package io.oxygenhub.android

import android.content.Intent
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.runtime.getValue
import androidx.compose.runtime.key
import androidx.compose.runtime.mutableStateOf
import io.oxygenhub.android.alerts.LandAlerts
import io.oxygenhub.android.ui.nav.ProposalRoute
import androidx.lifecycle.compose.collectAsStateWithLifecycle
import io.oxygenhub.android.ui.nav.SignedInApp
import io.oxygenhub.android.ui.nav.rememberViewModel
import io.oxygenhub.android.ui.signin.SignInScreen
import io.oxygenhub.android.ui.signin.SignInViewModel
import io.oxygenhub.android.ui.theme.OxygenHubTheme
import uniffi.rust_core.oxygenGreeting

class MainActivity : ComponentActivity() {
    /** A proposal a notification asked to open (#20), until it is shown. */
    private val opening = mutableStateOf<ProposalRoute?>(null)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        if (savedInstanceState == null) opening.value = proposalIn(intent)
        enableEdgeToEdge()
        val container = (application as OxygenHubApp).container
        val sessions = container.sessions
        setContent {
            OxygenHubTheme {
                val session by sessions.session.collectAsStateWithLifecycle()
                val signedIn = session
                val api = signedIn?.let { sessions.api() }
                if (signedIn == null || api == null) {
                    SignInScreen(
                        rememberViewModel { SignInViewModel(sessions, container::deviceAuth, container.clientName, DEFAULT_HUB) },
                    )
                } else {
                    // A new session starts the signed-in app afresh: nothing of the last account's is kept.
                    key(signedIn) {
                        SignedInApp(
                            session = signedIn,
                            api = api,
                            nativeCore = { oxygenGreeting(signedIn.username) },
                            onSignOut = { sessions.signOut() },
                            open = opening.value,
                            onOpened = { opening.value = null },
                        )
                    }
                }
            }
        }
    }

    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        proposalIn(intent)?.let { opening.value = it }
    }

    private fun proposalIn(intent: Intent?): ProposalRoute? {
        val repository = intent?.getStringExtra(LandAlerts.EXTRA_REPOSITORY) ?: return null
        val number = intent.getLongExtra(LandAlerts.EXTRA_NUMBER, 0)
        if ('/' !in repository || number <= 0) return null
        return ProposalRoute(repository.substringBefore('/'), repository.substringAfter('/'), number)
    }
}