tachiyomi/app/src/main/java/eu/kanade/presentation/library/LibraryScreen.kt

package eu.kanade.presentation.library

import androidx.compose.animation.Crossfade
import androidx.compose.foundation.layout.padding
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.HelpOutline
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalUriHandler
import eu.kanade.domain.category.model.Category
import eu.kanade.domain.library.model.display
import eu.kanade.presentation.components.EmptyScreen
import eu.kanade.presentation.components.EmptyScreenAction
import eu.kanade.presentation.components.LibraryBottomActionMenu
import eu.kanade.presentation.components.LoadingScreen
import eu.kanade.presentation.components.Scaffold
import eu.kanade.presentation.library.components.LibraryContent
import eu.kanade.presentation.library.components.LibraryToolbar
import eu.kanade.tachiyomi.R
import eu.kanade.tachiyomi.source.LocalSource
import eu.kanade.tachiyomi.ui.library.LibraryPresenter
import eu.kanade.tachiyomi.widget.TachiyomiBottomNavigationView

@Composable
fun LibraryScreen(
    presenter: LibraryPresenter,
    onMangaClicked: (Long) -> Unit,
    onGlobalSearchClicked: () -> Unit,
    onChangeCategoryClicked: () -> Unit,
    onMarkAsReadClicked: () -> Unit,
    onMarkAsUnreadClicked: () -> Unit,
    onDownloadClicked: () -> Unit,
    onDeleteClicked: () -> Unit,
    onClickUnselectAll: () -> Unit,
    onClickSelectAll: () -> Unit,
    onClickInvertSelection: () -> Unit,
    onClickFilter: () -> Unit,
    onClickRefresh: (Category?) -> Boolean,
) {
    Crossfade(targetState = presenter.isLoading) { state ->
        when (state) {
            true -> LoadingScreen()
            false -> Scaffold(
                topBar = { scrollBehavior ->
                    val title by presenter.getToolbarTitle()
                    val tabVisible = presenter.tabVisibility && presenter.categories.size > 1
                    LibraryToolbar(
                        state = presenter,
                        title = title,
                        incognitoMode = !tabVisible && presenter.isIncognitoMode,
                        downloadedOnlyMode = !tabVisible && presenter.isDownloadOnly,
                        onClickUnselectAll = onClickUnselectAll,
                        onClickSelectAll = onClickSelectAll,
                        onClickInvertSelection = onClickInvertSelection,
                        onClickFilter = onClickFilter,
                        onClickRefresh = { onClickRefresh(null) },
                        scrollBehavior = scrollBehavior.takeIf { !tabVisible }, // For scroll overlay when no tab
                    )
                },
                bottomBar = {
                    LibraryBottomActionMenu(
                        visible = presenter.selectionMode,
                        onChangeCategoryClicked = onChangeCategoryClicked,
                        onMarkAsReadClicked = onMarkAsReadClicked,
                        onMarkAsUnreadClicked = onMarkAsUnreadClicked,
                        onDownloadClicked = onDownloadClicked.takeIf { presenter.selection.none { it.manga.source == LocalSource.ID } },
                        onDeleteClicked = onDeleteClicked,
                    )
                },
            ) { paddingValues ->
                val contentPadding = TachiyomiBottomNavigationView.withBottomNavPadding(paddingValues)
                if (presenter.searchQuery.isNullOrEmpty() && presenter.isLibraryEmpty) {
                    val handler = LocalUriHandler.current
                    EmptyScreen(
                        textResource = R.string.information_empty_library,
                        modifier = Modifier.padding(contentPadding),
                        actions = listOf(
                            EmptyScreenAction(
                                stringResId = R.string.getting_started_guide,
                                icon = Icons.Default.HelpOutline,
                                onClick = { handler.openUri("https://tachiyomi.org/help/guides/getting-started") },
                            ),
                        ),
                    )
                    return@Scaffold
                }

                LibraryContent(
                    state = presenter,
                    contentPadding = contentPadding,
                    currentPage = { presenter.activeCategory },
                    isLibraryEmpty = presenter.isLibraryEmpty,
                    showPageTabs = presenter.tabVisibility,
                    showMangaCount = presenter.mangaCountVisibility,
                    onChangeCurrentPage = { presenter.activeCategory = it },
                    onMangaClicked = onMangaClicked,
                    onToggleSelection = { presenter.toggleSelection(it) },
                    onToggleRangeSelection = { presenter.toggleRangeSelection(it) },
                    onRefresh = onClickRefresh,
                    onGlobalSearchClicked = onGlobalSearchClicked,
                    getNumberOfMangaForCategory = { presenter.getMangaCountForCategory(it) },
                    getDisplayModeForPage = { presenter.categories[it].display },
                    getColumnsForOrientation = { presenter.getColumnsPreferenceForCurrentOrientation(it) },
                    getLibraryForPage = { presenter.getMangaForCategory(page = it) },
                    isIncognitoMode = presenter.isIncognitoMode,
                    isDownloadOnly = presenter.isDownloadOnly,
                )
            }
        }
    }
}