcashGreen
                    indicatorBackground = R.drawable.background_indicator_inbound
                }
                else -> {
                    lineOne = "Unknown"
                    lineTwo = "Unknown"
                }
            }

            // sanitize amount
            if (value < ZcashSdk.MINERS_FEE_ZATOSHI) amountDisplay = "< 0.001"
            else if (amountZec.length > 10) { // 10 allows 3 digits to the left and 6 to the right of the decimal
                amountDisplay = "tap to view"
            }
        }


        topText.text = lineOne
        bottomText.text = lineTwo
        amountText.text = amountDisplay
        amountText.setTextColor(amountColor.toAppColor())
        val context = itemView.context
        indicator.background = context.resources.getDrawable(indicatorBackground)
        shieldIcon.goneIf((transaction?.raw != null || transaction?.expiryHeight != null) && !transaction?.toAddress.isShielded())
    }

    private fun onTransactionClicked(transaction: ConfirmedTransaction) {
        val txId = transaction.rawTransactionId.toTxId()
        val detailsMessage: String = "Zatoshi amount: ${transaction.value}\n\n" +
                "Transaction: $txId" +
                "${if (transaction.toAddress != null) "\n\nto: ${transaction.toAddress}" else ""}" +
                "${if (transaction.memo != null) "\n\nmemo: \n${String(transaction.memo!!, Charset.forName("UTF-8"))}" else ""}"

        MaterialAlertDialogBuilder(itemView.context)
            .setMessage(detailsMessage)
            .setTitle("Transaction Details")
            .setCancelable(true)
            .setPositiveButton("Ok") { dialog, _ ->
                dialog.dismiss()
            }
            .setNegativeButton("Copy TX") { dialog, _ ->
                (itemView.context as MainActivity).copyText(txId, "Transaction Id")
                dialog.dismiss()
            }
            .show()
    }
}

private fun ByteArray.toTxId(): String {
    val sb = StringBuilder(size * 2)
    for(i in (size - 1) downTo 0) {
        sb.append(String.format("%02x", this[i]))
    }
    return sb.toString()
}