/*
 * Copyright (c) 2023 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.element.android.libraries.deeplink

import android.content.Intent
import android.net.Uri
import io.element.android.libraries.matrix.api.core.RoomId
import io.element.android.libraries.matrix.api.core.SessionId
import io.element.android.libraries.matrix.api.core.ThreadId
import javax.inject.Inject

class DeeplinkParser @Inject constructor() {
    fun getFromIntent(intent: Intent): DeeplinkData? {
        return intent
            .takeIf { it.action == Intent.ACTION_VIEW }
            ?.data
            ?.toDeeplinkData()
    }

    private fun Uri.toDeeplinkData(): DeeplinkData? {
        if (scheme != SCHEME) return null
        if (host != HOST) return null
        val pathBits = path.orEmpty().split("/").drop(1)
        val sessionId = pathBits.elementAtOrNull(0)?.let(::SessionId) ?: return null

        return when (val screenPathComponent = pathBits.elementAtOrNull(1)) {
            null -> DeeplinkData.Root(sessionId)
            else -> {
                val roomId = screenPathComponent.let(::RoomId)
                val threadId = pathBits.elementAtOrNull(2)?.let(::ThreadId)
                DeeplinkData.Room(sessionId, roomId, threadId)
            }
        }
    }
}
