package com.example.aiapp

import android.content.Intent
import android.net.Uri
import androidx.core.content.IntentCompat

/**
 * What another app handed this one through the share sheet, waiting to be attached to a session.
 *
 * Held as the URIs rather than uploaded on arrival, because an upload belongs to a session and the
 * share arrives before anyone has said which. [serial] makes two shares of the same thing two
 * requests, for the reason [SessionOpenRequest] carries one.
 */
data class ShareRequest(val uris: List<Uri>, val text: String?, val serial: Int)

/** The share in [intent], or null when it is some other intent. */
fun sharedContent(intent: Intent, serial: Int): ShareRequest? {
    val uris =
        when (intent.action) {
            Intent.ACTION_SEND ->
                listOfNotNull(
                    IntentCompat.getParcelableExtra(intent, Intent.EXTRA_STREAM, Uri::class.java)
                )
            Intent.ACTION_SEND_MULTIPLE ->
                IntentCompat.getParcelableArrayListExtra(
                        intent,
                        Intent.EXTRA_STREAM,
                        Uri::class.java,
                    )
                    .orEmpty()
            else -> return null
        }
    val text = intent.getStringExtra(Intent.EXTRA_TEXT)?.takeIf { it.isNotBlank() }
    if (uris.isEmpty() && text == null) return null
    return ShareRequest(uris, text, serial)
}

/** What is waiting, for the banner that says so. */
fun ShareRequest.summary(): String =
    when {
        uris.size == 1 -> "1 file to attach"
        uris.isNotEmpty() -> "${uris.size} files to attach"
        else -> "Text to attach"
    }