package eu.kanade.presentation.library

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.outlined.Apps
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import eu.kanade.presentation.components.TabbedDialog
import eu.kanade.presentation.components.TabbedDialogPaddings
import eu.kanade.presentation.components.TriStateItem
import eu.kanade.presentation.util.collectAsState
import eu.kanade.tachiyomi.R
import eu.kanade.tachiyomi.ui.library.LibrarySettingsScreenModel
import tachiyomi.domain.category.model.Category
import tachiyomi.domain.library.model.LibraryDisplayMode
import tachiyomi.domain.library.model.LibrarySort
import tachiyomi.domain.library.model.display
import tachiyomi.domain.library.model.sort
import tachiyomi.domain.library.service.LibraryPreferences
import tachiyomi.domain.manga.model.TriStateFilter
import tachiyomi.presentation.core.components.CheckboxItem
import tachiyomi.presentation.core.components.HeadingItem
import tachiyomi.presentation.core.components.IconItem
import tachiyomi.presentation.core.components.RadioItem
import tachiyomi.presentation.core.components.SortItem

@Composable
fun LibrarySettingsDialog(
    onDismissRequest: () -> Unit,
    screenModel: LibrarySettingsScreenModel,
    category: Category,
) {
    TabbedDialog(
        onDismissRequest = onDismissRequest,
        tabTitles = listOf(
            stringResource(R.string.action_filter),
            stringResource(R.string.action_sort),
            stringResource(R.string.action_display),
        ),
    ) { contentPadding, page ->
        Column(
            modifier = Modifier
                .padding(contentPadding)
                .padding(vertical = TabbedDialogPaddings.Vertical)
                .verticalScroll(rememberScrollState()),
        ) {
            when (page) {
                0 -> FilterPage(
                    screenModel = screenModel,
                )
                1 -> SortPage(
                    category = category,
                    screenModel = screenModel,
                )
                2 -> DisplayPage(
                    category = category,
                    screenModel = screenModel,
                )
            }
        }
    }
}

@Composable
private fun ColumnScope.FilterPage(
    screenModel: LibrarySettingsScreenModel,
) {
    val filterDownloaded by screenModel.libraryPreferences.filterDownloaded().collectAsState()
    val downloadedOnly by screenModel.preferences.downloadedOnly().collectAsState()
    TriStateItem(
        label = stringResource(R.string.label_downloaded),
        state = if (downloadedOnly) {
            TriStateFilter.ENABLED_IS
        } else {
            filterDownloaded
        },
        enabled = !downloadedOnly,
        onClick = { screenModel.toggleFilter(LibraryPreferences::filterDownloaded) },
    )
    val filterUnread by screenModel.libraryPreferences.filterUnread().collectAsState()
    TriStateItem(
        label = stringResource(R.string.action_filter_unread),
        state = filterUnread,
        onClick = { screenModel.toggleFilter(LibraryPreferences::filterUnread) },
    )
    val filterStarted by screenModel.libraryPreferences.filterStarted().collectAsState()
    TriStateItem(
        label = stringResource(R.string.label_started),
        state = filterStarted,
        onClick = { screenModel.toggleFilter(LibraryPreferences::filterStarted) },
    )
    val filterBookmarked by screenModel.libraryPreferences.filterBookmarked().collectAsState()
    TriStateItem(
        label = stringResource(R.string.action_filter_bookmarked),
        state = filterBookmarked,
        onClick = { screenModel.toggleFilter(LibraryPreferences::filterBookmarked) },
    )
    val filterCompleted by screenModel.libraryPreferences.filterCompleted().collectAsState()
    TriStateItem(
        label = stringResource(R.string.completed),
        state = filterCompleted,
        onClick = { screenModel.toggleFilter(LibraryPreferences::filterCompleted) },
    )

    when (screenModel.trackServices.size) {
        0 -> {
            // No trackers
        }
        1 -> {
            val service = screenModel.trackServices[0]
            val filterTracker by screenModel.libraryPreferences.filterTracking(service.id.toInt()).collectAsState()
            TriStateItem(
                label = stringResource(R.string.action_filter_tracked),
                state = filterTracker,
                onClick = { screenModel.toggleTracker(service.id.toInt()) },
            )
        }
        else -> {
            HeadingItem(R.string.action_filter_tracked)
            screenModel.trackServices.map { service ->
                val filterTracker by screenModel.libraryPreferences.filterTracking(service.id.toInt()).collectAsState()
                TriStateItem(
                    label = stringResource(service.nameRes()),
                    state = filterTracker,
                    onClick = { screenModel.toggleTracker(service.id.toInt()) },
                )
            }
        }
    }
}

@Composable
private fun ColumnScope.SortPage(
    category: Category,
    screenModel: LibrarySettingsScreenModel,
) {
    val sortingMode = category.sort.type
    val sortDescending = !category.sort.isAscending

    listOf(
        R.string.action_sort_alpha to LibrarySort.Type.Alphabetical,
        R.string.action_sort_total to LibrarySort.Type.TotalChapters,
        R.string.action_sort_last_read to LibrarySort.Type.LastRead,
        R.string.action_sort_last_manga_update to LibrarySort.Type.LastUpdate,
        R.string.action_sort_unread_count to LibrarySort.Type.UnreadCount,
        R.string.action_sort_latest_chapter to LibrarySort.Type.LatestChapter,
        R.string.action_sort_chapter_fetch_date to LibrarySort.Type.ChapterFetchDate,
        R.string.action_sort_date_added to LibrarySort.Type.DateAdded,
    ).map { (titleRes, mode) ->
        SortItem(
            label = stringResource(titleRes),
            sortDescending = sortDescending.takeIf { sortingMode == mode },
            onClick = {
                val isTogglingDirection = sortingMode == mode
                val direction = when {
                    isTogglingDirection -> if (sortDescending) LibrarySort.Direction.Ascending else LibrarySort.Direction.Descending
                    else -> if (sortDescending) LibrarySort.Direction.Descending else LibrarySort.Direction.Ascending
                }
                screenModel.setSort(category, mode, direction)
            },
        )
    }
}

@Composable
private fun ColumnScope.DisplayPage(
    category: Category,
    screenModel: LibrarySettingsScreenModel,
) {
    val portraitColumns by screenModel.libraryPreferences.portraitColumns().collectAsState()
    val landscapeColumns by screenModel.libraryPreferences.landscapeColumns().collectAsState()

    var showColumnsDialog by rememberSaveable { mutableStateOf(false) }
    if (showColumnsDialog) {
        LibraryColumnsDialog(
            initialPortrait = portraitColumns,
            initialLandscape = landscapeColumns,
            onDismissRequest = { showColumnsDialog = false },
            onValueChanged = { portrait, landscape ->
                screenModel.libraryPreferences.portraitColumns().set(portrait)
                screenModel.libraryPreferences.landscapeColumns().set(landscape)
                showColumnsDialog = false
            },
        )
    }

    HeadingItem(R.string.action_display_mode)
    listOf(
        R.string.action_display_grid to LibraryDisplayMode.CompactGrid,
        R.string.action_display_comfortable_grid to LibraryDisplayMode.ComfortableGrid,
        R.string.action_display_cover_only_grid to LibraryDisplayMode.CoverOnlyGrid,
        R.string.action_display_list to LibraryDisplayMode.List,
    ).map { (titleRes, mode) ->
        RadioItem(
            label = stringResource(titleRes),
            selected = category.display == mode,
            onClick = { screenModel.setDisplayMode(category, mode) },
        )
    }

    if (category.display != LibraryDisplayMode.List) {
        IconItem(
            label = stringResource(R.string.pref_library_columns),
            icon = Icons.Outlined.Apps,
            onClick = { showColumnsDialog = true },
        )
    }

    HeadingItem(R.string.overlay_header)
    val downloadBadge by screenModel.libraryPreferences.downloadBadge().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_download_badge),
        checked = downloadBadge,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::downloadBadge)
        },
    )
    val localBadge by screenModel.libraryPreferences.localBadge().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_local_badge),
        checked = localBadge,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::localBadge)
        },
    )
    val languageBadge by screenModel.libraryPreferences.languageBadge().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_language_badge),
        checked = languageBadge,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::languageBadge)
        },
    )
    val showContinueReadingButton by screenModel.libraryPreferences.showContinueReadingButton().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_show_continue_reading_button),
        checked = showContinueReadingButton,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::showContinueReadingButton)
        },
    )

    HeadingItem(R.string.tabs_header)
    val categoryTabs by screenModel.libraryPreferences.categoryTabs().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_show_tabs),
        checked = categoryTabs,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::categoryTabs)
        },
    )
    val categoryNumberOfItems by screenModel.libraryPreferences.categoryNumberOfItems().collectAsState()
    CheckboxItem(
        label = stringResource(R.string.action_display_show_number_of_items),
        checked = categoryNumberOfItems,
        onClick = {
            screenModel.togglePreference(LibraryPreferences::categoryNumberOfItems)
        },
    )
}