package eu.kanade.presentation.source

import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material3.LocalTextStyle
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.material3.TextButton
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.nestedscroll.NestedScrollConnection
import androidx.compose.ui.input.nestedscroll.nestedScroll
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import eu.kanade.domain.source.model.Source
import eu.kanade.presentation.components.EmptyScreen
import eu.kanade.presentation.components.ItemBadges
import eu.kanade.presentation.components.LoadingScreen
import eu.kanade.presentation.source.components.BaseSourceItem
import eu.kanade.presentation.theme.header
import eu.kanade.presentation.util.horizontalPadding
import eu.kanade.tachiyomi.R
import eu.kanade.tachiyomi.ui.browse.migration.sources.MigrateSourceState
import eu.kanade.tachiyomi.ui.browse.migration.sources.MigrationSourcesPresenter

@Composable
fun MigrateSourceScreen(
    nestedScrollInterop: NestedScrollConnection,
    presenter: MigrationSourcesPresenter,
    onClickItem: (Source) -> Unit,
    onLongClickItem: (Source) -> Unit,
    onClickAll: (Source) -> Unit,
) {
    val state by presenter.state.collectAsState()
    when (state) {
        is MigrateSourceState.Loading -> LoadingScreen()
        is MigrateSourceState.Error -> Text(text = (state as MigrateSourceState.Error).error.message!!)
        is MigrateSourceState.Success ->
            MigrateSourceList(
                nestedScrollInterop = nestedScrollInterop,
                list = (state as MigrateSourceState.Success).sources,
                onClickItem = onClickItem,
                onLongClickItem = onLongClickItem,
                onClickAll = onClickAll
            )
    }
}

@Composable
fun MigrateSourceList(
    nestedScrollInterop: NestedScrollConnection,
    list: List<Pair<Source, Long>>,
    onClickItem: (Source) -> Unit,
    onLongClickItem: (Source) -> Unit,
    onClickAll: (Source) -> Unit,
) {
    if (list.isEmpty()) {
        EmptyScreen(textResource = R.string.information_empty_library)
        return
    }

    LazyColumn(
        modifier = Modifier.nestedScroll(nestedScrollInterop),
        contentPadding = WindowInsets.navigationBars.asPaddingValues(),
    ) {
        item(key = "title") {
            Text(
                text = stringResource(id = R.string.migration_selection_prompt),
                modifier = Modifier
                    .animateItemPlacement()
                    .padding(horizontal = horizontalPadding, vertical = 8.dp),
                style = MaterialTheme.typography.header
            )
        }

        items(
            items = list,
            key = { (source, _) ->
                source.id
            }
        ) { (source, count) ->
            MigrateSourceItem(
                modifier = Modifier.animateItemPlacement(),
                source = source,
                count = count,
                onClickItem = { onClickItem(source) },
                onLongClickItem = { onLongClickItem(source) },
                onClickAll = { onClickAll(source) }
            )
        }
    }
}

@Composable
fun MigrateSourceItem(
    modifier: Modifier = Modifier,
    source: Source,
    count: Long,
    onClickItem: () -> Unit,
    onLongClickItem: () -> Unit,
    onClickAll: () -> Unit,
) {
    BaseSourceItem(
        modifier = modifier,
        source = source,
        showLanguageInContent = source.lang != "",
        onClickItem = onClickItem,
        onLongClickItem = onLongClickItem,
        action = {
            ItemBadges(primaryText = "$count")
            TextButton(onClick = onClickAll) {
                Text(
                    text = stringResource(id = R.string.all),
                    style = LocalTextStyle.current.copy(
                        color = MaterialTheme.colorScheme.primary
                    )
                )
            }
        }
    )
}