package im.angry.openeuicc.ui

import android.annotation.SuppressLint
import android.content.ClipData
import android.content.ClipboardManager
import android.os.Build
import android.os.Bundle
import android.view.LayoutInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.annotation.StringRes
import androidx.lifecycle.lifecycleScope
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.RecyclerView.ViewHolder
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
import im.angry.openeuicc.common.R
import im.angry.openeuicc.core.EuiccChannel
import im.angry.openeuicc.core.EuiccChannelManager
import im.angry.openeuicc.util.EUICC_DEFAULT_ISDR_AID
import im.angry.openeuicc.util.OpenEuiccContextMarker
import im.angry.openeuicc.util.activityToolbarInsetHandler
import im.angry.openeuicc.util.decodeHex
import im.angry.openeuicc.util.encodeHex
import im.angry.openeuicc.util.formatFreeSpace
import im.angry.openeuicc.util.mainViewPaddingInsetHandler
import im.angry.openeuicc.util.setupRootViewSystemBarInsets
import im.angry.openeuicc.util.tryParseEuiccVendorInfo
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import net.typeblog.lpac_jni.impl.PKID_GSMA_LIVE_CI
import net.typeblog.lpac_jni.impl.PKID_GSMA_TEST_CI

// https://euicc-manual.osmocom.org/docs/pki/eum/accredited.json
// ref: <https://regex101.com/r/5FFz8u>
private val RE_SAS = Regex(
    """^[A-Z]{2}-[A-Z]{2}(?:-UP)?-\d{4}T?(?:-\d+)?T?$""",
    setOf(RegexOption.IGNORE_CASE),
)

class EuiccInfoActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
    companion object {
        private val YES_NO = Pair(R.string.euicc_info_yes, R.string.euicc_info_no)
    }

    private lateinit var swipeRefresh: SwipeRefreshLayout
    private lateinit var infoList: RecyclerView

    private var logicalSlotId: Int = -1
    private var seId: EuiccChannel.SecureElementId = EuiccChannel.SecureElementId.DEFAULT

    data class Item(
        @get:StringRes
        val titleResId: Int,
        val content: String?,
        val copiedToastResId: Int? = null,
    )

    override fun onCreate(savedInstanceState: Bundle?) {
        enableEdgeToEdge()
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_euicc_info)
        setSupportActionBar(requireViewById(R.id.toolbar))
        supportActionBar!!.setDisplayHomeAsUpEnabled(true)

        swipeRefresh = requireViewById(R.id.swipe_refresh)
        infoList = requireViewById<RecyclerView>(R.id.recycler_view).also {
            it.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
            it.addItemDecoration(DividerItemDecoration(this, LinearLayoutManager.VERTICAL))
            it.adapter = EuiccInfoAdapter()
        }

        logicalSlotId = intent.getIntExtra("logicalSlotId", 0)
        seId = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            intent.getParcelableExtra("seId", EuiccChannel.SecureElementId::class.java)
        } else {
            @Suppress("DEPRECATION")
            intent.getParcelableExtra("seId")
        } ?: EuiccChannel.SecureElementId.DEFAULT

        val channelTitle = if (logicalSlotId == EuiccChannelManager.USB_CHANNEL_ID) {
            getString(R.string.channel_type_usb)
        } else {
            appContainer.customizableTextProvider.formatNonUsbChannelName(logicalSlotId)
        }

        title = getString(R.string.euicc_info_activity_title, channelTitle)

        swipeRefresh.setOnRefreshListener { refresh() }

        setupRootViewSystemBarInsets(
            window.decorView.rootView, arrayOf(
                this::activityToolbarInsetHandler,
                mainViewPaddingInsetHandler(infoList)
            )
        )
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean = when (item.itemId) {
        android.R.id.home -> {
            finish()
            true
        }

        else -> super.onOptionsItemSelected(item)
    }

    override fun onInit() {
        refresh()
    }

    private fun refresh() {
        swipeRefresh.isRefreshing = true

        lifecycleScope.launch {
            euiccChannelManager.withEuiccChannel(logicalSlotId, seId) { channel ->
                // When the chip multi-SE, we need to include seId in the title (because we don't have access
                // to hasMultipleSE in the onCreate() function, we need to do it here).
                // TODO: Move channel formatting to somewhere centralized and remove this hack. (And also, of course, add support for USB)
                if (channel.hasMultipleSE && logicalSlotId != EuiccChannelManager.USB_CHANNEL_ID) {
                    withContext(Dispatchers.Main) {
                        title =
                            appContainer.customizableTextProvider.formatNonUsbChannelNameWithSeId(logicalSlotId, seId)
                    }
                }

                val items = buildEuiccInfoItems(channel)

                withContext(Dispatchers.Main) {
                    (infoList.adapter!! as EuiccInfoAdapter).euiccInfoItems = items
                }
            }

            swipeRefresh.isRefreshing = false
        }
    }

    private fun buildEuiccInfoItems(channel: EuiccChannel) = buildList {
        add(Item(R.string.euicc_info_access_mode, channel.type))
        add(Item(R.string.euicc_info_removable, formatByBoolean(channel.port.card.isRemovable, YES_NO)))
        add(Item(R.string.euicc_info_eid, channel.lpa.eID, copiedToastResId = R.string.toast_eid_copied))
        if (!channel.isdrAid.contentEquals(EUICC_DEFAULT_ISDR_AID.decodeHex())) {
            // Only show if it's not the default ISD-R AID
            add(Item(R.string.euicc_info_isdr_aid, channel.isdrAid.encodeHex()))
        }
        channel.tryParseEuiccVendorInfo()?.let { vendorInfo ->
            // @formatter:off
            vendorInfo.skuName?.let { add(Item(R.string.euicc_info_sku, it)) }
            vendorInfo.serialNumber?.let { add(Item(R.string.euicc_info_sn, it, copiedToastResId = R.string.toast_sn_copied)) }
            vendorInfo.firmwareVersion?.let { add(Item(R.string.euicc_info_fw_ver, it)) }
            // @formatter:on
        }
        channel.lpa.euiccInfo2?.let { info ->
            add(Item(R.string.euicc_info_sgp22_version, info.sgp22Version.toString()))
            info.sasAccreditationNumber.trim().takeIf(RE_SAS::matches)
                ?.let { add(Item(R.string.euicc_info_sas_accreditation_number, it.uppercase())) }

            val nvramText = buildString {
                append(formatFreeSpace(info.freeNvram))
                append(' ')
                append(getString(R.string.euicc_info_free_nvram_hint))
            }
            add(Item(R.string.euicc_info_free_nvram, nvramText))
        }
        channel.lpa.euiccInfo2?.euiccCiPKIdListForSigning.orEmpty().let { signers ->
            // SGP.28 v1.0, eSIM CI Registration Criteria (Page 5 of 9, 2019-10-24)
            // https://www.gsma.com/newsroom/wp-content/uploads/SGP.28-v1.0.pdf#page=5
            // FS.27 v2.0, Security Guidelines for UICC Profiles (Page 25 of 27, 2024-01-30)
            // https://www.gsma.com/solutions-and-impact/technologies/security/wp-content/uploads/2024/01/FS.27-Security-Guidelines-for-UICC-Credentials-v2.0-FINAL-23-July.pdf#page=25
            val resId = when {
                signers.isEmpty() -> R.string.euicc_info_unknown // the case is not mp, but it's is not common
                PKID_GSMA_LIVE_CI.any(signers::contains) -> R.string.euicc_info_ci_gsma_live
                PKID_GSMA_TEST_CI.any(signers::contains) -> R.string.euicc_info_ci_gsma_test
                else -> R.string.euicc_info_ci_unknown
            }
            add(Item(R.string.euicc_info_ci_type, getString(resId)))
        }
        val atr = channel.atr?.encodeHex() ?: getString(R.string.euicc_info_unavailable)
        add(Item(R.string.euicc_info_atr, atr, copiedToastResId = R.string.toast_atr_copied))
    }

    @Suppress("SameParameterValue")
    private fun formatByBoolean(b: Boolean, res: Pair<Int, Int>): String =
        getString(if (b) res.first else res.second)

    inner class EuiccInfoViewHolder(root: View) : ViewHolder(root) {
        private val title: TextView = root.requireViewById(R.id.euicc_info_title)
        private val content: TextView = root.requireViewById(R.id.euicc_info_content)
        private var copiedToastResId: Int? = null

        init {
            root.setOnClickListener {
                if (copiedToastResId != null) {
                    val label = title.text.toString()
                    getSystemService(ClipboardManager::class.java)!!
                        .setPrimaryClip(ClipData.newPlainText(label, content.text))
                    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2) {
                        Toast.makeText(
                            this@EuiccInfoActivity,
                            copiedToastResId!!,
                            Toast.LENGTH_SHORT
                        ).show()
                    }
                }
            }
        }

        fun bind(item: Item) {
            copiedToastResId = item.copiedToastResId
            title.setText(item.titleResId)
            content.text = item.content ?: getString(R.string.euicc_info_unknown)
        }
    }

    inner class EuiccInfoAdapter : RecyclerView.Adapter<EuiccInfoViewHolder>() {
        var euiccInfoItems: List<Item> = listOf()
            @SuppressLint("NotifyDataSetChanged")
            set(newVal) {
                field = newVal
                notifyDataSetChanged()
            }

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

        override fun getItemCount(): Int = euiccInfoItems.size

        override fun onBindViewHolder(holder: EuiccInfoViewHolder, position: Int) {
            holder.bind(euiccInfoItems[position])
        }
    }
}