package com.keylesspalace.tusky.adapter

import android.graphics.Typeface
import android.opengl.Visibility
import android.text.TextUtils
import android.text.format.DateUtils
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import at.connyduck.sparkbutton.helpers.Utils
import com.bumptech.glide.Glide
import com.keylesspalace.tusky.R
import com.keylesspalace.tusky.interfaces.AccountActionListener
import com.keylesspalace.tusky.interfaces.ChatActionListener
import com.keylesspalace.tusky.util.StatusDisplayOptions
import com.keylesspalace.tusky.util.TimestampUtils
import com.keylesspalace.tusky.util.emojify
import com.keylesspalace.tusky.util.loadAvatar
import com.keylesspalace.tusky.viewdata.ChatViewData
import java.text.SimpleDateFormat
import java.util.*

class ChatsViewHolder(view: View) : RecyclerView.ViewHolder(view) {
    object Key {
        const val KEY_CREATED = "created"
    }

    private val avatar: ImageView = view.findViewById(R.id.status_avatar)
    private val avatarInset: ImageView = view.findViewById(R.id.status_avatar_inset)
    private val displayName: TextView = view.findViewById(R.id.status_display_name)
    private val userName: TextView = view.findViewById(R.id.status_username)
    private val timestamp: TextView = view.findViewById(R.id.status_timestamp_info)
    private val content: TextView = view.findViewById(R.id.status_content)
    private val unread: TextView = view.findViewById(R.id.chat_unread)

    private val shortSdf = SimpleDateFormat("HH:mm:ss", Locale.getDefault())
    private val longSdf = SimpleDateFormat("MM/dd HH:mm:ss", Locale.getDefault())

    fun setupWithChat(chat: ChatViewData.Concrete,
                      listener: ChatActionListener,
                      statusDisplayOptions: StatusDisplayOptions,
                      localUserId: String,
                      payload: Any?) {
        if (payload == null) {
            displayName.text = chat.account.displayName?.emojify(chat.account.emojis, displayName, true)
                    ?: ""
            userName.text = userName.context.getString(R.string.status_username_format, chat.account.username)
            setUpdatedAt(chat.updatedAt, statusDisplayOptions)
            setAvatar(chat.account.avatar, chat.account.bot, statusDisplayOptions)
            if (chat.unread <= 0) {
                unread.visibility = View.GONE
            } else if (chat.unread > 99) {
                unread.text = ":)"
            } else {
                unread.text = chat.unread.toString()
            }
            avatar.setOnClickListener { listener.onViewAccount(chat.account.id) }
            val onLongClickListener = View.OnLongClickListener {
                listener.onMore(chat.id, it)
                true
            }
            val onClickListener = View.OnClickListener {
                val pos = adapterPosition
                if (pos != RecyclerView.NO_POSITION)
                    listener.openChat(pos)
            }

            content.setOnLongClickListener(onLongClickListener)
            itemView.setOnLongClickListener(onLongClickListener)
            content.setOnClickListener(onClickListener)
            itemView.setOnClickListener(onClickListener)

            chat.lastMessage?.let {
                var text = if (it.content != null) {
                    content.setTypeface(null, Typeface.NORMAL)

                    it.content.emojify(it.emojis, content, true)
                } else if (it.attachment != null) {
                    content.setTypeface(null, Typeface.ITALIC)

                    content.resources.getString(it.attachment.describeAttachmentType())
                } else ""

                content.text = if(it.accountId == localUserId) {
                    content.resources.getString(R.string.chat_our_last_message).format(text)
                } else text
            }
        } else {
            if(payload is List<*>) {
                for (item in payload as List<*>) {
                    if (Key.KEY_CREATED == item) {
                        setUpdatedAt(chat.updatedAt, statusDisplayOptions)
                    }
                }
            }
        }
    }

    private fun setAvatar(url: String,
                          isBot: Boolean,
                          statusDisplayOptions: StatusDisplayOptions) {
        avatar.setPaddingRelative(0, 0, 0, 0)
        if (statusDisplayOptions.showBotOverlay && isBot) {
            avatarInset.visibility = View.VISIBLE
            avatarInset.setBackgroundColor(0x50ffffff)
            Glide.with(avatarInset)
                .load(R.drawable.ic_bot_24dp)
                .into(avatarInset)
        } else {
            avatarInset.visibility = View.GONE
        }
        val avatarRadius = itemView.context.resources.getDimensionPixelSize(R.dimen.avatar_radius_48dp);
        loadAvatar(url, avatar, avatarRadius,
                statusDisplayOptions.animateAvatars)
    }


    private fun getAbsoluteTime(createdAt: Date?): String? {
        if (createdAt == null) {
            return "??:??:??"
        }
        return if (DateUtils.isToday(createdAt.time)) {
            shortSdf.format(createdAt)
        } else {
            longSdf.format(createdAt)
        }
    }

    private fun setUpdatedAt(updatedAt: Date, statusDisplayOptions: StatusDisplayOptions) {
        if (statusDisplayOptions.useAbsoluteTime) {
            timestamp.text = getAbsoluteTime(updatedAt)
        } else {
            val then = updatedAt.time
            val now = System.currentTimeMillis()
            val readout = TimestampUtils.getRelativeTimeSpanString(timestamp.context, then, now)
            timestamp.text = readout
        }
    }

}

class ChatsAdapter(private val dataSource: TimelineAdapter.AdapterDataSource<ChatViewData>,
                   val statusDisplayOptions: StatusDisplayOptions,
                   private val chatActionListener: ChatActionListener,
                   val localUserId: String) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

    private val VIEW_TYPE_CHAT = 0
    private val VIEW_TYPE_PLACEHOLDER = 1

    override fun getItemCount(): Int {
        return dataSource.itemCount
    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        bindViewHolder(holder, position, null)
    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int, payload: MutableList<Any>) {
        bindViewHolder(holder, position, payload)
    }

    private fun bindViewHolder(holder: RecyclerView.ViewHolder, position: Int, payloads: MutableList<Any>?) {
        val chat: ChatViewData = dataSource.getItemAt(position)
        if(holder is PlaceholderViewHolder) {
            holder.setup(chatActionListener, (chat as ChatViewData.Placeholder).isLoading)
        } else if(holder is ChatsViewHolder) {
            holder.setupWithChat(chat as ChatViewData.Concrete, chatActionListener,
                    statusDisplayOptions, localUserId,
                    if (payloads != null && payloads.isNotEmpty()) payloads[0] else null)
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        if(viewType == VIEW_TYPE_CHAT ) {
            val view = LayoutInflater.from(parent.context)
                    .inflate(R.layout.item_chat, parent, false)
            return ChatsViewHolder(view)
        }
        // else VIEW_TYPE_PLACEHOLDER

        val view = LayoutInflater.from(parent.context)
            .inflate(R.layout.item_status_placeholder, parent, false)
        return PlaceholderViewHolder(view)
    }

    override fun getItemViewType(position: Int): Int {
        if(dataSource.getItemAt(position) is ChatViewData.Concrete)
            return VIEW_TYPE_CHAT

        return VIEW_TYPE_PLACEHOLDER
    }

    override fun getItemId(position: Int): Long {
        return dataSource.getItemAt(position).getViewDataId().toLong()
    }
}