/* Copyright 2021 Tusky Contributors
 *
 * This file is a part of Tusky.
 *
 * This program 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 of the
 * License, or (at your option) any later version.
 *
 * Tusky 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 Tusky; if not,
 * see <http://www.gnu.org/licenses>. */

package com.keylesspalace.tusky.components.search.fragments

import android.Manifest
import android.app.DownloadManager
import android.content.ClipData
import android.content.ClipboardManager
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import android.os.Environment
import android.util.Log
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.widget.PopupMenu
import androidx.core.app.ActivityOptionsCompat
import androidx.core.view.ViewCompat
import androidx.lifecycle.Lifecycle
import androidx.paging.PagingData
import androidx.paging.PagingDataAdapter
import androidx.preference.PreferenceManager
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import autodispose2.androidx.lifecycle.AndroidLifecycleScopeProvider.from
import autodispose2.autoDispose
import com.keylesspalace.tusky.BaseActivity
import com.keylesspalace.tusky.R
import com.keylesspalace.tusky.ViewMediaActivity
import com.keylesspalace.tusky.components.compose.ComposeActivity
import com.keylesspalace.tusky.components.compose.ComposeActivity.ComposeOptions
import com.keylesspalace.tusky.components.report.ReportActivity
import com.keylesspalace.tusky.components.search.adapter.SearchStatusesAdapter
import com.keylesspalace.tusky.db.AccountEntity
import com.keylesspalace.tusky.entity.Attachment
import com.keylesspalace.tusky.entity.Status
import com.keylesspalace.tusky.entity.Status.Mention
import com.keylesspalace.tusky.interfaces.AccountSelectionListener
import com.keylesspalace.tusky.interfaces.StatusActionListener
import com.keylesspalace.tusky.settings.PrefKeys
import com.keylesspalace.tusky.util.CardViewMode
import com.keylesspalace.tusky.util.StatusDisplayOptions
import com.keylesspalace.tusky.util.openLink
import com.keylesspalace.tusky.view.showMuteAccountDialog
import com.keylesspalace.tusky.viewdata.AttachmentViewData
import com.keylesspalace.tusky.viewdata.StatusViewData
import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
import kotlinx.coroutines.flow.Flow

class SearchStatusesFragment : SearchFragment<StatusViewData.Concrete>(), StatusActionListener {

    override val data: Flow<PagingData<StatusViewData.Concrete>>
        get() = viewModel.statusesFlow

    private val searchAdapter
        get() = super.adapter as SearchStatusesAdapter

    override fun createAdapter(): PagingDataAdapter<StatusViewData.Concrete, *> {
        val preferences = PreferenceManager.getDefaultSharedPreferences(binding.searchRecyclerView.context)
        val statusDisplayOptions = StatusDisplayOptions(
            animateAvatars = preferences.getBoolean("animateGifAvatars", false),
            mediaPreviewEnabled = viewModel.mediaPreviewEnabled,
            useAbsoluteTime = preferences.getBoolean("absoluteTimeView", false),
            showBotOverlay = preferences.getBoolean("showBotOverlay", true),
            useBlurhash = preferences.getBoolean("useBlurhash", true),
            cardViewMode = CardViewMode.NONE,
            confirmReblogs = preferences.getBoolean("confirmReblogs", true),
            confirmFavourites = preferences.getBoolean("confirmFavourites", false),
            hideStats = preferences.getBoolean(PrefKeys.WELLBEING_HIDE_STATS_POSTS, false),
            animateEmojis = preferences.getBoolean(PrefKeys.ANIMATE_CUSTOM_EMOJIS, false),
            quoteEnabled = viewModel.quoteEnabled,
        )

        binding.searchRecyclerView.addItemDecoration(DividerItemDecoration(binding.searchRecyclerView.context, DividerItemDecoration.VERTICAL))
        binding.searchRecyclerView.layoutManager = LinearLayoutManager(binding.searchRecyclerView.context)
        return SearchStatusesAdapter(statusDisplayOptions, this)
    }

    override fun onContentHiddenChange(isShowing: Boolean, position: Int) {
        searchAdapter.peek(position)?.let {
            viewModel.contentHiddenChange(it, isShowing)
        }
    }

    override fun onReply(position: Int) {
        searchAdapter.peek(position)?.status?.let { status ->
            reply(status)
        }
    }

    override fun onFavourite(favourite: Boolean, position: Int) {
        searchAdapter.peek(position)?.let { status ->
            viewModel.favorite(status, favourite)
        }
    }

    override fun onQuote(position: Int) {
        searchAdapter.peek(position)?.status?.let { status ->
            quote(status)
        }
    }

    override fun onBookmark(bookmark: Boolean, position: Int) {
        searchAdapter.peek(position)?.let { status ->
            viewModel.bookmark(status, bookmark)
        }
    }

    override fun onMore(view: View, position: Int) {
        searchAdapter.peek(position)?.status?.let {
            more(it, view, position)
        }
    }

    override fun onViewMedia(position: Int, attachmentIndex: Int, view: View?) {
        searchAdapter.peek(position)?.status?.actionableStatus?.let { actionable ->
            when (actionable.attachments[attachmentIndex].type) {
                Attachment.Type.GIFV, Attachment.Type.VIDEO, Attachment.Type.IMAGE, Attachment.Type.AUDIO -> {
                    val attachments = AttachmentViewData.list(actionable)
                    val intent = ViewMediaActivity.newIntent(
                        context, attachments,
                        attachmentIndex
                    )
                    if (view != null) {
                        val url = actionable.attachments[attachmentIndex].url
                        ViewCompat.setTransitionName(view, url)
                        val options = ActivityOptionsCompat.makeSceneTransitionAnimation(
                            requireActivity(),
                            view, url
                        )
                        startActivity(intent, options.toBundle())
                    } else {
                        startActivity(intent)
                    }
                }
                Attachment.Type.UNKNOWN -> {
                    context?.openLink(actionable.attachments[attachmentIndex].url)
                }
            }
        }
    }

    override fun onViewThread(position: Int) {
        searchAdapter.peek(position)?.status?.let { status ->
            val actionableStatus = status.actionableStatus
            bottomSheetActivity?.viewThread(actionableStatus.id, actionableStatus.url)
        }
    }

    override fun onOpenReblog(position: Int) {
        searchAdapter.peek(position)?.status?.let { status ->
            bottomSheetActivity?.viewAccount(status.account.id)
        }
    }

    override fun onExpandedChange(expanded: Boolean, position: Int) {
        searchAdapter.peek(position)?.let {
            viewModel.expandedChange(it, expanded)
        }
    }

    override fun onLoadMore(position: Int) {
        // Not possible here
    }

    override fun onContentCollapsedChange(isCollapsed: Boolean, position: Int) {
        searchAdapter.peek(position)?.let {
            viewModel.collapsedChange(it, isCollapsed)
        }
    }

    override fun onVoteInPoll(position: Int, choices: MutableList<Int>) {
        searchAdapter.peek(position)?.let {
            viewModel.voteInPoll(it, choices)
        }
    }

    private fun removeItem(position: Int) {
        searchAdapter.peek(position)?.let {
            viewModel.removeItem(it)
        }
    }

    override fun onReblog(reblog: Boolean, position: Int) {
        searchAdapter.peek(position)?.let { status ->
            viewModel.reblog(status, reblog)
        }
    }

    companion object {
        fun newInstance() = SearchStatusesFragment()
    }

    private fun reply(status: Status) {
        val actionableStatus = status.actionableStatus
        val mentionedUsernames = actionableStatus.mentions.map { it.username }
            .toMutableSet()
            .apply {
                add(actionableStatus.account.username)
                remove(viewModel.activeAccount?.username)
            }

        val intent = ComposeActivity.startIntent(
            requireContext(),
            ComposeOptions(
                inReplyToId = status.actionableId,
                replyVisibility = actionableStatus.visibility,
                contentWarning = actionableStatus.spoilerText,
                mentionedUsernames = mentionedUsernames,
                replyingStatusAuthor = actionableStatus.account.localUsername,
                replyingStatusContent = actionableStatus.content.toString()
            )
        )
        startActivity(intent)
    }

    private fun quote(status: Status) {
        val actionableStatus = status.actionableStatus
        val mentionedUsernames = actionableStatus.mentions.map { it.username }
            .toMutableSet()
            .apply {
                add(actionableStatus.account.name)
                remove(viewModel.activeAccount?.username)
            }

        val intent = ComposeActivity.startIntent(
        requireContext(),
            ComposeOptions(
                quoteId = status.actionableId,
                quoteStatusAuthor = actionableStatus.account.localUsername,
                quoteStatusContent = actionableStatus.content.toString(),
                replyVisibility = actionableStatus.visibility,
                contentWarning = actionableStatus.spoilerText,
                mentionedUsernames = mentionedUsernames
            )
        )
        startActivity(intent)
    }

    private fun more(status: Status, view: View, position: Int) {
        val id = status.actionableId
        val accountId = status.actionableStatus.account.id
        val accountUsername = status.actionableStatus.account.username
        val statusUrl = status.actionableStatus.url
        val loggedInAccountId = viewModel.activeAccount?.accountId

        val popup = PopupMenu(view.context, view)
        val statusIsByCurrentUser = loggedInAccountId?.equals(accountId) == true
        // Give a different menu depending on whether this is the user's own toot or not.
        if (statusIsByCurrentUser) {
            popup.inflate(R.menu.status_more_for_user)
            val menu = popup.menu
            menu.findItem(R.id.status_open_as).isVisible = !statusUrl.isNullOrBlank()
            when (status.visibility) {
                Status.Visibility.PUBLIC, Status.Visibility.UNLISTED -> {
                    val textId = getString(if (status.isPinned()) R.string.unpin_action else R.string.pin_action)
                    menu.add(0, R.id.pin, 1, textId)
                }
                Status.Visibility.PRIVATE -> {
                    var reblogged = status.reblogged
                    if (status.reblog != null) reblogged = status.reblog.reblogged
                    menu.findItem(R.id.status_reblog_private).isVisible = !reblogged
                    menu.findItem(R.id.status_unreblog_private).isVisible = reblogged
                }
                Status.Visibility.UNKNOWN, Status.Visibility.UNLEAKABLE, Status.Visibility.DIRECT -> {
                } // Ignore
            }
        } else {
            popup.inflate(R.menu.status_more)
            val menu = popup.menu
            menu.findItem(R.id.status_download_media).isVisible = status.attachments.isNotEmpty()
        }

        val openAsItem = popup.menu.findItem(R.id.status_open_as)
        val openAsText = bottomSheetActivity?.openAsText
        if (openAsText == null) {
            openAsItem.isVisible = false
        } else {
            openAsItem.title = openAsText
        }

        val mutable = statusIsByCurrentUser || accountIsInMentions(viewModel.activeAccount, status.mentions)
        val muteConversationItem = popup.menu.findItem(R.id.status_mute_conversation).apply {
            isVisible = mutable
        }
        if (mutable) {
            muteConversationItem.setTitle(
                if (status.muted == true) {
                    R.string.action_unmute_conversation
                } else {
                    R.string.action_mute_conversation
                }
            )
        }

        popup.setOnMenuItemClickListener { item ->
            when (item.itemId) {
                R.id.post_share_content -> {
                    val statusToShare: Status = status.actionableStatus

                    val sendIntent = Intent()
                    sendIntent.action = Intent.ACTION_SEND

                    val stringToShare = statusToShare.account.username +
                        " - " +
                        statusToShare.content.toString()
                    sendIntent.putExtra(Intent.EXTRA_TEXT, stringToShare)
                    sendIntent.type = "text/plain"
                    startActivity(Intent.createChooser(sendIntent, resources.getText(R.string.send_post_content_to)))
                    return@setOnMenuItemClickListener true
                }
                R.id.post_share_link -> {
                    val sendIntent = Intent()
                    sendIntent.action = Intent.ACTION_SEND
                    sendIntent.putExtra(Intent.EXTRA_TEXT, statusUrl)
                    sendIntent.type = "text/plain"
                    startActivity(Intent.createChooser(sendIntent, resources.getText(R.string.send_post_link_to)))
                    return@setOnMenuItemClickListener true
                }
                R.id.status_copy_link -> {
                    val clipboard = requireActivity().getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
                    clipboard.setPrimaryClip(ClipData.newPlainText(null, statusUrl))
                    return@setOnMenuItemClickListener true
                }
                R.id.status_open_as -> {
                    showOpenAsDialog(statusUrl!!, item.title)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_download_media -> {
                    requestDownloadAllMedia(status)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_mute_conversation -> {
                    searchAdapter.peek(position)?.let { foundStatus ->
                        viewModel.muteConversation(foundStatus, status.muted != true)
                    }
                    return@setOnMenuItemClickListener true
                }
                R.id.status_mute -> {
                    onMute(accountId, accountUsername)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_block -> {
                    onBlock(accountId, accountUsername)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_report -> {
                    openReportPage(accountId, accountUsername, id)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_unreblog_private -> {
                    onReblog(false, position)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_reblog_private -> {
                    onReblog(true, position)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_delete -> {
                    showConfirmDeleteDialog(id, position)
                    return@setOnMenuItemClickListener true
                }
                R.id.status_delete_and_redraft -> {
                    showConfirmEditDialog(id, position, status)
                    return@setOnMenuItemClickListener true
                }
                R.id.pin -> {
                    viewModel.pinAccount(status, !status.isPinned())
                    return@setOnMenuItemClickListener true
                }
            }
            false
        }
        popup.show()
    }

    private fun onBlock(accountId: String, accountUsername: String) {
        AlertDialog.Builder(requireContext())
            .setMessage(getString(R.string.dialog_block_warning, accountUsername))
            .setPositiveButton(android.R.string.ok) { _, _ -> viewModel.blockAccount(accountId) }
            .setNegativeButton(android.R.string.cancel, null)
            .show()
    }

    private fun onMute(accountId: String, accountUsername: String) {
        showMuteAccountDialog(
            this.requireActivity(),
            accountUsername
        ) { notifications, duration ->
            viewModel.muteAccount(accountId, notifications, duration)
        }
    }

    private fun accountIsInMentions(account: AccountEntity?, mentions: List<Mention>): Boolean {
        return mentions.firstOrNull {
            account?.username == it.username && account.domain == Uri.parse(it.url)?.host
        } != null
    }

    private fun showOpenAsDialog(statusUrl: String, dialogTitle: CharSequence) {
        bottomSheetActivity?.showAccountChooserDialog(
            dialogTitle, false,
            object : AccountSelectionListener {
                override fun onAccountSelected(account: AccountEntity) {
                    bottomSheetActivity?.openAsAccount(statusUrl, account)
                }
            }
        )
    }

    private fun downloadAllMedia(status: Status) {
        Toast.makeText(context, R.string.downloading_media, Toast.LENGTH_SHORT).show()
        for ((_, url) in status.attachments) {
            val uri = Uri.parse(url)
            val filename = uri.lastPathSegment

            val downloadManager = requireActivity().getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
            val request = DownloadManager.Request(uri)
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename)
            downloadManager.enqueue(request)
        }
    }

    private fun requestDownloadAllMedia(status: Status) {
        val permissions = arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE)
        (activity as BaseActivity).requestPermissions(permissions) { _, grantResults ->
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                downloadAllMedia(status)
            } else {
                Toast.makeText(context, R.string.error_media_download_permission, Toast.LENGTH_SHORT).show()
            }
        }
    }

    private fun openReportPage(accountId: String, accountUsername: String, statusId: String) {
        startActivity(ReportActivity.getIntent(requireContext(), accountId, accountUsername, statusId))
    }

    private fun showConfirmDeleteDialog(id: String, position: Int) {
        context?.let {
            AlertDialog.Builder(it)
                .setMessage(R.string.dialog_delete_post_warning)
                .setPositiveButton(android.R.string.ok) { _, _ ->
                    viewModel.deleteStatus(id)
                    removeItem(position)
                }
                .setNegativeButton(android.R.string.cancel, null)
                .show()
        }
    }

    private fun showConfirmEditDialog(id: String, position: Int, status: Status) {
        activity?.let {
            AlertDialog.Builder(it)
                .setMessage(R.string.dialog_redraft_post_warning)
                .setPositiveButton(android.R.string.ok) { _, _ ->
                    viewModel.deleteStatus(id)
                        .observeOn(AndroidSchedulers.mainThread())
                        .autoDispose(from(this, Lifecycle.Event.ON_DESTROY))
                        .subscribe(
                            { deletedStatus ->
                                removeItem(position)

                                val redraftStatus = if (deletedStatus.isEmpty()) {
                                    status.toDeletedStatus()
                                } else {
                                    deletedStatus
                                }

                                val intent = ComposeActivity.startIntent(
                                    requireContext(),
                                    ComposeOptions(
                                        content = redraftStatus.text ?: "",
                                        inReplyToId = redraftStatus.inReplyToId,
                                        visibility = redraftStatus.visibility,
                                        contentWarning = redraftStatus.spoilerText,
                                        mediaAttachments = redraftStatus.attachments,
                                        sensitive = redraftStatus.sensitive,
                                        poll = redraftStatus.poll?.toNewPoll(status.createdAt)
                                    )
                                )
                                startActivity(intent)
                            },
                            { error ->
                                Log.w("SearchStatusesFragment", "error deleting status", error)
                                Toast.makeText(context, R.string.error_generic, Toast.LENGTH_SHORT).show()
                            }
                        )
                }
                .setNegativeButton(android.R.string.cancel, null)
                .show()
        }
    }
}