package eu.kanade.presentation.library.components

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.text.KeyboardActions
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.outlined.FilterList
import androidx.compose.material.icons.outlined.FlipToBack
import androidx.compose.material.icons.outlined.Refresh
import androidx.compose.material.icons.outlined.Search
import androidx.compose.material.icons.outlined.SelectAll
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.LocalContentColor
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBarScrollBehavior
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalFocusManager
import androidx.compose.ui.platform.LocalSoftwareKeyboardController
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.input.ImeAction
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.sp
import eu.kanade.presentation.components.AppBar
import eu.kanade.presentation.components.Pill
import eu.kanade.presentation.components.SearchToolbar
import eu.kanade.presentation.library.LibraryState
import eu.kanade.presentation.theme.active
import eu.kanade.tachiyomi.R

@Composable
fun LibraryToolbar(
    state: LibraryState,
    title: LibraryToolbarTitle,
    incognitoMode: Boolean,
    downloadedOnlyMode: Boolean,
    onClickUnselectAll: () -> Unit,
    onClickSelectAll: () -> Unit,
    onClickInvertSelection: () -> Unit,
    onClickFilter: () -> Unit,
    onClickRefresh: () -> Unit,
    scrollBehavior: TopAppBarScrollBehavior?,
) = when {
    state.selectionMode -> LibrarySelectionToolbar(
        state = state,
        incognitoMode = incognitoMode,
        downloadedOnlyMode = downloadedOnlyMode,
        onClickUnselectAll = onClickUnselectAll,
        onClickSelectAll = onClickSelectAll,
        onClickInvertSelection = onClickInvertSelection,
    )
    state.searchQuery != null -> {
        val keyboardController = LocalSoftwareKeyboardController.current
        val focusManager = LocalFocusManager.current

        SearchToolbar(
            searchQuery = state.searchQuery!!,
            onChangeSearchQuery = { state.searchQuery = it },
            onClickCloseSearch = { state.searchQuery = null },
            onClickResetSearch = { state.searchQuery = "" },
            scrollBehavior = scrollBehavior,
            incognitoMode = incognitoMode,
            downloadedOnlyMode = downloadedOnlyMode,
            placeholderText = stringResource(R.string.action_search_hint),
            keyboardOptions = KeyboardOptions.Default.copy(
                imeAction = ImeAction.Search,
            ),
            keyboardActions = KeyboardActions(
                onSearch = {
                    focusManager.clearFocus()
                    keyboardController?.hide()
                },
            ),
        )
    }
    else -> LibraryRegularToolbar(
        title = title,
        hasFilters = state.hasActiveFilters,
        incognitoMode = incognitoMode,
        downloadedOnlyMode = downloadedOnlyMode,
        onClickSearch = { state.searchQuery = "" },
        onClickFilter = onClickFilter,
        onClickRefresh = onClickRefresh,
        scrollBehavior = scrollBehavior,
    )
}

@Composable
fun LibraryRegularToolbar(
    title: LibraryToolbarTitle,
    hasFilters: Boolean,
    incognitoMode: Boolean,
    downloadedOnlyMode: Boolean,
    onClickSearch: () -> Unit,
    onClickFilter: () -> Unit,
    onClickRefresh: () -> Unit,
    scrollBehavior: TopAppBarScrollBehavior?,
) {
    val pillAlpha = if (isSystemInDarkTheme()) 0.12f else 0.08f
    val filterTint = if (hasFilters) MaterialTheme.colorScheme.active else LocalContentColor.current
    AppBar(
        titleContent = {
            Row(verticalAlignment = Alignment.CenterVertically) {
                Text(
                    text = title.text,
                    maxLines = 1,
                    modifier = Modifier.weight(1f, false),
                    overflow = TextOverflow.Ellipsis,
                )
                if (title.numberOfManga != null) {
                    Pill(
                        text = "${title.numberOfManga}",
                        color = MaterialTheme.colorScheme.onBackground.copy(alpha = pillAlpha),
                        fontSize = 14.sp,
                    )
                }
            }
        },
        actions = {
            IconButton(onClick = onClickSearch) {
                Icon(Icons.Outlined.Search, contentDescription = stringResource(R.string.action_search))
            }
            IconButton(onClick = onClickFilter) {
                Icon(Icons.Outlined.FilterList, contentDescription = stringResource(R.string.action_filter), tint = filterTint)
            }
            IconButton(onClick = onClickRefresh) {
                Icon(Icons.Outlined.Refresh, contentDescription = stringResource(R.string.pref_category_library_update))
            }
        },
        incognitoMode = incognitoMode,
        downloadedOnlyMode = downloadedOnlyMode,
        scrollBehavior = scrollBehavior,
    )
}

@Composable
fun LibrarySelectionToolbar(
    state: LibraryState,
    incognitoMode: Boolean,
    downloadedOnlyMode: Boolean,
    onClickUnselectAll: () -> Unit,
    onClickSelectAll: () -> Unit,
    onClickInvertSelection: () -> Unit,
) {
    AppBar(
        titleContent = { Text(text = "${state.selection.size}") },
        actions = {
            IconButton(onClick = onClickSelectAll) {
                Icon(Icons.Outlined.SelectAll, contentDescription = "search")
            }
            IconButton(onClick = onClickInvertSelection) {
                Icon(Icons.Outlined.FlipToBack, contentDescription = "invert")
            }
        },
        isActionMode = true,
        onCancelActionMode = onClickUnselectAll,
        incognitoMode = incognitoMode,
        downloadedOnlyMode = downloadedOnlyMode,
    )
}

data class LibraryToolbarTitle(
    val text: String,
    val numberOfManga: Int? = null,
)