/*
 * This file is part of GNU Taler
 * (C) 2020 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.wallet.transactions

import android.os.Bundle
import android.text.SpannableString
import android.text.style.UnderlineSpan
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.widget.TextView
import androidx.annotation.StringRes
import androidx.fragment.app.Fragment
import androidx.fragment.app.activityViewModels
import androidx.navigation.fragment.findNavController
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import kotlinx.serialization.json.Json
import net.taler.common.Amount
import net.taler.wallet.MainViewModel
import net.taler.wallet.R
import net.taler.wallet.backend.TalerErrorInfo
import net.taler.wallet.compose.copyToClipBoard
import net.taler.wallet.getAttrColor
import net.taler.wallet.launchInAppBrowser

abstract class TransactionDetailFragment : Fragment() {

    private val model: MainViewModel by activityViewModels()
    val transactionManager by lazy { model.transactionManager }
    val devMode by lazy { model.devMode }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setHasOptionsMenu(model.devMode.value == true)
    }

    @Deprecated("Deprecated in Java")
    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
        transactionManager.selectedTransaction.observe(viewLifecycleOwner) {
            requireActivity().apply {
                it?.generalTitleRes?.let {
                    title = getString(it)
                }
            }
        }
    }

    @Deprecated("Deprecated in Java")
    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        inflater.inflate(R.menu.transactions_detail, menu)
    }

    @Deprecated("Deprecated in Java")
    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return when (item.itemId) {
            else -> super.onOptionsItemSelected(item)
        }
    }

    protected fun bindOrderAndFee(
        orderSummaryView: TextView,
        orderAmountView: TextView,
        orderIdView: TextView,
        feeView: TextView,
        info: TransactionInfo,
        raw: Amount,
        fee: Amount,
    ) {
        orderAmountView.text = raw.toString()
        feeView.text = getString(R.string.amount_negative, fee.toString())
        orderSummaryView.text = if (info.fulfillmentMessage == null) {
            info.summary
        } else {
            "${info.summary}\n\n${info.fulfillmentMessage}"
        }
        if (info.fulfillmentUrl?.startsWith("http", ignoreCase = true) == true) {
            val content = SpannableString(info.summary)
            content.setSpan(UnderlineSpan(), 0, info.summary.length, 0)
            orderSummaryView.text = content
            orderSummaryView.setTextColor(requireContext().getAttrColor(android.R.attr.textColorLink))
            orderSummaryView.setOnClickListener {
                launchInAppBrowser(requireContext(), info.fulfillmentUrl)
            }
        }
        orderIdView.text = getString(R.string.transaction_order_id, info.orderId)
    }

    @StringRes
    protected open val deleteDialogTitle = R.string.transactions_delete
    @StringRes
    protected open val deleteDialogMessage = R.string.transactions_delete_dialog_message
    @StringRes
    protected open val deleteDialogButton = R.string.transactions_delete

    protected fun onDeleteButtonClicked(t: Transaction) {
        MaterialAlertDialogBuilder(requireContext(), R.style.MaterialAlertDialog_Material3)
            .setTitle(deleteDialogTitle)
            .setMessage(deleteDialogMessage)
            .setNeutralButton(R.string.cancel) { dialog, _ ->
                dialog.cancel()
            }
            .setNegativeButton(deleteDialogButton) { dialog, _ ->
                deleteTransaction(t)
                dialog.dismiss()
            }
            .show()
    }

    private fun deleteTransaction(t: Transaction) {
        transactionManager.deleteTransaction(t.transactionId)
        findNavController().popBackStack()
    }

    private val json = Json { prettyPrint = true }

    protected fun onShowErrorButtonClicked(t: Transaction) {
        t.error?.let { err ->
            val message = json.encodeToString(TalerErrorInfo.serializer(), err)
            MaterialAlertDialogBuilder(requireContext(), R.style.MaterialAlertDialog_Material3)
                .setTitle(getString(R.string.nav_error))
                .setMessage(message)
                .setNeutralButton(R.string.close) { dialog, _ ->
                    dialog.cancel()
                }
                .setPositiveButton(R.string.copy) { _, _ ->
                    copyToClipBoard(
                        requireContext(),
                        getString(R.string.nav_error),
                        message,
                    )
                }
                .show()
        }
    }

}