package chat.rocket.android.chatrooms.adapter

import android.app.Application
import android.text.SpannableStringBuilder
import androidx.core.content.ContextCompat
import androidx.core.text.bold
import androidx.core.text.color
import chat.rocket.android.R
import chat.rocket.android.chatrooms.adapter.model.Room
import chat.rocket.android.db.model.ChatRoom
import chat.rocket.android.infrastructure.LocalRepository
import chat.rocket.android.infrastructure.checkIfMyself
import chat.rocket.android.server.domain.PublicSettings
import chat.rocket.android.server.domain.showLastMessage
import chat.rocket.android.server.domain.useRealName
import chat.rocket.android.util.extensions.avatarUrl
import chat.rocket.android.util.extensions.date
import chat.rocket.android.util.extensions.localDateTime
import chat.rocket.common.model.RoomType
import chat.rocket.common.model.roomTypeOf
import chat.rocket.common.model.userStatusOf

class RoomMapper(private val context: Application,
                 private val settings: PublicSettings,
                 private val localRepository: LocalRepository,
                 private val serverUrl: String) {

    private val nameUnreadColor = ContextCompat.getColor(context, R.color.colorPrimaryText)
    private val nameColor = ContextCompat.getColor(context, R.color.colorSecondaryText)
    private val dateUnreadColor = ContextCompat.getColor(context, R.color.colorAccent)
    private val dateColor = ContextCompat.getColor(context, R.color.colorSecondaryText)
    private val messageUnreadColor = ContextCompat.getColor(context, android.R.color.primary_text_light)
    private val messageColor = ContextCompat.getColor(context, R.color.colorSecondaryText)

    fun map(rooms: List<ChatRoom>, grouped: Boolean): List<ItemHolder<*>> {
        val list = ArrayList<ItemHolder<*>>(rooms.size + 4)
        var lastType: String? = null
        rooms.forEach { room ->
            if (grouped && lastType != room.chatRoom.type) {
                list.add(HeaderItemHolder(roomType(room.chatRoom.type)))
            }
            list.add(RoomItemHolder(map(room)))
            lastType = room.chatRoom.type
        }

        return list
    }

    fun map(chatRoom: ChatRoom): Room {
        return with(chatRoom.chatRoom) {
            val isUnread = alert || unread > 0
            val type = roomTypeOf(type)
            val status = chatRoom.status?.let { userStatusOf(it) }
            val roomName = mapName(name, chatRoom.userFullname, isUnread)
            val timestamp = mapDate(lastMessageTimestamp ?: updatedAt, isUnread)
            val avatar = if (type is RoomType.DirectMessage) {
                serverUrl.avatarUrl(name)
            } else {
                serverUrl.avatarUrl(name, isGroupOrChannel = true)
            }
            val unread = mapUnread(unread)
            val lastMessage = mapLastMessage(chatRoom.lastMessageUserName,
                    chatRoom.lastMessageUserFullName, lastMessageText, isUnread)

            Room(
                id = id,
                name = roomName,
                type = type,
                avatar = avatar,
                date = timestamp,
                unread = unread,
                alert = isUnread,
                lastMessage = lastMessage,
                status = status
            )
        }
    }

    private fun roomType(type: String): String {
        val resources = context.resources
        return when (type) {
            RoomType.CHANNEL -> resources.getString(R.string.header_channel)
            RoomType.PRIVATE_GROUP -> resources.getString(R.string.header_private_groups)
            RoomType.DIRECT_MESSAGE -> resources.getString(R.string.header_direct_messages)
            RoomType.LIVECHAT -> resources.getString(R.string.header_live_chats)
            else -> resources.getString(R.string.header_unknown)
        }
    }

    private fun mapLastMessage(name: String?, fullName: String?, text: String?, unread: Boolean): CharSequence? {
        return if (!settings.showLastMessage()) {
            null
        } else if (name != null && text != null) {
            val user = if (localRepository.checkIfMyself(name)) {
                "${context.getString(R.string.msg_you)}: "
            } else {
                "${mapName(name, fullName, unread)}: "
            }

            val color = if (unread) messageUnreadColor else messageColor

            SpannableStringBuilder()
                    .color(color) {
                        bold { append(user) }
                        append(text)
                    }
        } else {
            context.getText(R.string.msg_no_messages_yet)
        }
    }

    private fun mapName(name: String, fullName: String?, unread: Boolean): CharSequence {
        val roomName = if (settings.useRealName()) {
            fullName ?: name
        } else {
            name
        }

        val color = if (unread) nameUnreadColor else nameColor
        return SpannableStringBuilder()
                .color(color) {
                    append(roomName)
                }
    }

    private fun mapUnread(unread: Long): String? {
        return when(unread) {
            0L -> null
            in 1..99 -> unread.toString()
            else -> context.getString(R.string.msg_more_than_ninety_nine_unread_messages)

        }
    }

    private fun mapDate(date: Long?, unread: Boolean): CharSequence? {
        return date?.localDateTime()?.date(context)?.let {
            val color = if (unread) dateUnreadColor else dateColor
            SpannableStringBuilder().color(color) {
                append(it)
            }
        }
    }
}