/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * 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 com.google.jetpackcamera.ui

import android.Manifest
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.ui.Modifier
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import com.google.accompanist.permissions.ExperimentalPermissionsApi
import com.google.accompanist.permissions.isGranted
import com.google.accompanist.permissions.rememberMultiplePermissionsState
import com.google.jetpackcamera.BuildConfig
import com.google.jetpackcamera.feature.preview.PreviewMode
import com.google.jetpackcamera.feature.preview.PreviewScreen
import com.google.jetpackcamera.permissions.PermissionsScreen
import com.google.jetpackcamera.settings.SettingsScreen
import com.google.jetpackcamera.settings.VersionInfoHolder
import com.google.jetpackcamera.ui.Routes.PERMISSIONS_ROUTE
import com.google.jetpackcamera.ui.Routes.PREVIEW_ROUTE
import com.google.jetpackcamera.ui.Routes.SETTINGS_ROUTE

@Composable
fun JcaApp(
    openAppSettings: () -> Unit,
    /*TODO(b/306236646): remove after still capture*/
    previewMode: PreviewMode,
    modifier: Modifier = Modifier,
    isDebugMode: Boolean,
    onRequestWindowColorMode: (Int) -> Unit,
    onFirstFrameCaptureCompleted: () -> Unit
) {
    JetpackCameraNavHost(
        previewMode = previewMode,
        isDebugMode = isDebugMode,
        onOpenAppSettings = openAppSettings,
        onRequestWindowColorMode = onRequestWindowColorMode,
        onFirstFrameCaptureCompleted = onFirstFrameCaptureCompleted,
        modifier = modifier
    )
}

@OptIn(ExperimentalPermissionsApi::class)
@Composable
private fun JetpackCameraNavHost(
    modifier: Modifier = Modifier,
    previewMode: PreviewMode,
    isDebugMode: Boolean,
    onOpenAppSettings: () -> Unit,
    onRequestWindowColorMode: (Int) -> Unit,
    onFirstFrameCaptureCompleted: () -> Unit,
    navController: NavHostController = rememberNavController()
) {
    NavHost(
        navController = navController,
        startDestination = PERMISSIONS_ROUTE,
        modifier = modifier
    ) {
        composable(PERMISSIONS_ROUTE) {
            PermissionsScreen(
                shouldRequestAudioPermission = previewMode is PreviewMode.StandardMode,
                onNavigateToPreview = {
                    navController.navigate(PREVIEW_ROUTE) {
                        // cannot navigate back to permissions after leaving
                        popUpTo(0)
                    }
                },
                openAppSettings = onOpenAppSettings
            )
        }

        composable(PREVIEW_ROUTE) {
            val permissionStates = rememberMultiplePermissionsState(
                permissions = listOf(
                    Manifest.permission.CAMERA,
                    Manifest.permission.RECORD_AUDIO
                )
            )
            // Automatically navigate to permissions screen when camera permission revoked
            LaunchedEffect(key1 = permissionStates.permissions[0].status) {
                if (!permissionStates.permissions[0].status.isGranted) {
                    navController.navigate(PERMISSIONS_ROUTE) {
                        // cannot navigate back to preview
                        popUpTo(0)
                    }
                }
            }
            PreviewScreen(
                onNavigateToSettings = { navController.navigate(SETTINGS_ROUTE) },
                onRequestWindowColorMode = onRequestWindowColorMode,
                onFirstFrameCaptureCompleted = onFirstFrameCaptureCompleted,
                previewMode = previewMode,
                isDebugMode = isDebugMode
            )
        }
        composable(SETTINGS_ROUTE) {
            SettingsScreen(
                versionInfo = VersionInfoHolder(
                    versionName = BuildConfig.VERSION_NAME,
                    buildType = BuildConfig.BUILD_TYPE
                ),
                onNavigateBack = { navController.popBackStack() }
            )
        }
    }
}