Nekosu/app/src/main/java/ru/risdeveau/pixeldragon/api/Server.kt

/*
 * Created by sweetbread
 * Copyright (c) 2025. All rights reserved.
 */

package ru.risdeveau.pixeldragon.api

import io.ktor.client.request.get
import io.ktor.client.statement.bodyAsText
import org.json.JSONException
import org.json.JSONObject
import ru.risdeveau.pixeldragon.client
import ru.risdeveau.pixeldragon.homeserver

suspend fun getHomeserver(url: String): String? {
    val r = try { client.get("https://$url/.well-known/matrix/client") }
    catch (_: Exception) { return null }

    val json = try { JSONObject(r.bodyAsText()) }
    catch (_: JSONException) { return null }

    if (!json.has("m.homeserver")) return null

    var homeserver = json.getJSONObject("m.homeserver").getString("base_url")
    if (homeserver.endsWith("/")) homeserver = homeserver.dropLast(1)

    return homeserver
}

fun mxcToUrl(mxc: String): String? {
    val pattern = Regex("mxc://([-a-zA-Z0-9@:%._+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6})/([^#?]+)")
    val match = pattern.find(mxc)

    if ((match?.groupValues[1] == null) or (match?.groupValues[2] == null)) return null

    return "$homeserver/_matrix/client/v1/media/download/${match?.groupValues[1]}/${match?.groupValues[2]}"
}