package org.thoughtcrime.securesms.conversation.v2

import android.content.Intent
import android.os.Bundle
import androidx.annotation.DrawableRes
import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ExperimentalLayoutApi
import androidx.compose.foundation.layout.FlowRow
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.aspectRatio
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.pager.HorizontalPager
import androidx.compose.foundation.pager.PagerState
import androidx.compose.foundation.pager.rememberPagerState
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.Divider
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.LocalTextStyle
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.livedata.observeAsState
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.viewinterop.AndroidView
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import com.bumptech.glide.integration.compose.ExperimentalGlideComposeApi
import com.bumptech.glide.integration.compose.GlideImage
import dagger.hilt.android.AndroidEntryPoint
import kotlinx.coroutines.launch
import network.loki.messenger.R
import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
import org.session.libsession.utilities.Util
import org.session.libsession.utilities.recipients.Recipient
import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
import org.thoughtcrime.securesms.components.ProfilePictureView
import org.thoughtcrime.securesms.database.AttachmentDatabase
import org.thoughtcrime.securesms.database.Storage
import org.thoughtcrime.securesms.database.model.MessageRecord
import org.thoughtcrime.securesms.database.model.MmsMessageRecord
import org.thoughtcrime.securesms.dependencies.DatabaseComponent
import org.thoughtcrime.securesms.mms.Slide
import org.thoughtcrime.securesms.ui.AppTheme
import org.thoughtcrime.securesms.ui.Cell
import org.thoughtcrime.securesms.ui.CellNoMargin
import org.thoughtcrime.securesms.ui.CellWithPaddingAndMargin
import org.thoughtcrime.securesms.ui.ItemButton
import org.thoughtcrime.securesms.ui.LocalExtraColors
import org.thoughtcrime.securesms.ui.SessionHorizontalPagerIndicator
import org.thoughtcrime.securesms.ui.colorDestructive
import org.thoughtcrime.securesms.ui.destructiveButtonColors
import java.util.*
import java.util.concurrent.TimeUnit
import javax.inject.Inject


@AndroidEntryPoint
class MessageDetailActivity : PassphraseRequiredActionBarActivity() {

    private var timestamp: Long = 0L

    var messageRecord: MessageRecord? = null

    @Inject
    lateinit var storage: Storage

    companion object {
        // Extras
        const val MESSAGE_TIMESTAMP = "message_timestamp"

        const val ON_REPLY = 1
        const val ON_RESEND = 2
        const val ON_DELETE = 3
    }

    val viewModel = MessageDetailsViewModel()

    class MessageDetailsViewModel : ViewModel() {
        @Inject
        lateinit var attachmentDb: AttachmentDatabase

        fun setMessageRecord(value: MessageRecord?, error: String?) {
            val mmsRecord = value as? MmsMessageRecord

            val slides: List<Slide> = mmsRecord?.slideDeck?.thumbnailSlides?.toList() ?: emptyList()

            _details.value = value?.run {
                MessageDetails(
                    attachments = slides.map { slide ->
                        val duration = slide.takeIf { it.hasAudio() }
                            ?.let { it.asAttachment() as? DatabaseAttachment }
                            ?.let { attachment ->
                                attachmentDb.getAttachmentAudioExtras(attachment.attachmentId)
                                    ?.let { audioExtras ->
                                        audioExtras.durationMs.takeIf { it > 0 }?.let {
                                            String.format(
                                                "%01d:%02d",
                                                TimeUnit.MILLISECONDS.toMinutes(it),
                                                TimeUnit.MILLISECONDS.toSeconds(it) % 60
                                            )
                                        }
                                    }
                            }

                        val details = slide.run {
                            listOfNotNull(
                                fileName.orNull()?.let { TitledText("File Id:", it) },
                                TitledText("File Type:", asAttachment().contentType),
                                TitledText("File Size:", Util.getPrettyFileSize(fileSize)),
                                if (slide.hasImage()) {
                                    TitledText(
                                        "Resolution:",
                                        slide.asAttachment().run { "${width}x$height" })
                                } else null,
                                duration?.let { TitledText("Duration:", it) },
                            )
                        }
                        Attachment(slide, details)
                    },
                    sent = dateSent.let(::Date).toString().let { TitledText("Sent:", it) },
                    received = dateReceived.let(::Date).toString()
                        .let { TitledText("Received:", it) },
                    error = error?.let { TitledText("Error:", it) },
                    senderInfo = individualRecipient.run {
                        name?.let {
                            TitledText(
                                it,
                                address.serialize()
                            )
                        }
                    },
                    sender = individualRecipient
                )
            }
        }

        private var _details = MutableLiveData(MessageDetails())
        val details: LiveData<MessageDetails> = _details
    }

    override fun onCreate(savedInstanceState: Bundle?, ready: Boolean) {
        super.onCreate(savedInstanceState, ready)

        timestamp = intent.getLongExtra(MESSAGE_TIMESTAMP, -1L)

        messageRecord =
            DatabaseComponent.get(this).mmsSmsDatabase().getMessageForTimestamp(timestamp) ?: run {
                finish()
                return
            }

        val error = DatabaseComponent.get(this).lokiMessageDatabase()
            .getErrorMessage(messageRecord!!.getId())

        viewModel.setMessageRecord(messageRecord, error)

        title = resources.getString(R.string.conversation_context__menu_message_details)

        setContentView(ComposeView(this).apply {
            setContent {
                MessageDetailsScreen()
            }
        })
    }

    @Composable
    private fun MessageDetailsScreen() {
        val details by viewModel.details.observeAsState(MessageDetails())
        MessageDetails(
            details,
            onReply = { setResultAndFinish(ON_REPLY) },
            onResend = { setResultAndFinish(ON_RESEND) },
            onDelete = { setResultAndFinish(ON_DELETE) }
        )
    }

    private fun setResultAndFinish(code: Int) {
        Bundle().apply { putLong(MESSAGE_TIMESTAMP, timestamp) }
            .let(Intent()::putExtras)
            .let { setResult(code, it) }

        finish()
    }

    data class TitledText(val title: String, val value: String)

    data class MessageDetails(
        val attachments: List<Attachment> = emptyList(),
        val sent: TitledText? = null,
        val received: TitledText? = null,
        val error: TitledText? = null,
        val senderInfo: TitledText? = null,
        val sender: Recipient? = null
    )

    data class Attachment(
        val slide: Slide,
        val fileDetails: List<TitledText>
    )

    @Preview
    @Composable
    fun PreviewMessageDetails() {
        MessageDetails(
            MessageDetails(
                attachments = listOf(),
                sent = TitledText("Sent:", "6:12 AM Tue, 09/08/2022"),
                received = TitledText("Received:", "6:12 AM Tue, 09/08/2022"),
                error = TitledText("Error:", "Message failed to send"),
                senderInfo = TitledText("Connor", "d4f1g54sdf5g1d5f4g65ds4564df65f4g65d54gdfsg"),
            )
        )
    }

    @Composable
    fun MessageDetails(
        messageDetails: MessageDetails,
        onReply: () -> Unit = {},
        onResend: () -> Unit = {},
        onDelete: () -> Unit = {},
    ) {
        messageDetails.apply {
            AppTheme {
                Column(
                    modifier = Modifier.verticalScroll(rememberScrollState()),
                    verticalArrangement = Arrangement.spacedBy(16.dp)
                ) {
                    Attachments(attachments)
                    if (sent != null || received != null || senderInfo != null) CellWithPaddingAndMargin {
                        Column(verticalArrangement = Arrangement.spacedBy(16.dp)) {
                            sent?.let { titledText(it) }
                            received?.let { titledText(it) }
                            error?.let {
                                titledText(
                                    it,
                                    valueStyle = LocalTextStyle.current.copy(color = colorDestructive)
                                )
                            }
                            senderInfo?.let {
                                titledView("From:") {
                                    Row {
                                        sender?.let {
                                            Box(
                                                modifier = Modifier
                                                    .width(60.dp)
                                                    .align(Alignment.CenterVertically)
                                            ) {
                                                AndroidView(
                                                    factory = {
                                                        ProfilePictureView(it).apply {
                                                            update(
                                                                sender
                                                            )
                                                        }
                                                    },
                                                    modifier = Modifier
                                                        .width(46.dp)
                                                        .height(46.dp)
                                                )
                                            }
                                        }
                                        Column {
                                            titledText(
                                                it,
                                                valueStyle = LocalTextStyle.current.copy(fontFamily = FontFamily.Monospace)
                                            )
                                        }
                                    }
                                }
                            }
                        }
                    }
                    Cell {
                        Column {
                            ItemButton(
                                "Reply",
                                R.drawable.ic_message_details__reply,
                                onClick = onReply
                            )
                            Divider()
                            if (error != null) {
                                ItemButton(
                                    "Resend",
                                    R.drawable.ic_message_details__refresh,
                                    onClick = onResend
                                )
                                Divider()
                            }
                            ItemButton(
                                "Delete",
                                R.drawable.ic_message_details__trash,
                                colors = destructiveButtonColors(),
                                onClick = onDelete
                            )
                        }
                    }
                }
            }
        }
    }

    @Composable
    fun Attachments(attachments: List<Attachment>) {
        val slide = attachments.firstOrNull()?.slide ?: return
        when {
            slide.hasImage() -> ImageAttachments(attachments)
        }
    }

    @OptIn(
        ExperimentalFoundationApi::class,
        ExperimentalGlideComposeApi::class,
    )
    @Composable
    fun ImageAttachments(attachments: List<Attachment>) {
        val imageAttachments = attachments.filter { it.slide.hasImage() }
        val pagerState = rememberPagerState { imageAttachments.size }

        Column(verticalArrangement = Arrangement.spacedBy(16.dp)) {
            Row {
                if (imageAttachments.size >= 2) PrevButton(pagerState, modifier = Modifier.align(Alignment.CenterVertically))
                else Spacer(modifier = Modifier.width(32.dp))
                Box(modifier = Modifier.weight(1f)) {
                    CellNoMargin {
                        HorizontalPager(state = pagerState) { i ->
                            imageAttachments[i].slide.apply {
                                GlideImage(
                                    contentScale = ContentScale.Crop,
                                    modifier = Modifier.aspectRatio(1f),
                                    model = uri,
                                    contentDescription = fileName.orNull() ?: "image"
                                )
                            }
                        }
                    }
                    if (imageAttachments.size >= 2) {
                        SessionHorizontalPagerIndicator(
                            modifier = Modifier.align(Alignment.BottomCenter),
                            pagerState = pagerState,
                            pageCount = imageAttachments.size,
                        )
                    }
                }
                if (imageAttachments.size >= 2) NextButton(pagerState, modifier = Modifier.align(Alignment.CenterVertically))
                else Spacer(modifier = Modifier.width(32.dp))
            }

            FileDetails(attachments, pagerState)
        }
    }

    @OptIn(ExperimentalFoundationApi::class)
    @Composable
    fun PrevButton(pagerState: PagerState, modifier: Modifier = Modifier) {
        CarouselButton(pagerState, modifier = modifier, enabled = pagerState.canScrollBackward, id = R.drawable.ic_prev, delta = -1)
    }

    @OptIn(ExperimentalFoundationApi::class)
    @Composable
    fun NextButton(pagerState: PagerState, modifier: Modifier = Modifier) {
        CarouselButton(pagerState, modifier = modifier, enabled = pagerState.canScrollForward, id = R.drawable.ic_next, delta = 1)
    }

    @OptIn(ExperimentalFoundationApi::class)
    @Composable
    fun CarouselButton(
        pagerState: PagerState,
        modifier: Modifier = Modifier,
        enabled: Boolean,
        @DrawableRes id: Int,
        delta: Int
    ) {
        val animationScope = rememberCoroutineScope()
        pagerState.apply {
            IconButton(
                modifier = Modifier
                    .width(40.dp)
                    .then(modifier),
                enabled = enabled,
                onClick = { animationScope.launch { animateScrollToPage(currentPage + delta) } }) {
                Icon(
                    painter = painterResource(id = id),
                    contentDescription = "",
                )
            }
        }
    }

    @OptIn(ExperimentalFoundationApi::class, ExperimentalLayoutApi::class)
    @Composable
    fun FileDetails(attachments: List<Attachment>, pagerState: PagerState) {
        attachments[pagerState.currentPage].fileDetails.takeIf { it.isNotEmpty() }?.let {
            CellWithPaddingAndMargin {
                FlowRow(
                    verticalArrangement = Arrangement.spacedBy(16.dp),
                    maxItemsInEachRow = 2
                ) {
                    it.forEach { titledText(it, Modifier.weight(1f)) }
                }
            }
        }
    }

    @Composable
    fun Divider() {
        Divider(
            modifier = Modifier.padding(horizontal = 16.dp),
            thickness = 1.dp,
            color = LocalExtraColors.current.divider
        )
    }

    @Composable
    fun titledText(
        titledText: TitledText,
        modifier: Modifier = Modifier,
        valueStyle: TextStyle = LocalTextStyle.current
    ) {
        Column(modifier = modifier, verticalArrangement = Arrangement.spacedBy(4.dp)) {
            Title(titledText.title)
            Text(titledText.value, style = valueStyle)
        }
    }

    @Composable
    fun titledView(title: String, modifier: Modifier = Modifier, content: @Composable () -> Unit) {
        Column(modifier = modifier, verticalArrangement = Arrangement.spacedBy(4.dp)) {
            Title(title)
            content()
        }
    }

    @Composable
    fun Title(text: String) {
        Text(text, fontWeight = FontWeight.Bold)
    }
}