session-android/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/LinkPreviewView.kt

package org.thoughtcrime.securesms.conversation.v2.messages

import android.content.Context
import android.graphics.Canvas
import android.graphics.Rect
import android.text.method.LinkMovementMethod
import android.util.AttributeSet
import android.view.LayoutInflater
import android.view.MotionEvent
import android.widget.LinearLayout
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.res.ResourcesCompat
import androidx.core.text.getSpans
import androidx.core.text.toSpannable
import androidx.core.view.isVisible
import kotlinx.android.synthetic.main.view_link_preview.view.*
import network.loki.messenger.R
import org.thoughtcrime.securesms.components.CornerMask
import org.thoughtcrime.securesms.conversation.v2.dialogs.OpenURLDialog
import org.thoughtcrime.securesms.conversation.v2.utilities.MessageBubbleUtilities
import org.thoughtcrime.securesms.conversation.v2.utilities.ModalURLSpan
import org.thoughtcrime.securesms.conversation.v2.utilities.TextUtilities.getIntersectedModalSpans
import org.thoughtcrime.securesms.database.model.MmsMessageRecord
import org.thoughtcrime.securesms.util.UiModeUtilities
import org.thoughtcrime.securesms.mms.GlideRequests
import org.thoughtcrime.securesms.mms.ImageSlide

class LinkPreviewView : LinearLayout {
    private val cornerMask by lazy { CornerMask(this) }
    private var url: String? = null
    lateinit var bodyTextView: TextView

    // region Lifecycle
    constructor(context: Context) : super(context) { initialize() }
    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) { initialize() }
    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) { initialize() }

    private fun initialize() {
        LayoutInflater.from(context).inflate(R.layout.view_link_preview, this)
    }
    // endregion

    // region Updating
    fun bind(message: MmsMessageRecord, glide: GlideRequests, isStartOfMessageCluster: Boolean, isEndOfMessageCluster: Boolean, searchQuery: String?) {
        val linkPreview = message.linkPreviews.first()
        url = linkPreview.url
        // Thumbnail
        if (linkPreview.getThumbnail().isPresent) {
            // This internally fetches the thumbnail
            thumbnailImageView.setImageResource(glide, ImageSlide(context, linkPreview.getThumbnail().get()), isPreview = false, message)
            thumbnailImageView.loadIndicator.isVisible = false
        }
        // Title
        titleTextView.text = linkPreview.title
        val textColorID = if (message.isOutgoing && UiModeUtilities.isDayUiMode(context)) {
            R.color.white
        } else {
            if (UiModeUtilities.isDayUiMode(context)) R.color.black else R.color.white
        }
        titleTextView.setTextColor(ResourcesCompat.getColor(resources, textColorID, context.theme))
        // Body
        bodyTextView = VisibleMessageContentView.getBodyTextView(context, message, searchQuery)
        mainLinkPreviewContainer.addView(bodyTextView)
        // Corner radii
        val cornerRadii = MessageBubbleUtilities.calculateRadii(context, isStartOfMessageCluster, isEndOfMessageCluster, message.isOutgoing)
        cornerMask.setTopLeftRadius(cornerRadii[0])
        cornerMask.setTopRightRadius(cornerRadii[1])
        cornerMask.setBottomRightRadius(cornerRadii[2])
        cornerMask.setBottomLeftRadius(cornerRadii[3])
    }

    override fun dispatchDraw(canvas: Canvas) {
        super.dispatchDraw(canvas)
        cornerMask.mask(canvas)
    }
    // endregion

    // region Interaction
    fun calculateHit(event: MotionEvent) {
        val rawXInt = event.rawX.toInt()
        val rawYInt = event.rawY.toInt()
        val hitRect = Rect(rawXInt, rawYInt, rawXInt, rawYInt)
        val previewRect = Rect()
        mainLinkPreviewParent.getGlobalVisibleRect(previewRect)
        if (previewRect.contains(hitRect)) {
            openURL()
            return
        }
        // intersectedModalSpans should only be a list of one item
        val hitSpans = bodyTextView.getIntersectedModalSpans(hitRect)
        hitSpans.forEach { span ->
            span.onClick(bodyTextView)
        }
    }

    fun openURL() {
        val url = this.url ?: return
        val activity = context as AppCompatActivity
        OpenURLDialog(url).show(activity.supportFragmentManager, "Open URL Dialog")
    }
    // endregion
}